Texas Instruments TRF3703 Скачать руководство пользователя страница 9 | Manualshive

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Texas Instruments TRF3703 Скачать руководство пользователя страница 9

C001

1.4.2

Interface to TI's DAC

www.ti.com

Overview

Figure 3. GSM EDGE EVM at 1800 MHz

Both the TRF3703-33 and the TRF3703-15 work well with TI's DACs. The TRF3703-33 is well suited to
work with TI's DAC568X family, and the TRF3703-15 is well suited to work with TI's DAC56X2 series.
Each DAC series is optimized to work at certain common-mode voltage. The DAC568X has a
common-mode of 3.3 V, while the DAC56X2 has a 0.7-V common-mode voltage. Figure 1 shows an
interface network to interface both DAC series to the TRF3703.

SLWU042B – October 2006 – Revised August 2008

TRF3703 Quadrature Modulator Evaluation Module

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Содержание TRF3703

Страница 1: ...TRF3703 Quadrature Modulator Evaluation Module User s Guide Literature Number SLWU042B October 2006 Revised August 2008...

Страница 2: ...2 SLWU042B October 2006 Revised August 2008 Submit Documentation Feedback...

Страница 3: ...TRF3703 EVM Operating Procedure 6 2 Physical Description 11 2 1 PCB Layout 11 2 2 Parts List 18 3 Circuit Description 18 3 1 Circuit Function 18 4 Circuit Board 19 5 Schematic 20 Important Notices 21...

Страница 4: ...work for 19 2 mA Full Scale 10 6 Top Layer 11 7 Top Layer NH 12 8 Ground Plane L2 13 9 Ground Plane L3 14 10 Layer 4 Bottom Layer 15 11 Layer 4 Bottom Layer NH 16 12 Drill Pattern 17 13 Silkscreen Top...

Страница 5: ...manual applies to both the TRF3703 33 and TRF3703 15 devices The EVM comes configured for differential I Q input signals via four SMA connectors as shown in the schematic Figure 14 and in Table 1 For...

Страница 6: ...nerator to suppress the sideband Adjust the I Q amplitude and phase of the CW signal coming from the arbitrary waveform generator 6 Connect a spectrum analyzer to the SMA connector marked RFOUT J7 and...

Страница 7: ...nals which are controlled with the gain settings of the DAC This is an iterative procedure that results in optimized suppression levels that exceeds 60 dBc The level of suppression observed depends on...

Страница 8: ...offsets in mV steps until you obtain the minimum carrier feedthrough A typical carrier feedthrough value exceeds 50 dBm See Figure 2 1 Provide a GSM edge signal of the desired frequency into the diff...

Страница 9: ...he TRF3703 15 is well suited to work with TI s DAC56X2 series Each DAC series is optimized to work at certain common mode voltage The DAC568X has a common mode of 3 3 V while the DAC56X2 has a 0 7 V c...

Страница 10: ...erface calculator is available SLWC083 Figure 4 1 5 V Interface Network for 19 2 mA Full Scale LOSS 1 dB 2 dB 3 dB 4 dB 5 dB Pullup R1 115 115 115 115 115 Pulldown R3 634 634 634 634 634 Series R5 11...

Страница 11: ...and list of components used on the evaluation module The EVM is constructed on a four layer 38 1 mm 38 1 mm 1 579 mm thick PCB using FR 4 material Figure 6 through Figure 12 show the individual layer...

Страница 12: ...K002 Physical Description www ti com Figure 7 Top Layer NH 12 TRF3703 Quadrature Modulator Evaluation Module SLWU042B October 2006 Revised August 2008 Submit Documentation Feedback...

Страница 13: ...K003 www ti com Physical Description Figure 8 Ground Plane L2 SLWU042B October 2006 Revised August 2008 TRF3703 Quadrature Modulator Evaluation Module 13 Submit Documentation Feedback...

Страница 14: ...K004 Physical Description www ti com Figure 9 Ground Plane L3 14 TRF3703 Quadrature Modulator Evaluation Module SLWU042B October 2006 Revised August 2008 Submit Documentation Feedback...

Страница 15: ...K005 www ti com Physical Description Figure 10 Layer 4 Bottom Layer SLWU042B October 2006 Revised August 2008 TRF3703 Quadrature Modulator Evaluation Module 15 Submit Documentation Feedback...

Страница 16: ...K006 Physical Description www ti com Figure 11 Layer 4 Bottom Layer NH 16 TRF3703 Quadrature Modulator Evaluation Module SLWU042B October 2006 Revised August 2008 Submit Documentation Feedback...

Страница 17: ...Total 0 254 mm 0 3048 mm 0 3302 mm 0 9398 mm PTH PTH PTH PTH D001 www ti com Physical Description Figure 12 Drill Pattern SLWU042B October 2006 Revised August 2008 TRF3703 Quadrature Modulator Evaluat...

Страница 18: ...HEADER 2POS_JUMP 2 HTSW 150 07 L S SAMTEC N A W1 W2 This chapter discusses the various functions of the EVM Headers W1 and W2 supply 5 V VCC dc power to the modulator Header W1 supplies 5 V to the LO...

Страница 19: ...GND GND 50 W RF_OUT K001 www ti com Circuit Board This chapter shows the circuit board test points Figure 13 Silkscreen Top Layer SLWU042B October 2006 Revised August 2008 TRF3703 Quadrature Modulator...

Страница 20: ...MA_END IP C5 1000 pF 1 2 3 4 5 J7 SMA_END C3 100 pF C4 1000 pF 1 2 3 4 5 J5 SMA_END QN 1 2 3 4 5 J6 SMA_END QP RF_OUT W1 2POS_JUMPER W2 2POS_JUMPER C8 C9 R1 0 C6 C7 4 7uF R4 0 R5 0 R2 0 R3 0 S0214 01...

Страница 21: ...mperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engineer or visit www ti com esh No license is granted under any paten...

Страница 22: ...siness practice TI is not responsible or liable for any such statements TI products are not authorized for use in safety critical applications such as life support where a failure of the TI product wo...

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