Texas Instruments TRF3711xxEVM (Rev. B) User guide

Brand: Texas Instruments

Model: TRF3711xxEVM (Rev. B)

Category: Security device components

Type: User guide

User's Guide

SLWU069B–February 2010–Revised November 2010

TRF3711xxEVM

space

Contents

1 Introduction .................................................................................................................. 2

1.1 Overview ............................................................................................................ 2

1.2 EVM Frequency Configuration Options ......................................................................... 2

1.3 System Block Diagram ............................................................................................ 2

2 Software Control ............................................................................................................ 3

2.1 Installation Instructions ............................................................................................ 3

2.2 Software Operation ................................................................................................ 3

3 EVM Test Configuration .................................................................................................... 5

3.1 Test Block Diagram ................................................................................................ 5

3.2 Test Equipment ..................................................................................................... 5

3.3 Calibration ........................................................................................................... 5

4 Basic Test Procedure ....................................................................................................... 5

4.1 DC Test .............................................................................................................. 5

4.2 Basic RF Test ...................................................................................................... 6

4.3 Advanced RF Test ................................................................................................. 6

5 Optional Configurations .................................................................................................... 8

5.1 Mixer Outputs ....................................................................................................... 8

5.2 Common-Mode Voltage ........................................................................................... 8

5.3 DC Offset Control .................................................................................................. 8

5.4 Analog Gain Control ............................................................................................... 8

5.5 Analog Device Disable ............................................................................................ 8

6 Schematics ................................................................................................................... 8

List of Figures

1 System Block Diagram..................................................................................................... 2

2 TRF3711xx GUI Front Panel .............................................................................................. 3

3 Test Setup Block Diagram................................................................................................. 5

4 TRF371125 with ADS62P42 WiMAX 3.5-MHz Signal EVM Performance .......................................... 7

List of Tables

1 TRF3711xx Device Frequencies and Recommended Baluns ........................................................ 2

2 Frequency Allocations...................................................................................................... 6

All trademarks are the property of their respective owners.

SLWU069B–February 2010–Revised November 2010 TRF3711xxEVM

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TRF3711xx

LNA

TRF3761

ADS62P42

Introduction

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1 Introduction

1.1 Overview

This document is the user’s guide for the TRF3711xxEVM. The TRF3711xx is a receiver direct

downconvert quadrature demodulator that includes programmable baseband filters, adjustable dc offset

correction, and buffer amplifiers to directly drive ADCs. The device is suited for operation with WCDMA,

WiMAX, and LTE modulation as well as with other high-bandwidth signal modulation schemes.

Note: Unless otherwise noted, the abbreviations TRF3711xxEVM and TRF3711xx are used in this

document to refer to all members of this device family (including the TRF371109, TRF371125, and

TRF371135). Table 1 summarizes the TRF3711xx device frequency options and lists the recommended

balun for each device.

Table 1. TRF3711xx Device Frequencies and Recommended Baluns

(1)

Frequency Device Recommended Balun

700 MHz TRF371109, TRF371125 Murata LDB21897M05C

880 MHz TRF371109, TRF371125 Murata LDB21881M05C

940 MHz TRF371109, TRF371125 Murata LDB21942M05C

1740 MHz TRF371125, TRF371135 Murata LDB211G8005C

1950 MHz TRF371125, TRF371135 Murata LDB211G9005C

2025 MHz TRF371125, TRF371135 Murata LDB211G9005C

2500 MHz TRF371125, TRF371135 Murata LDB212G4005C

3550 MHz TRF371125, TRF371135 Johanson 3600BL14M050E

5400 MHz TRF371135 Johanson 5400BL15B050E

(1)

There is considerable overlap in the operating frequency range of the TRF3711xx family of devices.

Refer to the specific device data sheet and compare performance parameters at the frequencies of

interest to select the best part for a particular application.

1.2 EVM Frequency Configuration Options

The TRF3711xx device is inherently broadband; however, the RF input and LO input require differential

input, which is generally achieved with the use of an RF balun. The EVM can be configured with a

different balun to facilitate operation in the desired band. Inspect the board at R101 to R105 to determine

which balun is populated on the board.

1.3 System Block Diagram

The basic radio system block diagram in Figure 1 demonstrates where the TRF3711xx fits in the overall

receiver architecture. The bold box highlights the TRF3711xx device.

Figure 1. System Block Diagram

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Software Control

2 Software Control

2.1 Installation Instructions

1. Open the folder named TRF3711_Installer_vxpx (xpx represents the latest version).

2. Run Setup.exe.

3. Follow the on-screen instructions.

4. Once installed, launch by clicking on the TRF3711_GUI_Verxpx program.

5. When plugging in the USB cable for the first time, you will be prompted to install the USB drivers.

(a) When a pop-up screen opens, select Continue Downloading.

(b) Follow the on-screen instructions to install the USB drivers.

2.2 Software Operation

The front panel control is shown in Figure 2. The registers are set in the respective default configurations.

This section describes the functionality of the control registers.

Figure 2. TRF3711xx GUI Front Panel

2.2.1 Register 1

● BB Gain: The programmable-gain amplifiers (PGA) setting; range is 0 to 24.

● LPFAdj: Sets the bandwidth of the BB filters. Setting 0 is maximum (bandwidth ≥ 15

MHz); setting 255 is minimum (BW ≤ 700 kHz). See the specific device

data sheet for comprehensive curves.

● EN_FastGain: Enables the fast-gain option to adjust PGA gain with external bits

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Software Control

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● Gain Select: Selects whether each bit in the fast-gain control is either 1 dB or 2 dB.

● 3 dB Attn: Engages the 3-dB attenuator at the baseband output.

● Det Filter Selects the internal detector filter used in dc offset calibration.

● RF Pwd Enables SW-controlled power down of RF stages inside device.

● BUF Pwd Enables power down on test buffer for mixer output; default is powered

down.

● Osc_Test Enables dc offset oscillator to the READBACK pin on the TRF3711.

● DC_OFF_DIG Pwd Enables SW-controlled power down of dc offset-correction circuitry.

2.2.2 Register 2

● Auto Cal Manual mode allows the dc offset DACs to be user-configurable; Auto mode uses

the internally stored values.

● En Auto Cal: When toggled, an Auto Cal is initiated. Note, Auto Cal must be in Auto mode.

● IQ DAC: Shows the setting of the dc offset I and Q DAC when in manual mode; range is 0

to 255.

● Cal Clk Sel: Toggle between using an externally supplied SPI clock or internal oscillator clock.

● Osc. Freq. Selects the oscillator frequency for the internal clock.

● Clk Div Sets the clock divider if the control clocks must be slowed down. Value chosen in

conjunction with Det Filter setting for optimal averaging.

● IDet: Selects the resolution of the I and Q DAC.

2.2.3 Register 3

● I/QLoadA/B: Selects the mixer gain for the differential BB paths. Typically, modification of these

registers is not required, but they can be tweaked for minor I/Q amplitude

adjustment.

● Filter Ctrl: Trims the peaking response of the BB LPF response.

● Bypass Engages the bypass feature of the BB LPF.

2.2.4 Register 5

● Mix GM Trim No adjustment of this register required.

● Mix LO Trim No adjustment of this register required.

● LO Trim No adjustment of this register required.

● Mix Buff Trim No adjustment of this register required.

● Filter Trim No adjustment of this register required.

● Out Buff Trim No adjustment of this register required.

2.2.5 Misc Settings

● Reset USB: Toggle this button if the USB port is not responding. This generates a new USB

handle address.

● Show Bytes: Shows the 32-bit word that is sent for each register.

● Stop Stops the program.

TRF3711xxEVM SLWU069B–February 2010–Revised November 2010

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DUT

SignalGenerator

Power

Supply

Spectrum Analyzer

J 7

J11 J12

Gnd

Computer

Terminal

J10

SignalGenerator

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EVM Test Configuration

3 EVM Test Configuration

3.1 Test Block Diagram

The test setup for general testing of the TRF3711xx is shown in Figure 3.

Figure 3. Test Setup Block Diagram

3.2 Test Equipment

The following equipment is required for completing RF testing:

● Power supply with current readout (Agilent E3631 or equivalent)

● Signal generator for input signal (Agilent E4438C or equivalent)

● Signal generator for LO signal (Agilent E4438C or equivalent)

● Spectrum analyzer (Agilent E4440A or equivalent)

● Programming computer

3.3 Calibration

The RF cables should be good-quality RF cables because of the high-frequency signals.

NOTE: There is approximately 1 dB of insertion loss for the input traces and balun on the printed

circuit board (PCB).

• Measure the insertion loss of the RF input cable and use this value to compensate for the desired input

power.

• Measure the insertion loss of the LO input cable and use this value to compensate for the desired LO

power.

• BB loss factor: If using the onboard transformers to interface with 50-Ω test equipment, then there is

approximately 12 dB of loss associated with the voltage transformation and transformer loss.

4 Basic Test Procedure

This section outlines the basic test procedure for testing the EVM. This section is divided into three test

sections: DC Test, Basic RF Test, and Advanced RF Test. The first section requires only power supply

with current readout and a computer for programmability. The second section requires basic RF test

equipment and basic technical know-how. The third section is for reference and requires specialized

equipment and setup. Only Section 4.1 and Section 4.2 are required to ensure basic functionality.

4.1 DC Test

1. Connect +5 V to J11; connect ground to J12.

2. Engage power supplies.

3. Verify current is 385 mA ± 25 mA.

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Basic Test Procedure

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4.2 Basic RF Test

Determine which balun device is placed on the board by inspecting which jumper resistor is installed at the

R101 to R105 locations. This information determines the proper RF frequencies for which the board is

configured. Table 2 summarizes the frequency band allocations.

Table 2. Frequency Allocations

Band Frequency Band F_LO F_RF

1G9 1800 MHz to 2000 MHz 1.9 GHz 1.9 GHz

2G4 2.3 GHz to 2.7 GHz 2.4 GHz 2.4 GHz

3G5 3.5 GHZ to 3.8 GHz 3.5 GHz 3.5 GHz

1G7 1600 MHz to 1800 MHz 1.7 GHz 1.7 GHz

900M 700 MHz to 1000 MHz 900 MHz 900 MHz

1. Inject LO signal at J7 at F_LO frequency at 0 dBm. Compensate for RF cable losses, including about 1

dB for input balun and transmission line losses.

2. Verify USB cable is connected.

3. Launch TRF3711_GUI_vxpx.

4. Toggle Auto Cal En on the GUI to complete a dc offset calibration.

5. Monitor the dc voltage are TP2 (IA) and TP7 (IB) and between TP10 (QA) and TP12 (QB) and verify

that the dc offset voltage is 0 ±35 mV.

6. Inject RF signal at J6 at F_RF + 300 kHz at –40 dBm. Compensate for cable loss including about 1 dB

for input transmission line losses and balun.

7. Connect spectrum analyzer at J3 (I).

8. Set Spectrum analyzer center frequency to 300 kHz:

(a) Set span to 500 Hz.

(b) Set reference level to 0 dBm.

(d) Set RBW to 3 Hz.

(e) Set VBW to 10 Hz.

9. Measure the signal at 300 kHz and verify signal at –12 dBm ±4 dB; note there is at least 12 dB of loss

associated through the onboard transformer. Also note that the device gain depends on the frequency,

and thus the output levels differ, depending on the frequency of the test.

10. Adjust BB gain to 20; verify signal reduces 4 dB ±1 dB.

11. Switch output cable to J10 (Q) and repeat the basic RF test beginning with Step 9..

4.3 Advanced RF Test

The EVM is equipped with the differential outputs going to a 16:1 transformer for interfacing with 50-Ω test

equipment. This configuration is suitable for completing basic RF test evaluation of the device; however,

the inherent high-pass nature of a transformer limits performance at frequencies close to dc. As a result,

this configuration is not suitable for analyzing true modulated signals. As an alternative, the ports at J2/J4

and J8/J13 offer direct access to the driver amplifier outputs for the differential I and Q signals,

respectively. Note, these ports cannot drive 50-Ω test equipment directly. For best performance, the

connections to the transformer should be severed by removing jumpers at W4, W5, W6, and W7.

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Basic Test Procedure

These ports can drive into an ADC directly or into a high-impedance differential amplifier. These ports are

dc-coupled to provide the proper common-mode offset voltage to the ADC. The typical EVM performance

of the device using a modulated 3.5-MHz wide WiMAX signal captured by the ADC is shown in Figure 4.

Figure 4. TRF371125 with ADS62P42 WiMAX 3.5-MHz Signal EVM Performance

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Optional Configurations

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5 Optional Configurations

5.1 Mixer Outputs

The mixer outputs can be fed directly to the transformers and to ports J5 and J9. This can be useful for

measuring the RF performance of the mixer itself without the PGAs or filters. This feature is implemented

by toggling the BUF Pwd to Off.

5.2 Common-Mode Voltage

The common-mode voltage is set to a static 1.5 V by a resistor-divider network. Note, the common-mode

voltage is shifted if the input supply is not 5 V. Alternatively, this can be controlled via a potentiometer by:

• Removing R17, R18

• Placing 0-Ω jumper at R19

• Adjusting potentiometer R20.

When cascading the device with an ADC it may be desirable to feed the common-mode voltage from the

ADC to the device. This can be accomplished by:

• Removing shunt at W3

• Placing ADC common-mode voltage at TP9

5.3 DC Offset Control

The easiest way to manage the dc offset control is to use the Auto Cal function. This is accomplished by

setting Auto Cal to Auto and toggling the Auto Cal En switch. Monitor the dc offset voltage at TP2 (IA) and

TP7 (IB) and between TP10 (QA) and TP12 (QB) and verify that the procedure worked sufficiently.

The detection filter is typically set to 1 kHz and the clock divider is set to 1024. With this configuration the

dc offset calibration is most accurate and can be enabled with the RF signal present. If the RF input signal

is disabled during the auto-cal procedure, then the detection filter bandwidth can be 10 MHz and the clock

divider reduced to a value of 16. Other combinations of detector filter and clock divider are possible,

depending on accuracy required and convergence time required.

Alternatively, this function can be accomplished by manually programming the I and Q DAC registers.

Toggle Auto Cal to Manual. Adjust the I and Q DAC registers on the GUI directly. Monitor the dc offset

values at TP2 (IA) and TP7 (IB) and between TP10 (QA) and TP12 (QB) until the dc offset is as close to 0

mV as possible.

5.4 Analog Gain Control

The device is equipped with three bits to control the PGA gain to facilitate an analog gain-control loop that

does not require the use of SPI. To use this function, set the EN_FastGain to ON. Then adjust for the gain

through the binary combination of bits B0, B1, B2 that can be toggled at DIP switch SW1. For example, if

the BB gain is set to 24 and the binary bits are set to b101, then the equivalent gain setting is 24 – 5 = 19.

If the GainSelect is set to 2×, then the equivalent gain setting for the previous example is

24 – 2 × 5 = 14.

5.5 Analog Device Disable

The TRF3711xx can be disabled by removing the jumper at W2.

6 Schematics

Schematics for the TRF3711xxEVM are appended to this document.

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REVISION HISTORY

Changes from A Revision (March, 2010) to B Revision ................................................................................................. Page

• Added TRF371109 device to products supported by EVM ......................................................................... 1

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

SLWU069B–February 2010–Revised November 2010 Revision History

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D D

C C

B B

A A

+5V +5V

+5V

VOFFI SH2 VOFFQ SH2

CLOCK SH2

DATA SH2

STROBE SH2

RDBK SH2

BBQPSH2

BBQNSH2

BBINSH2

BBIPSH2

LO_PSH2

LOpp SH2

LOnn SH2RFINp SH2

RFINn SH2

RF_INSH2

Title

Size Document Number Rev

Date: Sheet

TRF371X EVM-SCH

TRF371X EVM

12Monday, December 14, 2009

Title

Size Document Number Rev

Date: Sheet of

TRF371X EVM-SCH

TRF371X EVM

12Monday, December 14, 2009

Title

Size Document Number Rev

Date: Sheet of

TRF371X EVM-SCH

TRF371X EVM

12Monday, December 14, 2009

JV SMITH

12500 TI Boulevard. Dallas, Texas 75243

Engineer:

Drawn By:

R. HOPPENSTEIN

DC POWER PORT

1G9

2G5

3G5

1G7

900M

TRF3710

TRF3711

USB_B_S_F_B_TH

USB_CONN

USB_B_S_F_B_TH

USB_CONN

VCC

-DATA

+DATA

GND

GND1

GND2

TTWB-16-BL

5 2

C33

.1uF

C33

.1uF

Z_SCREW1

SCREW PANHEAD 4-40 x 3/8

Z_SCREW1

SCREW PANHEAD 4-40 x 3/8

R24

10K

R24

10K

1 3

R103 0

DNI

R103 0

DNI

SHUNTSHUNT

TP4

RED

TP4

RED

R50 R50

MSA

DEN

SMA_THVT

MSA

DEN

SMA_THVT

5234

MSA

DEN

J13

SMA_THVT

MSA

DEN

J13

SMA_THVT

5234

R107 0R107 0

Z_SCREW4

SCREW PANHEAD 4-40 x 3/8

Z_SCREW4

SCREW PANHEAD 4-40 x 3/8

.1uF

R106 0

DNI

R106 0

DNI

MSA

DEN

J10

SMA_END_LAUNCH

MSA

DEN

J10

SMA_END_LAUNCH

5234

.01uF

2.2uF

J11

RED

+5V

J11

RED

+5V

15K

MT1MT1

TP12

RED

TP12

RED

W7W7

120

FB7

120

FB7

LED BLUE

1 2

TP3

RED

TP3

RED

J12

BLK

GND

J12

BLK

GND

R104 0

DNI

R104 0

DNI

MT2MT2

SHUNTSHUNT

10K

TRF3710 = INSTALL

TRF3711 = DNI

10K

TRF3710 = INSTALL

TRF3711 = DNI

TTWB-16-BL

5 2

R102 0R102 0

.1uF

R105 0

DNI

R105 0

DNI

MT3MT3

10K

1 3

MSA

DEN

SMA_THVT

MSA

DEN

SMA_THVT

5234

W4W4

Z_SCREW3

SCREW PANHEAD 4-40 x 3/8

Z_SCREW3

SCREW PANHEAD 4-40 x 3/8

MT4MT4

C36

2.2uF

C36

2.2uF

TP7

RED

TP7

RED

47pF

TP10

RED

TP10

RED

TP2

RED

TP2

RED

W5W5

ETC1-1-13

DNI

ETC1-1-13

DNI

4 3

120

FB6

120

FB6

SHUNTSHUNT

120

FB1

120

FB1

MSA

DEN

SMA_END_LAUNCH

MSA

DEN

SMA_END_LAUNCH

5234

TP11

BLK

GND

TP11

BLK

GND

TP5

RED

TP5

RED

C35

1uF

C35

1uF

C34

2.2uF

C34

2.2uF

.1uF

2.2uF

TP6

RED

TP6

RED

Z_SCREW2

SCREW PANHEAD 4-40 x 3/8

Z_SCREW2

SCREW PANHEAD 4-40 x 3/8

R101 0

DNI

R101 0

DNI

R250 R250

R230 R230

47pF

FT245RL

USBDM

USBDP

VCCIO

NC1

RESET

NC2

OSCI

OSCO

3V3OUT

AGND

GND

TEST

PWREN

TXE

RXF

VCC

W6W6

R90 R90

ETC1-1-13

DNI

ETC1-1-13

DNI

4 3

TP1

BLK

GND

TP1

BLK

GND

MSA

DEN

SMA_THVT

MSA

DEN

SMA_THVT

5234

R22

10K

TRF3710 = INSTALL

TRF3711 = DNI

R22

10K

TRF3710 = INSTALL

TRF3711 = DNI

SHUNTSHUNT

D D

C C

B B

A A

MIXp

MIXn

CHIP_EN

MIXQOUTP

MIXQOUTN

MIXIOUTN

MIXIOUTP

MIXinp

MIXinn

LOIP

LOIN

VCC

CHIP_EN

VCCMIX

LOp

LOn

VCCMIX

+5V

BBQP SH1

BBQN SH1

BBIN SH1

BBIP SH1

CLOCKSH1

DATASH1

STROBESH1

VOFFQ SH1

RDBKSH1

LOnn SH1

LOpp SH1

RFINpSH1

VOFFI SH1

RF_IN SH1

LO_P SH1

RFINn SH1

Title

Size Document Number Rev

Date: Sheet

TRF371X EVM-SCH

TRF371X EVM

22Monday, December 14, 2009

Title

Size Document Number Rev

Date: Sheet of

TRF371X EVM-SCH

TRF371X EVM

22Monday, December 14, 2009

Title

Size Document Number Rev

Date: Sheet of

TRF371X EVM-SCH

TRF371X EVM

22Monday, December 14, 2009

12500 TI Boulevard. Dallas, Texas 75243

Mfg_Kit_B 2G5

Mfg_Kit_A 1G9

DUAL FOOTPRINT

NOTE 1:

MURATA LDB211G9005C

CAP RF BALUN

11 PLACES

MURATA LDB212G4005C

10pF

4.7pF

JOHANSON 3600BL14M050E

MURATA LDB211G8005C

3.9pF

10pFMfg_Kit_D 1G7

Mfg_Kit_C 3G5

MURATA LDB21942M05C

22pFMfg_Kit_E 900M

SEE NOTE 1

R30

TRF3711 = DNI

TRF3710 = INSTALL

R30

TRF3711 = DNI

TRF3710 = INSTALL

C18 10pFC18 10pF

C21 10pFC21 10pF

120

FB5

120

FB5

R15

DNI

R15

DNI

SHUNTSHUNT

C13 1000pFC13 1000pF

MSA

DEN

MSA

DEN

5234

120

FB8

120

FB8

TP9

RED

TP9

RED

120

FB2

120

FB2

MSA

DEN

SMA_THVT

MSA

DEN

SMA_THVT

5234

C12

.1uF

C12

.1uF

TP8

RED

TP8

RED

R11 0

DNI

R11 0

DNI

C10 2.2uFC10 2.2uF

TRF3711-XX/ (TRF3710)

GNDDIG

VCCDIG

CHIP_EN

VCCMIX1

GND1

MIXinp

MIXinn

GND2

VCCMIX2

NC1

NC2

GND3

GND4

GND5

GND6

MIXQoutp

MIXQoutn

BBQinn

BBQinp

REXT

VCCBIAS

GNDBIAS

NC3/(VOFFQ)

VCM/(VCMQ)

VCCBBQ

GND7

BBQoutn

BBQoutp

VCCLO

LOIN

LOIP

GND8

BBIoutp

BBIoutn

GND9

VCCBBI

(VCMI)/NC4

(VOFFI)/RDBK

GAIN_B2

GAIN_B1

GAIN_B0

BBIinp

BBIinn

MIXIoutn

MIXIoutp

STROBE

DATA

CLOCK

PAD

TTWB-16-BL

1 6

3 4

C14 10pFC14 10pF

120

FB3

120

FB3

MSA

DEN

MSA

DEN

5234

R33 0

DNI

R33 0

DNI

C19

1pF

DNI

C19

1pF

DNI

C32 2.2uFC32 2.2uF

R20

1 3

SHUNTSHUNT

DNI

C20 10pFC20 10pF

LDB211G9005C

4 3

C9 2.2uFC9 2.2uF

TTWB-16-BL

1 6

3 4

120

FB4

120

FB4

C30

.1uF

C30

.1uF

MSA

DEN

SMA_THVT

MSA

DEN

SMA_THVT

5234

C25

10pF

C25

10pF

10K

C29

.1uF

C29

.1uF

C22

1pF

DNI

C22

1pF

DNI

C31 2.2uFC31 2.2uF

C24 10pFC24 10pF

R13

24K

R13

24K

R31 0

TRF3710 = DNI

TRF3711 = INSTALL

DNI

R31 0

TRF3710 = DNI

TRF3711 = INSTALL

DNI

C17

10pF

C17

10pF

C28

1000pF

C28

1000pF

C23 10pFC23 10pF

R32 0

DNI

R32 0

DNI

R16

30K

R16

30K

R12

56K

R12

56K

W3W3

C27 .1uFC27 .1uF

R21

DNI

R21

DNI

SHUNTSHUNT

LDB211G9005C

1 6

R190

DNI

R190

DNI

R14

200K

R14

200K

10K

R17

56K

R17

56K

10K

R18

24K

R18

24K

C37

.1uF

C37

.1uF

W2W2

TRF3710 = INSTALL SHUNT

TRF3711 = DNI SHUNT

TRF3710 = INSTALL SHUNT

TRF3711 = DNI SHUNT

SW1

SPST

SW1

SPST

R10

1 3

C26

10pF

C26

10pF

C11

.1uF

C11

.1uF

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

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electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the

technical requirements of these directives or other related directives.

Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30

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TI assumes no liability for applications assistance, customer product design, software performance, or infringement of

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Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the

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FCC Warning

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. It generates, uses, and

can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15

of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this

equipment in other environments may cause interference with radio communications, in which case the user at his own expense

will be required to take whatever measures may be required to correct this interference.

EVM Warnings and Restrictions

It is important to operate this EVM within the input voltage range of 4.5 V to 5.5 V and the output voltage range of 0 V to 4 V .

Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are

questions concerning the input range, please contact a TI field representative prior to connecting the input power.

Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the

EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load

specification, please contact a TI field representative.

During normal operation, some circuit components may have case temperatures greater than 55° C. The EVM is designed to

operate properly with certain components above 55° C as long as the input and output ranges are maintained. These components

include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of

devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near

these devices during operation, please be aware that these devices may be very warm to the touch.

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Following are URLs where you can obtain information on other Texas Instruments products and application solutions:

Products Applications

Amplifiers amplifier.ti.com Audio www.ti.com/audio

Data Converters dataconverter.ti.com Automotive www.ti.com/automotive

DLP® Products www.dlp.com Communications and www.ti.com/communications

Telecom

DSP dsp.ti.com Computers and www.ti.com/computers

Peripherals

Clocks and Timers www.ti.com/clocks Consumer Electronics www.ti.com/consumer-apps

Interface interface.ti.com Energy www.ti.com/energy

Logic logic.ti.com Industrial www.ti.com/industrial

Power Mgmt power.ti.com Medical www.ti.com/medical

Microcontrollers microcontroller.ti.com Security www.ti.com/security

RFID www.ti-rfid.com Space, Avionics & www.ti.com/space-avionics-defense

Defense

RF/IF and ZigBee® Solutions www.ti.com/lprf Video and Imaging www.ti.com/video

Wireless www.ti.com/wireless-apps

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265

Texas Instruments TRF3711xxEVM (Rev. B) User guide

Brand: Texas Instruments

Model: TRF3711xxEVM (Rev. B)

Category: Security device components

Type: User guide

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Texas Instruments TRF3711xxEVM (Rev. B) User guide

Texas Instruments TRF3711xxEVM (Rev. B) User guide

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