SCBA020A October   1999  – March 2020 TMS3705

 

  1.   Integrated TIRIS™ RF Module TMS3705 Introduction to Low-Frequency Reader
    1.     Trademarks
    2. 1 Document Overview
    3. 2 Introduction
    4. 3 Key Features of the TMS3705
      1. 3.1 PLL for the System Clock
      2. 3.2 Ceramic Resonator for Reference Oscillator
      3. 3.3 Full-Bridge Driver Stage
      4. 3.4 Fully Integrated Bandpass Amplifier
      5. 3.5 Multifunctional 2-Wire Interface
    5. 4 Sequence Control
      1. 4.1 Initialization
    6. 5 Circuit Description of the Sample RF Module
      1. 5.1 Oscillator System
      2. 5.2 Antenna Circuit
      3. 5.3 Pre-Amplifier
      4. 5.4 Interface Circuit to the Control Module
      5. 5.5 Antenna Coil
    7. 6 Regulatory Notices and Ordering
      1. 6.1 Regulatory Notices
      2. 6.2 Ordering
  2.   Revision History

2 Introduction

A TIRIS application consists of one or more transponders and a reader. The reader described in this application report normally contains the reader antenna, the RF module, and the control module.

A TIRIS RF module is the interface between the TIRIS transponder and the control module (data processing unit) of a TIRIS transponder reading/writing system. It can charge a TIRIS transponder, write to and program a read/write or multipage transponder, receive the transponder response signal, and demodulate the signal for further digital data processing.

The control module in this application example operates as interface for a PC that manages the display and command input functions. In such a configuration, the control module handles most data protocol items and the detailed fast timing functions. In other applications like automotive immobilizers, the control module can be part of the engine management unit.

sample_cba020.gifFigure 1. TIRIS Sample Setup Without PC