R
ADIO
F
REQUENCY
I
DENTIFICATION
S
YSTEMS
LF Base Station IC TMS3705A
The LF base station IC TMS3705A allows an efficient development and
production of handheld RFID readers & vehicle immobilizers. This base
station IC drives the antenna of a TI-RFid transponder system to send
data modulated on the antenna signal, and to detect and demodulate
the response from the transponder. It allows also minimizing the
external component count.
The key functions of the base station IC TMS3705A are:
祿 Self-adapting to transponders with a resonance frequency
between 129 kHz 鈥?140 kHz
祿 Supports all TI-RFid LF transponder functions
祿 Asynchronous and synchronous data transmission to the IC
祿 Power management for 5V operation
祿 Internal full bridge antenna driver
祿 PLL for internal clock generation of 16 MHz
祿 Overcurrent protection of antenna driver
Specifications:
Part Number
Operating Frequency
Operating Voltage
Current Consumption
Interface to Micro Controller
Antenna Inductivity
ESD Protection (MILSTD 883)
Operating Temperature
Storage Temperature
Package / Pin count
Packing / Delivery
Typical 134.2kHz, FSK
4.5V to 5.5V DC
Charge Phase (without antenna load) typical 8 mA;
Sleep Mode (without I/O currents)
typical 15
碌A(chǔ);
Two wire multifunctional serial interface, 15625 baud
400碌H - 700碌H recommended
-2000V to +2000V
-40擄C to +85擄C
-40擄C to +100擄C (125擄C up to 1000hrs over lifetime)
SO 16 (10 mm x 6 mm)
Tape on Reel, 2500 units per reel
max. 20mA
max. 0.2mA
RI-TMS3705ADR
TIRIS READER
TIRIS TRANSPONDER
+5 V
POWER
SUPPLY
TMS37 05A
+1 2 V
GND
IC
碌C
RS232
DRIVER
RXD
TXD
GND
READER
ANTENNA
RF MODULE
CONTROL MODULE
Sample Set-up of a Transponder System
For more information, contact the sales office or distributor nearest you. This contact information can be found
on our web site at:
http://www.ti-rfid.com
Texas Instruments reserves the right to change its products and services at any time without notice. TI provides customer assistance in various
technical areas, but does not have full access to data concerning the uses and applications of customers products. Therefore, TI assumes no
responsibility for customer product design or for infringement of patents and/or the rights of third parties, which may result from assistance
provided by TI.
漏 Copyright 2002 Texas Instruments Incorporated.
11-07-22-003
07/02
1
