Texas Instruments TRF2443 User Manual
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Texas Instruments TRF2443 User Manual

Texas Instruments TRF2443 User Manual

Integrated if transceiver evaluation module
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TRF2443 Integrated IF Transceiver Evaluation Module
This document provides an easy guide for evaluating the TRF2443 integrated IF transceiver for broadband
wireless applications. Included in this guide are equipment setup procedures, software GUI configurations,
and test procedures that allow a user to quickly and accurately measure the TRF2443 performance.
The TRF2443 is a fully integrated IF transceiver operating at a transmitter IF of 340 MHz (or 170 MHz)
and a receiver IF of 140 MHz (or 280MHz). The IF transceiver is used to for up-conversion of signals from
the transmit chain digital-to-analog convertor (DAC) to the RF upconverter device and for
down-conversion of received IF signals to baseband for processing by the analog-to-digital convertor
(ADC). The receiver allows for switching in an external SAW filter if needed or by-passing this filter and
processing the signal completely internally. The TRF2443 also provides an Auxiliary Receiver which can
be used for cross-polarization interference cancellation (XPIC). This document describes how to test the
TRF2443 as well as the many options for trimming the device configuration to meet your application
needs.
RXAGC
AGC
CNTL
IFAMP
RX_IN
Temperature
TEMPOUT
Sensor
VCCs
From SPI
TX_OUT
GNDs
TX_PWD
SLWU065 – September 2009
Submit Documentation Feedback
IF SAW
IF_OUT
IF_IN
RX VGA
7
TX VGA
Level
Detect
Figure 1. TRF2443 Block Diagram
XPIC
XPIC
AGC
OUT
XPIC_IN
0/90
from RXPLL
0/90
RXPLL
TXPLL
0/90
TRF2443 Integrated IF Transceiver Evaluation Module
User's Guide
SLWU065 – September 2009
XPIC_BBI
XPIC_BBQ
RXBBI
RXBBQ
CLKSPI
S
DATASPI
P
3
LESPI
I
TXI_IN
TXQ_IN
1

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Summary of Contents for Texas Instruments TRF2443

  • Page 1: Trf2443 Block Diagram

    TRF2443 performance. The TRF2443 is a fully integrated IF transceiver operating at a transmitter IF of 340 MHz (or 170 MHz) and a receiver IF of 140 MHz (or 280MHz). The IF transceiver is used to for up-conversion of signals from...

  • Page 2: Table Of Contents

    XPIC Receiver ....................... GUI Overview ....................GUI for Synthesizers ....................GUI for Receiver ....................GUI Transmitter ................... GUI for XPIC Receiver ................... TRF2443 EVM Operating Procedures ......................Power Up ......................Receiver ....................XPICOUT Amplifier ......................Transmitter ......................EEPROM ....................XPIC RECEIVER .......................
  • Page 3 Read I/Q Carrier Leakage Trim Values B<10,5> ....................TX Carrier Leakage Trim .................... XPIC Receiver Max Gain GUI ..................... XPIC Receiver Min Gain GUI ....................TRF2443 EVM Top Layer ......................Schematic (1 of 5) ......................Schematic (2 of 5) ......................Schematic (3 of 5) ......................

  • Page 4: Evm Circuit Overview

    The TRF2443 EVM requires a 3.3V dc power-supply connected to between J1 (3.3V) and J2 (GND). The TRF2443 allows for analog or digital control of the transmitter power supply. Pin 1 (TXPWD) of the device provides the analog control and is connected to header JP1 (TXPWD) on the EVM. When pins 1 and 2 of header JP1 are shorted, 3.3V is fed to the TXPWD pin and the transmitter is disabled.

  • Page 5: Reference Clock

    Reference Clock The TRF2443 EVM allows for either an external reference chosen by the user or an internal oscillator at 20 MHz provided on the EVM board. If an external reference is to be used the signal should be fed into...

  • Page 6: Receiver

    EVM Circuit Overview www.ti.com Figure 5. TX Baseband Inputs Receiver The EVM is configured for single ended RX input signal via SMA connector J7 (RXIN). This input is taken through a 1:1 balun to provide differential inputs to the device. The device presents 50 so no external termination resistor is required.

  • Page 7: Rx Baseband Outputs

    EVM Circuit Overview www.ti.com The baseband I/Q signals can be measured balanced or unbalanced. The I output is taken from the unbalanced port J15 (RXBBI) through balun T5 or from the balanced ports of J13 (I+) and J18 (I-). Likewise, the Q output is taken from the unbalanced port J24 (RXBBQ) through balun T7 or the balanced ports of J21 (Q+) and J26 (Q-).

  • Page 8: Saw Filter Path

    8). At this point, the user has the flexibility to insert a filter of choice outside the TRF2443 EVM. (The board does contain a place holder (FL1) for a SAW filter but is not populated. In this way, the user has the flexibility to use a filter of his choice).

  • Page 9: Xpic Receiver

    XPIC Receiver The TRF2443 provides an auxiliary receiver chain that can be used for cross-polarization interference cancellation purposes. The EVM is configured for a single-ended output signal (intended for the secondary XPIC RX path) at J33 (XPICOUT). The input to the XPIC receiver (from the XPICOUT of the secondary XPIC RX path) is available at SMA connector J32 (XPICIN).

  • Page 10: Gui Overview

    GUI Overview www.ti.com GUI Overview The TRF2443 EVM kit includes a graphical user interface for controlling the device. The GUI contains two tabs labeled "Quick-set" and "Advanced" (see Figure 10 Figure Figure 10. TRF2443 GUI Quick-Set Tab List of Tables SLWU065 –...

  • Page 11: Trf2443 Gui Advanced Tab

    GUI Overview www.ti.com Figure 11. TRF2443 GUI Advanced Tab Evaluation and testing of the device can be done entirely using on the "Quick-set" tab. The "Advanced" tab is used for debugging and specific optimization of the device if required by an application. Using the "Advanced"...

  • Page 12: Gui For Synthesizers

    GUI Overview www.ti.com When an input to the GUI is changed, the GUI should send this new value to the device automatically once the cursor has clicked on another field besides the field being changed. It is good practice, however, to reload all registers once changes to inputs have been made.
  • Page 13 GUI does not perform this task. TX Synth Range The TRF2443 transmitter LO can be programmed to a frequency between 165–175MHz or 330–350MHz. Select the range that covers the desired to program the appropriate dividers. RX Synth Range The TRF2243 receiver LO can be programmed to a frequency between 140–165MHz or 280–330MHz.

  • Page 14: Gui For Receiver

    If RX LPF Bypass is OFF then the low pass filter is enabled and its corner frequency can be programmed to any of 128 states specified to cover 2 MHz to 11MHz corner frequency [see TRF2443 datasheet for detailed explanation (SLWS217)] RX BB 3dB Attn Specify whether to enable a 3 dB attenuator at the output of the device.

  • Page 15: Gui Transmitter

    Enables the path for looping back the TX signal into the receiver with a 0 dB loss or a 20 dB loss in the path depending on selection. This can be used for calibrating the RX baseband low pass filter corner frequency or calibrating the TX modulator LO leakage calibration [see TRF2443 datasheet for detailed explanation (SLWS217)].

  • Page 16: Trf2443 Evm Operating Procedures

    TRF2443 EVM Operating Procedures www.ti.com TRF2443 EVM Operating Procedures This section will outline step by step the procedures necessary to test the following functions of the TRF2443: Power Up a. Initial ICC Apply 3.3V DC between J1 and J2 connections on board.

  • Page 17: Receiver

    800-ohms to 50-ohms resulting in a 12dB loss factor. There is an additional 1-dB of losses in the path. Therefore, -4dBm at the output of the TRF2443 will be -17dBm at the 50-ohm input of the spectrum analyzer. Gain is calculated as Power at the spectrum analyzer + 13dB - Pin.

  • Page 18: Xpicout Amplifier

    800-Ω to 50-Ω resulting in a 12dB loss factor. There is an additional 1-dB of losses in the path. Therefore, -4dBm at the output of the TRF2443 will be -17dBm at the 50-Ω input of the spectrum analyzer. Gain is calculated as Power at the spectrum analyzer + 13dB - Pin.

  • Page 19: Transmitter

    TRF2443 EVM Operating Procedures www.ti.com Figure 24. Receiver XPICOUT GUI Settings iii. Apply CW signal to J7 (RXIN) port at 140MHz, -32dBm. iv. Measure output on spectrum analyzer at J15 (RXBBI) or J24 (RXBBQ) at 100kHz. v. Adjust RX AGC voltage until -17dBm is measured at spectrum analyzer (corresponds to -4dBm at TRF2443 output).

  • Page 20: Eeprom

    EEPROM a. The purpose of this section is to Readback EEPROM content and verify EEPROM contains the stored trim values to optimize TX Carrier leakage. See TRF2443 EEPROM User's Guide for detailed explanation of the EEPROM within the TRF2443 (SLWU064)].

  • Page 21: Xpic Receiver

    TRF2443 EVM Operating Procedures www.ti.com Figure 29. Read I/Q Carrier Leakage Trim Values B<10,5> vi. Record the decimal equivalent of REG 1<10,5> as the Q-trim data and the decimal equivalent of REG2<10,5> as the I-trim data (in this example I=45 and Q=2).

  • Page 22: Xpic Receiver Max Gain Gui

    TRF2443 EVM Operating Procedures www.ti.com Figure 31. XPIC Receiver Max Gain GUI iii. Apply CW signal to J32 (XPICIN) of 140.1 MHz, -32dBm. iv. Measure output at 100kHz at J16 (XPICI) or J25 (XPICQ) on a spectrum analyzer. v. Calculate Gain = (Pout at spectrum analyzer + 13) - Pin. Typical gain value should be greater than 25dB.

  • Page 23: Physical Description

    ASSEMBLY TOP COMPONENT SIDE (S01) TRF2443 REV C RXLOTEST IFIN XPICOUT RXBBI RXBBQ IFOUT XPICIN XPICBBI RXIN TXOUT XPICBBQ TXLOTEST REFIN TXBBQN TXBBQP TXBBIN TXBBIP Figure 33. TRF2443 EVM Top Layer SLWU065 – September 2009 List of Tables Submit Documentation Feedback...

  • Page 24: Bill Of Materials

    Physical Description www.ti.com Bill of Materials Table 1. Bill of Materials Item Part Reference Value PCB Footprint Mfr_Name Mfr_Part_Number Note C1 C14 C18 C21 0.1µF 0402 PANASONIC ECJ-0EB1C104K C29 C33 C36 C51 C52 C61 C64 C65 C66 C67 C72 C73 680pF 0402 MURATA...
  • Page 25 KEYSTONE 5001 TP5 TP6 TP7 TP8 RED TP_THVT_100_RND KEYSTONE 5000 TP9 TP12 TP13 TP14 TP15 TP16 TP17 TP18 TP19 TP20 TP21 TP22 TP23 TP24 TRF2443 SOCKET QFP QFP_80_OZTEK_0P50MM_CUSTOM Texas Instruments TRF2443 FT245RL ssop_28_413x220_26 FTDI Chip FT245RL TLV5638-EP SOIC_8_197X157_50 TLV5638QDREP W1 W2 W3 W4...

  • Page 26: Schematics

    Physical Description www.ti.com Schematics Figure 34. Schematic (1 of 5) List of Tables SLWU065 – September 2009 Submit Documentation Feedback...
  • Page 27 Physical Description www.ti.com Figure 35. Schematic (2 of 5) SLWU065 – September 2009 List of Tables Submit Documentation Feedback...
  • Page 28 Physical Description www.ti.com Figure 36. Schematic (3 of 5) List of Tables SLWU065 – September 2009 Submit Documentation Feedback...
  • Page 29 Physical Description www.ti.com Figure 37. Schematic (4 of 5) SLWU065 – September 2009 List of Tables Submit Documentation Feedback...
  • Page 30 Physical Description www.ti.com Figure 38. Schematic (5 of 5) List of Tables SLWU065 – September 2009 Submit Documentation Feedback...
  • Page 31 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.
  • Page 32 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments TRF2443EVM...

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