Texas Instruments TRF2443 User Manual
AGC
CNTL
7
0/90TXPLL
3
RXAGC
VCCs
GNDs
RXPLL
TXQ_IN
TX_OUT
TXI_IN
RX_IN
RX VGA
TX VGA
IFAMP
From SPI
from RXPLL
XPIC_IN
XPIC
OUT
XPIC
AGC
XPIC_BBI
XPIC_BBQ
Level
Detect
IF SAW
IF_OUT
IF_IN
TX_PWD
Temperature
Sensor
CLKSPI
DATASPI
LESPI
RXBBI
RXBBQ
TEMPOUT
0/90
0/90
S
P
I
User's Guide
SLWU065 – September 2009
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.
SLWU065 – September 2009 TRF2443 Integrated IF Transceiver Evaluation Module 1
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Figure 1. TRF2443 Block Diagram
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Contents
1 EVM Circuit Overview ....................................................................................................... 4
1.1 DC POWER ......................................................................................................... 4
1.2 Reference Clock .................................................................................................... 5
1.3 Communications .................................................................................................... 5
1.4 Transmitter ........................................................................................................... 5
1.5 Receiver .............................................................................................................. 6
1.6 XPIC Receiver....................................................................................................... 9
2 GUI Overview ............................................................................................................... 10
2.1 GUI for Synthesizers .............................................................................................. 12
2.2 GUI for Receiver ................................................................................................... 14
2.3 GUI Transmitter.................................................................................................... 15
2.4 GUI for XPIC Receiver ........................................................................................... 15
3 TRF2443 EVM Operating Procedures ................................................................................... 16
3.1 Power Up ........................................................................................................... 16
3.2 Receiver ............................................................................................................ 17
3.3 XPICOUT Amplifier ............................................................................................... 18
3.4 Transmitter ......................................................................................................... 19
3.5 EEPROM ........................................................................................................... 20
3.6 XPIC RECEIVER .................................................................................................. 21
4 Physical Description ....................................................................................................... 23
4.1 EVM Top Layer Drawing ......................................................................................... 23
4.2 Bill of Materials .................................................................................................... 24
4.3 Schematics ......................................................................................................... 26
List of Figures
1 TRF2443 Block Diagram .................................................................................................... 1
2 TXPWD Header JP1 Schematic ........................................................................................... 4
3 EVM DC Power: J1, J2, and JP1 .......................................................................................... 4
4 EVM Reference Clock J3 and USB Port J5 .............................................................................. 5
5 TX Baseband Inputs ......................................................................................................... 6
6 J7 (RXIN) ..................................................................................................................... 6
7 RX Baseband Outputs ...................................................................................................... 7
8 SAW Filter Path .............................................................................................................. 8
9 XPIC RX ...................................................................................................................... 9
10 TRF2443 GUI Quick-Set Tab ............................................................................................. 10
11 TRF2443 GUI Advanced Tab ............................................................................................. 11
12 Load All Registers .......................................................................................................... 12
13 Reset USB .................................................................................................................. 12
14 Synthesizer Programming ................................................................................................. 12
15 RX GUI ...................................................................................................................... 14
16 RX AGC GUI ................................................................................................................ 14
17 Transmitter GUI............................................................................................................. 15
18 XPIC Receiver GUI ........................................................................................................ 15
19 XPIC AGC GUI ............................................................................................................. 15
20 Programmed ICC GUI Settings ........................................................................................... 16
21 Load All Registers .......................................................................................................... 16
22 Receiver SAW Disabled GUI Settings ................................................................................... 17
23 Receiver SAW Enabled GUI Settings ................................................................................... 18
24 Receiver XPICOUT GUI Settings ........................................................................................ 19
25 TX Max Gain GUI Settings ................................................................................................ 19
26 GUI Settings for TX Carrier Leakage .................................................................................... 20
27 GUI Show Readback ...................................................................................................... 20
2 List of Figures SLWU065 – September 2009
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28 GUI Select EEPROM Readback ......................................................................................... 20
29 Read I/Q Carrier Leakage Trim Values B < 10,5> ...................................................................... 21
30 TX Carrier Leakage Trim .................................................................................................. 21
31 XPIC Receiver Max Gain GUI ............................................................................................ 22
32 XPIC Receiver Min Gain GUI ............................................................................................. 22
33 TRF2443 EVM Top Layer ................................................................................................. 23
34 Schematic (1 of 5) .......................................................................................................... 26
35 Schematic (2 of 5) .......................................................................................................... 27
36 Schematic (3 of 5) .......................................................................................................... 28
37 Schematic (4 of 5) .......................................................................................................... 29
38 Schematic (5 of 5) .......................................................................................................... 30
List of Tables
1 Bill of Materials ............................................................................................................. 24
SLWU065 – September 2009 List of Tables 3
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GND
+3.3V
JP1
TXPWD
1
3
2
TXPWD
80
SHUNT 2-3
S006
EVM Circuit Overview
1 EVM Circuit Overview
1.1 DC POWER
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. When pins 2 and 3
of header JP1 are shorted, 0V is fed to the TXPWD pin and the transmitter is enabled (see Figure 2 and
Figure 3 ). With header JP1 enabling the transmitter, it is still possible for the transmitter to be off due to
the state of the digital TX control.
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Figure 2. TXPWD Header JP1 Schematic
List of Tables4 SLWU065 – September 2009
Figure 3. EVM DC Power: J1, J2, and JP1
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1.2 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
SMA connector J3 (EXTREF) and jumpers W1 and W12 should be removed (see Figure 4 ).
EVM Circuit Overview
Figure 4. EVM Reference Clock J3 and USB Port J5
1.3 Communications
The EVM is equipped with USB communications which provide the interface between a computer's USB
port and the TRF2443s SPI port via J5 as shown in Figure 4 . A CD containing the GUI to control the
TRF2443 is provided within the EVM kit. An overview of the GUI is provided in this document
1.4 Transmitter
The EVM is configured for differential I/Q input signals via four SMA connectors. For the upper sideband,
the I signals are connected to J12 (TXBBIP) and J17 (TXBBIN). The Q signals are connected to J23
(TXBBQN) and J20 (TXBBQP) (see Figure 5 ). SMA connector J6 (TXOUT), not shown below, is used to
monitor the RF output signal from the transmitter.
SLWU065 – September 2009 List of Tables 5
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RXIN
50 OHM DIFF
50 OHM
220pF220pF
RXINP
68
RXINN
69
GNDRX
70
GNDRX
71
VCCRX
67
220pF
S007
EVM Circuit Overview
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1.5 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.
6 List of Tables SLWU065 – September 2009
Figure 5. TX Baseband Inputs
Figure 6. J7 (RXIN)
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EVM Circuit Overview
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-). For balanced mode measurements, jumpers W3, W5, W7 and W9 must
be removed.
SLWU065 – September 2009 List of Tables 7
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Figure 7. RX Baseband Outputs
EVM Circuit Overview
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The TRF2443 RX path allows the use of an external SAW filter. An internal switch, which is programmable
through the serial interface, gives the flexibility to utilize the external filter (see Figure 1 ). The internal
switch is controlled via the serial programming interface through bit EN_SAW. By programming EN_SAW
to 1, the external path is selected, whereas a 0 engages the internal bypass switch. When EN_SAW is set
to 1 the IF signal will be routed out of the IC to SMA connector J30 (IFOUT) (see Figure 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). For initial evaluation, an 8-10 dB pad can be used in lieu of a filter to emulate the
insertion loss of a typical filter. The user must route the signal from J30 (IFOUT) to J31 (IFIN) with the filter
or pad included.
List of Tables8 SLWU065 – September 2009
Figure 8. SAW Filter Path
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1.6 XPIC Receiver
EVM Circuit Overview
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). This input is taken through a 1:1.5 balun to
provide differential inputs to the device. The device presents 75 so no external termination resistor is
required. The XPIC baseband I and Q signals can be measured balanced or unbalanced. The I output is
taken from the unbalanced port J16 (XPICI) through balun T6 or from the balanced ports of J14 (I+) and
J19 (I-). Likewise, the Q output is taken from the unbalanced port J25 (XPICQ) through balun T8 or the
balanced ports of J22 (Q+) and J27 (Q-). For balanced mode measurements, jumpers W4, W6, W8, and
W10 must be removed (see Figure 9 ).
SLWU065 – September 2009 List of Tables 9
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Figure 9. XPIC RX
GUI Overview
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2 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 and Figure 11 )
10 List of Tables SLWU065 – September 2009
Figure 10. TRF2443 GUI Quick-Set Tab
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