Current-sense amplifiers (also called current shunt amplifiers) are special purpose operational amplifiers (op amps) that integrate external components and output a voltage proportional to the current flowing in a power rail. They utilize a "sense resistor" to convert the load current in the power rail to a small voltage, which is then amplified by the current sense amplifier. Renesas offers unidirectional high-side and low-side current sense amplifiers.
Renesas has both analog output current sense amplifiers and digital output digital power monitors (DPMs).
|ISL28006||Micropower, Rail to Rail Input Current Sense Amplifier with Voltage Output|
|ISL28022||Precision Digital Power Monitor|