19-1524; Rev 2; 11/99 NUAL KIT MA ATION EET H S A EVALU T WS DA FOLLO 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers The devices are packaged in a 16-pin TSSOP with exposed pad (EP). For module or direct chip attach applications, the MAX2264 is also available in die form. Features ♦ Low Average CDMA Current Consumption in Typical Urban Scenario 55mA (MAX2264) 90mA (MAX2265) 40mA (MAX2266) ♦ 0.5µA Shutdown Mode Eliminates External Supply Switch ♦ ±0.8dB Gain Variation Over Temperature ♦ No External Reference or Logic Interface Circuitry Needed ♦ Supply Current and ACPR Margin Dynamically Adjustable ♦ +2.7V to +5V Single-Supply Operation ♦ 37% Efficiency at +2.7V Operation Ordering Information PART TEMP. RANGE PINPACKAGE MAX2264EUE -40°C to +85°C 16 TSSOP-EP MAX2264E/D MAX2265EUE MAX2266EUE -40°C to +85°C -40°C to +85°C -40°C to +85°C Dice* 16 TSSOP-EP 16 TSSOP-EP *Contact factory for dice specifications. Pin Configurations Applications Cellular-Band CDMA Dual-Mode Phones TSSOP-EP 5mm x 6.4mm TOP VIEW Cellular-Band PDC Phones MAX2264/MAX2266 Cellular-Band TDMA Dual-Mode Phones Dual-Mode Phones IN1 1 16 IN0 2-Way Pagers PWR 2 15 BIAS2H Power-Amplifier Modules VCC 3 14 VCC Selector Guide POWER-ADDED EFFICIENCY (%) DEVICE BIAS BIAS1H 4 12 NFP VCC 5 11 OUT0 SHDN 6 10 BIAS1L BIAS2L 7 CDMA AT +28dBm CDMA AT +16dBm MAX2264 32 12 — MAX2265 37 7 42 MAX2266 32 17 — TDMA AT +30dBm 13 GND OUT1 8 9 OUT1 TSSOP-EP Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. MAX2264/MAX2265/MAX2266 General Description The MAX2264/MAX2265/MAX2266 power amplifiers are designed for operation in IS-98-based CDMA, IS-136based TDMA, and PDC cellular telephones operating in the 900MHz range. When matched for CDMA operation and biased with margin over the adjacent and alternate channel specification (-45dBc/-56dBc), the amplifiers achieve 28dBm output power with 37% efficiency (MAX2265). At +16dBm output—a very common power level for CDMA phones—the MAX2265 still has 7% efficiency, yielding excellent overall talk time. At the same power level, the MAX2264/MAX2266 have an unprecedented 12%/17% efficiency, while still obtaining 32%/32% efficiency at maximum output power. The MAX2264/MAX2265/MAX2266 have internally referenced bias ports that are normally terminated with simple resistors. The bias ports allow customization of ACPR margin and gain. They can also be used to “throttle back” bias current when generating low power levels. The MAX2264/MAX2265/MAX2266 have excellent gain stability over temperature (±0.8dB), so overdesign of driver stages and excess driver current are dramatically reduced, further increasing the phone’s talk time. The devices can be operated from +2.7V to +5V while meeting all ACPR specifications over the entire temperature range. Nonlinear efficiency is 48% when matched for linear operation, or 55% when matched for non-linear-only operation (MAX2265). MAX2264/MAX2265/MAX2266 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers ABSOLUTE MAXIMUM RATINGS VCC to GND (no RF input) ....................................-0.3V to +6.5V Logic Inputs to GND...................................-0.3V to (VCC + 0.3V) BIAS_ _ to GND ..........................................-0.3V to (VCC + 0.3V) RF Input Power .................................................+13dBm (20mW) Logic Input Current...........................................................±10mA Output VSWR with +13dBm Input ........................................2.5:1 Total DC Power Dissipation (TPADDLE = +100°C) 16-Pin TSSOP-EP (derate 60mW/°C above TPADDLE = +100°C) ...............................................4W θJA ...............................................................................8°C/W Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................+300°C 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 (VCC = +2.7V to +5V, TA = TMIN to TMAX, no input signal applied, V SHDN = 2.0V. Typical values are at VCC = +3.3V and TA = +25°C, unless otherwise noted.) PARAMETER Operating Voltage Range Idle Current SYMBOL CONDITIONS ICC MIN TYP 2.7 VCC MAX2264/MAX2266 MAX 5.0 PWR = VCC 95 PWR = GND 34 SHDN = PWR = GND 10 µA Logic Input Current High Logic = VCC -1 5 µA Logic Input Current Low Logic = GND -1 1 µA Shutdown Supply Current ICC 0.5 V mA 83 MAX2265 UNITS 2.0 Logic Threshold High V 0.8 Logic Threshold Low V AC ELECTRICAL CHARACTERISTICS—MAX2264 (MAX2264 EV kit, VCC = VPWR = V SHDN = +3.3V, TA = +25°C, fIN = 836MHz, CDMA modulation, SHDN = VCC, matching networks tuned for 824MHz to 849MHz operation, 50Ω system, unless otherwise noted.) PARAMETER Frequency Range (Notes 1, 2) Power Gain (Note 1) SYMBOL fIN GP CONDITIONS TA = +25°C 23 TA = TMIN to TMAX 22 PWR = GND Gain Variation vs. Temperature (Note 1) Output Power (High-Power Mode) (Note 1) Output Power (Low-Power Mode) (Note 1) 2 18 TA = TMIN to TMAX, relative to TA = +25°C POUT POUT TYP 824 PWR = VCC or GND PWR = VCC MIN MAX UNITS 849 MHz 24.5 dB 21 ±0.8 PWR = VCC, PIN adjusted to meet ACPR specification, fIN = 824MHz to 849MHz 27 PWR = VCC = 2.8V, PIN adjusted to meet ACPR specification, fIN = 824MHz to 849MHz 26 27 PWR = GND, PIN adjusted to meet ACPR specification, fIN = 824MHz to 849MHz 15 16.5 PWR = GND, VCC = 2.8V, PIN adjusted to meet ACPR specification, fIN = 824MHz to 849MHz 14 15.5 dB 28 dBm dBm _______________________________________________________________________________________ 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers (MAX2264 EV kit, VCC = VPWR = V SHDN = +3.3V, TA = +25°C, fIN = 836MHz, CDMA modulation, SHDN = VCC, matching networks tuned for 824MHz to 849MHz operation, 50Ω system, unless otherwise noted.) MIN TYP AMPS Output Power (Note 1) PARAMETER SYMBOL POUT PIN = 8dBm CONDITIONS 30.5 31 Adjacent-Channel Power Ratio Limit (Notes 1, 2) ACPR VCC = 2.8V to 5.0V, offset = 885kHz, 30kHz BW, fIN = 824MHz to 849MHz -44 dBc Alternate-Channel Power Ratio Limit (Notes 1, 2) ACPR VCC = 2.8V to 5.0V, offset = 1980kHz, 30kHz BW, fIN = 824MHz to 849MHz -56 dBc PWR = VCC, PIN adjusted to meet ACPR specification 32 PWR = GND, PIN adjusted to meet ACPR specification 12 PIN = 8dBm 44 Power-Mode Switching Time (Note 4) 550 Turn-On Time (Notes 1, 4) PWR = VCC or GND Power-Added Efficiency (Note 3) AMPS Power-Added Efficiency Maximum Input VSWR MAX dBm PAE PAE VSWR Nonharmonic Spurious due to Load Mismatch (Notes 1, 5) UNITS % 1 fIN = 824MHz to 849MHz, PWR = GND or VCC % ns 5 µs -60 dBc 2.4:1 PIN = 10dBm Measured at 881MHz -139 PWR = GND, measured at 881MHz -136 AMPS Noise Power (Note 6) Measured at 881MHz, PIN = 8dBm -138 dBm/Hz Harmonic Suppression (Note 7) 32 dBc Noise Power (Note 6) dBm/Hz AC ELECTRICAL CHARACTERISTICS—MAX2265 (MAX2265 EV kit, VCC = V SHDN = +3.3V, TA = +25°C, fIN = 836MHz, CDMA modulation, matching networks tuned for 824MHz to 849MHz operation, 50Ω system, unless otherwise indicated.) PARAMETER Frequency Range (Notes 1, 2) Power Gain (Note 1) SYMBOL GP Gain Variation vs. Temperature (Note 1) Output Power (Note 1) CONDITIONS MIN TA = +25°C 24 TA = TMIN to TMAX 23 TA = TMIN to TMAX, relative to TA = +25°C POUT TYP 824 fIN 25.5 ±0.7 PIN adjusted to meet ACPR specification, fIN = 824MHz to 849MHz 27 28 VCC = 2.8V, PIN adjusted to meet ACPR specification, fIN = 824MHz to 849MHz 26 26.5 MAX UNITS 849 MHz dB dB dBm AMPS Output Power (Note 1) POUT PIN = 8dBm 30 31 dBm Adjacent-Channel Power Ratio (Notes 1, 2) ACPR VCC = 2.8V to 5.0V, offset = 885kHz, 30kHz BW, fIN = 824MHz to 849MHz -44 -45 dBc Alternate-Channel Power Ratio (Notes 1, 2) ACPR VCC = 2.8V to 5.0V, offset = 1980kHz, 30kHz BW, fIN = 824MHz to 849MHz -56 -57 dBc _______________________________________________________________________________________ 3 MAX2264/MAX2265/MAX2266 AC ELECTRICAL CHARACTERISTICS—MAX2264 (continued) MAX2264/MAX2265/MAX2266 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers AC ELECTRICAL CHARACTERISTICS—MAX2265 (continued) (MAX2265 EV kit, VCC = V SHDN = +3.3V, TA = +25°C, fIN = 836MHz, CDMA modulation, matching networks tuned for 824MHz to 849MHz operation, 50Ω system, unless otherwise indicated.) PARAMETER SYMBOL Power-Added Efficiency (Note 3) PAE AMPS Power-Added Efficiency PAE CONDITIONS MIN 37 PIN adjusted for POUT = 16dBm 7 PIN = 8dBm 48 Turn-On Time (Notes 1, 4) Maximum Input VSWR TYP PIN adjusted to give POUT = 28dBm 1 VSWR fIN = 824MHz to 849MHz MAX UNITS % % 5 µs -60 dBc 1.3:1 Nonharmonic Spurious Due to Load Mismatch (Notes 1, 5) PIN = 10dBm Noise Power (Note 6) Measured at 881MHz -140 dBm/Hz AMPS Noise Power (Note 6) Measured at 881MHz, PIN = 8dBm -139 dBm/Hz Harmonic Suppression (Note 7) 47 dBc AC ELECTRICAL CHARACTERISTICS—MAX2266 (MAX2266 EV kit, VCC = V SHDN = +3.3V, TA = +25°C, fIN = 836MHz, CDMA modulation, matching networks tuned for 824MHz to 849MHz operation, 50Ω system, unless otherwise indicated.) PARAMETER Frequency Range (Notes 1, 2) Power Gain (Note 1) SYMBOL fIN GP CONDITIONS TA = +25°C TA = TMIN to TMAX PWR = GND Gain Variation vs. Temperature (Note 1) Output Power (High-Power Mode) (Note 1) Output Power (Low-Power Mode) (Note 1) 24.5 25 POUT MAX UNITS 849 MHz 26 23 TA = TMIN to TMAX, relative to TA = +25°C POUT TYP 824 PWR = VCC or GND PWR = VCC MIN dB 27.5 ±0.8 PWR = VCC, PIN adjusted to meet ACPR specification, fIN = 824MHz to 849MHz 27 PWR = VCC = 2.8V, PIN adjusted to meet ACPR specification, fIN = 824MHz to 849MHz 26 27 PWR = GND, PIN adjusted to meet ACPR specification, fIN = 824MHz to 849MHz 14 15.5 PWR = GND, VCC = 2.8V, PIN adjusted to meet ACPR specification, fIN = 824MHz to 849MHz 13 14 32 dB 28 dBm dBm AMPS Output Power (Note 1) POUT PIN = 8dBm 31 Adjacent-Channel Power Ratio Limit (Notes 1, 2) ACPR VCC = 2.8V to 5.0V, offset = 885kHz, 30kHz BW, fIN = 824MHz to 849MHz -44 dBc Alternate-Channel Power Ratio Limit (Notes 1, 2) ACPR VCC = 2.8V to 5.0V, offset = 1980kHz, 30kHz BW, fIN = 824MHz to 849MHz -56 dBc Power-Added Efficiency (Note 3) 4 PWR = VCC, PIN adjusted to meet ACPR specification dBm 32 PAE % PWR = GND, PIN adjusted to meet ACPR specification 17 _______________________________________________________________________________________ 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers (MAX2266 EV kit, VCC = VPWR = V SHDN = +3.3V, TA = +25°C, fIN = 836MHz, CDMA modulation, SHDN = VCC, matching networks tuned for 824MHz to 849MHz operation, 50Ω system, unless otherwise noted.) PARAMETER SYMBOL AMPS Power-Added Efficiency PAE CONDITIONS MIN TYP MAX UNITS PIN = 8dBm 48 % Power-Mode Switching Time (Note 4) 550 ns Turn-On Time (Notes 1, 4) PWR = VCC or GND Maximum Input VSWR VSWR Nonharmonic Spurious due to Load Mismatch (Notes 1, 5) 1 fIN = 824MHz to 849MHz, PWR = GND or VCC 5 µs -60 dBc 2.4:1 PIN = 10dBm Measured at 881MHz -137 PWR = GND, measured at 881MHz -130 AMPS Noise Power (Note 6) Measured at 881MHz, PIN = 8dBm -136 dBm/Hz Harmonic Suppression (Note 7) 32 dBc Noise Power (Note 6) dBm/Hz Note 1: Minimum and maximum values are guaranteed by design and characterization, not production tested. Note 2: PMAX is met over this frequency range at the ACPR limit with a single matching network. For optimum performance at other frequencies, the output matching network must be properly designed. See the Applications Information section. Operation between 750MHz and 1000MHz is possible but has not been characterized. Note 3: PAE is specified into a 50Ω load, while meeting ACPR requirements. Note 4: Time from logic transition until POUT is within 1dB of its final mean power. Note 5: Murata isolator as load with 20:1 VSWR any phase angle after isolator. Note 6: Noise power can be improved by using the circuit in Figures 1, 2, and 3. Note 7: Harmonics measured on evaluation kit, which provides some harmonic attenuation in addition to the rejection provided by the IC. The combined suppression is specified. Typical Operating Characteristics (MAX2264/MAX2265/MAX2266 EV kits, VCC = +3.3V, SHDN = VCC, CDMA modulation, TA = +25°C, unless otherwise noted.) 28 MAX2264-03 TA = -40°C PWR = GND 28 26 26 24 100 80 60 GAIN (dB) TA = -40°C TA = +85°C GAIN (dB) SUPPLY CURRENT (nA) PWR = VCC MAX2264-02 PWR = GND SHDN = GND NO INPUT DRIVE 120 30 MAX2264-01 140 MAX2264 GAIN vs. SUPPLY VOLTAGE MAX2264 GAIN vs. SUPPLY VOLTAGE MAX2264 SHUTDOWN CURRENT vs. SUPPLY VOLTAGE 24 22 TA = +85°C TA = +25°C TA = +25°C 40 TA = +25°C 20 22 20 TA = +85°C TA = -40°C 18 20 0 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE (V) 5.0 5.5 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) 4.5 5.0 2.5 3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE (V) _______________________________________________________________________________________ 5 MAX2264/MAX2265/MAX2266 AC ELECTRICAL CHARACTERISTICS—MAX2266 (continued) Typical Operating Characteristics (continued) (MAX2264/MAX2265/MAX2266 EV kits, VCC = +3.3V, SHDN = VCC, CDMA modulation, TA = +25°C, unless otherwise noted.) MAX2264 POWER-ADDED EFFICIENCY vs. SUPPLY VOLTAGE 14 TA = -40°C PWR = GND 13 34 TA = +25°C TA = +85°C 30 PAE (%) TA = +25°C 11 10 28 TA = +85°C 9 26 3.0 3.5 4.0 4.5 5.0 VCC = 2.7V TA = -40°C 28 VCC = 2.7V TA = +25°C 27 VCC = 2.7V TA = +85°C 25 2.5 3.5 3.0 4.0 4.5 2 0 5.0 4 8 INPUT POWER (dBm) MAX2264 OUTPUT POWER vs. INPUT POWER MAX2264 GAIN vs. OUTPUT POWER MAX2264 GAIN vs. OUTPUT POWER PWR = VCC VCC = 2.7V TA = -40°C 26 VCC = 3.3V TA = -40°C 25 MAX2264-09 27 MAX2264-07 TA = -40°C 16 PWR = GND 24 TA = -40°C TA = +85°C 12 8 25 GAIN (dB) GAIN (dB) TA = +25°C VCC = 3.3V TA = +85°C 24 VCC = 3.3V VCC = 2.7V TA = +25°C TA = +85°C VCC = 2.7V TA = +25°C 23 -10 -12 -8 -6 -4 22 TA = +25°C TA = +85°C 20 0 -2 23 21 22 4 -14 6 SUPPLY VOLTAGE (V) PWR = GND 10 5 15 20 25 30 -10 35 0 -5 5 10 15 INPUT POWER (dBm) OUTPUT POWER (dBm) OUTPUT POWER (dBm) MAX2264 SUPPLY CURRENT vs. OUTPUT POWER MAX2264 SUPPLY CURRENT vs. OUTPUT POWER MAX2264 ADJACENT-CHANNEL POWER RATIO vs. OUTPUT POWER VCC = 2.7V/3.3V AT TA = -40°C/+25°C/+85°C TA = +85°C 80 TA = +25°C TA = -40°C 0 5 10 15 20 25 OUTPUT POWER (dBm) 30 35 MAX2264-12 PWR = VCC TA = +85°C -50 TA = +25°C -60 TA = -40°C -70 -80 0 0 20 120 40 200 -30 -40 SUPPLY CURRENT (mA) 600 PWR = GND ACPR (dBc) PWR = VCC 400 160 MAX2264-10 800 MAX2264-11 OUTPUT POWER (dBm) VCC = 3.3V TA = -40°C 29 SUPPLY VOLTAGE (V) 20 6 VCC = 3.3V TA = +25°C 30 26 8 2.5 VCC = 3.3V TA = +85°C PWR = VCC 31 MAX2264-08 PAE (%) 12 32 32 OUTPUT POWER (dBm) TA = -40°C MAX2264-05 PWR = VCC MAX2264-04 36 MAX2264 OUTPUT POWER vs. INPUT POWER MAX2264-06 MAX2264 POWER-ADDED EFFICIENCY vs. SUPPLY VOLTAGE SUPPLY CURRENT (mA) MAX2264/MAX2265/MAX2266 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers 0 3 6 9 12 OUTPUT POWER (dBm) 15 18 -20 -10 0 10 OUTPUT POWER (dBm) _______________________________________________________________________________________ 20 30 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers TA = +85°C PWR = VCC TA = TMIN TO TMAX 45 -45 16 PWR = GND TA = +85°C 12 40 PAE (%) TA = -40°C TA = +25°C VCC = 2.7V 35 PAE (%) ACPR (dBc) TA = +25°C -50 30 25 -55 20 -60 10 -65 0 MAX2264-15 PWR = GND MAX2264-14 55 50 MAX2264-13 -40 MAX2264 POWER-ADDED EFFICIENCY vs. OUTPUT POWER MAX2264 POWER-ADDED EFFICIENCY vs. OUTPUT POWER MAX2264 ADJACENT-CHANNEL POWER RATIO vs. OUTPUT POWER 15 TA = -40°C 8 4 VCC = 3.3V 5 -5 0 5 10 15 0 5 0 20 10 15 25 20 30 35 0 -5 5 10 15 OUTPUT POWER (dBm) MAX2264 POWER-ADDED EFFICIENCY vs. FREQUENCY MAX2264 POWER-ADDED EFFICIENCY vs. FREQUENCY MAX2265 SHUTDOWN CURRENT vs. SUPPLY VOLTAGE PWR = GND POUT = 16dBm 38 12% 11% 12% 12% 11% 10 PAE (%) 36 34 33.2% 32.7% 33.1% 5 33.0% 140 PWR = GND SHDN = GND NO INPUT DRIVE 120 SUPPLY CURRENT (nA) 15 MAX2264-16 PWR = VCC POUT = 28dBm 20 MAX2265-18 OUTPUT POWER (dBm) 40 PAE (%) -10 OUTPUT POWER (dBm) MAX2264-17 -10 100 TA = +85°C 80 60 TA = +25°C 40 32.0% 32 20 TA = -40°C 824 830 836 842 824 848 830 836 842 2.5 848 3.0 3.5 4.0 4.5 FREQUENCY (MHz) FREQUENCY (MHz) SUPPLY VOLTAGE (V) MAX2265 GAIN vs. SUPPLY VOLTAGE MAX2265 POWER-ADDED EFFICIENCY vs. SUPPLY VOLTAGE MAX2265 OUTPUT POWER vs. INPUT POWER PAE (%) TA = +85°C 35 TA = +25°C TA = +85°C OUTPUT POWER (dBm) TA = +25°C VCC = 3.3V TA = +85°C 31 TA = -40°C 33 5.5 VCC = 3.3V TA = +25°C 37 26 24 32 MAX2265-20 TA = -40°C 28 39 MAX2265-19 30 5.0 MAX2265-21 30 GAIN (dB) 0 0 30 VCC = 3.3V TA = -40°C 29 VCC = 2.7V TA = -40°C 28 VCC = 2.7V TA = +25°C 27 31 22 VCC = 2.7V TA = +85°C 26 29 20 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) 4.5 5.0 25 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) 4.5 5.0 0 2 4 6 8 INPUT POWER (dBm) _______________________________________________________________________________________ 7 MAX2264/MAX2265/MAX2266 Typical Operating Characteristics (continued) (MAX2264/MAX2265/MAX2266 EV kits, VCC = +3.3V, SHDN = VCC, CDMA modulation, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (MAX2264/MAX2265/MAX2266 EV kits, VCC = +3.3V, SHDN = VCC, CDMA modulation, TA = +25°C, unless otherwise noted.) VCC = 3.3V TA = +85°C VCC = 3.3V VCC = 2.7V TA = +25°C TA = +85°C VCC = 2.7V TA = +25°C 23 15 20 30 25 TA = +25°C -60 TA = -40°C -70 -80 0 35 10 5 15 20 25 30 -20 35 -10 0 10 20 OUTPUT POWER (dBm) OUTPUT POWER (dBm) OUTPUT POWER (dBm) MAX2265 POWER-ADDED EFFICIENCY vs. OUTPUT POWER MAX2265 POWER-ADDED EFFICIENCY vs. FREQUENCY MAX2265 TDMA POWER SPECTRUM VCC = 3.3V TA = +85°C VCC = 3.3V TA = -40°C 25 MAX2265-26 36.75% 36.58% 36.74% 10 36.38% 36 34 20 30 20 36.50% PAE (%) 30 30 38 VCC = 2.7V TA = +85°C 35 40 POWER (dBm) 40 40 MAX2265-25 VCC = 2.7V TA = -40°C VCC = 2.7V TA = +25°C 45 0 -10 -20 -30 15 VCC = 3.3V TA = +25°C 10 -40 32 5 -50 0 10 15 20 25 30 35 -60 826 831 OUTPUT POWER (dBm) 841 CENTER 836MHz 15.2805kHz/div SPAN 152.805kHz 846 FREQUENCY (MHz) 30 MAX2266-01 140 PWR = GND SHDN = GND NO INPUT DRIVE MAX2266 GAIN vs. SUPPLY VOLTAGE MAX2266 GAIN vs. SUPPLY VOLTAGE MAX2266 SHUTDOWN CURRENT vs. SUPPLY VOLTAGE 120 836 PWR = VCC 34 TA = -40°C 28 MAX2266 toc03 5 30 MAX2266 toc02 0 PWR = GND PIN = SET FOR ACPR LIMIT 32 100 60 26 GAIN (dB) GAIN (dB) TA = +85°C 80 TA = +85°C 24 TA = +25°C TA = -40°C 30 28 TA = +25°C 40 26 22 20 24 20 0 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE (V) 5.0 TA = +85°C TA = +25°C TA = -40°C 8 MAX2265-24 -50 USING OPTIONAL TB CIRCUIT IN FIGURE 2 0 10 5 55 50 PAE (%) VCC = 2.7V/3.3V AT TA = -40°C/+25°C/+85°C 400 200 22 0 TA = +85°C -40 600 MAX2265-27 24 VCC = 3.3V ACPR (dBc) 25 -30 MAX2265-23 VCC = 3.3V TA = -40°C SUPPLY CURRENT (mA) GAIN (dB) 26 800 MAX2265-22 27 VCC = 2.7V TA = -40°C MAX2265 ADJACENT-CHANNEL POWER RATIO vs. OUTPUT POWER MAX2265 SUPPLY CURRENT vs. OUTPUT POWER MAX2265 GAIN vs. OUTPUT POWER SUPPLY CURRENT (nA) MAX2264/MAX2265/MAX2266 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers 5.5 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) 4.5 5.0 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) _______________________________________________________________________________________ 4.5 5.0 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers MAX2266 POWER-ADDED EFFICIENCY vs. SUPPLY VOLTAGE OUTPUT POWER (dBm) PAE (%) TA = +85°C TA = +25°C 16 TA = +25°C 26 2.5 3.0 VCC = 3.3V TA = +25°C 30 VCC = 3.3V TA = -40°C 29 28 VCC = 2.7V TA = -40°C 27 3.5 4.0 4.5 26 14 25 2.5 5.0 VCC = 2.7V TA = +25°C 3.0 3.5 4.0 0 5.0 1 2 3 4 5 6 7 INPUT POWER (dBm) MAX2266 OUTPUT POWER vs. INPUT POWER MAX2266 GAIN vs. OUTPUT POWER MAX2266 GAIN vs. OUTPUT POWER TA = -40°C 27 PWR = VCC 26 TA = +85°C 25 24 23 -10 -8 -6 -4 -2 0 5 10 15 20 TA = -40°C 28 TA = +25°C 27 26 VCC = 3.3V VCC = 2.7V TA = +25°C TA = +25°C 22 -12 PWR = GND TA = +85°C 25 25 30 35 -10 -5 0 5 10 15 INPUT POWER (dBm) OUTPUT POWER (dBm) OUTPUT POWER (dBm) MAX2266 SUPPLY CURRENT vs. OUTPUT POWER MAX2266 SUPPLY CURRENT vs. OUTPUT POWER MAX2266 ADJACENT-CHANNEL POWER RATIO vs. OUTPUT POWER VCC = 2.7V/3.3V AT TA = -40°C/+25°C/+85°C 200 0 PWR = GND TA = +85°C TA = +25°C 80 40 TA = -40°C 5 10 15 20 25 OUTPUT POWER (dBm) 30 35 TA = +25°C TA = +85°C -50 TA = -40°C -60 -70 -80 0 0 20 PWR = VCC -40 120 ACPR (dBc) SUPPLY CURRENT (mA) 600 -30 MAX2266 toc11 PWR = VCC 400 160 MAX2266 toc10 800 8 29 VCC = 3.3V TA = +85°C VCC = 2.7V TA = +85°C 12 8 30 GAIN (dB) GAIN (dB) 16 VCC = 3.3V TA = -40°C VCC = 2.7V TA = -40°C TA = +25°C -14 4.5 VCC = 2.7V TA = +85°C SUPPLY VOLTAGE (V) PWR = GND 20 15 SUPPLY VOLTAGE (V) MAX2266 toc07 24 SUPPLY CURRENT (mA) VCC = 3.3V TA = +85°C TA = +85°C 28 OUTPUT POWER (dBm) 17 MAX2266 toc08 PAE (%) 18 30 PWR = VCC 31 MAX2266 toc06 19 TA = -40°C 32 32 MAX2266 toc09 TA = -40°C PWR = GND MAX2266 toc12 PWR = VCC 34 20 MAX2266 toc04 36 MAX2266 OUTPUT POWER vs. INPUT POWER MAX2266 toc05 MAX2266 POWER-ADDED EFFICIENCY vs. SUPPLY VOLTAGE 0 3 6 9 12 OUTPUT POWER (dBm) 15 18 -20 -10 0 10 20 30 OUTPUT POWER (dBm) _______________________________________________________________________________________ 9 MAX2264/MAX2265/MAX2266 Typical Operating Characteristics (continued) (MAX2264/MAX2265/MAX2266 EV kits, VCC = +3.3V, SHDN = VCC, CDMA modulation, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (MAX2264/MAX2265/MAX2266 EV kits, VCC = +3.3V, SHDN = VCC, CDMA modulation, TA = +25°C, unless otherwise noted.) PWR = GND -40 PWR = VCC 50 45 TA = +85°C 20 MAX2266 toc14 55 MAX2266 toc13 40 PWR = GND TA = +25°C 15 VCC = 2.7V TA = -40°C 35 PAE (%) -50 -60 TA = +25°C PAE (%) -30 MAX2266 POWER-ADDED EFFICIENCY vs. OUTPUT POWER MAX2266 POWER-ADDED EFFICIENCY vs. OUTPUT POWER 30 25 15 5 0 -80 0 TA = +85°C 5 VCC = 3.3V 10 TA = -40°C -5 10 20 -70 -10 5 10 15 20 0 0 5 10 15 20 25 30 -10 35 -5 MAX2266 POWER-ADDED EFFICIENCY vs. FREQUENCY PWR = VCC POUT = 28dBm 25 36 MAX2266 toc17 MAX2266 POWER-ADDED EFFICIENCY vs. FREQUENCY MAX2266 toc16 38 0 PWR = GND POUT = 16dBm 32 31.3% 31.6% 31.9% 32.2% 32.4% PAE (%) PAE (%) 20 34 17.6% 17.4% 17.3% 17.0% 16.9% 824 830 836 842 848 15 10 30 28 5 824 830 836 842 FREQUENCY (MHz) 848 5 10 OUTPUT POWER (dBm) OUTPUT POWER (dBm) 10 MAX2266 toc15 MAX2266 ADJACENT-CHANNEL POWER RATIO vs. OUTPUT POWER ACPR (dBc) MAX2264/MAX2265/MAX2266 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers FREQUENCY (MHz) ______________________________________________________________________________________ 15 20 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers PIN NAME FUNCTION MAX2264 MAX2266 MAX2265 1 1 IN1 2 — PWR Mode-Select Input. Drive low to select the low-power mode (BIAS1L and BIAS2L). Drive high to select high-power mode (BIAS1H and BIAS2H). 3, 5, 14 3, 5 VCC Voltage Supply. Bypass with capacitors connected between this pin and GND. 4 4 BIAS1H 6 2, 6 SHDN Shutdown Control Input. Drive SHDN low to enable shutdown. Drive high for normal operation. On the MAX2265, make sure that both pins get driven simultaneously. To place the MAX2264/MAX2266 into shutdown mode, also pull the PWR pin low. 7 — BIAS2L Low-Power Mode Second Stage Bias Control. See General Description. 8, 9 8, 9 OUT1 10 — BIAS1L 11 — OUT0 12 12 NFP Noise Filtering Pin. Connect noise filtering network as described in Noise Filtering section. If unused, leave open. — 7, 10, 11, 14, 16 N.C. Not Internally Connected. Do not make any connections to these pins. 13, Slug 13, Slug GND Ground. Solder the package slug to high-thermal-conductivity circuit board ground plane. 15 15 BIAS2H 16 — IN0 RF Input Port. Requires external matching network. High-Power Mode First Stage Bias Control. See General Description. RF Output Ports. Require an appropriate output matching network and collector bias. Low-Power Mode First Stage Bias Control. See General Description. RF Output Port. Requires an appropriate output matching network and collector bias. High-Power Mode Second Stage Bias Control. See General Description. RF Input Port. Requires external matching network. Detailed Description The MAX2264/MAX2265/MAX2266 are linear power amplifiers (PAs) intended for CDMA and TDMA applications. The devices have been fully characterized in the 824MHz to 849MHz U.S. cellular band and can be used from 750MHz to 1000MHz by adjusting the input and output match. In CDMA applications, they provide typically 28dBm of output power and up to 37% poweradded efficiency (PAE) from a single +2.7V to +5V supply. In TDMA applications, efficiency is 42% at 30dBm of output power. An inherent drawback of traditional PAs is that their efficiency drops rapidly with reduced output power. For example, in a PA designed for maximum efficiency at +28dBm, the efficiency at +15dBm falls well below 4.5% (over 210mA from a +3.3V supply). This behavior significantly reduces talk time in CDMA phones because over 90% of the time they are at output powers below +16dBm. The MAX2264/MAX2265/MAX2266 are optimized for lowest current draw at output powers that are most likely to occur in real-life situations. This provides up to 50% reduced average PA current. High-Power and Low-Power Modes The MAX2264/MAX2266 are designed to provide optimum PAE in both high- and low-power modes. For a +3.3V supply, maximum output power is +28dBm in high-power mode and +16dBm in low-power mode. Use the system’s microcontroller to determine required output power, and switch between the two modes as appropriate with the PWR logic pin. Bias Control The bias current of the first stage in low-power mode is proportional to the current flowing out of BIAS1L. The voltage at BIAS1L is fixed by an internal bandgap refer- ______________________________________________________________________________________ 11 MAX2264/MAX2265/MAX2266 Pin Description MAX2264/MAX2265/MAX2266 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers ence, so the current out of this pin is inversely proportional to the value of the resistor between this pin and ground. Similarly, the bias current of the first stage in high-power mode is proportional to the current flowing out of BIAS1H. The current in the second stage is proportional to the currents out of BIAS2L and BIAS2H for low- and high-power modes, respectively. Additionally, these resistors allow for customization of gain and alternate- and adjacent-channel power ratios. Increasing the bias current in the first stage increases the gain and improves alternate-channel power ratio at the expense of efficiency. Increasing the bias current in the second stage increases gain at the expense of efficiency as well as adjacent- and alternate-channel power ratios. The PA bias current can be dynamically adjusted by summing a current into the bias pin of interest with an external source such as a DAC. See the MAX2265 Typical Application Circuit for using a voltage DAC and current setting resistors RTB1 and RTB2. Choosing RTB1 = R1 and RTB2 = R2 allows current adjustment between 0mA to double the nominal idle current with DAC voltages between 0V and 2.4V. The DAC must be able to source approximately 100µA. Shutdown Mode Pull pins 2 and 6 low to place the MAX2264/MAX2265/ MAX2266 into shutdown mode. In this mode, all gain stages are disabled and supply current drops to 0.5µA. Increasing Efficiency Further The MAX2266 incorporates an additional external switch to increase efficiency to 17% at +16dBm and to 32% at +28dBm. This efficiency increase is mainly due to the additional isolation between the high- and lowpower outputs provided by the external switch. Applications Information External Components The MAX2264/MAX2265/MAX2266 require matching circuits at their inputs and outputs for operation in a 50Ω system. The application circuits in Figures 1, 2, and 3 describe the topology of the matching circuits for RFIN C2 L2 L1 C1 MAX2264 L3 C3 PWR C11 VCC SHDN RL2 16 2 15 3 14 4 BIAS RH1 C12 VCC 1 13 5 12 6 11 7 10 8 9 VCC RH2 VCC C13 OPTIONAL NOISE-REDUCTION CIRCUIT L6 C6 L5 RL1 L4 C8 C9 C4 C7 RFOUT Figure 1. MAX2264 Typical Application Circuit 12 ______________________________________________________________________________________ VCC C5 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers Layout and Power-Supply Bypassing A properly designed PC board is essential to any RF/microwave circuit. Be sure to use controlled impedance lines on all high-frequency inputs and outputs. Proper grounding of the GND pins is fundamental; if the PC board uses a topside RF ground, connect all GND pins (especially the TSSOP package exposed GND pad) directly to it. On boards where the ground plane is not on the component side, it’s best to connect all GND pins to the ground plane with plated through-holes close to the package. RFIN OPTIONAL TB CIRCUIT TX POWER L1 RTB2 C1 RTB1 MAX2265 L3 C3 C11 VCC 16 2 15 3 14 4 13 BIAS R1 1 C12 VCC 5 SHDN 6 11 7 10 8 9 R2 12 C13 L7 OPTIONAL NOISE-REDUCTION CIRCUIT VCC L4 C9 C4 L6 C7 RFOUT C6 Figure 2. MAX2265 Typical Application Circuit ______________________________________________________________________________________ 13 MAX2264/MAX2265/MAX2266 To minimize coupling between different sections of the system, the ideal power-supply layout is a star configuration with a large decoupling capacitor at a central VCC node. The VCC traces branch out from this central node, each leading to a separate VCC node on the PC board. A second bypass capacitor with low ESR at the RF frequency of operation is located at the end of each trace. This arrangement provides local decoupling at the VCC pin. Input and output impedance-matching networks are very sensitive to layout-related parasitics. It is important to keep all matching components as close to the IC as possible to minimize the effects of stray inductance and stray capacitance of PC board traces. each device; suggested component values, suppliers, and part numbers are listed in Table 1. These values are optimized for best simultaneous efficiency and return loss performance. Use high-quality components in these matching circuits for greatest efficiency. MAX2264/MAX2265/MAX2266 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers Noise Filtering For improved noise performance, the MAX2264/ MAX2265/MAX2266 allow for additional noise filtering for further suppression of transmit noise. This is achieved by using C6 and L6 on the MAX2264, C13 and L7 on the MAX2265, and C6 and L6 on the MAX2266. Use the recommended component values for optimal noise power (Table 1). RFIN C2 L1 C1 L2 MAX2266 L3 C3 PWR C11 VCC 16 2 15 3 14 4 BIAS RH1 1 VCC C13 13 C12 VCC 5 12 SHDN 6 11 7 10 8 9 RL2 RH2 L6 C6 OPTIONAL NOISEREDUCTION CIRCUIT RL1 VCC L5 VCC C5 L4 C4 VCC U1 UPG152TA 2 C7 R1 3 6 PWR 4 5 C9 C8 Q1 OPTIONAL RFOUT Figure 3. MAX2266 Typical Application Circuit 14 ______________________________________________________________________________________ 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers Chip Information TRANSISTOR COUNT: 1256 TOP VIEW MAX2265 IN1 1 16 N.C. SHDN 2 15 BIAS2H 14 N.C. 3 4 VCC BIAS VCC BIAS1H 13 GND 5 12 NFP SHDN 6 11 N.C. N.C. 7 10 N.C. OUT1 9 OUT1 8 TSSOP-EP ______________________________________________________________________________________ 15 MAX2264/MAX2265/MAX2266 Pin Configurations (continued) MAX2264/MAX2265/MAX2266 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers NOTES 16 ______________________________________________________________________________________