It is essential to measure the common mode quantities in order to take suitable countermeasures. This whitepaper discusses a simple, reliable and accurate way to do so and the effectiveness of ...

It’s suitable for both high- and low-side current sensing, with a wide common-mode voltage range from −4 to 100 V, making it a fit for increasingly popular 48-V systems and higher voltages.

This unique test circuit uses two identical copies of the op amp under test to measure the open-loop differential gain and open-loop common-mode gain separately.