8 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

8.1 Application Information

The low analog input voltage range, excellent accuracy, and low temperature drift make the a high-performance

solution for industrial applications where shunt-based current sensing in the presence of high common-mode

voltage levels is required.

8.2 Typical Application

The AMC1202 is ideally suited for shunt-based current sensing applications where accurate current monitoring is

required in the presence of high common-mode voltages.

Figure 8-1 shows the AMC1202 in a typical application. The load current flowing through an external shunt

resistor RSHUNT produces a voltage drop that is sensed by the AMC1202. The AMC1202 digitizes the analog

input signal on the high-side, transfers the data across the isolation barrier to the low-side, reconstructs the

analog signal, and presents that signal as a differential voltage on the output pins.

The differential input, differential output, and the high common-mode transient immunity (CMTI) of the AMC1202

ensure reliable and accurate operation even in high-noise environments.

10

10

10 nF

VDD1

GND1

INP

INN

AMC1202

VDD2

OUTP

OUTN

GND2

RSHUNT

1 uF

100 nF

Floating Gate

Driver Supply

+ DC Link

– DC Link

1 uF

100 nF

Low-side supply

(3.3 V or 5 V)

Load

ADC

Figure 8-1. Using the AMC1202 for Current Sensing in a Typical Application

AMC1202

SBASAB8 – MAY 2021

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