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AMC131M03 Datasheet(PDF) 21 Page - Texas Instruments

Part # AMC131M03
Description  AMC131M03-Q1 Automotive, 3-Channel, 64-kSPS, Simultaneous-Sampling, 24-Bit, Reinforced Isolated Delta-Sigma ADC With Integrated DC/DC Converter
PDF  98 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

AMC131M03 Datasheet(HTML) 21 Page - Texas Instruments

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TX IN
Oscillator
OOK
Modulation
Transmitter
TX Signal
Conditioning
Envelope
Detection
RX Signal
Conditioning
Receiver
RX OUT
SiO2-Based
Capacitive
Reinforced
Isolation
Barrier
Figure 8-1. Block Diagram of an Isolation Channel
Figure 8-2 shows the concept of the on-off keying scheme.
TX IN
Carrier Signal Across
the Isolation Barrier
RX OUT
Figure 8-2. OOK-Based Modulation Scheme
8.3.4 Input ESD Protection Circuitry
Basic electrostatic discharge (ESD) circuitry protects the AMC131M03-Q1 inputs from ESD and overvoltage
events in conjunction with external circuits and assemblies. Figure 8-3 shows a simplified representation of the
ESD circuit. The protection for input voltages exceeding VHLDO_OUT can be modeled as a simple diode.
AINnP
AINnN
HLDO_OUT
HLDO_OUT
To analog inputs
Figure 8-3. Input ESD Protection Circuitry
The AMC131M03-Q1 has an integrated negative charge pump that allows for input voltages below HGND with a
unipolar supply. Consequently, shunt diodes between the inputs and HGND cannot be used to clamp excessive
negative input voltages. Instead, the same diode that clamps overvoltage also clamps undervoltage at the
www.ti.com
AMC131M03-Q1
SBASAO3A – MAY 2023 – REVISED SEPTEMBER 2023
Copyright © 2023 Texas Instruments Incorporated
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