Exploring current sense amplifiers

CHAPTER 1

Getting started with current sensing

This video introduces current sensing based on a shunt solution and provides a first approach to understanding how it works and how it can be used.

CHAPTER 2

Current sensing configuration

This video introduces the key concepts behind high‑side and low‑side current sensing, as well as bidirectional and unidirectional configurations.

CHAPTER 3

Key parameters for choosing a current sensing device

This video introduces the first steps to help you choose the right current‑sensing solution for your application.

CHAPTER 4

Accuracy of current sensing

This video introduces the different error categories of a current sensing amplifier, that can impact measurement accuracy.

CHAPTER 5

Input offset voltage (V_io) and drift over temperature (∆𝑉_io/∆𝑇)

This video introduces the first source of error acting as an offset, whose contribution is generally dominant when small currents must be measured. It focuses on the input voltage offset and its variation with temperature.

CHAPTER 6

Common-mode rejection ratio (CMRR)

This video introduces the first source of error acting as an offset, whose contribution is generally dominant when small currents must be measured. It focuses on the input voltage offset and its variation with temperature.

CHAPTER 7

Power-supply rejection ratio (SVR)

This video introduces the power supply rejection ratio, also called the SVR parameter, and its impact on measurement accuracy.

CHAPTER 8

Error source acting as a percentage

This video introduces the second error source, which acts as a percentage and is generally dominant when high current is measured. It presents errors related to the integrated gain and its linearity.

CHAPTER 9

Application-dependent error sources

This video introduces the third error source, which is linked to the application. It presents the input bias current and the shunt resistance.

CHAPTER 10

Error calculation methodology

This video introduces different calculation methods that take into account all parameters likely to degrade current measurement and estimate the total error.