Datasheet > TMS3705

TMS3705

更新时间： 2024-09-15 08:41:23

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TRANSPONDER BASE STATION IC

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TMS3705 数据手册

TMS3705

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11-07-22-003 – SCBS881B –JANUARY 2010–REVISED APRIL 2010

TRANSPONDER BASE STATION IC

Check for Samples: TMS3705

FEATURES

•

Base Station IC for TI-RFid™ RF Identification

Systems

•

Short-Circuit Protection

Diagnosis

•

Drives Antenna

Sleep-Mode Supply Current: 0.2 mA

Designed for Automotive Requirements

16-Pin SOIC (D) Package

Sends Modulated Data to Antenna

Detects and Demodulates Transponder

Response (FSK)

DESCRIPTION

The transponder base station IC is used to drive the antenna of a TI-RFid™ transponder system, to send data

modulated on the antenna signal, and to detect and demodulate the response of the transponder. The response

of the transponder is a FSK signal (frequency shift keyed). The high or low bits are coded in two different

high-frequency signals (134.2 kHz for low bits and 123 kHz for high bits, nominal). The transponder induces

these signals in the antenna coil according an internally stored code. The energy the transponder needs to send

out the data is stored in a charge capacitor in the transponder. The antenna field charges this capacitor in a

preceding charge phase. The IC has an interface to an external microcontroller.

There are two configurations for the clock supply to both the microcontroller and the base station IC:

1. Microcontroller and base station IC are supplied with a clock signal derived from only one resonator: The

resonator is attached to the microcontroller. The base station IC is supplied with a clock signal driven by the

digital clock output of the microcontroller. The clock frequency is either 4 MHz or 2 MHz depending on the

selected microcontroller type.

2. Both the microcontroller and the base station have their own resonator.

The base station IC has a PLL on-chip that generates a clock frequency of 16 MHz for internal clock supply only.

The TMS3705BDRG4 is optimized for higher communication data rates and therefore works without frequency

measurement during the write phase.

ORDERING INFORMATION⁽¹⁾

T_A

PACKAGE⁽²⁾

ORDERABLE PART NUMBER

TOP-SIDE MARKING

TMS3705AG4

TMS3705BG4

TMS3705A1DRG4

–40°C to 85°C

SOIC – D

Reel of 2500

TMS3705BDRG4

(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

web site at www.ti.com.

(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

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与TMS3705相关器件

型号	品牌	获取价格	描述	数据表
TMS3705A	TI	获取价格	RADIO FREQUENCY I DENTIFICATION SYSTEMS
TMS3705A1DRG4	PERICOM	获取价格	LF BASE STATION IC
TMS3705A1DRG4	TI	获取价格	TRANSPONDER BASE STATION IC
TMS3705ADR	TI	获取价格	LF Base Station IC
TMS3705BDRG4	TI	获取价格	TRANSPONDER BASE STATION IC
TMS3705DDRG4	TI	获取价格	Telecom Circuit
TMS3705DDRQ1	TI	获取价格	LF 阅读器 IC \| D \| 16 \| -40 to 85
TMS3705EDRQ1	TI	获取价格	LF 阅读器 IC \| D \| 16 \| -40 to 85
TMS370C002A	TI	获取价格	8-BIT MICROCONTROLLER
TMS370C002AFNA	TI	获取价格	8-BIT MICROCONTROLLER

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