TSC21x Current Sense Amplifiers STMicroelectronics TSC21x Current Sense Amplifiers are designed to sense current via a shunt resistor over a wide range of common-mode voltages, from -0.3V to +26V. This low/high side, bidirectional current sense amplifier is designed with a specific zero-drift architecture, enabling high precision. The TSC21x Current Sense Amplifiers can be used in various functions such as precision current measurement, over current protection, current monitoring, and feedback loops.