Related Manuals for Texas Instruments TRF370315
Summary of Contents for Texas Instruments TRF370315
- Page 1 TRF3703 Quadrature Modulator Evaluation Module User's Guide Literature Number: SLWU042B October 2006 – Revised August 2008...
- Page 2 SLWU042B – October 2006 – Revised August 2008 Submit Documentation Feedback...
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Page 3: Table Of Contents
Contents ..........................Overview ........................Purpose ....................EVM Circuit Overview ..................... Power Requirements ................... TRF3703 EVM Operating Procedure ......................Physical Description ....................... PCB Layout ........................Parts List ......................Circuit Description ......................Circuit Function ........................Circuit Board ......................... Schematic ....................... Important Notices SLWU042B –... - Page 4 www.ti.com List of Figures ..................Un-Optimized Sideband Suppression ..................Optimized Sideband Suppression .................... GSM EDGE EVM at 1800 MHz ................ 1.5-V Interface Network for 19.2 mA Full Scale ................ 3.3-V Interface Network for 19.2 mA Full Scale ........................Top Layer ......................
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Page 5: Overview
User's Guide SLWU042B – October 2006 – Revised August 2008 TRF3703 Quadrature Modulator Evaluation Module Overview This document relates to the TRF3703-33 and TRF3703-15 (hereinafter referred to as TRF3703) direct quadrature modulator for applications in the transmit path of base stations and communications equipment. -
Page 6: Trf3703 Evm Operating Procedure
Overview www.ti.com TRF3703 EVM Operating Procedure Set up the EVM as follows: 1. Power-supply connection: a. Switch on the V (5-V) supply and set the current limit set to 235 mA. b. Connect the 5-V supply to headers W1 and W2. c. -
Page 7: Un-Optimized Sideband Suppression
Overview www.ti.com C003 Figure 1. Un-Optimized Sideband Suppression 1.4.1.2 Optimized Sideband Suppression There are two ways to change the sideband suppression of the TRF3703. One is the amplitude between the four inputs, and the second is the phase of the four inputs. The ideal condition is when all four inputs (I, I, Q, and Q) have exactly the same amplitude and the phase relationship is: I = 0°, I = 180°, Q = 90°, and Q = 270°. -
Page 8: Optimized Sideband Suppression
Overview www.ti.com C002 Figure 2. Optimized Sideband Suppression 1.4.1.3 Carrier Feedthrough Carrier feedthrough is the amount of the LO that leaks onto the output spectrum of the modulator. Ideally for the TRF3703, inputs (I, I, Q, and Q) must be at approximately 3.3 V for TRF3703-33 and 1.5 V for TRF3703-15. -
Page 9: Gsm Edge Evm At 1800 Mhz
Overview www.ti.com C001 Figure 3. GSM EDGE EVM at 1800 MHz 1.4.2 Interface to TI's DAC 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. -
Page 10: V Interface Network For 19.2 Ma Full Scale
Overview www.ti.com DAC56x2 TRF3703-15 S0225-01 TYPICAL VALUES 53 Ω 210 Ω 931 Ω NOTE: A DAC interface calculator is available (SLWC083). Figure 4. 1.5-V Interface Network for 19.2 mA Full Scale DAC568x TRF3703-33 S0226-01 LOSS 1 dB 2 dB 3 dB 4 dB 5 dB Pullup... -
Page 11: Physical Description
Physical Description www.ti.com Physical Description This chapter discusses the four-layer PCB layout, component placement, and list of components used on the evaluation module. PCB Layout 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... -
Page 12: Top Layer-Nh
Physical Description www.ti.com K002 Figure 7. Top Layer–NH TRF3703 Quadrature Modulator Evaluation Module SLWU042B – October 2006 – Revised August 2008 Submit Documentation Feedback... -
Page 13: Ground Plane L2
Physical Description www.ti.com K003 Figure 8. Ground Plane L2 SLWU042B – October 2006 – Revised August 2008 TRF3703 Quadrature Modulator Evaluation Module Submit Documentation Feedback... -
Page 14: Ground Plane L3
Physical Description www.ti.com K004 Figure 9. Ground Plane L3 TRF3703 Quadrature Modulator Evaluation Module SLWU042B – October 2006 – Revised August 2008 Submit Documentation Feedback... -
Page 15: Layer 4-Bottom Layer
Physical Description www.ti.com K005 Figure 10. Layer 4—Bottom Layer SLWU042B – October 2006 – Revised August 2008 TRF3703 Quadrature Modulator Evaluation Module Submit Documentation Feedback... -
Page 16: Layer 4-Bottom Layer-Nh
Physical Description www.ti.com K006 Figure 11. Layer 4—Bottom Layer–NH TRF3703 Quadrature Modulator Evaluation Module SLWU042B – October 2006 – Revised August 2008 Submit Documentation Feedback... -
Page 17: Drill Pattern
Physical Description www.ti.com 10 mil 0.254 mm 12 mil 0.3048 mm 13 mil 0.3302 mm 37 mil 0.9398 mm Total D001 Figure 12. Drill Pattern SLWU042B – October 2006 – Revised August 2008 TRF3703 Quadrature Modulator Evaluation Module Submit Documentation Feedback... -
Page 18: Parts List
Circuit Description www.ti.com Parts List Table 1. Bill of Materials for TRF3703 EVM Value Footprint Part Number Vendor Digi-Key Number REF DES Installed Tantalum 4.7-µF, 3216 T491A475K010AS KEMET 399-1561-1-ND C6, C7 10-V, 10% capacitor 1000-pF, 50-V, ECJ-1VC1H102J Panasonic PCC2151CT-ND C4, C5 5% capacitor 100-pF, 50-V, 5% ECJ-1VC1H101J... -
Page 19: Circuit Board
Circuit Board www.ti.com Circuit Board This chapter shows the circuit board test points. +5 V +5 V BBIN BBIP RF_OUT 50 W BBQP BBQN K001 Figure 13. Silkscreen Top Layer SLWU042B – October 2006 – Revised August 2008 TRF3703 Quadrature Modulator Evaluation Module Submit Documentation Feedback... -
Page 20: Schematic
Schematic www.ti.com Schematic This chapter shows the EVM schematic. SMA_END SMA_END 2POS_JUMPER 2POS_JUMPER 1000 pF 1000 pF 4.7 F 4.7uF SMA_END VCCMOD 100 pF RF_OUT RF_OUT SMA_END 100 pF TRF3703 0.1 F 0.1 F (Note 1) (Note 1) SMA_END 100 pF SMA_END SMA_END S0214-01... - Page 21 EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
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Page 22: Important Notices
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.