19-3455; Rev 0; 10/04 KIT ATION EVALU E L B AVAILA Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs The MAX2828/MAX2829 single-chip, RF transceiver ICs are designed specifically for OFDM 802.11 WLAN applications. The MAX2828 is designed for single-band 802.11a applications covering world-band frequencies of 4.9GHz to 5.875GHz. The MAX2829 is designed for dual-band 802.11a/g applications covering world-bands of 2.4GHz to 2.5GHz and 4.9GHz to 5.875GHz. The ICs include all circuitry required to implement the RF transceiver function, providing a fully integrated receive path, transmit path, VCO, frequency synthesizer, and baseband/control interface. Only the PA, RF switches, RF bandpass filters (BPF), RF baluns, and a small number of passive components are needed to form the complete RF front-end solution. Each IC completely eliminates the need for external SAW filters by implementing on-chip monolithic filters for both the receiver and transmitter. The baseband filtering and the Rx/Tx signal paths are optimized to meet the 802.11a/g IEEE standards and cover the full range of the required data rates (6, 9, 12, 18, 24, 36, 48, and 54Mbps for OFDM; 1, 2, 5.5, and 11Mbps for CCK/DSSS), at receiver sensitivity levels up to 10dB better than 802.11a/g standards. The MAX2828/MAX2829 transceivers are available in the small 56-pin, exposed paddle thin QFN package. Applications Single-/Dual-Band 802.11a/b/g Radios 4.9GHz Public Safety Radios 2.4GHz/5GHz MIMO and Smart Antenna Systems Features ♦ World-Band Operation MAX2828: 4.9GHz to 5.875GHz (802.11a) MAX2829: 2.4GHz to 2.5GHz and 4.9GHz to 5.875GHz (802.11a/b/g) ♦ Best-In-Class Transceiver Performance -75dBm Rx Sensitivity at 54Mbps (802.11g) -46dB (802.11g)/-51dB (802.11a) Tx Sideband Suppression 1.5% (802.11g) and 2% (802.11a) Tx EVM -100dBc/Hz (802.11g)/-95dBc/Hz (802.11a) LO Phase Noise Programmable Baseband Lowpass Filters Integrated PLL with 3-Wire Serial Interface 93dB (802.11g)/97dB (802.11a) Receiver GainControl Range 200ns Rx I/Q DC Settling 60dB Dynamic Range Rx RSSI 30dB Tx Power-Control Range Tx/Rx I/Q Error Detection I/Q Analog Baseband Interface for Tx and Rx Digital Mode Selection (Tx, Rx, Standby, and Power Down) Supports Both Serial and Parallel Gain Control ♦ MIMO and Smart Antenna Compatibility Coherent LO Phase Among Multiple Transceivers ♦ Support 40MHz Channel Bandwidth (Turbo Mode) ♦ Single +2.7V to +3.6V Supply ♦ 1µA Low-Power Shutdown Mode ♦ Small 56-Pin TQFN Package (8mm x 8mm) Ordering Information RXBBQ- RXBBQ+ RXBBI- RXBBI+ VCC B1 VCC B2 GND VCC B3 B4 B5 TOP VIEW VCC Pin Configurations 56 55 54 53 52 51 50 49 48 47 46 45 44 43 B6 1 42 RXHP VCC 2 41 RXENA B7 3 40 RSSI N.C. 4 39 SHDN GND 5 38 VCC RXRFH 6 37 BYPASS GND 7 TXRFH+ 8 TXRFH- 9 34 GND VCC 10 33 CPOUT N.C. 11 32 GND N.C. 12 31 VCC TXENA 13 30 ROSC PABIAS 14 29 LD PART TEMP RANGE PIN-PACKAGE MAX2828 ETN -40°C to +85°C 56 TQFN-EP* (T5688-2) MAX2829 ETN -40°C to +85°C *EP = Exposed paddle. 56 TQFN-EP* (T5688-2) 36 TUNE MAX2828 35 GND CS SCLK DIN VCC GND VREF VCC RBIAS VCC TXBBQ- TXBBQ+ TXBBI- VCC TXBBI+ 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX2828/MAX2829 General Description MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs ABSOLUTE MAXIMUM RATINGS RF Input Power ...............................................................+10dBm Continuous Power Dissipation (TA = +70°C) 56-Pin Thin QFN (derate 31.3mW/°C above +70°C)....2500mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10s) .................................+300°C VCC, TXRFH_, TXRFL_ to GND..............................-0.3V to +4.2V RXRFH, RXRFL, TXBBI_, TXBBQ_, ROSC, RXBBI_, RXBBQ_, RSSI, PABIAS, VREF, CPOUT, RXENA, TXENA, SHDN, CS, SCLK, DIN, B_, RXHP, LD, RBIAS, BYPASS to GND ....................................-0.3V to (VCC + 0.3V) RXBBI_, RXBBQ_, RSSI, PABIAS, VREF, CPOUT, LD Short-Circuit Duration...................................................10s CAUTION! ESD SENSITIVE DEVICE Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (MAX2828/MAX2829 evaluation kits: VCC = 2.7V to 3.6V, Rx/Tx set to maximum gain, RBIAS = 11kΩ, no signal at RF inputs, all RF inputs and outputs terminated into 50Ω, receiver baseband outputs are open, no signal applied to Tx I/Q BB inputs in Tx mode, fREFOSC = 40MHz, registers set to default settings and corresponding test mode, T A = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +2.7V and TA = +25°C, unless otherwise noted.) (Note 1) PARAMETERS Supply Voltage CONDITIONS MIN 2.7 Shutdown mode, reference oscillator not applied, VIL = 0 TA = +25°C 802.11g MAX2829 TA = -40°C to +85°C Standby mode TA = +25°C 802.11a MAX2828/MAX2829 TA = -40°C to +85°C 802.11g MAX2829 Rx mode 802.11a MAX2828/MAX2829 802.11g MAX2829 Tx mode Supply Current Rx I/Q Output Common-Mode Voltage 2 TYP 1 37 UNITS V µA 51 44 51 118 151 55 TA = +25°C TA = -40°C to +85°C 158 TA = +25°C 135 TA = -40°C to +85°C 180 188 TA = +25°C 124 TA = -40°C to +85°C 164 175 802.11a MAX2828/MAX2829 TA = +25°C Standby mode (MIMO) (Note 2) 802.11g MAX2829 TA = +25°C 65 802.11a MAX2828/MAX2829 TA = +25°C 70 Rx mode (MIMO) (Note 2) 802.11g MAX2829 TA = +25°C 136 802.11a MAX2828/MAX2829 TA = +25°C 154 Tx mode (MIMO) (Note 2) 802.11g MAX2829 TA = +25°C 139 802.11a MAX2828/MAX2829 TA = +25°C 157 142 TA = -40°C to +85°C 184 197 Tx calibration mode, TA = +25°C 802.11g MAX2829 129 802.11a MAX2828/MAX2829 147 RX calibration mode, TA = +25°C 802.11g MAX2829 188 802.11a MAX2828/MAX2829 210 TA = +25°C MAX 3.6 100 47 0.80 0.9 _______________________________________________________________________________________ mA 1.05 V Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs (MAX2828/MAX2829 evaluation kits: VCC = 2.7V to 3.6V, Rx/Tx set to maximum gain, RBIAS = 11kΩ, no signal at RF inputs, all RF inputs and outputs terminated into 50Ω, receiver baseband outputs are open, no signal applied to Tx I/Q BB inputs in Tx mode, fREFOSC = 40MHz, registers set to default settings and corresponding test mode, T A = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +2.7V and TA = +25°C, unless otherwise noted.) (Note 1) PARAMETERS Rx I/Q Output Common-Mode Voltage Variation CONDITIONS TA = -40°C (relative to +25°C) MIN TA = +85°C (relative to +25°C) Tx Baseband Input CommonMode Voltage Operating Range TYP -25 0.9 -1mA < IOUT < +1mA 1.3 V 13 µA 1.2 V VCC 0.4 Digital Input-Voltage High, VIH UNITS mV 20 Tx Baseband Input Bias Current Reference Voltage Output MAX V Digital Input-Voltage Low, VIL 0.4 V -1 +1 µA Digital Input-Current Low, IIL -1 +1 µA LD Output-Voltage High, VOH Sourcing 100µA VCC 0.4 LD Output-Voltage Low, VOL Sinking 100µA Digital Input-Current High, IIH V 0.4 V AC ELECTRICAL CHARACTERISTICS—802.11g Rx Mode (MAX2829) (MAX2829 evaluation kit: VCC = +2.7V, fIN = 2.437GHz; receiver baseband I/Q outputs at 112mVRMS (-19dBV), fREFOSC = 40MHz, SHDN = RXENA = CS = high, RXHP = TXENA = SCLK = DIN = low, RBIAS = 11kΩ, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted. Unmodulated single-tone RF input signal is used, unless otherwise indicated.) (Tables 1, 2, 3) PARAMETER CONDITIONS MIN TYP MAX UNITS 2.500 GHz RECEIVER SECTION: LNA RF INPUT TO BASEBAND I/Q OUTPUTS RF Input Frequency Range RF Input Return Loss 2.412 With 50Ω external match Maximum gain, B7:B1 = 1111111 Total Voltage Gain Minimum gain, B7:B1 = 0000000 LNA high-gain mode (B7:B6 = 11) -22 LNA medium-gain mode (B7:B6 = 10) -24 LNA low-gain mode (B7:B6 = 0X) -12 TA = +25°C 87 TA = -40°C to +85°C (Note 1) 85 TA = +25°C dB 94 dB 1 From high-gain mode (B7:B6 = 11) to medium-gain mode (B7:B6 = 10) (Note 3) -15.5 From high-gain mode (B7:B6 = 11) to low-gain mode (B7:B6 = 0X) (Note 3) -30.5 5.5 RF Gain Steps dB Gain Variation Over RF Band fRF = 2.412GHz to 2.5GHz Baseband Gain Range From maximum baseband gain (B5:B1 = 11111) to minimum baseband gain (B5:B1 = 00000) 3 62 dB dB _______________________________________________________________________________________ 3 MAX2828/MAX2829 DC ELECTRICAL CHARACTERISTICS (continued) MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs AC ELECTRICAL CHARACTERISTICS—802.11g Rx Mode (MAX2829) (continued) (MAX2829 evaluation kit: VCC = +2.7V, fIN = 2.437GHz; receiver baseband I/Q outputs at 112mVRMS (-19dBV), fREFOSC = 40MHz, SHDN = RXENA = CS = high, RXHP = TXENA = SCLK = DIN = low, RBIAS = 11kΩ, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted. Unmodulated single-tone RF input signal is used, unless otherwise indicated.) (Tables 1, 2, 3) PARAMETER DSB Noise Figure Output P-1dB Out-of-Band Input IP3 In-Band Input P-1dB In-Band Input IP3 CONDITIONS MIN TYP Voltage gain ≥ 65dB, with B7:B6 = 11 3.5 Voltage gain = 50dB, with B7:B6 = 11 4 Voltage gain = 45dB, with B7:B6 = 10 16 Voltage gain = 15dB, with B7:B6 = 0X 36 Voltage gain = 90dB, with B7:B6 = 11 3.2 -35dBm jammers at 40MHz and 78MHz offset; based on IM3 at 2MHz Voltage gain = 60dB, with B7:B6 = 11 -10 Voltage gain = 45dB, with B7:B6 = 10 -2 Voltage gain = 40dB, with B7:B6 = 0X 21 Voltage gain = 40dB, with B7:B6 = 11 -29 Voltage gain = 25dB, with B7:B6 = 10 -14 Voltage gain = 5dB, with B7:B6 = 0X 2 Tones at 7MHz and 8MHz, IM3 at 6MHz and 9MHz, PIN = -40dBm per tone Voltage gain = 40dB, with B7:B6 = 11 -17 Voltage gain = 25dB, with B7:B6 = 10 -5 Voltage gain = 5dB, with B7:B6 = 0X 14 MAX UNITS dB VP-P dBm dBm dBm I/Q Phase Error B7:B1 = 1101110, 1σ variation ±0.5 degrees I/Q Gain Imbalance B7:B1 = 1101110, 1σ variation ±0.1 dB Tx-to-Rx Conversion Gain for Rx I/Q Calibration B7:B1 = 0010101 (Note 4) -4 dB I/Q Static DC Offset RXHP = 1, B7:B1 = 1101110, 1σ variation ±2 mV I/Q DC Droop After switching RXHP to 0, D2 = 0 (see the RX Control/RSSI Register Definition section) ±1 mV/ms RF Gain-Change Settling Time Gain change from high gain to medium gain, high gain to low gain, or medium gain to low gain; gain settling to within ±2dB of steady state 0.4 µs Baseband VGA Settling Time Gain change from B5:B1 = 10111 to B5:B1 = 00111; gain settling to within ±2dB of steady state 0.1 µs Minimum differential resistance 10 kΩ Maximum differential capacitance 8 pF -67 dBm Rx I/Q Output Load Impedance Spurious Signal Emissions at LNA RF = 1GHz to 26.5GHz Input 4 _______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs (MAX2829 evaluation kit: VCC = +2.7V, fIN = 2.437GHz; receiver baseband I/Q outputs at 112mVRMS (-19dBV), fREFOSC = 40MHz, SHDN = RXENA = CS = high, RXHP = TXENA = SCLK = DIN = low, RBIAS = 11kΩ, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted. Unmodulated single-tone RF input signal is used, unless otherwise indicated.) (Tables 1, 2, 3) PARAMETER CONDITIONS MIN TYP MAX UNITS RECEIVER BASEBAND FILTERS Baseband -3dB Corner Frequency Baseband Filter Rejection (Nominal Mode) (See the Lowpass Filter Register section) Narrowband mode 7.5 Nominal mode 9.5 Turbo mode 1 14 Turbo mode 2 18 fBASEBAND = 15MHz 20 fBASEBAND = 20MHz 39 fBASEBAND > 40MHz 84 RXHP = 1, low range (D11 = 0, see the Rx Control/RSSI Register Definition section) 0.5 RXHP = 1, high range (D11 = 1, see the Rx Control/RSSI Register Definition section) 0.52 RXHP = 1, low range (D11 = 0, see the Rx Control/RSSI Register Definition section) 2 RXHP = 1, high range (D11 = 1, see the Rx Control/RSSI Register Definition section) 2.5 RXHP = 1, low range (D11 = 0, see the Rx Control/RSSI Register Definition section) 22.5 MHz dB RSSI RSSI Minimum Output Voltage V V RSSI Maximum Output Voltage RSSI Slope mV/dB RXHP = 1, high range (D11 = 1, see the Rx Control/RSSI Register Definition section) RSSI Output Settling Time To within 3dB of steady state 30 +40dB signal step 0.2 -40dB signal step 0.7 µs _______________________________________________________________________________________ 5 MAX2828/MAX2829 AC ELECTRICAL CHARACTERISTICS—802.11g Rx Mode (MAX2829) (continued) MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs AC ELECTRICAL CHARACTERISTICS—802.11a Rx Mode (MAX2828/MAX2829) (MAX2828/MAX2829 evaluation kits: VCC = +2.7V, fIN = 5.25GHz; receiver baseband I/Q outputs at 112mVRMS (-19dBV), fREFOSC = 40MHz, SHDN = RXENA = CS = high, RXHP = TXENA = SCLK = DIN = low, RBIAS = 11kΩ, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted. Unmodulated single-tone RF input signal is used, unless otherwise indicated.) (Tables 1, 2, 3) PARAMETER CONDITIONS MIN TYP MAX UNITS RECEIVER SECTION: LNA RF INPUT TO BASEBAND I/Q OUTPUTS RF Input Frequency Range RF Input Return Loss 802.11a low-band mode 4.900 5.350 802.11a high-band mode 5.470 5.875 With 50Ω external match LNA high-gain mode (B7:B6 = 11) -15 LNA medium-gain mode (B7:B6 = 10) -11 LNA low-gain mode (B7:B6 = 0X) Maximum gain, B7:B1 = 1111111 Total Voltage Gain Minimum gain, B7:B1 = 0000000 91 TA = -40°C to +85°C (Note 1) 88 From high-gain mode (B7:B6 = 11) to medium-gain mode (B7:B6 = 10) (Note 3) 97 dB 0 Baseband Gain Range DSB Noise Figure Output P-1dB Out-of-Band Input IP3 In-Band Input P-1dB 6 3 -19 dB RF Gain Steps Gain Variation Relative to 5.25GHz dB -7 TA = +25°C TA = +25°C GHz From high-gain mode (B7:B6 = 11) to low-gain mode (B7:B6 = 0X) (Note 3) -34.5 fRF = 4.9GHz -0.3 fRF = 5.35GHz 0.4 fRF = 5.875GHz -4 From maximum baseband gain (B5:B1 = 11111) to minimum baseband gain (B5:B1 = 00000) 62 Voltage gain ≥ 65dB, with B7:B6 = 11 4.5 Voltage gain = 50dB, with B7:B6 = 11 4.8 Voltage gain = 45dB, with B7:B6 = 10 15 Voltage gain = 15dB, with B7:B6 = 0X 36 Voltage gain = 90dB, with B7:B6 = 11 3.2 -35dBm jammers at 40MHz and 78MHz offset; based on IM3 at 2MHz Voltage gain = 60dB, with B7:B6 = 11 -15 Voltage gain = 45dB, with B7:B6 = 10 0.5 Voltage gain = 40dB, with B7:B6 = 0X 20 Voltage gain = 35dB, with B7:B6 = 11 -32 Voltage gain = 20dB, with B7:B6 = 10 -12 Voltage gain = 5dB, with B7:B6 = 0X 3 _______________________________________________________________________________________ dB dB dB VP-P dBm dBm Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs (MAX2828/MAX2829 evaluation kits: VCC = +2.7V, fIN = 5.25GHz; receiver baseband I/Q outputs at 112mVRMS (-19dBV), fREFOSC = 40MHz, SHDN = RXENA = CS = high, RXHP = TXENA = SCLK = DIN = low, RBIAS = 11kΩ, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted. Unmodulated single-tone RF input signal is used, unless otherwise indicated.) (Tables 1, 2, 3) PARAMETER CONDITIONS Tones at 7MHz and 8MHz, IM3 at 6MHz and 9MHz, PIN = -40dBm per tone In-Band Input IP3 MIN TYP Voltage gain = 35dB, with B7:B6 = 11 -24 Voltage gain = 20dB, with B7:B6 = 10 -5 Voltage gain = 5dB, with B7:B6 = 0X 13 MAX UNITS dBm I/Q Phase Error B7:B1 = 1101110, 1σ variation ±0.4 degrees I/Q Gain Imbalance B7:B1 = 1101110, 1σ variation ±0.1 dB Tx-to-Rx Conversion Gain for Rx I/Q Calibration B7:B1 = 0001111 (Note 4) 0 dB I/Q Static DC Offset RXHP = 1, B7:B1 = 1101110, 1σ variation ±2 mV I/Q DC Droop After switching RXHP to 0, D2 = 0 (see the Rx Control/RSSI Register Definition section) ±1 mV/ms RF Gain-Change Settling Time Gain change from high gain to medium gain, high gain to low gain, or medium gain to low gain; gain settling to within ±2dB of steady state 0.4 µs Baseband VGA Settling Time Gain change from B5:B1 = 10111 to B5:B1 = 00111; gain settling to within ±2dB of steady state 0.1 µs Minimum differential resistance 10 kΩ Maximum differential capacitance 8 pF -50 dBm Rx I/Q Output Load Impedance Spurious Signal Emissions at LNA RF = 1GHz to 26.5GHz input RECEIVER BASEBAND FILTERS Baseband -3dB Corner Frequency (See the Lowpass Filter Register Definition section) Narrow-band mode 7.5 Nominal mode 9.5 Turbo mode 1 14 Turbo mode 2 Baseband Filter Rejection (Nominal Mode) MHz 18 fBASEBAND = 15MHz 20 fBASEBAND = 20MHz 39 fBASEBAND > 40MHz 80 dB _______________________________________________________________________________________ 7 MAX2828/MAX2829 AC ELECTRICAL CHARACTERISTICS—802.11a Rx Mode (MAX2828/MAX2829) (continued) MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs AC ELECTRICAL CHARACTERISTICS—802.11a Rx Mode (MAX2828/MAX2829) (continued) (MAX2828/MAX2829 evaluation kits: VCC = +2.7V, fIN = 5.25GHz; receiver baseband I/Q outputs at 112mVRMS (-19dBV), fREFOSC = 40MHz, SHDN = RXENA = CS = high, RXHP = TXENA = SCLK = DIN = low, RBIAS = 11kΩ, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted. Unmodulated single-tone RF input signal is used, unless otherwise indicated.) (Tables 1, 2, 3) PARAMETER CONDITIONS MIN TYP MAX UNITS RSSI RXHP = 1, low range (D11 = 0, see the Rx Control/RSSI Register Definition section) 0.5 RXHP = 1, high range (D11 = 1, see the Rx Control/RSSI Register Definition section) 0.52 RXHP = 1, low range (D11 = 0, see the Rx Control/RSSI Register Definition section) 2 RXHP = 1, high range (D11 = 1, see the Rx Control/RSSI Register Definition section) 2.5 RXHP = 1, low range (D11 = 0, see the Rx Control/RSSI Register Definition section) 22.5 RSSI Minimum Output Voltage V RSSI Maximum Output Voltage V RSSI Slope mV/dB RXHP = 1, high range (D11 = 1, see the Rx Control/RSSI Register Definition section) RSSI Output Settling Time To within 3dB of steady state 30 +40dB signal step 0.2 -40dB signal step 0.7 µs AC ELECTRICAL CHARACTERISTICS—802.11g Tx Mode (MAX2829) (MAX2829 evaluation kit: VCC = +2.7V, fOUT = 2.437GHz, fREFOSC = 40MHz, SHDN = TXENA = CS = high, RXENA = SCLK = DIN = low, RBIAS = 11kΩ, 100mVRMS sine and cosine signal (or 100mVRMS, 54Mbps IEEE 802.11g I/Q signals wherever OFDM is mentioned) applied to baseband I/Q inputs of transmitter, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted.) (Table 4) PARAMETER CONDITIONS MIN TYP MAX UNITS TRANSMIT SECTION: Tx BASEBAND I/Q INPUTS TO RF OUTPUTS RF Output Frequency Range, fRF 2.412 2.500 1.5% EVM -2.5 B6:B1 = 111011 -4.5 Output Power 54Mbps 802.11g OFDM signal Output Power (CW) VIN = 100mVRMS at 1MHz I/Q CW signal, B6:B1 = 111111 -2 GHz dBm dBm Output Power Range B6:B1 = 111111 to B6:B1 = 000000 30 dB Carrier Leakage Without DC offset cancellation -27 dBc Unwanted Sideband Suppression Uncalibrated -46 dBc Tx Output ACP Measured with 1MHz resolution bandwidth at 22MHz offset from channel center (B6:B1 = 111011), OFDM signal -69 dBm/ MHz RF Output Return Loss With external 50Ω match -14 dB 8 _______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs (MAX2829 evaluation kit: VCC = +2.7V, fOUT = 2.437GHz, fREFOSC = 40MHz, SHDN = TXENA = CS = high, RXENA = SCLK = DIN = low, RBIAS = 11kΩ, 100mVRMS sine and cosine signal (or 100mVRMS, 54Mbps IEEE 802.11g I/Q signals wherever OFDM is mentioned) applied to baseband I/Q inputs of transmitter, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted.) (Table 4) PARAMETER RF Spurious Signal Emissions Baseband -3dB Corner Frequency Baseband Filter Rejection Tx Baseband Input Impedance CONDITIONS MIN TYP 2/3 x fRF -64 B6:B1 = 111011, OFDM signal 4/3 x fRF -61 5/3 x fRF -63 8/3 x fRF -52 (See the Lowpass Filter Register Definition section) Nominal mode 12 Turbo mode 1 18 Turbo mode 2 24 At 30MHz, in nominal mode (see the Lowpass Filter Register Definition section) Minimum differential resistance Maximum differential capacitance MAX UNITS dBm/ MHz MHz 60 dB 60 kΩ 0.7 pF TRANSMITTER LO LEAKAGE AND I/Q CALIBRATION USING LO LEAKAGE AND SIDEBAND DETECTOR (SEE THE Tx/Rx CALIBRATION MODE SECTION) Tx BASEBAND I/Q INPUTS TO RECEIVER OUTPUTS LO Leakage and SidebandDetector Output Amplifier Gain Range Lower -3dB Corner Frequency Calibration register, D12:D11 = 11, A3:A0 = 0110 Output at 1 x fTONE (for LO leakage = -29dBc), fTONE = 2MHz, 100mVRMS -3 dBVRMS Output at 2 x fTONE (for sideband suppression = -40dBc), fTONE = 2MHz, 100mVRMS D12:D11 = 00 to D12:D11 = 11, A3:A0 = 0110 -13 26 dB 1 MHz _______________________________________________________________________________________ 9 MAX2828/MAX2829 AC ELECTRICAL CHARACTERISTICS—802.11g Tx Mode (MAX2829) (continued) MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs AC ELECTRICAL CHARACTERISTICS—802.11a Tx Mode (MAX2828/MAX2829) (MAX2828/MAX2829 evaluation kits: VCC = +2.7V, fOUT = 5.25GHz, fREFOSC = 40MHz, SHDN = TXENA = CS = high, RXENA = SCLK = DIN = low, RBIAS = 11kΩ, 100mVRMS sine and cosine signal (or 100mVRMS, 54Mbps IEEE 802.11a I/Q signals wherever OFDM is mentioned) applied to baseband I/Q inputs of transmitter, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted.) (Table 4) PARAMETER CONDITIONS MIN TYP MAX UNITS TRANSMIT SECTION: Tx BASEBAND I/Q INPUTS TO RF OUTPUTS RF Output Frequency Range, fRF 802.11a low-band mode 4.900 5.350 802.11a high-band mode 5.470 5.875 2% EVM Output Power 54Mbps 802.11a OFDM signal Output Power (CW) VIN = 100mVRMS at 1MHz I/Q CW signal, B6:B1 = 111111 Output Power Variation Relative to 5.25GHz B6:B1 = 111100 -5 -6.5 -4.5 fRF = 4.9GHz -6 fRF = 5.35GHz -0.5 fRF = 5.875GHz -1 GHz dBm dBm dB Output Power Range B6:B1 = 111111 to B6:B1 = 000000 30 dB Carrier Leakage Without DC offset cancellation -27 dBc Unwanted Sideband Suppression Uncalibrated -51 dBc Tx Output ACP Measured with 1MHz resolution bandwidth at 30MHz offset from channel center (B6:B1 = 111100), OFDM signal -80 dBm/ MHz RF Output Return Loss With external 50Ω match -16 dB RF Spurious Signal Emissions Baseband -3dB Corner Frequency Baseband Filter Rejection Tx Baseband Input Impedance B6:B1 = 111100, OFDM signal (see the Lowpass Filter Register Definition section) 4/5 x fRF -55 6/5 x fRF -64 7/5 x fRF -65 8/5 x fRF -49 Nominal mode 12 Turbo mode 1 18 Turbo mode 2 24 At 30MHz, in nominal mode (see the Lowpass Filter Register Definition section) dBm/ MHz MHz 60 dB Minimum differential resistance 60 kΩ Maximum differential capacitance 0.7 pF TRANSMITTER LO LEAKAGE AND I/Q CALIBRATION USING LO LEAKAGE AND SIDEBAND DETECTOR (SEE THE Tx/Rx CALIBRATION MODE SECTION) Tx BASEBAND I/Q INPUTS TO RECEIVER OUTPUTS LO Leakage and SidebandDetector Output Amplifier Gain Range Lower -3dB Corner Frequency 10 Calibration register, D12:D11 = 1, A3:A0 = 0110 Output at 1 x fTONE (for LO leakage = -29dBc), fTONE = 2MHz, 100mVRMS -4.5 Output at 2 x fTONE (for sideband suppression = -40dBc), fTONE = 2MHz, 100mVRMS -14.5 D12:D11 = 00 to D12:D11 = 11, A3:A0 = 0110 dBVRMS 26 dB 1 MHz ______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs (MAX2828/MAX2829 evaluation kits: VCC = +2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, SCLK = DIN = low, PLL loop bandwidth = 150kHz, RBIAS = 11kΩ, TA = +25°C, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS FREQUENCY SYNTHESIZER RF Channel Center Frequency 802.11g mode 2412 2500 802.11a low-band mode 4900 5350 802.11a high-band mode 5470 5875 Charge-Pump Comparison Frequency Reference-Divider Ratio fREFOSC Input Levels AC-coupled 20 44 1 4 800 fREFOSC Input Impedance Closed-Loop Phase Noise 802.11a fOFFSET = 1kHz -87 fOFFSET = 10kHz -103 fOFFSET = 100kHz -99 fOFFSET = 1MHz -112 fOFFSET = 10MHz -125 fOFFSET = 1kHz -84 fOFFSET = 10kHz -95 fOFFSET = 100kHz -92 fOFFSET = 1MHz -108 fOFFSET = 10MHz -124 RMS phase jitter, 802.11g integrate from 10kHz 802.11a to 10MHz offset Reference Spurs kΩ dBc/Hz 0.6 degrees 1 Charge-Pump Output Current Charge-Pump Output Voltage 4 >70% of ICP 20MHz offset MHz mVP-P 10 802.11g Closed-Loop Integrated Phase Noise MHz 20 fREFOSC Input Frequency MHz 0.5 mA VCC - 0.5V 802.11g -65 802.11a -58 V dBc VOLTAGE-CONTROLLED OSCILLATOR VCO Tuning Voltage Range 0.4 VTUNE = 0.4V 802.11g LO Tuning Gain Low band 802.11a High band 2.3 V 135 VTUNE = 2.3V 62 VTUNE = 0.3V 324 VTUNE = 2.2V 167 VTUNE = 0.3V 330 VTUNE = 2.2V 175 MHz/V ______________________________________________________________________________________ 11 MAX2828/MAX2829 AC ELECTRICAL CHARACTERISTICS—Frequency Synthesis MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs AC ELECTRICAL CHARACTERISTICS—Miscellaneous Blocks (MAX2828/MAX2829 evaluation kits: VCC = +2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, SCLK = DIN = low, RBIAS = 11kΩ, TA = +25°C, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS PA BIAS DAC Number of Programmable Bits 6 Bits Minimum Output Sink Current D5:D0 = 000000 (see the PA Bias DAC Register Definition section) 0 µA Maximum Output Sink Current D5:D0 = 111111 (see the PA Bias DAC Register Definition section), output voltage = 0.8V 313 µA Turn-On Time D9:D6 = 0000 (see the PA Bias DAC Register Definition section) 0.2 µs 1 LSB DNL ON-CHIP TEMPERATURE SENSOR Output Voltage D11 = 1 (see the Rx Control/RSSI Register Definition section) TA = -40°C 0.5 TA = +25°C 1.05 TA = +85°C 1.6 V AC ELECTRICAL CHARACTERISTICS—Timing (MAX2828/MAX2829 evaluation kits: VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, SCLK = DIN = low, PLL loop bandwidth = 150kHz, RBIAS = 11kΩ, TA = +25°C, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS SYSTEM TIMING (See Figure 1) Turn-On Time From SHDN rising edge (PLL locked) Shutdown Time fRF = 2.412GHz to 2.5GHz Channel Switching Time Rx/Tx Turnaround Time µs 2 µs 25 fRF = 5.15GHz to 5.35GHz 35 fRF = 5.45GHz to 5.875GHz 130 fRF = 4.9GHz to 5.875GHz 130 Measured from Tx or Rx enable rising edge; signal settling to within ±2dB of steady state Rx to Tx µs 1 µs Tx to Rx, RXHP = 1 Tx Turn-On Time (From Standby Mode) From Tx enable rising edge; signal settling to within ±2dB of steady state Rx Turn-On Time (From Standby Mode) From Rx enable rising edge; signal settling to within ±2dB of steady state 12 50 1.2 1 µs 1.2 µs ______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs (MAX2828/MAX2829 evaluation kits: VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, SCLK = DIN = low, PLL loop bandwidth = 150kHz, RBIAS = 11kΩ, TA = +25°C, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS 3-WIRE SERIAL INTERFACE TIMING (SEE FIGURE 2) SCLK-Rising-Edge to CS-FallingEdge Wait Time, tCSO 6 ns Falling Edge of CS to Rising Edge of First SCLK Time, tCSS 6 ns DIN-to-SCLK Setup Time, tDS 6 ns DIN-to-SCLK Hold Time, tDH 6 ns SCLK Pulse-Width High, tCH 6 ns SCLK Pulse-Width Low, tCL 6 ns Last Rising Edge of SCLK to Rising Edge of CS or Clock to Load Enable Setup Time, tCSH 6 ns CS High Pulse Width, tCSW 20 ns Time Between the Rising Edge of CS and the Next Rising Edge of SCLK, tCS1 6 ns Clock Frequency, fCLK 40 MHz Rise Time, tR 2 ns Fall Time, tF 2 ns Note 1: Devices are production tested at +85°C only. Min and max limits at temperatures other than +85°C are guaranteed by design and characterization. Note 2: Register settings for MIMO mode. A3:A0 = 0101 and A3:A0 = 0010, D13 = 1. Note 3: The expected part-to-part variation of the RF gain step is ±1dB. Note 4: Tx I/Q inputs = 100mVRMS. Set Tx VGA gain to max. Table 1. Receiver Front-End Gain-Control Settings Table 2. Receiver Baseband VGA Gain Settings B7 B6 GAIN B5:B1 1 1 High 11111 Max 1 0 Medium 11110 Max - 2dB 0 X Low 11101 Max - 4dB GAIN : : 00000 Min ______________________________________________________________________________________ 13 MAX2828/MAX2829 AC ELECTRICAL CHARACTERISTICS—Timing (continued) Table 3. Receiver Baseband VGA Gain Step Control Table 4. Tx VGA Gain Control Settings NUMBER B6:B1 OUTPUT SIGNAL POWER 111111 Max BIT GAIN STEP (typ) 63 B1 2dB 62 111110 Max - 0.5dB 4dB 61 111101 Max - 1.0dB B3 8dB : : : B4 16dB 49 110001 Max - 7dB 32dB 48 110000 Max - 7.5dB 47 101111 Max - 8dB 46 101110 Max - 8dB 45 101101 Max - 9dB 44 101100 Max - 9dB : : : 5 000101 Max - 29dB 4 000100 Max - 29dB 3 000011 Max - 30dB 2 000010 Max - 30dB 1 000001 Max - 30dB 0 000000 Max - 30dB B2 B5 POWER SUPPLY ON POWER 3-WIRE SERIAL INTERFACE AVAILABLE SHDN SHUTDOWN RXENA RECEIVER ON (DRIVES RF T/R SWITCH) TRANSMITTER ON (DRIVES RF T/R SWITCH AND PA ON/OFF) TXENA CS SCLK DIN MAX2828/MAX2829 MAC XTAL-OSC MAC SPI MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs CS (SELECT) SCLK (CLOCK) DIN (DATA) SPI: PROGRAM 2.4GHz OR 5GHz MODE, CHANNEL FREQUENCY, PA BIAS, TRANSMITTER LINEARITY, RECEIVER RSSI OPERATION, CALIBRATION MODE, ETC. PABIAS PA BIAS D/A (DRIVES POWER RAMP CONTROL) SHUTDOWN MODE STANDBY MODE 0 TO 7µs RECEIVE MODE PA ENABLE TRANSMIT MODE Figure 1. System Timing Diagram 14 ______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs D12 D0 A3 A2 A1 A0 SCLK tDH tDS tCH tCL tCS1 CS tCSO tCSH tCSS tCSW t Figure 2. 3-Wire Serial-Interface Timing Diagram Typical Operating Characteristics (VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN = low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.) 802.11g TA = +85°C TA = +25°C 130 125 115 TA = -40°C TA = +25°C 120 115 115 TA = -40°C 105 110 100 110 105 -35 -30 -25 -20 -15 -10 -5 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 VCC (V) VCC (V) POUT (dBm) NOISE FIGURE vs. BASEBAND GAIN SETTINGS RX VOLTAGE GAIN vs. BASEBAND GAIN SETTINGS RX IN-BAND OUTPUT P-1dB vs. GAIN 15 GAIN (dB) LNA = MEDIUM GAIN LNA = MEDIUM GAIN 60 50 40 30 LNA = HIGH GAIN 5 20 3 LNA MEDIUM-/HIGH-GAIN SWITCH POINT 2 1 0 -1 -2 LNA = LOW GAIN LNA LOW-/MEDIUMGAIN SWITCH POINT -3 10 0 0 4 0 MAX2828/9 toc06 80 70 25 LNA = HIGH GAIN OUTPUT P-1dB (dBVRMS) 30 90 MAX2828/9 toc05 LNA = LOW GAIN 100 MAX2828/9 toc04 40 10 125 120 110 NF (dB) 135 ICC (mA) 120 20 130 140 125 35 TA = +85°C 145 ICC (mA) ICC (mA) 130 150 TX ICC vs. POUT 135 MAX2828/9 toc02 MAX2828/9 toc01 135 TX ICC vs. VCC 155 MAX2828/9 toc03 RX ICC vs. VCC 140 -4 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 GAIN SETTINGS GAIN SETTINGS 25 35 45 55 65 75 85 95 GAIN (dB) ______________________________________________________________________________________ 15 MAX2828/MAX2829 D13 DIN Typical Operating Characteristics (continued) (VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN = low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.) 802.11g OFDM EVM WITH OFDM JAMMER vs. OFDM JAMMER LEVEL WITH JAMMER OFFSET FREQUENCY -50 -60 fOFFSET = 40MHz -70 2.0 LNA = MEDIUM GAIN 1.5 1.0 -110 -10 -120 -100 -80 -60 -40 -20 0 -140 1GHz 20 RX I/Q DC OFFSET SETTLING RESPONSE (-8dB BB VGA GAIN STEP) RX I/Q DC OFFSET SETTLING RESPONSE (+8dB BB VGA GAIN STEP) 3V 2V 3V 2V 3V 2V 1V 1V 1V 0 0 0 6mV 6mV 6mV 4mV 4mV 4mV 2mV 2mV 2mV 0 0 0 20ns/div RX EVM vs. PIN 0 6mV 4mV 2mV 0 400ns/div RX EVM vs. VOUT 3.0 LNA = HIGH GAIN LNA = LOW GAIN PIN = -50dBm 2.5 2.0 EVM (%) EVM (%) 1V 12 11 10 9 8 7 6 5 4 3 2 1 0 MAX2828/9 toc14 MMAX2828/9 toc13 2V 400ns/div 20ns/div RX I/Q DC OFFSET SETTLING RESPONSE (-32dB BB VGA GAIN STEP) 3V 7GHz RX I/Q DC OFFSET SETTLING RESPONSE (-16dB BB VGA GAIN STEP) MAX2828/9 toc11 PIN (dBm) MAX2828/9 toc10 PJAMMER (dBm) MAX2828/9 toc12 -30 0 MAX2828/9 toc15 -50 -120 LNA = LOW GAIN -130 fOFFSET = 100MHz -70 -90 -100 0.5 -90 -80 (dBm) fOFFSET = 25MHz MAX2828/9 toc09 LNA = HIGH GAIN 2.5 fOFFSET = 20MHz -110 LNA = MEDIUM GAIN 1.5 1.0 0.5 0 -80 -70 -60 -50 -40 -30 PIN (dBm) 16 -40 MAX2828/9 toc08 PIN = -62dBm RX EMISSION SPECTRUM, LNA INPUT (TX OFF, LNA = LOW GAIN) RX RSSI OUTPUT vs. INPUT POWER 3.0 MAX2828/9 toc07 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 RSSI OUTPUT (V) EVM (%) MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs -20 -10 0 -29 -27 -25 -23 -21 -19 -17 -15 -13 -11 -9 VOUT (dBVRMS) ______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs 802.11g TA = -40°C 0 TA = -40°C 0 -3 TA = +25°C -2 -3 TA = +85°C 2.40 2.42 2.44 VCC (V) -90 f = 6.4GHz -70 RF LO (GHz) POUT (dBm) f = 2.56GHz -15 -20 -25 -80 -30 -90 -100 1MHz -35 0 26.5GHz 56 40 30 20 -90 10 (kHz) -80 -100 -10 -120 -20 -130 -30 -140 -40 -50 -150 1M FREQUENCY OFFSET (Hz) 10M TX-RX TURNAROUND FREQUENCY SETTLING 25kHz 5kHz/div 0 -110 100k 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 VTUNE (V) 64 MAX2828/9 toc23 -70 24 32 40 48 GAIN SETTINGS 50 MAX2828/9 toc22 -60 16 CHANNEL-SWITCHING FREQUENCY SETTLING (2500MHz TO 2400MHz) CLOSED-LOOP PHASE NOISE -50 8 2.60 2.58 2.56 2.54 2.52 2.50 2.48 2.46 2.44 2.42 2.40 2.38 2.36 2.34 2.32 2.30 MAX2828/9 toc21 -5 -10 -50 10k 2.477GHz LO FREQUENCY vs. VTUNE 0 f = 2.48GHz 1k 2.397GHz 2.50 MAX2828/9 toc24 -20 -60 2.48 MAX2828/9 toc20 f = 2.4GHz -40 2.46 TX OUTPUT POWER vs. GAIN SETTINGS MAX2828/9 toc19 0 -30 -60 -70 FREQUENCY (GHz) TX OUTPUT SPECTRUM -10 -50 -100 -6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 -40 -80 TA = +85°C -5 -6 B6:B1 = 110101 -30 -4 -5 B6:B1 = 111011 -20 (dBm/100kHz) TA = +25°C -2 -4 (dBm) -10 -1 POUT (dBm) POUT (dBm) -1 (dBm) MAX2828/9 toc17 1 MAX2828/9 toc16 1 TX OUTPUT SPECTRUM (54Mbps OFDM SIGNAL) TX OUTPUT POWER vs. FREQUENCY (B6:B1 = 111111) MAX2828/9 toc18 TX OUTPUT POWER vs. VCC (B6:B1 = 111111) -25kHz 0 250 TIME (µs) 0 50 TIME (µs) ______________________________________________________________________________________ 17 MAX2828/MAX2829 Typical Operating Characteristics (continued) (VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN = low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.) Typical Operating Characteristics (continued) (VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN = low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.) 802.11g 1.95 1.90 115 1.85 RX GAIN IMBALANCE MEAN = -826µV DEV = 1.75mV SAMPLE SIZE = 2270 192 160 92 128 69 96 46 64 23 32 MAX2828/9 toc27 MAX2828/9 toc25 138 MAX2828/9 toc26 RX STATIC DC OFFSET TX EVM vs. POUT 2.00 EVM (%) MEAN = 0.044dB DEV = 0.08dB SAMPLE SIZE = 2221 1.80 1.75 1.70 1.65 1.60 1.55 1.50 0 -25 -20 -15 -10 POUT (dBm) -5 0 0 1σ/div 1σ/div 160 TX LO LEAKAGE MAX2828/9 toc28 RX PHASE IMBALANCE 192 MEAN = 90.2° DEV = 0.63° SAMPLE SIZE = 2221 108 90 128 72 96 54 64 36 32 18 0 1σ/div 802.11g TX POUT AT 2.4GHz TX SIDEBAND SUPPRESSION 120 MEAN = -46.1dBc DEV = 4.94dB SAMPLE SIZE = 2196 102 85 96 68 72 51 48 34 24 17 MEAN = -3.32dB DEV = 0.518dB SAMPLE SIZE = 2196 0 0 1σ/div 18 MEAN = -29.5dBc DEV = 5.23dB SAMPLE SIZE = 2196 0 1σ/div 144 MAX2828/9 toc29 -30 1σ/div ______________________________________________________________________________________ MAX2828/9 toc31 -35 MAX2828/9 toc30 MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs 802.11a TA = +85°C 150 135 TA = +25°C TA = +85°C 130 TA = +25°C TA = -40°C TA = -40°C 115 -35 -10 -5 NOISE FIGURE vs. BASEBAND GAIN SETTINGS NOISE FIGURE vs. FREQUENCY RX VOLTAGE GAIN vs. BASEBAND GAIN SETTING 35 NF (dB) LNA = MEDIUM 30 GAIN = 15dB, B7:B6 = 0X 25 GAIN = 45dB, B7:B6 = 10 80 20 15 LNA = HIGH 5.25GHz 0 LNA = MEDIUM GAIN 60 40 15 5.85GHz LNA = HIGH GAIN 100 GAIN (dB) 5.85GHz 120 MAX2828/9 toc36 5.25GHz 40 MAX2828/9 toc35 LNA = LOW 20 GAIN = 50dB, B7:B6 = 11 10 LNA = LOW GAIN 20 5 0 GAIN > 65dB, B7:B6 = 11 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 FREQUENCY (GHz) GAIN SETTINGS GAIN SETTINGS RX VOLTAGE GAIN VARIATION vs. FREQUENCY 0 -2 LNA = HIGH GAIN LNA MEDIUM-/HIGH-GAIN SWITCH POINT 1 0 -1 4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 FREQUENCY (MHz) 2.0 LNA = MEDIUM GAIN 1.5 1.0 -2 0.5 -3 LNA = LOW GAIN -4 -6 LNA = HIGH GAIN 2.5 RSSI OUTPUT (V) LNA = LOW GAIN 3 2 RX RSSI OUTPUT vs. INPUT POWER 3.0 MAX2828/9 toc39 LNA = MEDIUM GAIN 4 OUTPUT P-1dB (dBVRMS) 4 RX IN-BAND OUTPUT P-1dB vs. GAIN MAX2828/9 toc38 6 0 4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 MAX2828/9 toc40 5 GAIN VARIATION (dB) -15 POUT (dBm) 25 -4 -20 VCC (V) 35 2 -25 VCC (V) 40 10 -30 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 MAX2828/9 toc37 100 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 50 NF (dB) 120 110 110 30 130 125 120 120 45 ICC (mA) 140 130 140 140 ICC (mA) ICC (mA) 150 145 MAX2828/9 toc33 160 MAX2828/9 toc32 160 TX ICC vs. POUT TX ICC vs. VCC 170 MAX2828/9 toc34 RX ICC vs. VCC 0 25 35 45 55 65 GAIN (dB) 75 85 95 -110 -90 -70 -50 -30 -10 10 PIN (dBm) ______________________________________________________________________________________ 19 MAX2828/MAX2829 Typical Operating Characteristics (continued) (VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN = low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.) Typical Operating Characteristics (continued) (VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN = low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.) 802.11a 3V 2V -65 1V 1V -70 0 0 -75 6mV 6mV -80 4mV 4mV -85 2mV 2mV 0 0 -90 1GHz RX I/Q DC OFFSET SETTLING RESPONSE (-32dB BB VGA GAIN STEP) MAX2828/9 toc44 RX I/Q DC OFFSET SETTLING RESPONSE (-16dB BB VGA GAIN STEP) 3V 20ns/div 20ns/div 14GHz RX EVM vs. PIN 16 MAX2828/9 toc45 3V LNA = HIGH GAIN LNA = MEDIUM GAIN 14 2V 2V 12 1V 1V 10 0 0 6mV 6mV 6 4mV 4mV 4 2mV 2mV 2 0 0 EVM (%) (dBm) 3V 2V -60 MAX2828/9 toc43 f = 8.3GHz MAX2828/9 toc46 f = 4.1GHz MAX2828/9 toc42 -55 MAX2828/9 toc41 -50 RX I/Q DC OFFSET SETTLING RESPONSE (-8dB BB VGA GAIN STEP) RX I/Q DC OFFSET SETTLING RESPONSE (+8dB BB VGA GAIN STEP) RX EMISSION SPECTRUM, LNA INPUT (TX OFF, LNA = LOW GAIN) 8 LNA = LOW GAIN 0 400ns/div 400ns/div -80 -70 -60 -50 -40 -30 -20 -10 0 PIN (dBm) PIN = -50dBm -3 3.0 TA = -40°C TA = +25°C -2 -4 2.0 -5 -6 TA = +25°C TA = +85°C -7 1.0 -9 0 -6 -8 TA = +85°C -10 -8 0.5 TA = -40°C -4 POUT (dBm) POUT (dBm) 2.5 1.5 20 -0 MAX2828/9 toc48 3.5 -2 MAX2828/9 toc47 4.0 TX OUTPUT POWER vs. FREQUENCY (B6:B1 = 111111) MAX2828/9 toc49 TX OUTPUT POWER vs. VCC (B6:B1 = 111111) RX EVM vs. VOUT EVM (%) MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs -12 -29 -27 -25 -23 -21 -19 -17 -15 -13 -11 -9 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 POUT (dBVRMS) VCC (V) FREQUENCY (GHz) ______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs 802.11a TX OUTPUT SPECTRUM (54Mbps OFDM SIGNAL) -50 -40 -60 -80 -70 -90 -80 -100 -90 -110 5.21GHz f = 7.2GHz -50 -70 f = 8.2GHz -50 -60 -70 5400 D10:D9 = 11 10 01 0 00 5200 5000 20 -90 10 -100 -10 -20 -30 4600 -140 -40 4400 -150 -50 1k 10k 100k 1M 10M 0 250 VTUNE (V) FREQUENCY OFFSET (Hz) TIME (µs) CHANNEL-SWITCHING FREQUENCY SETTLING (5.875GHz TO 4.9GHz) TX-RX TURNAROUND FREQUENCY SETTLING TX EVM vs. POUT 2.4 MAX2828/9 toc58 25kHz MAX2828/9 toc57 MAX2828/9 toc56 30 64 0 -110 -130 40 56 30 -120 50 2.3 2.2 20 10 5kHz/div EVM (%) (kHz) 24 32 40 48 GAIN SETTINGS 40 -80 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 16 50 4800 LOW-BAND VCO 8 CHANNEL-SWITCHING FREQUENCY SETTLING (5.35GHz TO 5.15GHz) (kHz) 5600 (dBm) LO FREQUENCY (MHz) 5800 -25 -40 MAX2828/9 toc54 00 01 -20 26.5GHz CLOSED-LOOP PHASE NOISE MAX2828/29 toc53 HIGH-BAND VCO 10 D10:D9 = 11 6000 -15 -35 LO FREQUENCY vs. VTUNE 6200 -10 -30 -100 1MHz 5.29GHz -5 MAX2828/9 toc55 -30 f = 6.2GHz MAX2828/9 toc52 -20 (dBm) (dBm/100kHz) -10 -40 -60 f = 5.2GHz POUT (dBm) B6:B1 = 111100 -30 0 MAX2828/9 toc51 -20 0 MAX2828/9 toc50 -10 TX OUTPUT POWER vs. GAIN SETTINGS TX OUTPUT SPECTRUM 0 2.1 2.0 -10 1.9 -20 -30 1.8 -40 1.7 -25kHz -50 0 250 TIME (µs) 0 50 TIME (µs) -35 -30 -25 -20 -15 -10 POUT (dBm) -5 ______________________________________________________________________________________ 0 21 MAX2828/MAX2829 Typical Operating Characteristics (continued) (VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN = low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.) Typical Operating Characteristics (continued) (VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN = low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.) 802.11a 155 MEAN = -0.007dB DEV = 0.08dB SAMPLE SIZE = 2268 240 200 92 124 160 69 93 120 46 62 80 23 31 40 0 96 80 MEAN = -47.9dBc DEV = 3.3dB SAMPLE SIZE = 2237 MAX2828/9 toc63 MEAN = -29.5dBc DEV = 5.24dB SAMPLE SIZE = 2236 802.11a TX POUT AT 5.25GHz TX SIDEBAND SUPPRESSION MAX2828/9 toc62 80 1σ/div 1σ/div TX LO LEAKAGE 102 85 64 64 68 48 48 51 32 32 34 16 16 17 0 MEAN = -2.8dB DEV = 0.68dB SAMPLE SIZE = 2237 0 0 1σ/div MEAN = 90.3° DEV = 0.55° SAMPLE SIZE = 2268 0 0 1σ/div 96 MAX2828/9 toc61 186 MAX2828/9 toc60 115 MEAN = -826µV DEV = 1.75mV SAMPLE SIZE = 2270 RX PHASE IMBALANCE RX GAIN IMBALANCE MAX2828/9 toc59 138 4MAX2828/9 toc64 RX STATIC DC OFFSET 1σ/div 1σ/div 802.11g/802.11a RX RSSI STEP RESPONSE (+40dB SIGNAL STEP) MAX2828/9 toc66 RX RSSI STEP RESPONSE (-40dB SIGNAL STEP) 2V MAX2828/9 toc67 I/Q OUTPUT DC ERROR DROOP (RXHP = 1–0; A3:A1 = 1000, D2 = 0) MAX2828/9 toc65 MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs 2V 1.5V 1.5V 1V 1V 0.5V 0.5V 0 0 20mV/div 20ms/div 22 200ns/div 200ns/div ______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs 802.11g/802.11a RX BB VGA SETTLING RESPONSE (+8dB GAIN STEP) 4V 4V 2V 4V 2V 2V 0 0 0 0.8V 2V 0.3V 0.6V 1.5V 0.2V 0.4V 1V 0.1V 0.2V 0.5V RX BB FREQUENCY RESPONSE vs. COARSE SETTING (FINE SETTING = 010) 0 (dB) 30 MAX2828/9 toc72 15 0 2V RX BB FREQUENCY RESPONSE vs. FINE SETTING (COARSE SETTING = 9.5MHz) 15 0 -15 -15 -30 -30 -45 -45 (dB) 2V 40ns/div 30 MAX2828/9 toc71 4V 40ns/div -60 -60 1.5V -75 1V -90 -90 -105 -105 -120 -135 1MHz -120 -135 1MHz 0.5V 0 40ns/div 40 GROUP DELAY RIPPLE (ns) -10 -20 -30 -40 -50 -60 -70 MAX2828/9 toc75 0 70MHz 50 MAX2828/9 toc74 10 -75 GROUP DELAY RIPPLE vs. FREQUENCY (COARSE SETTING = 9.5MHz) TX BASEBAND FREQUENCY RESPONSE MAX2828/9 toc73 RX BB VGA SETTLING RESPONSE (-32dB GAIN STEP) EVM (%) 0 0 40ns/div 70MHz RX I/Q COMMON-MODE VOLTAGE SPREAD 96 80 MEAN = 917mV DEV = 17.2mV SAMPLE SIZE = 2270 MAX2828/9 toc76 0 MAX2828/9 toc70 MAX2828/9 toc69 MAX2828/9 toc68 6V RX BB VGA SETTLING RESPONSE (-16dB GAIN STEP) RX BB VGA SETTLING RESPONSE (-8dB GAIN STEP) 64 30 48 20 32 10 16 -80 -90 0 1 10 POUT (dBm) 100 0 1 2 3 4 5 6 7 8 9 10 11 1σ/div FREQUENCY (MHz) ______________________________________________________________________________________ 23 MAX2828/MAX2829 Typical Operating Characteristics (continued) (VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN = low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.) MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs Block Diagrams/Typical Operating Circuits B6 VCC B7 Rx FRONT-END GAIN-CONTROL BIT FROM BASEBAND IC N.C. GND 1.8nH 0.5pF 5GHz Rx RF OUTPUT FROM SWITCH AND BPF 2nH RXRFH 0.5pF GND 55 54 53 52 51 50 49 48 47 46 45 RXBBQ- RXBBI- RXBBI+ VCC B1 VCC B2 GND VCC B3 B4 VCC B5 56 Rx FRONT-END AND Tx BASEBAND GAIN-CONTROL BIT FROM BASEBAND IC RXBBQ+ Rx ANALOG OUTPUT TO BASEBAND IC Rx/Tx BASEBAND-CONTROL BITS FROM BASEBAND IC 44 43 42 1 MUX MUX 2 41 MAX2828 3 40 39 RSSI 4 5 38 6 37 0° 7 36 RXHP RXENA RSSI SHDN CONTROL BIT FROM BASEBAND IC MODE-CONTROL LOGIC SIGNAL FROM BASEBAND IC RSSI OUTPUT MODE-CONTROL LOGIC SIGNAL FROM BASEBAND IC VCC BYPASS TUNE C1 150pF 1.2pF 5GHz Tx RF OUTPUT TO BPF AND PA TXRFH+ 1.2pF TXRFH- VCC 8 35 90° 9 34 10 33 32 N.C. 11 SERIAL INTERFACE 14 29 Tx ANALOG INPUT SIGNAL FROM BASEBAND IC 24 24 25 26 27 GND 10nF CPOUT C2 560pF GND VCC ROSC REFERENCE OSCILLATOR INPUT LD LOCK-DETECT OUTPUT TO BASEBAND IC 28 CS 23 SCLK 22 DIN 21 VCC 20 GND 19 VREF 18 VCC 17 RBIAS 16 VCC VCC 15 TXBBQ- PABIAS 30 TXBBQ+ PA BIAS CURRENT TO PA 31 13 TXBBI- TXENA TXBBI+ MODE-CONTROL LOGIC SIGNAL FROM BASEBAND IC 620Ω 300Ω PLL N.C. 12 GND SERIAL INPUT FROM BASEBAND IC ______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs B6 VCC 55 54 53 52 51 50 49 48 47 46 45 RXBBQ- RXBBI- RXBBI+ VCC B1 VCC B2 GND VCC B3 B4 VCC B5 56 Rx FRONT-END AND Tx BASEBAND GAIN-CONTROL BIT FROM BASEBAND IC RXBBQ+ Rx ANALOG OUTPUT TO BASEBAND IC Rx/Tx BASEBAND-CONTROL BITS FROM BASEBAND IC 44 43 42 1 MUX MUX 2 41 RXHP RXENA MAX2829 B7 Rx FRONT-END GAIN-CONTROL BIT FROM BASEBAND IC 40 3 RSSI CONTROL BIT FROM BASEBAND IC MODE-CONTROL LOGIC SIGNAL FROM BASEBAND IC RSSI OUTPUT RSSI 8.2pF 2.40GHz Rx RF OUTPUT FROM SWITCH AND BPF 3.6nH RXRFL 39 4 SHDN 1pF GND 1.8nH 0.5pF 5GHz Rx RF OUTPUT FROM SWITCH AND BPF RXRFH 5 38 0° 37 6 MODE-CONTROL LOGIC SIGNAL FROM BASEBAND IC VCC BYPASS 90° 2nH 0.5pF GND 0° 7 1.2pF 5GHz Tx RF OUTPUT TO BPF AND PA TXRFH+ 1.2pF TXRFH- VCC 36 ÷2 8 35 90° TUNE C1 150pF GND 620Ω 300Ω PLL 9 34 10 33 GND 10nF CPOUT C2 560pF 1.8pF 2.4GHz TX RF OUTPUT TO BPF AND PA TXRFL+ 32 11 GND 6.8nH 31 TXENA 13 30 29 14 Tx ANALOG INPUT SIGNAL FROM BASEBAND IC 25 26 27 VCC ROSC REFERENCE OSCILLATOR INPUT LD LOCK-DETECT OUTPUT TO BASEBAND IC 28 CS 24 SCLK 23 DIN 22 VCC 21 GND 20 VREF 19 VCC 18 RBIAS 17 VCC 16 TXBBQ- VCC 15 TXBBQ+ PABIAS PA BIAS CURRENT TO PA 12 TXBBI- MODE-CONTROL LOGIC SIGNAL FROM BASEBAND IC SERIAL INTERFACE TXBBI+ 1.8pF TXRFL- SERIAL INPUT FROM BASEBAND IC ______________________________________________________________________________________ 25 MAX2828/MAX2829 Block Diagrams/Typical Operating Circuits (continued) MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs Pin Description PIN NAME MAX2828 MAX2829 1 1 B6 2 2 VCC 26 FUNCTION Rx Front-End and Tx Gain-Control Digital Input Bit 6 2.4GHz/5GHz LNA Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share the bypass-capacitor ground vias with any other branches. 3 3 B7 4, 11, 12 — N.C. Rx Front-End Gain-Control Digital Input Bit 7 No Connection. Leave unconnected. 5 5 GND LNA Ground. Make connections to ground vias as short as possible. Do not share ground vias with any of the other branches. 6 6 RXRFH 7 7 GND 8 8 TXRFH+ 9 9 TXRFH- 10 10 VCC 13 13 TXENA Tx Mode Enable Digital Input. Set high to enable Tx (see Figure 1). 14 14 PABIAS DAC Current Output. Connect directly to the external PA bias pin. 15 15 VCC 16 16 TXBBI+ 17 17 TXBBI- 18 18 TXBBQ+ 19 19 TXBBQ- 20 20 VCC Tx Upconverter Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share the bypass-capacitor ground vias with any other branches. 21 21 RBIAS This Analog Voltage Input is Internally Biased to a Bandgap Voltage. Connect an external precision 11kΩ resistor or current source between this pin and ground to set the bias current for the device. 22 22 VCC Reference Circuit Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share the bypass-capacitor ground vias with any other branches. 23 23 VREF Reference Voltage Output 24 24 GND Digital Circuit Ground. Make connections to ground vias as short as possible. Do not share ground vias with any other branches. 25 25 VCC Digital Circuit Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share the bypass-capacitor ground vias with any other branches. 5GHz Single-Ended LNA Input. Requires AC-coupling and external matching network. LNA Ground. Make connections to ground vias as short as possible. Do not share ground vias with any other branches. 5GHz Tx PA Driver Differential Outputs. Requires AC-coupling and external matching network (and balun) to the external PA input. Tx RF Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share the bypass-capacitor ground vias with any other branches. Tx Baseband Filter Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share the bypass-capacitor ground vias with any other branches. Tx Baseband I-Channel Differential Inputs Tx Baseband Q-Channel Differential Inputs ______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs PIN NAME FUNCTION MAX2828 MAX2829 26 26 DIN Data Digital Input of 3-Wire Serial Interface (See Figure 2) 27 27 SCLK Clock Digital Input of 3-Wire Serial Interface (See Figure 2) 28 28 CS Active-Low Enable Digital Input of 3-Wire Serial Interface (See Figure 2) Lock-Detect Digital Output of Frequency Synthesizer. Output high indicates that the frequency synthesizer is locked. 29 29 LD 30 30 ROSC Reference Oscillator Input. Connect an external reference oscillator to this analog input. 31 31 VCC PLL Charge-Pump Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share the bypass-capacitor ground vias with any other branches. 32 32 GND Charge-Pump Circuit Ground. Make connections to ground vias as short as possible. Do not share ground vias with any other branches. 33 33 CPOUT Charge-Pump Output. Connect the frequency synthesizer’s loop filter between CPOUT and TUNE. Keep the line from this pin to the tune input as short as possible to prevent spurious pickup. Connect C2 as close to CPOUT as possible. Do not share the capacitor ground vias with any other branches (see the Typical Operating Circuit). 34 34 GND Ground. Make connections to ground vias as short as possible. Do not share ground vias with any other branches. 35 35 GND VCO Ground. Make connections to ground vias as short as possible. Do not share ground vias with any other branches. 36 36 TUNE VCO TUNE Input. Connect C1 as close to TUNE as possible. Connect the ground of C1 to VCO ground. Do not share the capacitor ground vias with any other branches (see the Typical Operating Circuit). 37 37 BYPASS Bypass with a 0.1µF Capacitor to GND. The capacitor is used by the on-chip VCO voltage regulator. 38 38 VCC 39 39 SHDN 40 40 RSSI 41 41 RXENA 42 42 RXHP 43 43 RXBBQ- 44 44 RXBBQ+ 45 45 RXBBI- 46 46 RXBBI+ 47 47 VCC 48 48 B1 49 49 VCC VCO Supply Voltage. Bypass to system ground as close as possible to the pin with capacitors. Do not share the ground vias for the bypass capacitors with any other branches. Active-Low Shutdown Digital Input. Set high to enable the device. RSSI or Temperature-Sensor Multiplexed Output Rx Mode Enable Digital Input. Set high to enable Rx. Rx Baseband AC-Coupling Highpass Corner Frequency Control Digital Input Selection Bit Rx Baseband Q-Channel Differential Outputs. In Tx calibration mode, these pins are the LO leakage and sideband-detector outputs. Rx Baseband I-Channel Differential Outputs. In Tx calibration mode, these pins are the LO leakage and sideband-detector outputs. Rx Baseband Buffer Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share the bypass-capacitor ground vias with any other branches. Rx/Tx Gain-Control Digital Input Bit 1 Rx Baseband Filter Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share the bypass-capacitor ground vias with any other branches. ______________________________________________________________________________________ 27 MAX2828/MAX2829 Pin Description (continued) MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs Pin Description (continued) PIN NAME FUNCTION MAX2828 MAX2829 50 50 B2 51 51 GND Rx IF Ground. Make connections to ground vias as short as possible. Do not share ground vias with any other branches. 52 52 VCC Rx IF Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share the bypass-capacitor ground vias with any other branches. 53 53 B3 Rx/Tx Gain-Control Digital Input Bit 3 54 54 B4 Rx/Tx Gain-Control Digital Input Bit 4 55 55 VCC 56 56 B5 — 4 RXRFL 2.4GHz Single-Ended LNA Input. Requires AC-coupling and external matching network. — 11 TXRFL+ — 12 TXRFL- 2.4GHz Tx PA Driver Differential Outputs. Requires AC-coupling and external matching network (and balun) to the external PA input. EP EP EXPOSED PADDLE Rx/Tx Gain-Control Digital Input Bit 2 Rx Downconverter Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share the bypass-capacitor ground vias with any other branches. Rx/Tx Gain-Control Digital Input Bit 5 Exposed Paddle. Connect to the ground plane with multiple vias for proper operation and heat dissipation. Table 5. Mode Table MODE Detailed Description LOGIC PINS SHDN TXENA RXENA REGISTER SETTINGS X SPI™ Reset 0 1 1 Shutdown 0 0 0 X Standby 1 0 0 X Rx 1 0 1 X Tx 1 1 0 X Tx Calibration 1 1 0 Calibration register D1 = 1 Rx Calibration 1 0 1 Calibration register D0 = 1 The MAX2828/MAX2829 single-chip, RF transceiver ICs are designed for WLAN applications. The MAX2828 is designed for 5GHz 802.11a (OFDM), and the MAX2829 is designed for dual-band 2.4GHz 802.11b/g and 5GHz 802.11a. The ICs include all circuitry required to implement the RF transceiver function, fully integrating the receive path, transmit path, VCO, frequency synthesizer, and baseband/control interface. Modes of Operation The MAX2828/MAX2829 have seven primary modes of operation: shutdown, SPI reset, standby, transmit, receive, transmitter calibration, and receiver calibration (see Table 5). X = Don’t care or do not apply. SPI is a trademark of Motorola, Inc. 28 ______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs SPI Reset By driving RXENA and TXENA high while setting SHDN low, all circuit blocks are powered down, as in shutdown mode. However, in SPI reset mode, all registers are returned to their default states. It is recommended to reset the SPI and all registers at the start of power-up to ensure that the registers are set to the correct values (see Table 9). Standby Mode To place the device in standby mode, set SHDN high and RXENA and TXENA low. This mode is mainly used to enable the frequency synthesizer block while the rest of the device is powered down. In this mode, various blocks in the system can be selectively turned on or off according to the standby register table (Table 10). Receive (Rx) Mode To place the device in Rx mode, set RXENA high. All receiver blocks are enabled in this mode. Transmit (Tx) Mode To place the device in Tx mode, set TXENA high. All transmitter blocks are enabled in this mode. Tx/Rx Calibration Mode The MAX2828/MAX2829 feature Tx/Rx calibration modes to detect I/Q imbalances and transmit LO leakage. In the Tx calibration mode, the LO leakage calibration is done only for the LO leakage signal that is present at the center frequency of the channel (i.e., in the middle of the OFDM or QPSK spectrum). The LO leakage calibration includes the effect of all DC offsets in the entire baseband paths of the I/Q modulator, and also includes direct leakage of the LO to the I/Q modulator output. The transmitter LO leakage and sideband-detector output is taken at the receiver I- or Q-channel output during this calibration phase. During Tx LO leakage and I/Q imbalance calibration, a sine and cosine signal (f = fTONE) is input to the baseband I/Q Tx pins from the baseband IC. At the LO leakage and sideband-detector output, the LO leakage corresponds to the signal at fTONE and the sideband suppression corresponds to the signal at 2 x fTONE. The output power of these signals vary 2dB for 1dB of variation in the LO leakage and unwanted sideband levels. To calibrate the Tx path, first set the powerdetector gain to 8dB (Table 14). Adjust the DC offset of the baseband inputs to minimize the signal at fTONE (LO leakage). Then, adjust the baseband input relative magnitude and phase offsets to reduce the signal at 2 x fTONE. If required, calibration can be done with higher LO leakage and sideband-detector gain settings to decrease LO leakage and increase image suppression. After calibrating the transmitter, receiver calibration can be done. In Rx calibration mode, the calibrated Tx RF signal is internally routed to the Rx downconverter inputs. In this loopback calibration mode, the voltage regulator must be able to source 350mA total since both Tx and Rx are turned on simultaneously. RF Synthesizer Programming in 5GHz Mode In the 5GHz mode, the RF frequency synthesizer covers a 4.9GHz to 5.9GHz range. To achieve this large tuning range while maintaining excellent noise performance, the 1GHz band is divided into sub-bands within which the VCO is tuned. The selection of the appropriate VCO sub-band is done automatically by a finite state machine (FSM). The PLL settling time is approximately 300µs for a change of 1GHz in the channel frequency. A faster PLL settling can be achieved by overriding the FSM and manually programming the VCO sub-band. Automatic VCO Sub-Band Selection By enabling this band-selection mode, only 1 bit needs to be programmed to start the frequency acquisition. The FSM will automatically stop after it selects the correct VCO sub-band, and after the PLL has locked. ______________________________________________________________________________________ 29 MAX2828/MAX2829 Shutdown Mode Shutdown mode is achieved by driving SHDN low. In shutdown mode, all circuit blocks are powered down, except for the serial interface. While the device is in shutdown, the values of the serial interface registers are maintained and can be changed as long as VCC (pin 25) is applied. MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs Table 6. B1:B0 VCO Sub-Band Assignments (Read Back Through LockDetect Pin) B1 B0 0 0 Band 0 (lowest frequency band) VCO FREQUENCY BAND 0 1 PROGRAMMED VCO FREQUENCY BAND D10 D9 Band 1 0 0 Band 0 1 0 Band 2 0 1 Band 1 1 1 Band 3 (highest frequency band) 1 0 Band 2 1 1 Band 3 The following steps should be followed: 1) Set D8 = 0 (A3:A0 = 0101) to enable the automatic VCO sub-band selection by the FSM. 2) Enable the PLL and VCO if required. If required, program the divider ratios corresponding to the desired channel frequency. 3) Set D7 = 1 (A3:A0 = 0101) to start the FSM. The FSM should only be started after PLL and VCO are enabled, or after channel frequency is changed. 4) The VCO sub-band selection and PLL settling time takes less than approximately 300µs. After the band switching is completed and the PLL has locked to the correct channel frequency, the FSM stops automatically. Every time the channel frequency is programmed or the PLL+VCO is enabled, the FSM needs to be reset to be used again for the next time. This reset operation does not affect the PLL or VCO. To reset the FSM, set D7 = 0 (A3:A0 = 0101). Every channel frequency maps to some VCO subband. Each VCO sub-band has a digital code, of which the 2 LSBs (B1:B0) are readable. The B1:B0 code can be read through pin LD by programming D3:D0 = 0111 (A3:A1 = 0000) for B1, or D3:D0 = 0110 (A3:A1 = 0000) for B0 (see Table 6). Manual VCO Sub-Band Selection For faster settling, the VCO sub-band (B1:B0) can be directly programmed through the SPI. First, the B1:B0 code for every channel frequency must be determined. Once this is known, the B1:B0 code is directly programmed along with the PLL divider values, for the given channel frequency. The PLL settling time in this case is approximately 50µs. Large temperature changes (>+50°C) may cause the channel frequency to move into an adjacent sub-band. To determine the correct sub-band, two on-chip comparators monitor the VCO control voltage (V TUNE ). These comparator logic outputs can be read through 30 Table 7. D10:D9 VCO Sub-Band Assignments (For Programming Through SPI) Table 8. Comparator-Output Definition A3:A1 = 0000; A3:A1 = 0000; D3:D0 = 0101 D3:D0 = 0100 RESPONSE 0 0 Program to a lower sub-band if VCO is not in Band 0. 0 1 No change. 1 0 Program to a higher subband if VCO is not in Band 3. 1 1 Invalid state, does not occur. the LD pin to decide whether the frequency sub-band is correct or needs to be reprogrammed. The following steps need to be followed to complete manual PLL frequency acquisition and VCO sub-band selection: 1) Set D8 = 1 (A3:A0 = 0101) to enable manual VCO sub-band selection. 2) Enable the PLL and VCO if required. If required, program the divider ratios corresponding to the desired channel frequency. 3) Set D10:D9 (A3:A0 = 0101) to program the VCO frequency sub-band according to Table 7. D10:D9 correspond to the same assignments as B1:B0. After D10:D9 are programmed, 50µs is required to allow the PLL to settle. 4) After 50µs of PLL settling time, the comparator outputs can be read through pin LD (see Table 8). 5) Based on the comparator outputs, the VCO frequency sub-band is programmed again according to Table 8 until the frequency acquisition is achieved. Large Temperature Changes If the PLL and VCO are continuously active (i.e., no reprogramming) and the die temperature changes by 50°C (as indicated by the on-chip temperature sensor), there is a possibility that the PLL may get unlocked due ______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs DEFAULT REGISTER ADDRESS TABLE D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 (A3:A0) Register 0 0 1 0 0 0 1 0 1 0 0 0 0 0 0 0000 Register 1 0 0 0 0 0 0 1 1 0 0 1 0 1 0 0001 — Standby 0 1 0 0 0 0 0 0 0 0 0 1 1 1 0010 10 Integer-Divider Ratio 1 1 0 0 0 0 1 0 1 0 0 0 1 0 0011 11 FractionalDivider Ratio 0 1 1 1 0 1 1 1 0 1 1 1 0 1 0100 12 Band Select and PLL 0 1 1 0 0 0 0 0 1 0 0 1 0 0 0101 13 — Calibration 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0110 14 Lowpass Filter 0 0 0 0 0 0 0 0 1 0 1 0 1 0 0111 15 Rx Control/RSSI 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1000 16 Tx Linearity/Baseband Gain 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1001 17 PA Bias DAC 0 0 0 0 1 1 1 1 0 0 0 0 0 0 1010 18 Rx Gain 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1011 19 Tx VGA Gain 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1100 20 Table 10. Standby Register (A3:A0 = 0010) DATA BIT DEFAULT DESCRIPTION D13 0 MIMO Select. Set to 0 for normal operation. Set to 1 for MIMO applications. D12 1 Set to 1 D11 0 Voltage Reference (Pin 23) D10 0 PA Bias DAC, in Tx Mode D9 0 D8 0 D7 0 D6 0 D5 0 D4 0 D3 0 D2 1 D1 1 D0 1 Set to 0 Set to 1 to the VCO drifting to an adjacent sub-band. In this case, it is advisable to reprogram the PLL by either manual or automatic sub-band selection. Programmable Registers The MAX2828/MAX2829 include 13 programmable, 18bit registers: 0, 1, standby, integer-divider ratio, fractional-divider ratio, band select and PLL, calibration, lowpass filter, Rx control/RSSI, Tx linearity/baseband gain, PA bias DAC, Rx gain, and Tx VGA gain. The 14 most significant bits (MSBs) are used for register data. The 4 least significant bits (LSBs) of each register contain the register address. Data is shifted in MSB first. The data sent to the devices, in 18-bit words, is framed by CS. When CS is low, the clock is active and data is shifted with the rising edge of the clock. When CS transitions high, the shift register is latched into the register selected by the contents of the address bits. Only the last 18 bits shifted into the device are retained in the shift register. No check is made on the number of clock pulses. For programming data words less than 14 bits long, only the required data bits and the address bits are required to be shifted, resulting in faster Rx and Tx gain control where only the LSBs need to be pro- ______________________________________________________________________________________ 31 MAX2828/MAX2829 Table 9. Register Default/SPI Reset Settings MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs Table 11. Integer-Divider Ratio Register (A3:A0 = 0011) DATA BIT DEFAULT D13 1 D12 1 D11 0 D10 0 D9 0 D8 0 D7 1 D6 0 D5 1 D4 0 D3 0 D2 0 D1 1 D0 0 DESCRIPTION 2 LSBs of the Fractional-Divider Ratio Set to 0 Integer-Divider Ratio Word Programming Bits. Valid values are from 128 (D7:D0 = 10000000) to 255 (D7:D0 = 11111111). grammed. The interface can be programmed through the 3-wire SPI/MICROWIRE™-compatible serial port. Standby Register Definition (A3:A0 = 0010) Various internal blocks can be turned on or off using the standby register (in standby mode, see Table 10). Setting a bit to 1 turns the block on, while setting a bit to 0 turns the block off. Integer-Divider Ratio Register Definition (A3:A0 = 0011) This register contains the integer portion of the divider ratio of the synthesizer. This register, in conjunction with the fractional-divider ratio register, permits selection of a precise frequency. The main synthesizer divide ratio is an 8-bit value for the integer portion (see Table 11). Valid values for this register are from 128 to 255 (D7–D0). The default value is 210. D13 and D12 are reserved for the 2 LSBs of the fractional-divider ratio. Fractional-Divider Ratio Register Definition (A3:A0 = 0100) This register (along with D13 and D12 of the integerdivider ratio register) controls the fractional-divider ratio with 16-bit resolution. D13 to D0 of this register combined with D13 and D12 of the integer-divider ratio register form the whole fractional-divider ratio (see Tables 12a and 12b). On startup, it is recommended to reset all registers by placing the device in SPI reset mode (Table 5). MICROWIRE is a trademark of National Semiconductor Corp. Table 12a. IEEE 802.11g Frequency Plan and Divider Ratio Programming Words fRF (MHz) (fRF x 4/3) / 20MHz (DIVIDER RATIO) INTEGER-DIVIDER RATIO FRACTIONAL-DIVIDER RATIO A3:A0 = 0011, D7:D0 A3:A0 = 0100, D13:D0 (hex) A3:A0 = 0011, D13:D12 (hex) 2412 160.8000 1010 0000 3333 00 2417 161.1333 1010 0001 0888 10 2422 161.4667 1010 0001 1DDD 11 2427 161.8000 1010 0001 3333 00 2432 162.1333 1010 0010 0888 10 2437 (default) 162.4667 1010 0010 1DDD 11 2442 162.8000 1010 0010 3333 00 2447 163.1333 1010 0011 0888 10 2452 163.4667 1010 0011 1DDD 11 2457 163.8000 1010 0011 3333 00 2462 164.1333 1010 0100 0888 10 2467 164.4667 1010 0100 1DDD 11 2472 164.8000 1010 0100 3333 00 2484 165.6000 1010 0101 2666 01 32 ______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs MAX2828/MAX2829 Table 12b. IEEE 802.11a Frequency Plan and Divider Ratio Programming Words fRF (MHz) (fRF X 4/5) / 20MHz (DIVIDER RATIO) INTEGER-DIVIDER RATIO FRACTIONAL-DIVIDER RATIO A3:A0 = 0011, D7:D0 A3:A0 = 0100, D13:D0 (hex) A3:A0 = 0011, D13:D12 (hex) 5180 207.2 1100 1111 0CCC 11 5200 208.0 1101 0000 0000 00 5220 208.8 1101 0000 3333 00 5240 209.6 1101 0001 2666 01 5260 210.4 1101 0010 1999 10 5280 211.2 1101 0011 0CCC 11 5300 212.0 1101 0100 0000 00 5320 212.8 1101 0100 3333 00 5500 220.0 1101 1100 0000 00 5520 220.8 1101 1100 3333 00 5540 221.6 1101 1101 2666 01 5560 222.4 1101 1110 1999 10 5580 223.2 1101 1111 0CCC 11 5600 224.0 1110 0000 0000 00 5620 224.8 1110 0000 3333 00 5640 225.6 1110 0001 2666 01 5660 226.4 1110 0010 1999 10 5680 227.2 1110 0011 0CCC 11 5700 228.0 1110 0100 0000 00 5745 229.8 1110 0101 3333 00 5765 230.6 1110 0110 2666 01 5785 231.4 1110 0111 1999 10 5805 232.2 1110 1000 0CCC 11 ______________________________________________________________________________________ 33 MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs Table 13. Band-Select and PLL Register (A3:A0 = 0101) DATA BIT D13 DEFAULT 0 D12 1 D11 1 DESCRIPTION Set to 0 for Normal Operation. Set to 1 for MIMO applications. Set D12:D11 = 11 D10 0 D9 0 D8 0 D7 0 D6 0 RF Frequency Band Select in 802.11a Mode (D0 = 1). 0: 4.9GHz to 5.35GHz Band; 1: 5.47GHz to 5.875GHz Band. D5 1 PLL Charge-Pump-Current Select. 0: 2mA; 1: 4mA. D4 0 Set to 0 D3 0 D2 1 D1 0 D0 0 These Bits Set the VCO Sub-Band when Programmed Using the SPI (D8 = 1). D10:D9 = 00: lowest frequency band; 11: highest frequency band. VCO SPI Bandswitch Enable. 0: disable SPI control, bandswitch is done by FSM; 1: bandswitch is done by SPI programming. VCO Bandswitch Enable. 0: disable; 1: start automatic bandswitch. These Bits Set the Reference-Divider Ratio. D3:D1 = 001 corresponds to R = 1 and 111 corresponds to R = 7. RF Frequency Band Select. 0: 2.4GHz Band; 1: 5GHz band. Band-Select and PLL Register Definition (A3:A0 = 0101) This register configures the programmable-reference frequency dividers for the synthesizers, and sets the DC current for the charge pump. The programmablereference frequency divider provides the reference frequencies to the phase detector by dividing the crystal oscillator frequency (see Table 13). Calibration Register Definition (A3:A0 = 0110) This register configures the Rx/Tx calibration modes (See Table 14). 34 Table 14. Calibration Register (A3:A0 = 0110) DATA BIT D13 DEFAULT 0 DESCRIPTION D12 1 D11 1 Transmitter I/Q Calibration LO Leakage and Sideband-Detector Gain-Control Bits. D12:D11 = 00: 8dB; 01: 18dB; 10: 24dB; 11: 34dB D10 1 Set to 1 D9 0 D8 0 D7 0 D6 0 D5 0 D4 0 D3 0 D2 0 Set to 0 Set to 0 D1 0 0: Tx Calibration Mode Disabled; 1: Tx Calibration Mode Enabled (Rx outputs provide the LO leakage and sideband-detector signal) D0 0 0: RX Calibration Mode Disabled; 1: Rx Calibration Mode Enabled ______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs MAX2828/MAX2829 Table 15. Lowpass-Filter Register (A3:A0 = 0111) DATA BIT DEFAULT D13 0 D12 0 D11 0 D10 0 D9 0 D8 0 D7 0 D6 0 D5 1 D4 0 D3 1 D2 0 D1 1 D0 0 DESCRIPTION Set to 0 RSSI High Bandwidth Enable. 0: 2MHz; 1: 6MHz Set to 0 Tx LPF Corner Frequency Coarse Adjustment. D6:D5 = 00: undefined; 01: 12MHz (nominal mode); 10: 18MHz (turbo mode 1); 11: 24MHz (turbo mode 2). Rx LPF Corner Frequency Coarse Adjustment. D4:D3 = 00: 7.5MHz; 01: 9.5MHz (nominal mode); 10: 14MHz (turbo mode 1); 11: 18MHz (turbo mode 2). Rx LPF Corner Frequency Fine Adjustment (Relative to the Course Setting). D2:D0 = 000: 90%; 001: 95%; 010: 100%; 011: 105%; 100: 110%. Lowpass Filter Register Definition (A3:A0 = 0111) This register allows the adjustment of the Rx and Tx lowpass filter corner frequencies (see Table 15). Rx Control/RSSI Register Definition (A3:A0 = 1000) This register allows the adjustment of the Rx section and the RSSI output (see Tables 16a and 16b). Table 16a. Rx Control/RSSI Register (A3:A0 = 1000) DATA BIT DEFAULT D13 0 Set to 0 DESCRIPTION D12 0 Enable Rx VGA Gain Programming Serially. 0: Rx VGA gain programmed with external digital inputs (B7:B1); 1: Rx VGA gain programmed with serial data bits in the Rx gain register (D6:D0). D11 0 RSSI Output Range. 0: low range (0.5V to 2V); 1: high range (0.5V to 2.5V). D10 0 RSSI Operating Mode. 0: RSSI disabled if RXHP = 0, and enabled if RXHP = 1; 1: RSSI enabled independent of RXHP (see Table 16c). D9 0 Set to 0 D8 0 RSSI Pin Function. 0: outputs RSSI signal in Rx mode; 1: outputs temperature sensor voltage in Rx, Tx, and standby modes (see Table 16c). D7 0 D6 0 D5 1 D4 0 D3 0 D2 1 D1 0 D0 1 Set to 0 Set to 1 Set to 0 Rx Highpass -3dB Corner Frequency when RXHP = 0. 0: 100Hz; 1: 30kHz Set D1:D0 = 01 ______________________________________________________________________________________ 35 MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs Table 16b. Rx HP -3dB Corner Frequency Adjustment RXHP A3:A0 = 1000, D2 Rx HP -3dB CORNER FREQUENCY 1 X 600kHz 0 1 30kHz 0 0 100Hz Table 16c. RSSI Pin Truth Table INPUT CONDITIONS RSSI OUTPUT A3:A0 = 1000, D8 A3:A0 = 1000, D10 RXENA RXHP 0 0 0 X No Signal 0 0 1 0 No Signal 0 0 1 1 RSSI No Signal 0 1 0 X 0 1 1 X RSSI 1 X X X Temperature Sensor Tx Linearity/Baseband Gain Register Definition (A3:A0 = 1001) This register allows the adjustment of the Tx gain and linearity (see Table 17). Table 17. Tx Linearity/Baseband Gain Register (A3:A0 = 1001) DATA BIT DEFAULT D13 0 D12 0 D11 0 D10 0 D9 1 D8 0 D7 0 D6 0 D5 0 D4 0 D3 0 D2 0 D1 0 D0 0 36 DESCRIPTION Set to 0 Enable Tx VGA Gain Programming Serially. 0: Tx VGA gain programmed with external digital inputs (B6:B1); 1: Tx VGA gain programmed with data bits in the Tx gain register (D5:D0). PA Driver Linearity. D9:D8 = 00: 50% current (minimum linearity); 01: 63% current; 10: 78% current; 11: 100% current (maximum linearity). Tx VGA Linearity. D7:D6 = 00: 50% current (minimum linearity); 01: 63% current; 10: 78% current; 11: 100% current (maximum linearity). Set to 0 Tx Upconverter Linearity. D3:D2 = 00: 50% current (minimum linearity); 01: 63% current; 10: 78% current; 11: 100% current (maximum linearity). Tx Baseband Gain. D1:D0 = 00: max baseband gain - 5dB; 01: max baseband gain - 3dB; 10: max baseband gain - 1.5dB; 11: max baseband gain. ______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs DATA BIT DEFAULT D13 0 D12 0 D11 0 D10 0 D9 1 D8 1 DATA BIT DEFAULT D13 0 D12 0 D11 0 D10 0 D9 0 D8 0 D7 0 D6 0 0 D5 0 D4 0 D4 0 D3 0 D3 0 D2 0 D1 0 D0 0 D7 1 D6 1 D5 D2 Set to 0 Sets PA bias DAC turn-on delay after TXENA is set high and A3:A0 = 0010, D10 = 1, in steps of 0.5µs. D9:D6 = 0001 corresponds to 0µs and 1111 corresponds to 7µs. Sets PA bias DAC output current in steps of 5µA. D5:D0 = 000000 corresponds to 0µA and 111111 corresponds to 315µA. 0 D1 0 D0 0 DESCRIPTION Table 20. Tx VGA Gain Register (A3:A0 = 1100) DEFAULT D13 0 D12 0 D11 0 D10 0 D9 0 D8 0 D7 0 D6 1 D5 1 D4 1 D3 1 D2 1 D1 1 D0 1 Not Used. For faster Tx VGA gain setting, only D5:D0 need to be programmed. Tx VGA Gain Control. D5 maps to digital input pin B6 and D0 maps to digital input pin B1. D5:D0 = 000000 corresponds to minimum gain. PA Bias DAC Register Definition (A3:A0 = 1010) This register controls the output current of the DAC, which biases the external PA (see Table 18). Table 19. Rx Gain Register (A3:A0 = 1011) DATA BIT DESCRIPTION DESCRIPTION Not Used. For faster Rx gain setting, only D6:D0 need to be programmed. Rx Gain Register Definition (A3:A0 = 1011) This register sets the Rx baseband and RF gain when A3:A0 = 1000, D12 = 1 (see Table 19). Tx VGA Gain Register Definition (A3:A0 = 1100) This register sets the Tx VGA gain when A3:A0 = 1001, D10 = 1 (see Table 20). Applications Information Rx LNA Gain Control Rx VGA Gain Control MIMO Applications Rx baseband and RF gain-control bits. D6 maps to digital input pin B7 and D0 maps to digital input pin B1. D6:D0 = 0000000 corresponds to minimum gain. The MAX2828/MAX2829 support multiple input multiple output (MIMO) applications where multiple transceivers are used in parallel. A special requirement for this application is that all receivers must maintain a constant relative local oscillator phase, and that they continue to do so after any receive-transmit-receive mode switching. The same requirement holds for the transmitters—they should all maintain a constant relative phase, and continue to do so after any transmit-receive-transmit mode switching. This feature is enabled in the MAX2828/MAX2829 by programming A3:A0 = 0010, D13 = 1 and A3:A0 = 0101, D13 = 1. The constant relative phases of the multiple transceivers are maintained in the transmit, receive, and standby modes of operation, as long as they are all using a common external reference frequency source (crystal oscillator). ______________________________________________________________________________________ 37 MAX2828/MAX2829 Table 18. PA Bias DAC Register (A3:A0 = 1010) Rx Gain Control Tx VGA Gain Control The receiver gain can be set either by the digital input pins B1 through B7 or by the internal Rx gain register. The gain-control characteristic is shown in the Typical Operating Characteristics. The Tx gain can be set either by digital input pins B1 through B6 or by the internal Tx VGA gain register. The linearity of the Tx blocks can also be adjusted (Table 17). The Tx VGA gain-control characteristic is shown in the Typical Operating Characteristics. RSSI The RSSI output can be configured for two output voltage ranges: 0.5V to 2V and 0.5V to 2.5V (see Table 16a). The RSSI output is unaffected by the Rx VGA gain setting. They are capable of driving loads up to 10kΩ || 5pF. Loop Filter The loop-filter topology and component values can be found in the MAX2828/MAX2829 evaluation kit data sheet. A 150kHz loop bandwidth is recommended to ensure that the loop settles fast enough during Tx/Rx turnaround times. Chip Information TRANSISTOR COUNT: 42,998 PROCESS: BiCMOS RXBBQ- RXBBQ+ RXBBI- RXBBI+ VCC B1 VCC B2 VCC B3 B4 VCC B5 TOP VIEW GND Pin Configurations (continued) 56 55 54 53 52 51 50 49 48 47 46 45 44 43 B6 1 42 RXHP VCC 2 41 RXENA B7 3 40 RSSI RXRFL 4 39 SHDN GND 5 38 VCC RXRFH 6 37 BYPASS GND 7 TXRFH+ 8 TXRFH- 9 34 GND VCC 10 33 CPOUT TXRFL+ 11 32 GND TXRFL- 12 31 VCC TXENA 13 30 ROSC PABIAS 14 29 LD 36 TUNE MAX2829 35 GND 38 CS SCLK DIN VCC GND VREF VCC RBIAS VCC TXBBQ- TXBBQ+ TXBBI- VCC 15 16 17 18 19 20 21 22 23 24 25 26 27 28 TXBBI+ MAX2828/MAX2829 Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs ______________________________________________________________________________________ Single-/Dual-Band 802.11a/b/g World-Band Transceiver ICs 56L THIN QFN.EPS Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 39 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX2828/MAX2829 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)