Texas Instruments TRIS TMS37122 User Manual

CHAPTER 2
13
Electrical Description
Chapter 2: Electrical Description
This chapter describes the electrical circuitry of the 3D-Analog Front End (AFE) integrated
circuit TMS37122
Topic Page
2.1 General......................................................................................................15
2.2 Power Supply ...........................................................................................17
2.2.1 VBAT Supply........................................................................................17
2.2.1.1 Standard Battery Supply.............................................................17
2.2.1.2 Rechargeable Battery Supply .....................................................17
2.2.1.3 Battery Backup Supply ...............................................................18
2.2.2 VCL Supply ..........................................................................................19
2.2.2.1 Backup Mode..............................................................................19
2.2.2.2 Test Mode...................................................................................20
2.3 Power-on-reset.........................................................................................22
2.4 Limiter Circuits.........................................................................................23
2.5 Wake Detector ..........................................................................................24
2.6 End-of-burst Detector..............................................................................25
2.7 Pulse Position Demodulator ...................................................................25
2.8 Control Unit ..............................................................................................26
2.8.1 Off Mode ..............................................................................................28
2.8.2 Standby Mode ......................................................................................28
2.8.3 Init Mode ..............................................................................................28
2.8.4 Active Mode .........................................................................................28
2.8.4.1 Wake Pattern Detection..............................................................29
2.8.4.2 Transparent Mode ......................................................................30
2.9 FSK Modulator .........................................................................................31
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Texas Instruments TRIS TMS37122 Specifications

General

Brand	Texas Instruments
Model	TRIS TMS37122
Category	Computer Hardware
Language	English