Texas Instruments TRF1500 - Manuals

Contents Abstract ......................................................................................................................... 9 Product Support ......................................................................................................... 10 The TI Advantage Extends Beyond R...

TRF1500 Integrated Dual-Band RF Receiver User’s Guide 9 TRF1500 Integrated Dual-Band RF Receiver User’s Guide Abstract The dual-band handset market is expanding very rapidly due tothe increase in customers requiring roaming capability. Thecustomer also demands that handsets have an increase infeatur...

SWRA004A 10 TRF1500 Integrated Dual-Band RF Receiver User’s Guide Product Support The TI Advantage Extends Beyond RF to Every Other MajorWireless System Block RF Interface RF Interface Audio Interface Audio Interface TMS320C54X DSP Core S/W TMS320C54X DSP Core S/W ARM7 TDM IE (C470) Microcontr oller...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 11 Related Documentation The following list specifies product names, part numbers, andliterature numbers of corresponding TI documentation. ❑ Dual-Band/Dual-Mode PCS Receiver, Literature numberSLWS041A World Wide Web Our World Wide Web s...

SWRA004A 12 TRF1500 Integrated Dual-Band RF Receiver User’s Guide Introduction The TRF1500 is a dual-band/dual-mode PersonalCommunications System (PCS) receiver for cellular telephonesoperating dual mode (analog and digital) in the 800 MHz band andsingle mode (digital) in the 1900 MHz band. The TRF1...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 13 Design Considerations The successful integration of a TRF1500 receiver device into adesign is dependent upon the performance of the externalcomponents and the quality of the board design and layout. External Components Component toler...

SWRA004A 14 TRF1500 Integrated Dual-Band RF Receiver User’s Guide TRF 1500 Dual-Band Receiver A block diagram of the TRF1500 dual-band receiver front enddown converter is shown in Figure 1. Pin names and descriptionsare provided in Table 1. The device operates from a single 3.75volt supply and its o...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 15 Table 1. Pin Descriptions Pin Number Name Description 1 Bias Adjust Bias adjust 2 TX IF + Transmit IF, noninverting output 3 TX IF - Transmit IF, inverting output 4 GND ground 5 MIX IN LOW BAND Low band mixer input 6 GND ground 7 VCC ...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 17 TRF1500 Control State The TRF1500 operates in 18 different states: The control codeand active circuits are given in Table 2. Table 2. Control State and the Corresponding Active Circuits Control Code (HI/LO, SYN ON, RX ON, TX ON, STRON...

SWRA004A 18 TRF1500 Integrated Dual-Band RF Receiver User’s Guide Low Band Cascaded Receiver Section: LNA, External SAWFilter, Mixer, and LO Buffer Amplifier The TRF1500 low-band receiver section, shown in Figure 2, is anintegrated front-end down converter designed to operate in the800 MHz frequency...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 19 Low-Band LNA In a typical down-conversion receiver, the LNA is usually placeddirectly after the antenna and a band-select filter. The purpose ofthe LNA is to amplify the desired signal being received whileadding as little undesired no...

SWRA004A 20 TRF1500 Integrated Dual-Band RF Receiver User’s Guide Low-Band LNA Input Figure 4 details the low-band LNA input configuration. The LNAinput impedance matching network primarily determines thecascaded gain, noise figure, and input return loss performance ofthe low-band receiver section. ...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 21 Figure 5. Low-Band LNA Output Configuration Surface Acoustic Wave (SAW) Filter The SAW filter is used primarily as an image-reject filter (IRF).The image frequency (f IM ) is located at the desired channel frequency (f CH ) plus two t...

SWRA004A 22 TRF1500 Integrated Dual-Band RF Receiver User’s Guide Low-Band Mixer The purpose of the mixer in a down-conversion receiver is totranslate incoming signals from one frequency to another. Thelow-band mixer in the TRF1500 is a three port high-side injectedcircuit. The mixer takes two known...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 23 Low-Band Mixer LO Input Figure 8 details the low-band mixer LO input configuration. Theinput power range level for the LO buffer amplifier is flexibleenough (-3 dBm to -7 dBm) to drive the mixer without enteringcompression. The LO sig...

SWRA004A 24 TRF1500 Integrated Dual-Band RF Receiver User’s Guide Figure 9. Low-Band IF Output Configuration Low-Band LO Buffer Amplifier Output Figure 10 details the low-band LO buffer amplifier configuration.The low-band LO buffer amplifier can be used in either single-ended or differential mode f...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 25 Figure 10. Low-Band Buffer Amplifier Output Configuration

SWRA004A 26 TRF1500 Integrated Dual-Band RF Receiver User’s Guide Low-Band Cascaded Test Guide This section involves measuring the cascaded performance of theLow Band LNA, Low Band MIXER and Low Band IF Amp. Anexternal SAW filter is utilized to complete the RF receiver section.All tests apply for an...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 27 2) Set the LO source power (LO P in ) and the desired frequency (see Table 3). Connect the LO source to the EVM LO inputport, J12. 3) Set the spectrum analyzer to measure at the IF frequency (see Table 3). 4) Connect the EVM IF output...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 31 LOW BAND: LO Buffer Output Power Control state: 011000 SEE APPENDIX A: TEST BENCH SETUPS Test setup Figure 20 This section involves measuring the Low Band LO Buffer Output.All unused ports will be terminated into 50 Ω . The LO buffer ...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 33 Low-Band Cascaded: 1dB RF Input Compression Point Control state: 011000 SEE APPENDIX A: TEST BENCH SETUPS Test setup Figure 20 The 1 dB input compression point is the RF input power at whichthe gain compresses 1 dB. Gain compression i...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 35 High-Band Cascaded Receiver Section: LNA, Mixer, LOBuffer Amplifier Cascaded High-Band Receiver Section: LNA, Mixer, and LO Amplifier The TRF1500 high-band receiver section, shown in Figure 11, isan integrated front-end down converter...

SWRA004A 36 TRF1500 Integrated Dual-Band RF Receiver User’s Guide High-Band RF Input Figure 12 details the high-band RF input configuration. Thecascaded noise figure and input return loss performance of thehigh-band receiver section is determined primarily by the inputmatching network. The input mat...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 37 Figure 13 details the TRF1500 configured to utilize the low-bandLO input and doubler as the high-band LO. The high-band LOsignal is injected into the low-band LO input. The buffered signalis then routed through the doubler. The output...

SWRA004A 38 TRF1500 Integrated Dual-Band RF Receiver User’s Guide High-Band IF Output Figure 15 details the high-band mixer IF output configuration. Thehigh-band mixer has a differential IF output with a 1k Ω differential output impedance. For evaluation purposes, a 16:1 transformerbalun, with an in...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 39 High-Band LO Buffer Amplifier Output Figure 16 details the high-band LO buffer amplifier configuration.The high-band LO buffer can be used in either single-ended ordifferential mode for a phase lock loop (PLL) configuration. Thebuffer...

SWRA004A 40 TRF1500 Integrated Dual-Band RF Receiver User’s Guide High-Band Cascaded Test Guide This section involves measuring the cascaded performance of theHigh Band LNA, High Band Mixer and High Band IF Amp usingthe Frequency Doubler. All tests apply for an IF output terminatedinto a 1 k Ω diffe...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 41 2) Set the LO source power (LO P in ) and the desired frequency (see Table 4). Connect the LO source to the EVM LO inputport, J12. 3) Set the spectrum analyzer to measure at the IF frequency (see Table 4). 4) Connect the EVM IF output...

SWRA004A 46 TRF1500 Integrated Dual-Band RF Receiver User’s Guide High-Band Cascaded: Power Leakage LO In to RF In Control state: 111001 SEE APPENDIX A: TEST BENCH SETUPS Test setup Figure 23 The LO leakage at the RF port is measured at the low band RFinput port J20. Power leakage is a measure of po...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 47 6) Connect the EVM IF output port, J21 to the spectrum analyzer. 7) Measure the Fundamental output power at the IF frequency (F Fund ). 8) Measure the Intermodulation products (2F 2 - F 1 or 2F 1 - F 2 ) at F IF ± 120 kHz 9) Calculate...

SWRA004A 48 TRF1500 Integrated Dual-Band RF Receiver User’s Guide RF P in P out Gain -35 -10 25 -34 -9 25 -33 -8 25 -32 -7 25 -31 -6 25 -30 -5 25 -29 -4 25 -28 -3 25 -27 -2 25 -26 -1.2 24.8 -25 -0.4 24.6 -24 0.4 24.4 -23 1.2 24.2 -22 2.2 24.2 -21 3.0 24.0 ← 1dB Compression Point -20 3.0 23.0 High-Ba...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 49 8) Calculate 2 X 2 spur performance as 2 X 2 spur performance = 1 P out - 2 P out. High Band: 3X3 Spur Performance Control state: 111001 SEE APPENDIX A: TEST BENCH SETUPS Test setup Figure 20 3X3 Spur Performance is measured at IF out...

SWRA004A 50 TRF1500 Integrated Dual-Band RF Receiver User’s Guide Low-Band and High-Band Transmit Low- and High-Band Transmit Mixer Figure 17 details the block diagram of the transmit mixer. TheTRF1500 provides a transmit mixer for down converting thesystem transmit signal (low-band or high-band) to...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 51 Figure 18. Low- and High-Band Transmit Mixer RF Input Configuration Low- and High-Band Transmit Mixer IF Output Figure 19 details the transmit mixer IF output configuration. Thetransmit mixer has a differential IF output with a 1k Ω d...

SWRA004A 52 TRF1500 Integrated Dual-Band RF Receiver User’s Guide Low-Band Transmit Mixer Test Guide This section involves measuring the Transmit Mixer performance.All tests apply for an IF output terminated into a 1 k Ω differential load. To match the IF output to the 50 Ω test equipment a transfor...

SWRA004A 54 TRF1500 Integrated Dual-Band RF Receiver User’s Guide b) Next, press the Noise Figure and Gain Button. The corrected LED just above the button should be lit. c) Calibration is complete. Enter the desired IF frequency to measure. Next, the external equipment Loss is considered (RF cable,T...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 55 1) Set the network analyzer to measure the low band RF frequency (see Table 5). 2) Set the power range to -35 dBm through -20 dBm, and then set the input power to -30 dBm. 3) Perform a full one-port calibration on port 1 of the networ...

SWRA004A 56 TRF1500 Integrated Dual-Band RF Receiver User’s Guide 1) Set the TX source frequency and input power (see Table 5). Connect the TX source to the EVM TX input port, J30. 2) Set the spectrum analyzer to measure at the TX frequency (see Table 5). 3) Connect the LO In Port, J12, to the spect...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 59 High-Band Transmit Mixer Test Guide This section involves measuring the High Band Transmit Mixerperformance. All tests apply for an IF output terminated into a 1k Ω differential load. To match the IF output to the 50 Ω test equipment ...

SWRA004A 60 TRF1500 Integrated Dual-Band RF Receiver User’s Guide Low-Band LNA Stand-Alone Test Guide This section involves measuring the Low Band LNA by itself. Allunused ports are terminated into 50 Ω . Before measuring the low band LNA by itself the EVM board must be modified as follows:Remove C1...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 61 The LNA input return loss is measured at the input Port J10. Usingthe calibration performed above, set the network analyzer tomeasure S11. Low-Band LNA: Output Return Loss Control state: 011000 The LNA output return loss is measured a...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 65 Low-Band Receiver Mixer Stand-Alone Test Guide This section involves measuring the Low Band Receiver Mixer. Allunused ports will be terminated into 50 Ω . Before measuring the low band Mixer separately, the EVM board must be modified ...

SWRA004A 66 TRF1500 Integrated Dual-Band RF Receiver User’s Guide 5) Measure the IF output power (IF P out ) at the IF frequency with the spectrum analyzer. 6) Calculate the Cascaded Gain as: Gain = (IF P out - RF P in ) + Transformer Loss. The transformer loss is 1.8dB. Low-Band Receiver Mixer: Inp...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 67 Low-Band Receiver Mixer: Power Leakage LO In to RF In Control state: 011000 SEE APPENDIX A: TEST BENCH SETUPS Test setup Figure 23 The LO leakage at the RF port is measured at the low band mixerRF input port, J15. Power leakage is a m...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 69 J12, may be necessary to eliminate the broad band noiseduring testing. 9) Connect the EVM IF output port, J11, to the noise figure meter input port. a) A bandpass or low pass filter may be necessary on the IF port to eliminate the LO ...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 71 Intermodulation Suppression = F Fund - Intermodulation product 10) Calculate the Input Third -Order Intercept Point as: Input Third-Order Intercept = ((IntermodulationSuppression/2) + (RF P in ))

SWRA004A 72 TRF1500 Integrated Dual-Band RF Receiver User’s Guide Appendix A: Test Bench Configuration Figure 20. Test Bench Setup: Power Conversion Gain, Power Conversion Gain Reduction, 1dB RF Input Compression Point, Second Order Input Intercept Point (IIP2), 2x2 Spur Performance, 3x3 Spur Perfor...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 73 Figure 22. Test Bench Setup: Noise Figure NOISE FIGURE METER DUT LO SIGNAL SOURCE RF IN IF OUT LO IN DC POWER SUPPLY DC POWER METER NOISE SOURCE Figure 23. Test Bench Setup: Power Leakage LO In to RF In 50 Ω DUT SPECTRUM ANALYZER LO S...

SWRA004A 74 TRF1500 Integrated Dual-Band RF Receiver User’s Guide Figure 24. Test Bench Setup: Power Leakage RF In to LO In Measurements 50 Ω SPECTRUM ANALYZER RF SIGNAL SOURCE DC POWER SUPPLY DC POWER METER RF IN LO IN IF OUT DUT Figure 25. Test Bench Setup: LNA Noise Figure Measurements DC POWER S...

SWRA004A TRF1500 Integrated Dual-Band RF Receiver User’s Guide 75 Figure 26. Test Bench Setup: LNA Third Order Input Intercept Point (IIP3) Measurement RF SIGNAL SOURCE RF SIGNAL SOURCE DC POWER SUPPLY DC POWER METER RF IN RF OUT SPECTRUMANALYZER DUT Figure 27. Test Bench Setup: LNA 1dB Input Compre...