Texas Instruments TRF4900 User Manual
User’ s Gu ide
April 2001 Mixed-Signal RF Products
SWRU003B
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify , before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its products to the specifications applicable at the time of sale in accordance with
TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary
to support 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 components.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
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Also see: Standard Terms and Conditions o f S ale for S emiconductor P roducts.
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Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2001, Texas Instruments Incorporated
EVALUATION BOARD DISCLAIMER
The enclosed evaluation boards are experimental printed circuit boards and are therefore
only intended for device evaluation.
We would like to draw your attention to the fact that these boards have been processed
through one or more of Texas Instruments’ external subcontractors which have not been production qualified.
Device parameters measured, using these boards, are not representative of any final datasheet or o f a final production version. Texas Instruments does not represent or guarantee that
a final version will be made available after device evaluation.
THE EVALUATION BOARDS ARE SUPPLIED WITHOUT W ARRANTY OF ANY KIND, EXPRESSED, IMPLIED OR STATUTORY, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
TEXAS INSTRUMENTS ACCEPTS NO LIABILITY WHATSOEVER ARISING AS A RESULT
OF THE USE OF THESE BOARDS.
The fee associated with the evaluation modules (EVM) is a partial nonrecurring engineering
fee (NRE) to partially defray the engineering costs associated with the EVM development
and applications support for the RF integrated semiconductor product. The EVM is a tool for
evaluating the RF semiconductors supplied by Texas Instruments. The EVM is supplied to
prospective component customers to provide services and software allowing the prospect
customers to evaluate the RF semiconductors in products they would build.
The EVM may be operated only for product evaluation purposes and then only in nonresidential areas. TI’s understanding is that the customers’ products using the RF parts listed shall be
designed to comply with all applicable FCC and appropriate regulatory agency requirements
and will, upon testing, comply with these requirements. Operation of this device is subject to
the conditions that it not cause harmful interference and that it must accept any interference.
About This Manual
This document is intended to introduce the TRF4900 evaluation module
(EVM) and familiarize the reader with setting up and testing the TRF4900 EVM
using the evaluation software in a typical laboratory environment.
How to Use This Manual
Information About Cautions and Warnings
Preface
This document contains the following chapters:
- Chapter 1 − Overview
- Chapter 2 − Evaluation Board
- Chapter 3 − Software User’s Guide
Information About Cautions and Warnings
This book may contain cautions and warnings.
This is an example of a caution statement.
A caution statement describes a situation that could potentially
damage your software or equipment.
This is an example of a warning statement.
A warning statement describes a situation that could potentially
cause harm to you
.
The information in a caution or a warning is provided for your protection.
Please read each caution and warning carefully.
Read This First
iii
iv
Running Title—Attribute Reference
1 Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Purpose 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 EVM Setup 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Block Diagram 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Evaluation Board 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Schematics 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.1 Top Side Silkscreen and Drawing 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.2 Bottom Side Silkscreen and Drawing 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Parts List 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 EVM DC Voltage Setup 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Serial Interface and PC Port Pin Out 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 Standard PC Parallel Port 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6 Jumper Connections 2-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.1 Jumper Description 2-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7 Connectors and Test Points 2-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.1 Connectors 2-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.2 Test Points (TP) 2-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.3 Adjustments 2-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.4 LED Indicators 2-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Software User’s Guide 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Introduction 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Main Program Screen 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.1 Synthesizer 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.2 Mode Options 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.3 Output Parameters 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.4 PLL and MM Options 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5 Help 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.6 Words 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.7 Operation Mode 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.8 Changing Values on the Main Program Screen 3-5. . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Chip Layout Screen 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 PLL/Modulation Options Screen 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 Testing of Transmitter 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter Title—Attribute Reference
v
Running Title—Attribute Reference
1−1 TRF4900 Block Diagram 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−1 TRF4900 EVM DC Voltage Setup 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−2 TRF4900 EVM Serial Interface 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−1 Main Program Screen 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−2 Chip Layout Screen 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−3 PLL/Modulation Options Screen 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−4 Block Diagram for Testing of the TRF4900 EVM Transmitter Section 3-9. . . . . . . . . . . . . . . . .
3−5 Main Program Screen 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−6 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 Chip Layout View for FSK Modulation Output Test 3-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−11 PLL/Modulation Options Screen 3-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−12 FSK Output From Transmitter 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−13 Block Diagram for Testing of the TRF4900 EVM Transmitter Section With an
3−14 FSK Output From Transmitter With an External Modulation 3-17. . . . . . . . . . . . . . . . . . . . . . . .
External Pulse Generator 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
vi
Chapter 1
This chapter provides an overview of the TRF4900 evaluation module (EVM).
Topic Page
1.1 Purpose 1−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 EVM Setup 1−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Block Diagram 1−3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview
1-1
Purpose
1.1 Purpose
1.2 EVM Setup
The TRF4900 evaluation module (EVM) provides a platform for lab prototype
evaluation of the Texas Instruments TRF4900.
The TRF4900 EVM board evaluates the RF performance of the TRF4900. It
contains a PC parallel port interface and operates from 850 MHz to 950 MHz
from 2.2 V to 3.6 V. The TRF4900 EVM contains two SMA connectors that
allow the user to observe transmitted data, to test the VCO tuning range, or
to feed in an external RF input. The transmitted data can be viewed on a
spectrum analyzer as either a single output frequency or in FSK mode at data
rates up to 30 kbps. Although higher data rates are achievable with the
TRF4900, the TRF4900 EVM is designed to operate at data rates up to 30
kbps at room temperature.
The 3.5-inch diskette supplied with the TRF4900 contains the software
required to demonstrate the TRF4900. Complete the following steps to set up
the TRF4900 for evaluation.
Step 1: Place the 3.5-inch diskette into the floppy disk drive of the computer
being used to evaluate the TRF4900.
Step 2: Copy the TRF4900.exe file to the hard drive.
Step 3: Connect a DB25 female to a DB25 male cable between the TRF4900
evaluation board and the PC parallel port. The DB25 female end of
the cable is connected to the TRF4900. The DB25 male end of the
cable is connected to the 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 TRF4900 evaluation board.
Step 5: Verify that the power supply output is set to 8 V.
Step 6: Turn the power supply on.
Step 7: If the jumper at JP4 is installed, verify that LED3 (the red power on
LED) is illuminated.
Step 8: Run the TRF4900.exe file on the PC.
Step 9: Press the Send Words Now (F12) button located on the main
program screen.
Step 10: Verify that LED1 (the green lock detect LED) is illuminated. When the
lock detect LED is illuminated, the PLL is locked on frequency.
Note:
The actual icons/windows on the computer screen may differ from those
shown in the user’s guide, due to software version upgrades.
The schematics shown in this user’s guide may not match the current
revision, due to PCB and component upgrades.
Always check the TI website for the latest schematics and software.
1-2
1.3 Block Diagram
Figure 1−1 shows the block diagram for the TRF4900.
Figure 1−1.TRF4900 Block Diagram
Block Diagram
PD_OUT1
PLL_VCC
PD_SET
VCO_TANK1
VCO_TANK2
PLL_GND
DIG_GND
CLOCK
DATA
STROBE
MODE
STDBY
1
2
3
PLL
24
PD_OUT2
23
LOCKDET
22
PA_OUT
Power
4
VCO
5
6
7
8
9
Serial
Interface
10
11
12
TRF4900
Direct Digital Synthesizer
Power-Down Logic
Amplifier
and
21
PA_GND
20
PA_VCC
19
GND
18
DIG_GND
17
XOSC2
16
XOSC1
15
DIG_GND
14
TX_DATA
13
NC
Overview
1-3
1-4
Chapter 2
This chapter describes the EVM and its operation.
Topic Page
2.1 Schematics 2−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Parts List 2−6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 EVM DC Voltage Setup 2−10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Serial Interface and PC Port Pin Out 2−11. . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 Standard PC Parallel Port 2−12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6 Jumper Connections 2−13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7 Connectors and Test Points 2−14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evaluation Board
2-1
Schematics
2.1 Schematics
J1
TX_OUTTX_OUT
C4
3.3pF
LDET
LOCKDET
20
21
22
23
24
PA_VCC
PA_O UT
PA_G ND
PD_OUT2
LOCKDET
IC1
PD_SET2PLL_VCC
PD_OUT14VCO_TANK15VCO_TANK26PLL_GND7DIG_GND8CLOCK
3
1
R3
19
6.8nHL1LQW1608
51
18
GND
VCC1
C5
16
DIG_VCC
DATA
9
VCC1
C7
0.1uF
15
XOSC117XOSC2
DIG_GND
STROBE11MODE12STDBY
10
0.1uF
13NC14
TRF4900
TXDATA
R4
100
STDBY
MODE
FUNDAMENTAL MODE
CQ1
DATA
STROBE
INITIAL TOLERANCE +/− 7 PPM
CLOCK
STAB OVER TEMP +/− 20 PPM
C10
TEMP RANGE −40TO +85 DEG C
25.6MHz
1000pF
DNP
SELECT FOR OUTPUT
FREQUENCY AT J1
1.5 − 10pF
C13
DNP
SAT
10pF
C12
R7
1.0M
10pF
C11
2-2
NOTES:
DNP: DO NOT PLACE
TBD: TO BE DETERMINED
123
0.1uF
C3
R2
SELECT L2 FOR CENTER FREQUENCY.
SELECT C8, C9 FOR TUNING RANGE.
TYPICAL TUNING RANGE (Vcc=3.3V)
Vt: 0.5 TO 3.0V f: 845−965MHz
SAT: SELECT AT TEST
VCC1
470pF
C2
R1
6.2k
4700pF
C1
100k
R38
100k
C6
DNP
L2
10nH
LQW1608
0
JP1
4.7pF
C9
R5
4.7pF
C8
TP1
TBDR8DNP
R10
SMV1247−079
V2
1
2
10k
1
2
V1
R6
10k
SMV1247−079
TBD
DNP
R9
DNP
TBD
R11
TBD
DNP
VCO_TANK
J2
VCO_TANK
Schematics
MODE
STDBY
CLOCK
DATA
100
R12
DATA
CLOCK
STROBE
10k
R17
10k
R16
10k
R15
LED1
LDET
LN1371SG−(TR)
100
100
R14
R13
STROBE
510
R18
TXDATA
10k
R30
10k
R29
10k
R28
VCC2
100
R27
JP3
2
3 1
MODESTDBYTXDATA
VCC2
100
R26
JP2
2
3 1
LL4148
CR4
VCC1
LN1271R−(TR)
VCC
LED3
220
JP4
0
2.0 − 3.8V (3.0V TYP)
R33
3.3V
VCC2
VCC2
0.1uF
C14
LOCKDET
CR2
LL4148
2Y252Y332Y4
2A2152A3172A4
CR3
LL4148
LL4148
LED2
ENABLE
R25
510
10
SN74LVT244BDW
10k
R24
10k
R23
10k
R22
10k
R21
10k
R20
10k
R19
LN1471SY−(TR)
POWER
13251224112310229218207196185
DB25M
VR1
RED
+8.0V
2
VOUT
VIN
LM317MDT
3
CR5
C19
0.01uF
C18
0.1uF
1.0uF
C17
360
R31
500
1
ADJ
C16
0.1uF
10uF
C15
S1JB
ZR1
SMBJ8.5CA
R32
1
2
220
R34
3
VR2
NC
1VI3VO2VO4
5NC6VO7VO8
ADJ
C22
0.01uF
C21
0.1uF
C20
220
R35
1.0uF
LM317LBD
GROUND CLIPS
R36
360
TP4
TP2 TP3
CR1
9
12
18
20
1Y1161Y2141Y3
IC2
1OE
1A141A261A381A4
1
2
1
P1
7
2Y1
1Y4
2OE112A1
19
13
17416315214
Evaluation Board
2-3
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