Texas Instruments TRF6900 User Manual Download

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August 2000

Mixed-Signal RF Products

User’s Guide

SWRU001

查询SWRU001供应商

捷多邦，专业PCB打样工厂，24小时加急出货

Summary of Contents for TRF6900

Page 1: ...August 2000 Mixed Signal RF Products User s Guide SWRU001 PCB 24...

Page 2: ...this warranty Specific testing of all parameters of each device is not necessarily performed except those mandated by government requirements Customers are responsible for their applications using TI...

Page 3: ...s Chapter 1 Overview Chapter 2 Evaluation Board Chapter 3 Software User s Guide Information About Cautions and Warnings This user s guide may contain cautions and warnings This is an example of a caut...

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Page 5: ...2 6 2 Jumper Description 2 13 2 7 Connectors and Test Points 2 15 2 7 1 Connectors 2 15 2 7 2 Test Points TP 2 15 2 7 3 Adjustments 2 16 2 7 4 LED Indicators 2 16 3 Software User s Guide 3 1 3 1 Intro...

Page 6: ...6 Chip Layout Screen 3 11 3 7 Spectrum Analyzer 3 12 3 8 Input of Frequency Error 3 13 3 9 Main Panel Display After Clock Offset Is Applied 3 13 3 10 PLL Modulation Options View 3 14 3 11 PLL Modulat...

Page 7: ...Overview This chapter gives an overview of the TRF6900 evaluation module EVM Topic Page 1 1 Purpose 1 2 1 2 EVM Setup 1 2 1 3 Block Diagram 1 3 Chapter 1...

Page 8: ...desired LPT port of the PC LPT1 or LPT2 Step 4 Connect a dc power supply capable of 10 V 200 mA between the red power supply pin and ground on the TRF6900 evaluation board Step 5 Verify that the power...

Page 9: ...DEM_GND VREF DEM_VCC DEM_TANK DEM_TANK RSSI_OUT LNA_IN LNA_GND PA_VCC PA_OUT PA_GND PLL_GND PD_SET PD_OUT2 PD_OUT1 LOCKDET PLL_VCC VCO_TANK2 DDS_GND DDS_VCC STDBY MODE TX_DATA DIG_VCC DIG_GND GND XOS...

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Page 11: ...s the EVM and its operation Topic Page 2 1 Schematics 2 2 2 2 Parts List 2 6 2 3 EVM Voltage Setup 2 9 2 4 Serial Interface and PC Port Input 2 10 2 5 Standard PC Parallel Port 2 11 2 6 Jumper Connect...

Page 12: ...6 DNP TBD R25 DNP J7 EX_VCO_INPUT EX_VCO_INPUT R19 R21 120pF C31 10nH L8 3 3pF C33 3 3pF C34 TP1 1 2 V2 SMV1247 079 1 2 V1 SMV1247 079 470pF C29 C27 VCC1 4700pF C28 TBD R22 DNP 1000pF C30 VCC1 25 6 MH...

Page 13: ...3 TXDATA1 TXDATA MODE STDBY TXDATA R41 R40 R39 CR4 LL4148 1000pF C40 DNP STDBY MODE LL4148 CR2 LL4148 CR3 R37 VCC2 2 3 1 JP6 JP7 VCC2 R38 VCC2 R2 R36 LED2 ENABLE LN1471SY TR FMMT2222ATA Q2 19 10 k 10...

Page 14: ...Top Side Silkscreen and Drawing 2 1 1 Top Side Silkscreen and Drawing...

Page 15: ...Top Side Silkscreen and Drawing Evaluation Board 2 1 2 Bottom Side Silkscreen and Drawing...

Page 16: ...F 1208 tantalum Tantalum capacitor 1 C38 1 5 pF 10 pF 9341 Series Trimmer Capacitor Johnson 9341 3Sl Newark 95F9901 2 C9 C26 10 pF 0603 1 C41 10 F 1206 tantalum Tantalum capacitor 1 C24 12 pF 0603 2...

Page 17: ...akaway headers AMP 4 103239 0 Newark 90F7725 1 JP8 Jumper 2 pin Breakaway headers AMP 4 103239 0 Newark 90F7725 3 L1 L3 L5 2 2 H 1214 Surface mount inductor Murata LQS33N2R2G04M00 2 L2 L8 8 2 nH 0603...

Page 18: ...le output positive voltage regulator ON Semiconductor LM317MDT Newark 06F9320 1 VR2 SO6NB Three terminal adjustable output positive voltage regulator ON Semiconductor LM317LBD Newark 06F9304 1 ZR1 SMB...

Page 19: ...V at terminal 3 of LM317 should be 2 to 3 volts higher than Vout Connect JP8 For Power ON LED V 7 2 volts equal to 8 volts min to 10 volts max With V 1 2 4 R45 LED3 VCC LN1271R TR 0 JP8 R43 C43 C44 C4...

Page 20: ...22 9 21 8 20 7 6 18 5 P1 DB25M RXDATA RXDATA RSSI RXD RSSI_O RSSI_OUT R35 VCC2 C39 100 R27 R29 R28 STROBE DATA CLOCK 1 1OE 20 2 1A1 4 1A2 6 1A3 8 1A4 19 2OE 11 2A1 9 2Y1 12 1Y4 18 1Y1 16 1Y2 14 1Y3 1...

Page 21: ...4 Data 5 Data 6 Data 7 ACK Busy Paper Empty Select Auto Feed Error Initialize Printer Select Input PC Output PC Output PC Output PC Output PC Output PC Output PC Output PC Output PC Output PC Input P...

Page 22: ...PD_OUT1 LOCKDET PLL_VCC VCO_TANK2 DDS_GND DDS_VCC STDBY MODE TX_DATA DIG_VCC DIG_GND GND XOSC1 XOSC2 STROBE CLOCK DATA DATA_OUT S H_CA AMP_OUT AMP_CAP AMP_IN RSSI Serial Interface Direct Digital Synth...

Page 23: ...42 IF1_IN JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 JP1 Default is no connection JP7 Default is no connection BPF1 Bypass Capacitor Default is a 0 1 F Capacitor C3 JP6 Default is no connection To VCC2 To VCC2 T...

Page 24: ...to the loop filter of the PLL circuit The only reason to remove jumper JP5 is to test the tuning range of the VCO tank circuit with an external power supply The default state for jumper JP5 is JP5 1 t...

Page 25: ...le connector which is connected to the input of the LNA The LNA is the input to the receiver section of the TRF6900 J5 TX_OUT TX_OUT is an SMA female connector which is connected to the transmit ter o...

Page 26: ...the DATA signal from the PC STROBE TP The STROBE test point is used to monitor the STROBE signal from the PC TXDATA TP The TXDATA test point is used to monitor the transmitted data Transmit data from...

Page 27: ...bes the Windows based software application that accom panies the EVM Topic Page 3 1 Introduction 3 2 3 2 Main Program Screen 3 3 3 3 Chip Layout Screen 3 7 3 4 PLL Modulation Options Screen 3 8 3 5 Te...

Page 28: ...ware However if the operating system is Windows 95 98 the software application can run on its own Both the Windows NT Driver and the TRF6900 software are provided on dis kette Your system administrato...

Page 29: ...t View Computer Printer Port LPT1 or LPT2 Press to Program the TRF6900 NOTE When word bits are displayed in RED the Send Words Now F12 button on the main program screen must be pressed for changes to...

Page 30: ...strength signal indicator RSSI on or off 9 LIM Turns the limiter LIM on or off 10 IF Turns the intermediate frequency IF amplifier on or off 11 MIX Turns the mixer on or off 12 LNA Allows the low noi...

Page 31: ...vidually send each word Clicking on the Send Words Now F12 button on the main program screen or by pressing F12 on the keyboard sends all the words to the TRF6900 3 2 8 Operation Mode Operation Mode s...

Page 32: ...the arrow beside the box to turn LNA off set to High Gain mode or set to Low Gain mode Output Parameters Enable Click inside the box to turn the TRF6900 on or off TXData Click inside the box to switc...

Page 33: ...nable or Standby IC is Disabled in Standby Mode Select Icon to Change Position of Data Switch Between RSSI and FSK DEMOD Selecting Icon Will Turn LPF Video Amp On or Off Selecting Icon Will Turn Data...

Page 34: ...ssed by pressing the PLL Modula tion Option button located on the chip layout screen and is displayed as shown in Figure 3 3 Figure 3 3 PLL Modulation Options Screen DV6 Display Set to 1 by Double Cli...

Page 35: ...Word D on the main program screen and highlighted in green Furthermore Fout TX_Data High MHz Fout TX_Data Low MHz frequencies and their difference Delta Fout kHz are calculated and displayed Press the...

Page 36: ...testing the TRF6900 transmitter section set the main program screen and the chip layout screen as shown in Figure 3 5 and Figure 3 6 Figure 3 5 Main Program Screen Transmit Frequency Double Clicking...

Page 37: ...ing Figure 3 6 Chip Layout Screen Clicking Here Will Set Power Amp Attenuation 0 dB 10 dB 20 dB or Turn the Power Amp Off After setup is complete press the SendWords button on the chip layout screen o...

Page 38: ...4 Enter the difference value in the Freq Error box in the main program screen as shown in Figure 3 8 5 If difference value is negative enter sign followed by the difference value Example Frequency Co...

Page 39: ...Testing of Transmitter Software User s Guide Figure 3 8 Input of Frequency Error Figure 3 9 Main Panel Display After Clock Offset Is Applied...

Page 40: ...Start the FSK Modulation Test Select to Program the TRF6900 Select This Button With Mouse to Set FSK Frequency Set the DVx bits as shown in Figure 3 11 by double clicking inside each DVx box to set th...

Page 41: ...0 MHz FSK Deviation of 100 kHz Send Bits Button Press the Send Words button on the chip layout screen or the Send Words Now F12 on the main program screen Press the FSK Test button on the chip layout...

Page 42: ...2 frequency is the 1 frequency Figure 3 13 Block Diagram for Testing of the TRF6900 EVM Transmitter Section With an External Pulse Generator J5 PC With TRF6900 Software Installed PC Printer LPT1 or LP...

Page 43: ...ec tion In this new setup an external pulse generator is providing the modu lation The FSK Test button on the chip layout screen does not need to be pressed to start the FSK test Figure 3 14 FSK Outpu...

Page 44: ...Voltage 8 V Pulse Generator Output Waveform RX_IN Ground TP PC With TRF6900 Software Installed Power Supply P1 DB25M Male TRF6900 Evaluation Board PC Printer Port LPT1 or LPT2 10 kHz 3 6 1 Test Equip...

Page 45: ...Mode When Word Bits are Displayed in Red the Send Words Now F12 Button Must Be Pressed for Changes to Be Updated Note The receiver frequency of the TRF6900 is 915 000 MHz The TRF6900 is us ing a 10 7...

Page 46: ...C25 see schematic diagram to a dc voltage level Vref that is proportional to the average demodulation dc level Capacitor C25 is connected to terminal 29 of the TRF6900 S H_CA terminal During the Hold...

Page 47: ...ive data at the AMP_OUT and RXDATA test points for input signals at 50 dBm and 90 dBm respectively Figure 3 18 Measured Data With 50 dBm Input Signal at AMP_OUT and RXDATA Test Points AMP_OUT Test Poi...

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