INA282 current acquisition

Overview

INA282
bidirectional current detector INA282, because of its wide common-mode input and high resistance to common-mode signals, allows the ammeter to perform online measurements on a common power supply system without using an isolated power supply, which is a good solution to the problem that various function meters cannot interact with each other. The problem of independent work is suitable for intelligent instrument integrated design.
The chip voltage acquisition gain is 50V/V.
We can calculate the corresponding sampling resistor according to our own needs.
Circuit connection method:
When REF1 and REF2 are grounded at the same time, the chip output pin voltage Vout=I*R*50;
when any pin of REF1 and REF2 is grounded and one pin is connected to VCC, Vout=I*R*50+ 1/2*VCC
This circuit uses the second connection method

Design Files

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Update:2024-11-15 08:32:00

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