Influencing factors of current detection accuracy

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

Kaixin micro test

GW MB10F 0.8A 1000V rectifier bridge

Test - lowercase jpg

Overview:
In the field of current sensing, you have a solid grasp of the basics of current sensing, understand some of the devices used in current sensing, know how to calculate the accuracy of a solution, and some guidelines for printed circuit board (PCB) layout and troubleshooting. it works. This article will give you a detailed description of some of the specifications that affect the accuracy of a solution, including input compensation voltage (Vos), common mode rejection ratio (CMRR), and power supply rejection ratio (PSRR).

This paper introduces the concept of current sensing accuracy, which is related to specifications such as Vos, CMRR, and PSRR. The examples in this article illustrate how to calculate the errors produced by these specifications in a specific application. In addition, we also briefly introduce other errors such as gain error, shunt tolerance, and Vos drift and variation.

Another definition of common mode voltage. (Differential mode gain, differential amplifier,):

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