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TMS37122 Datasheet(PDF) 38 Page - Texas Instruments

Part # TMS37122
Description  TIRIS Automotive Devices Analog Front End IC TMS37122
PDF  73 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMS37122 Datasheet(HTML) 38 Page - Texas Instruments

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Analog Front End IC TMS37122 - Reference Guide
August ’01
Figure 23: VWAKEB SENSITIVITY Diagram
2.10.3.3 Pulse Position Demodulator Threshold
Four bits are provided defining the Pulse Position Demodulation Threshold Count (cHdet) for decoding the
PPM Wake Pattern. The resulting Threshold Time (tHdet) depends on the used system frequency:
tHdet = cHdet / fTXThe numbers in below table are given for the nominal TIRIS System Frequency
(fTX=134.2 kHz),the default cHdet is 56:
0
50
100
150
200
250
300
15
14
13
12
11
10
98765432
1
0
CONFIGURATION
SPECmin
SPECnom
SPECmax



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