BT1074Bi 850-950MHz RF TRANSCEIVER SINGLE CHIP 850-950MHz RF TRANSCEIVER RX_EN 49 MIXERINP GNDRX_BUF 52 MIXOUTP 51 MIXOUTN 50 VDDRX_BUF 54 53 RMX_OUTN GND_IF 55 VCO2_IN 56 RMX_OUTP 58 57 VDD_DMX VDD_IF GND_DMX2 GND_DMX1 61 59 VDDLNA1 62 60 VDDLNA2 64 47 RF_VCO_EN VDDRFVCOIN 3 46 RFVCOCAPIN RF_INP 4 45 RF_VCO_CTRL GNDLNA1P 5 VDDPA_GR 6 44 GNDRFVCOIN RF_VCO_OUT GND_PA1 7 RF_OUTN 8 43 GND_PA2 9 RF_OUTP 10 GND_PA3 11 REXT2 GND_PRE1 REXT1 GND_PRE2 BT1074Bi GNDRF_VCO VDDRF_VCO 40 VDDIF_VCO 39 GNDIF_VCO IF_VCO_OUT GNDIFBUF 36 IFCAPIN 38 12 37 13 14 35 IF_VCO_CTRL GND_IFVCOIN 33 IF_VCO_GND 34 15 VDD_IFVCOIN 32 TXQ 30 VDD_TXIF 31 TXI 28 M_REF 29 GND_TXIF2 27 GND_TXIF1 26 TX_P_CNT 24 TX_EN 25 GND_UPC2 23 VDD_UPC 21 GND_UPC1 22 VDD_PRE2 20 LEXTN 16 Description 41 42 BTI VDD_PRE1 19 902-928 MHz ISM Band 868-870MHz Band (Europe) Direct Sequence Spread Spectrum (DSS) Frequency Hopping Spread Spectrum Wireless LAN Wireless Communication Products 2 The BT1074Bi is a BiCMOS monolithic integrated RF transceiver. In addition to the input I/Q interface, the IC contains all of the required components to implement a complete RF-IF transceiver. This includes two on-chip local oscillators, a low noise amplifier with an overall noise figure of less than 5dB over temperature and power supply variations, two highly linear down-conversion mixers, an IF amplifier, an upconversion mixer and an on-chip power amplifier capable of delivering -4dBm to +17dBm. The unit operates with a power supply voltage range of 2.7 - 3.6 volts. * See Single-ended RFM input application example on page 15. Ordering Information BT1074Bi 850-950MHz RF Transceiver BTI, 13825 Cerritos Corporate Dr., Cerritos CA. 90703, U.S.A. Tel (562) 407-0500 Fax (562) 407-0510 [email protected] May 29, 2001 www.betheltronix.com Confidential and Proprietary Information of BTI Page 1 RFICs for 850 - 2400MHz • • • • • • 48 RF_INN GNDLNA R Applications GNDLNA1N 1 LEXTP 17 GND_PRE3 18 Complete single chip RF transceiver Two on-chip local oscillators I/Q or FM* input interface Single power supply 2.7 - 3.6 V Low power consumption BiCMOS technology On-chip LNA and RF Mixer RF Power selectivity (-4dBm or +17dBm) Wide operating temp range (-40oC to +85oC) TRFIC • • • • • • • • 63 Features BT1074Bi 850-950MHz RF TRANSCEIVER Specifications Parameters TRFIC R RFICs for 850 - 2400MHz Overall Power supply Operating Frequency ranges Receiver Gain Noise Figure Input IP3 Current consumption (w/ RF VCO) Transmitter Gain TX current consumption @ High power mode (with RF & IF VCOs) *with RF PA @ +15 dBm output IFVCO current consumption RFVCO current consumption Min. Typ. Max. Units 2.7 890 860 3.0 915 3.6 940 875 V MHz MHz 28 3.6 -11 - 35 4 -12 60 44 5 -13 - dB dB dBm mA - 17 89* - dB mA - 27 32 - mA mA 16 -13 -22 2.4 -44 - 20 -12 -21 2.8 50 300 22 -11 -20 3.3 -22 - dB dBm dBm dB dB Ω Ω 27 26 29 28 31 30 dB dB 12 -10 -20 - 15 -10 -20 300 330 20 -9 -19 - dB dBm dBm - >20 <4 0.5 VDD/2 VDD/2 - kΩ MHz Vp-p V V Receiver Section LNA + RF Downconversion Mixer Gain Input IP3 Input 1dB compression point Noise figure (LNA only) S11 Input impedance1 Output Impedance Image Rejection (at typical center freq.): 915MHz 881.49MHz IF Downconversion Mixer & IF Amp Gain Input IP3 Input 1dB compression point Noise figure Input Impedance Output Impedance Ω Ω Transmitter Section I&Q Modulator & Filter Input impedance I/Q input frequency I/Q input swing I/Q input DC level M_REF DC level May 29, 2001 Confidential and Proprietary Information of BTI Page 2 BT1074Bi 850-950MHz RF TRANSCEIVER Parameters RF Upconversion Mixer Conversion gain (internal) Input IP3 Input 1dB compression point Max. Units - 0 -10 -20 - dB dBm dBm +13 +15 +17 dBm - -4 - dBm - 25 50 7 -40 -30 dB Ω dBm dBm 780 - 805 -100 830 - MHz dBc/Hz -14 -118 -12 -6 dBc/Hz dBm 205 - 220 -112 235 - MHz dBc/Hz -14 -120 -8 -2 dBc/Hz dBm R Typ. TRFIC Power Amplifier* Output power into 50Ω load, high power mode (TX_P_CNT=0V) Output power into 50Ω load, low power mode (TX_P_CNT=VDD) Voltage Gain (internal) Output impedance (after combiner) Output 1dB compression point Output spurious suppression Min. Frequency range (at output to PLL) VCO phase noise at 100KHz offset (closed-loop) VCO phase noise at 1MHz offset VCO output level (50Ω) RFICs for 850 - 2400MHz RF VCO Section* IF VCO Section* Frequency range (at output to PLL) VCO phase noise at 100KHz offset (closed-loop) VCO phase noise at 1MHz offset VCO output level * The values in these sections refer to the 902-928MHz application. To use the BT1074B in the 868870MHz band, only the RF VCO, IF VCO, power combiner and LNA RF matching component values need to be changed. Absolute Maximum Ratings Parameters Value Unit Supply Voltage 7 V Power Control Voltage VDD+0.5 V Storage Temperature +150 o C Pin Table Pin Parameter I/O Description Power and Ground Pins 63/64 VDDLNA1-2 - Power supply to LNA 60 VDD_DMX - Power supply to downconverters 59 VDD_IF - Power supply to RX differential-to-single buffers 32 VDD_IFVCOIN - Power supply to IF VCO first stage May 29, 2001 Confidential and Proprietary Information of BTI Page 3 BT1074Bi I/O Description VDD_UPC - Power supply to TX upconverters 6 VDDPA_GR - Power supply to guard ring 19/20 VDD_PRE1-2 - Power supply to pre-amplifier 31 VDD_TXIF - Power supply to transmitter 40 VDDIF_VCO - Power supply to IF VCO 41 VDDRF_VCO - Power supply to RF VCO 47 VDDRFVCOIN - Power supply to RF VCO input stage 50 VDDRX_BUF - Power supply to receiver IF buffer 3 GNDLNA - Ground to LNA 61/62 GND_DMX1-2 - Ground to downconverters 56 GND_IF - Ground to RX differential-to-single buffers 34 GND_IFVCOIN - Ground to IF VCO first stage 22/23 GND_UPC1-2 - Ground to TX upconverters 13/15/18 GND_PRE1-3 - Ground to pre-amplifier 7/9/11 GND_PA1-3 - Ground to power amplifier 26/27 GND_TXIF1-2 - Ground to transmitter 5 GNDLNA1P - Ground to RX LNA differential first stage 1 GNDLNA1N - Ground to RX LNA differential first stage 37 GNDIFBUF - Ground to IF VCO buffer 39 GNDIF_VCO - Ground to IF VCO 42 GNDRF_VCO - Ground to RF VCO 44 GNDRFVCOIN - Ground to RF VCO input stage 53 GNDRX_BUF - Ground to receiver IF buffer 33 IF_VCO_GND - Ground to IF VCO buffer RFICs for 850 - 2400MHz 21 R Parameter TRFIC Pin 850-950MHz RF TRANSCEIVER Local Oscillator Pins 38 IF_VCO_OUT O IF VCO output 36 IFCAPIN I IF VCO feedback capacitors input 35 IF_VCO_CTRL I IF VCO control input 43 RF_VCO_OUT O RF VCO output 45 RF_VCO_CTRL I RF VCO control input 46 RFVCOCAPIN I RF VCO resistor bias input Transmitter Pins 8 RF_OUTN O Power amplifier output 10 RF_OUTP O Power amplifier output 24 TX_P_CNT I Transmission output power control: Hi - low power mode Low - high power mode 12 REXT2 I Bias for power amplifier 14 REXT1 I Bias for power amplifier May 29, 2001 Confidential and Proprietary Information of BTI Page 4 BT1074Bi 850-950MHz RF TRANSCEIVER Pin Parameter I/O Description 16 LEXTN O Output to external inductors 17 LEXTP O Output to external inductors 28 TXI I Baseband quadrature input to the transmitter 29 M_REF I I/Q input DC reference 30 TXQ I Baseband in-phase input to the transmitter RF_INP I RF Differential Input to the receiver 2 RF_INN I RF Differential Input to the receiver 55 VCO2_IN I Second Mixer’s input 54 MIXERINP I RF input to the second mixer 51 MIXOUTN O Differential output of second downconverter mixer 52 MIXOUTP O Differential output of second downconverter mixer 58 RMX_OUTP O Differential output of downconverter mixer 57 RMX_OUTN O Differential output of downconverter mixer R 4 TRFIC Receiver Pins RFICs for 850 - 2400MHz Power Down Pins 25 TX_EN I Transmitter power down control 49 RX_EN I Receiver power down control 48 RF_VCO_EN I RF VCO power down control Detailed Pin Description: RECEIVER RF_INP and RF_INN (Pin 4 and Pin 2) RF Differential Inputs RF_INP and RF_INN are the differential inputs of the LNA. An AC coupling capacitor of 100pF is required. RF differential inputs are generated by an external phase-splitter circuit, but for a single RF input, the LNA can be biased, as shown in the Application Circuit. For optimum performance, the component lead length of the external phase-splitter circuit and PCB traces to the LNA input pins should be minimized. Also, the ground plane must surround the phase -splitter circuit to prevent noise coupling from other circuits. The frequency range is from 890MHz to 940MHz. RMX_OUTP and RMX_OUTN (Pin 58 and Pin 57) First IF Differential Outputs These are the differential outputs of the internal IF buffers. With the external IF combiner circuit as shown in the Application Circuit, the differential outputs become a single-ended output to drive a 110.592MHz Bandpass SAW filter. These internal IF buffers have open-drain outputs to drive an input impedance of a 300Ω BPF through the external combiner circuit. MIXERINP (Pin 54) Second IF Amplifier Input The output of a 110.592MHz BPF SAW filter is connected to this pin for the second stage downconversion. No AC coupling is required. May 29, 2001 Confidential and Proprietary Information of BTI Page 5 BT1074Bi 850-950MHz RF TRANSCEIVER VCO2_IN (Pin 55) External Clock Input A clock of 99.892MHz is fed to this pin to downconvert the first IF at 110.592MHz to 10.7MHz. No AC coupling is required. VDDLNA1, VDDLNA2 (Pin 63 and Pin 64) LNA power VDDLNA supplies power to the first and second stage of the LNA. Since the LNA input signal level is small and high frequency, the VDDLNA should be decoupled very close to the chip (for example, within 0.25 inches of the package). GNDLNA1P, GNDLNA1N and GNDLNA (Pin 5, Pin 1 and Pin 3) LNA Ground GNDLNA1P and GNDLNA1N pins are the ground for the first stage of the LNA and GNDLNA is the ground for the second stage of the LNA. GNDLNA1P and GNDLNA1N are internally separated. For stability and optimum performance, the GNDLNA1P and GNDLNA1N should be physically short. TRFIC R RFICs for 850 - 2400MHz MIXOUTP and MIXOUTN (Pin 52 and Pin 51) Second IF Differential Outputs These are the second IF Amp differential outputs. The gain of the IF Amp can be controlled by connecting MIXOUTP through a resistor to ground. A 470Ω resistor to ground gives a 0dB gain. The other Amp output, MIXOUTN, is fed to a 10.7MHz BPF through an AC coupling (0.1uF) capacitor. VDD_DMX (Pin 60) Downconverter Power VDD_DMX supplies power to the downconversion mixers. GND_DMX1, GND_DMX2 (Pin 61 and Pin 62) Downconverter Ground GND_DMX is the ground for the downconversion mixers. This ground connection is recommended to be shorted via holes to the ground plane below. VDD_IF and VDDRX_BUF (Pin 59 and Pin 50) IF Buffers and Second Downconversion Mixers Power Both power supplies require 0.1uF bypass capacitors to ground. GND_IF and GNDRX_BUF (Pin 56 and Pin 53) IF Buffers and Second Down-Conversion Mixers Ground GND_IF is the ground for the internal IF buffers, and GNDRX_BUF is the ground for the second downconversion mixers and IF amplifiers. TRANSMITTER RF_OUTN and RF_OUTP (Pin 8 and Pin 10) Power Amplifier Outputs These are the differential outputs of the power amplifier which requires a combining network as shown in the Application Circuit. The combiner converts the differential signals to a single-ended signal and provides a matching impedance to 50Ω as well. DC bias to VDD is required since these are open-collector outputs, and AC coupling is needed after the combiner as shown. May 29, 2001 Confidential and Proprietary Information of BTI Page 6 850-950MHz RF TRANSCEIVER BT1074Bi LEXTN and LEXTP (Pin 16 and Pin 17) Preamplifier Amplifier Outputs These are the differential outputs of the preamplifier, which are open-collector types. Two inductors to the VDD are required for tuning the preamplifier to the desired frequency band. Recommended values for 900MHz are shown in the Application Circuit. Since these are also inputs to the power amplifier, the inductors should be close to the pins and isolated from the power amplifier output to avoid output feedback to these two pins, which may cause instability for the power amplifier. VDD_PRE1, VDD_PRE2 (Pin 19 and Pin 20) Power Supply for Preamplifier These are the power supply pins dedicated to the preamplifier. Decoupling should be done right at these pins to a ground plane, if possible. VDD_UPC (Pin 21) Power Supply for RF Upconversion Mixers This is a dedicated power supply pin for the RF upconversion mixers. Decoupling should be done right at this pin to a ground plane, if possible. VDD_TXIF (Pin 31) Power Supply for Input Buffers and IF Upconversion Mixers The input buffers and IF upconversion mixers share this power supply on-chip. Besides the usual high frequency decoupling, it should be decoupled for low frequency, up to 10MHz. May 29, 2001 Confidential and Proprietary Information of BTI Page 7 RFICs for 850 - 2400MHz VDDPA_GR (Pin 6) Power Supply for Guard Ring of Power Amplifier This power supply pin is only for the output stage of power amplifier. It should be decoupled right at the pin before sharing with other power supplies. R TXI, M_REF and TXQ (Pin 28, Pin 29 and Pin 30) Baseband Data Inputs These are the inputs which interface with the data signals from the digital signal processor (DSP) or microprocessor (µP). TXI and TXQ are inphase (I) and quadrature (Q) signals, respectively. M_REF is the DC signal coming from the DSP/µP. All of these pins require a DC level of VDD/2, and a voltage swing of 500mVp-p is required for TXI and TXQ. The Application Circuit shows a technique to interface with 1Vpp I and Q signals with a 6dB voltage attenuator with DC reference to M_REF pin. A low pass filter may also be required to reject sampling noise from the DSP/µP. For DSS applications, the base band data input signal can be modulated at the IFVCO tank circuit using a Gaussian filter, prior to the PLL frequency synthesizer. For that, the M_REF pin has to be biased to half of +VDD supply and both the TXQ & TXI input have to connect to the M_REF pin through a resistor in order to adjust the TX output gain. TRFIC REXT1 and REXT2 (Pin 14 and Pin 12) Preamplifier/Power Amplifier Bias/Gain Adjust Rext1 is the biasing resistor for the preamplifier, and REXT2 is the biasing resistor for the power amplifier. For an output power of +15dBm, recommended values are 1kΩ for REXT1 and 2.8kΩ for REXT2. Increasing REXT1 and lowering REXT2 will lower output power, and vice versa. BT1074Bi 850-950MHz RF TRANSCEIVER These are the dedicated ground pins that can share the same ground as long as a good ground plane is available: GND_PA1, GND_PA2, GND_PA3 (Pin 7, Pin 9 and Pin 11) Ground Pins for the Power Amplifier GND_UPC1, GND_UPC2 (Pin 22 and Pin 23) Ground Pins for the RF Upconversion Mixers GND_TXIF1, GND_TXIF2 (Pin 26 and Pin 27) Ground Pin for the Input Buffers and IF Upconversion Mixers RFVCO RF_VCO_CTRL (Pin 45) RFVCO Input Control An external tank circuit is connected to the RFVCO Input Control pin (see Application Circuit). The tank circuit generates the overall oscillation frequency for the RFVCO and therefore must be optimized to avoid any interference from other components. The RF_VCO_CTRL pin and the external PLL completes the RF-PLL loop that generates a fixed oscillation frequency for the RFVCO. TRFIC R RFICs for 850 - 2400MHz GND_PRE1, GND_PRE2, GND_PRE3 (Pin 13, Pin 15 and Pin 18) Ground Pins for the Preamplifier RF_VCO_OUT (Pin 43) RF_VCO Output The RF_VCO_OUT pin is connected to the external PLL to complete the RF-PLL loop. The PLL applies a DC voltage to the input tank circuit based on the detected RF_VCO_OUT signal. This DC voltage produces the negative bias voltage required by the Varactor to generate the necessary capacitance for the tank circuit network. VDDRFVCOIN and GNDRFVCOIN (Pin 47 and Pins 44) RFVCO Input Stage Power Supply and Ground VDDRFVCOIN is the power supply for the input stage of the RFVCO. For optimum performance, VDDRFVCOIN should be bypassed to GNDRFVCOIN using a low-inductance / high frequency coupling capacitor. The input stage of the RFVCO is very critical in generating the overall frequency of the RFVCO; therefore isolating these power supply pins will enhance the overall performance of the RFVCO. VDDRF_VCO and GNDRF_VCO (Pin 41 and Pin 42) RFVCO Power Supply and Ground VDDRF_VCO and GNDRF_VCO provide the power supply source for the other stages of the RFVCO. RFVCOCAPIN (Pin 46) RFVCO Resistor Bias Input This pin provides an off-chip resistor bias to the RF VCO. May 29, 2001 Confidential and Proprietary Information of BTI Page 8 850-950MHz RF TRANSCEIVER BT1074Bi IF VCO IF_VCO_CTRL (Pin 35) IF VCO Input This pin is connected to the external tank circuit as the VCO input. Its frequency is tuned to 221.184MHz (according to the RF module application) and can vary up to 500MHz. VDDIF_VCO (Pin 40) VCO Buffer Power Supply This pin provides power to the internal VCO buffer circuitry. GND_IFVCOIN (Pin 34) VCO Input Ground This pin is the first stage VCO ground. GNDIFBUF (Pin 37) VCO Buffer Ground This pin is ground for the internal VCO buffer circuitry. IF_VCO_GND (Pin 33) Ground to IF VCO Buffer This pin is ground for the IF VCO buffer, which is used by the transmitter section during transmission. GNDIF_VCO (Pin 39) VCO Ground This pin is ground for the internal VCO circuitry. POWER SAVING/POWER DOWN PINS The following pins are all CMOS digital interface. TX_P_CNT (Pin 24) Transmission Output Power Control This pin controls the power amplifier output with two levels. A HIGH signal puts the power amplifier in low power mode with -4dBm output power. A LOW signal puts the power amplifier in high power mode with +17dBm output power. These power levels are based upon the resistor values shown for REXT1 & REXT2. May 29, 2001 Confidential and Proprietary Information of BTI Page 9 RFICs for 850 - 2400MHz VDD_IFVCOIN (Pin 32) VCO Input Power Supply The IF VCO has two power supplies, VDD_IFVCOIN (Pin 32) and VDDIF_VCO (Pin 40). VDD_IFVCOIN is the first stage VCO power. A large capacitor of at least 100pF is recommended to connect this pin and ground for filtering out noise. R IF_VCO_OUT (Pin 38) IF VCO Differential Outputs The VCO's oscillation frequency can be controlled by connecting its output to a PLL as shown in the Application Circuit. TRFIC IFCAPIN (Pin 36) VCO Feedback Capacitors Input This pin provides an off-chip capacitive feedback loop to the VCO oscillator. BT1074Bi 850-950MHz RF TRANSCEIVER RF_VCO_EN (Pin 48) RF VCO Power Down Control This pin controls the power-down function of the RF VCO, which is used by the transmitter and the receiver. A HIGH signal turns the circuit off while a LOW signal turns the circuit on. RX_EN (Pin 49) Receiver Power Down Control This pin controls the power down function of the entire receiver. A HIGH signal turns the circuit off while a LOW signal turns the circuit on. TYPICAL PERFORMANCE CHARACTERISTICS The recommended TDD mode as well as power saving mode usage of all of these control pins are as follows: R RFICs for 850 - 2400MHz TX_EN (Pin 25) Transmitter Power Down Control This pin controls the power down function of the entire transmitter, including the power amplifier and preamplifier. A HIGH signal turns the circuit on while a LOW signal turns the circuit off. TRFIC Communication Mode TX RX Power Save Mode* TX_EN HI LO LO RX_EN HI LO HI RF_VCO_EN LO LO HI TX_P_CNT LO LO HI Pins Note: Control level for minimum power consumption. May 29, 2001 Confidential and Proprietary Information of BTI Page 10 BT1074Bi 850-950MHz RF TRANSCEIVER Block Diagram IF1=110.592MHz 3dB BW=1.1MHz Tx/Rx: 902-928MHz* BT1074Bi Image-Reject Mixer IF Mixer I FAmp (adjustable) RF VCO IFVCO_OUT (221.184MHz) IF VCO RFVCO_OUT (791.408 ~ 817.408MHz) RFVCO_CTRL RF_OUTN RF OUTP IFVCO_CTRL (442.368MHz) Power Amp (Pout=15dBm) IF Filter I/Q INPUT RF Filter RF Mixer (110.592MHz) Buffer *: ISM Band May 29, 2001 Confidential and Proprietary Information of BTI Page 11 RFICs for 850 - 2400MHz LPF & ANT. SW LNA R RF_INN RF INP LC or RC Filter Fc=10.7MHz Zin=Zout=330Ω TRFIC (99.892MHz) BT1074Bi 850-950MHz RF TRANSCEIVER RECEIVER: (Noise Figure Vs. Freq) (Noise Figure Vs. Freq) 6.2 Wave Symbol Wave D0:A0:par(nf) 6 Symbol 3.85 D0:A0:par(nf) D0:A1:par(nf) D0:A1:par(nf) 5.8 D0:A2:par(nf) D0:A2:par(nf) 3.0V 3.8 5.6 3.75 5.4 120C 5.2 3.7 5 3.65 4.8 4.6 3.6 4.4 Params (lin) 3.8 Params (lin) 25C 4 3.6 3.5 3.45 3.4 3.4 3.2 -40C 3 3.35 2.8 2.7V 3.3 2.6 2.4 3.25 2.2 3.2 2 1.8 3.15 1.6 3.1 1.4 800x 1g 800x 1g Frequency (lin) (HERTZ) Frequency (lin) (HERTZ) Figure 1. NF vs. Freq, varying temp. Figure 2. NF vs. Freq, varying Vdd 1dB Compression of RF Front-end of bt1074b, post layout simulation, Typical (1db.sp, rx_rf_top.lnt, vco810_top_y.lnt) Wave RF Front-End IIP3, Post Layout (Typical) Symbol 3.7 D0:A0:v(ifout) -22 dBm 3.6 3.5 3.4 IIP 3=-1 2dB m R RFICs for 850 - 2400MHz 3.3V 3.55 4.2 P ow er G ain=1 9dB 3.3 TRFIC 40.000 3.2 20.000 3.1 Voltages (lin) 0.000 -12 dBm -20.000 3 2.9 -40.000 2.8 -60.000 2.7 -80.000 2.6 -1 00.000 2.5 -1 20.000 -50.000 -40.000 -30.000 -20.000 -1 0.000 2.4 0.000 2.3 P in (d B m ) 0 50n 100n 150n 200n 250n 300n 350n 400n 450n Time (lin) (TIME) 500n 550n 600n 650n 700n 750n 800n Figure 4. P1dB (LNA + RF Mixer) Figure 3. IP3 (LNA + RF Mixer) One DB Compression IP3(POSTLAYOUT SIM)with Gain Control R=30 (15 dB Gain) 0 20 25C,3.0V, TYP IP3 = -9.2183 dBm One dB Compression -5 0 -9.2 dBm -40 -20 dBm -15 -20 1st harmonic simulation point 3rd harmonic simulation point -60 25C,3.0V, TYP, 15 dB Gain -10 Output Power (dBm) Output Power (dBm) -20 = -20 dBm -25 -80 -100 -40 -30 -40 -35 -30 -25 -20 Input Power (dBm) -15 -10 Figure 5. IP3 (IF Mixer + IF Amp) May 29, 2001 -5 -35 -30 -25 Input Power (dBm) -20 -15 -10 Figure 6. P1dB (IF Mixer + IF Amp) Confidential and Proprietary Information of BTI Page 12 BT1074Bi 850-950MHz RF TRANSCEIVER TRANSMITTER: RFVCO: 2.7V 3.0V -40C 25C TBD TRFIC TBD 120C RFICs for 850 - 2400MHz Figure 7. Freq vs. Cap., varying temp. R 3.3V Figure 8. Freq vs. Cap., varying vdd IFVCO: -40C 2.7V 25C 120C 3.0V TBD TBD 3.3V Figure 9. Freq vs. Cap., varying temp. Figure 10. Freq vs. Cap., varying vdd APPLICATION INFORMATION: The BT1074Bi is a complete RF transceiver which integrates the receiver, transmitter and local oscillator functions into one chip. Designed to operate in TDD mode, the chip supports ISM band applications, including DSS. The example described here (and shown in the Application Circuit) shows the BT1074Bi used in a 902-928MHz product. Only the RF VCO, IF VCO and power combiner impedance component matching values need to be changed to use the BT1074Bi for other frequency bands (i.e. 868-870MHz). May 29, 2001 Confidential and Proprietary Information of BTI Page 13 BT1074Bi 850-950MHz RF TRANSCEIVER TRFIC R RFICs for 850 - 2400MHz 902-928MHz Example The transmitter accepts I&Q inputs from the system interface which also provides the DC reference level to M_REF pin. An on-chip RF filter removes spurious signals before going to the on-chip power amplifier. RF outputs are differential and a power combining network is required for converting to a single-ended interface with an output load (see Application Circuit on page 15). A power control pin selects between high or low transmission power mode, which ranges from -4dBm to +17dBm. The power level can also be set with resistors at REXT2 and REXT1 pins. In the receiver section, an on-chip bandpass filter is provided between the LNA output and downconverter mixer input for optimum noise performance. The first IF outputs at 110.592MHz are differential and require a power combiner. The second IF mixer downconverts the first IF signal from 110.592MHz to 10.7MHz by an external crystal clock input at 99.892MHz. A gain-adjustable IF amplifier provides additional gain up to 20dB. The RF local oscillator and the transmitter IF oscillator are conveniently provided on-chip and can be used with an external dual PLL frequency synthesizer. Both the RF and IF local oscillators require external tuning elements, as shown in the Application Circuit on page 15. The receiver, transmitter, and the two oscillators can each be put into sleep mode with on-chip power-down control pins. These functions can be turned on or off by a microcontroller. For example, in the receiving mode, the microcontroller will turn on the receiver and will turn off the transmit function. The RF and IF VCOs will always be on during the TX and RX mode. In the transmitting mode, the microcontroller will turn on the transmitter and will turn off the receiver function. The recommended usage of the BT1074Bi is shown in the digital spread spectrum system block diagram on the next page in Figure A: May 29, 2001 Confidential and Proprietary Information of BTI Page 14 BT1074Bi 850-950MHz RF TRANSCEIVER Digital Spread Spectrum System Block Diagram TRFIC Demodulator 50Ω BTI RF_OUTP/RF_OUTN RF_VCO_OUT BT1074Bi RF_VCO_CTRL Dual-Synthesizer IF_VCO_OUT IF_VCO_CTRL IFVCO Tank RFICs for 850 - 2400MHz RF_INP/RF_INN R MIXOUTP/MIXOUTN Digital Spread Spectrum Controller BPF Antenna Modulated Signal Figure A May 29, 2001 Confidential and Proprietary Information of BTI Page 15 BT1074Bi 850-950MHz RF TRANSCEIVER APPLICATION CIRCUIT: I & Q INPUT MODULATION B4542 fc =110.592MHz IL<12.2dB 3dB BW = 1.1MHz 0.1uF FM DEMODULATOR 330nH 99.892 MHz 100pF VddRX VddRX VDDRX_BUF 49 RX_EN 51 MIXOUTN 50 52 MIXOUTP MIXERINP 54 53 GNDRX_BUF 55 VCO2_IN 56 GND_IF 45 RF_VCO_CTRL RF VCO Power Down VddRFVCO 470 100pF GNDLNA1P 5 44 VDDPA_GR 6 43 RF_VCO_OUT GND_PA1 7 RF_OUTN 8 GND_PA2 9 RF_OUTP 10 GND_PA3 11 GNDRFVCOIN RF VCO In 100pF 33 IF_VCO_GND TXQ GND_TXIF1 TX_P_CNT GND_UPC2 GND_UPC1 VDD_IFVCOIN 32 16 VDD_TXIF 31 LEXTN 30 GND_IFVCOIN M_REF 29 34 TXI 28 15 GND_TXIF2 27 GND_PRE2 26 IF_VCO_CTRL TX_EN 25 35 24 14 23 IFCAPIN REXT1 22 37 GNDIFBUF 36 21 External VDD 39 GNDIF_VCO 38 IF_VCO_OUT 13 LEXTP 4.7nF BBY51-03W VddIFVCO 12 6.8nH 1.8K 220pF 100pF 40 VDDIF_VCO BT1074Bi 100pF RF PLL Control 2.7nH 15pF VddRFVCO REXT2 6.8nH 3.3K 41 VDDRF_VCO GND_PRE1 VddTX 18K 27nF 42 GNDRF_VCO BTI 20 560 58 RMX_OUTP 46 RFVCOCAPIN 4 VDD_UPC ANTENNA SWITCH 57 RMX_OUTN 3 RF_INP 5.6nH 10K 59 VDD_IF GNDLNA VDD_PRE2 VddTX 61 GND_DMX1 47 VDDRFVCOIN 3.3pF 2.2pF 60 VDD_DMX 48 2 19 100pF RF_VCO_EN 1 VDD_PRE1 8.2nH Rx Power Down RF_INN 18 VddTX 100pF GNDLNA1N 17 VddTX 63 VDDLNA1 100pF 62 GND_DMX2 64 VDDLNA2 100pF 100pF RX_DATA OUT 10.7MHz 0.1uF 0.1uF 100pF 220 Dual PLL 50Ω 12nH R 220nH 22pF 3.3pF 3.3pF VddRX 1nF TRFIC 270nH Antenna GND_PRE3 RFICs for 850 - 2400MHz VddRX 100pF 15pF 15pF IF VCO In 12pF 18K 5.6K IF PLL Control 39nH BBY51-03W 3.3K 2.7nF 220pF 33nF VddIFVCO VddTX 100pF 100pF VddTX High / Low PA Power Mode Tx Power Mode 100pF 1.5k 1.5k 1K 1K 1uF I MREF Q INPUT Figure C May 29, 2001 Confidential and Proprietary Information of BTI Page 16 BT1074Bi 850-950MHz RF TRANSCEIVER APPLICATION CIRCUIT: DIRECT INPUT MODULATION AT IFVCO B4542 fc =110.592MHz IL<12.2dB 3dB BW = 1.1MHz VddRX 100pF 270nH 0.1uF 3.3pF VddRX FM DEMODULATOR 330nH 99.892 MHz 100pF VddRX VddRX GNDLNA1P VDDPA_GR 6 GND_PA1 7 RF_OUTN 8 GND_PA2 9 RF_OUTP 10 GND_PA3 11 RF VCO Power Down VddRFVCO 470 100pF GNDRFVCOIN VddRFVCO VDDRX_BUF 49 RX_EN 51 MIXOUTN 50 52 MIXOUTP MIXERINP 54 53 GNDRX_BUF 55 VCO2_IN 56 GND_IF BT1074Bi RF VCO In VddIFVCO 100pF TXQ GND_TXIF1 TX_P_CNT GND_UPC2 GND_UPC1 LEXTP VDD_IFVCOIN 32 IF_VCO_GND VDD_TXIF 31 33 30 16 M_REF 29 LEXTN TXI 28 GND_IFVCOIN GND_TXIF2 27 34 26 15 TX_EN 25 GND_PRE2 24 IF_VCO_CTRL 23 35 22 14 21 IFCAPIN REXT1 20 37 GNDIFBUF 36 100pF 220 15pF 15pF IF VCO In 12pF 18K 5.6K IF PLL Control 39nH 3.3K 2.7nF 220pF BBY51-03W 33nF VddIFVCO VddTX 100pF 100pF VddTX High / Low PA Power Mode External VDD 39 GNDIF_VCO 38 IF_VCO_OUT 13 100pF 4.7nF BBY51-03W 100pF 40 VDDIF_VCO 12 6.8nH 1.8K 220pF 41 VDDRF_VCO REXT2 VddTX RF PLL Control 15pF 27nF 42 GNDRF_VCO BTI GND_PRE1 6.8nH 3.3K 18K 2.7nH 43 RF_VCO_OUT VDD_UPC 560 58 RMX_OUTP 5 44 VDD_PRE2 ANTENNA SWITCH 57 RMX_OUTN 45 RF_VCO_CTRL 5.6nH 10K 59 VDD_IF 46 RFVCOCAPIN 4 19 VddTX 61 GND_DMX1 3 RF_INP 3.3pF 2.2pF 60 VDD_DMX GNDLNA 1nF 12nH 63 VDDLNA1 47 VDDRFVCOIN VDD_PRE1 100pF 48 2 18 8.2nH RF_VCO_EN 1 RF_INN 17 VddTX Rx Power Down GNDLNA1N GND_PRE3 VddTX 100pF Tx Power Mode LPF 100pF 56K 56K TX MOD_IN 6.8K 10K VddTX 100pF Figure B May 29, 2001 Confidential and Proprietary Information of BTI Page 17 RFICs for 850 - 2400MHz 100pF 62 GND_DMX2 100pF R 64 VDDLNA2 100pF Dual PLL 50Ω 0.1uF 0.1uF RX_DATA OUT 10.7MHz TRFIC Antenna 220nH 22pF 3.3pF BT1074Bi 850-950MHz RF TRANSCEIVER Package Dimensions A2 A1 10x10x1.0 64 LD TQFP PACKAGE: Hd D ∆ Y L1 b e Symbol A1 A2 b c D E e Hd He L L1 Y θ Min. 9.90 9.90 11.90 11.90 0.45 0 Millimeter Nom. 0.10 1.00 0.2 0.127 10.00 10.00 0.50 12.00 12.00 0.60 1.00 Max. Min. 10.10 10.10 0.390 0.390 12.10 12.10 0.75 0.468 0.468 0.018 0.08 7 0 Inch Nom. .004 .039 .008 .005 0.394 0.394 0.020 0.472 0.472 0.024 0.039 Max. 0.398 0.398 0.476 0.476 0.030 0.003 7 c θ L TRFIC R RFICs for 850 - 2400MHz He E The information provided herein is believed to be accurate and correct. BethelTronix, Inc. assumes no responsibility for the inaccuracies or use of the information or the use of the described product. BethelTronix, Inc. reserves the right to make changes in circuit design and/ or specifications at any time without further notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third parties. Copyright 2001 BethelTronix, Inc. All rights reserved May 29, 2001 Confidential and Proprietary Information of BTI Page 18