Datasheet > TMS3705DDRG4

TMS3705DDRG4

更新时间： 2024-09-15 19:42:11

品牌	Logo	应用领域
德州仪器 - TI		电信电信集成电路
页数	文件大小	规格书
30页	955K
描述
Telecom Circuit

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TMS3705DDRG4 技术参数

生命周期：	Obsolete	包装说明：	,
Reach Compliance Code：	compliant	HTS代码：	8542.39.00.01
风险等级：	5.66	电信集成电路类型：	TELECOM CIRCUIT
Base Number Matches：	1

TMS3705DDRG4 数据手册

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TMS3705

SCBS881C –JANUARY 2010–REVISED APRIL 2016

TMS3705 Transponder Base Station IC

1 Device Overview

1.1 Features

• Base Station IC for TI-RFid™ RF Identification

Systems

• Short-Circuit Protection

• Diagnosis

• Drives Antenna

• Sends Modulated Data to Antenna

• Detects and Demodulates Transponder Response

(FSK)

• Sleep-Mode Supply Current: 0.2 mA

• Designed for Automotive Requirements

• 16-Pin SOIC (D) Package

1.2 Applications

•

Car Access

•

Building Access

Livestock Reader

Immobilization

1.3 Description

The TMS3705 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 frequency shift keyed (FSK) signal. 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 that 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. The 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. The microcontroller and the base station each have their own resonator.

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

supply only. The TMS3705BDRG4 and TMS3705DDRG4 are optimized for higher communication data

rates and, therefore, work without frequency measurement during the write phase.

Device Information⁽¹⁾

PART NUMBER

TMS3705A1DRG4

PACKAGE

SOIC (16)

BODY SIZE⁽²⁾

9.9 mm × 3.91 mm

TMS3705BDRG4

TMS3705DDRG4

(1) For the most current part, package, and ordering information for all available devices, see the Package

Option Addendum in Section 8, or see the TI website at www.ti.com.

(2) The sizes shown here are approximations. For the package dimensions with tolerances, see the

Mechanical Data in Section 8.

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...30

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与TMS3705DDRG4相关器件

型号	品牌	获取价格	描述	数据表
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
TMS370C002AFNL	TI	获取价格	8-BIT MICROCONTROLLER
TMS370C002AFNT	TI	获取价格	8-BIT MICROCONTROLLER
TMS370C002AYYZ	TI	获取价格	TMS370 MICROCONTROLLER FAMILY DATA BOOK
TMS370C010A	TI	获取价格	8-BIT MICROCONTROLLER
TMS370C010AFNA	TI	获取价格	8-BIT MICROCONTROLLER
TMS370C010AFNL	TI	获取价格	8-BIT MICROCONTROLLER

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