View max4172 datasheet:

19-1184; Rev 0; 12/96 Low-Cost, Precision, High-Side Current-Sense Amplifier _______________General Description ____________________________Features The MAX4172 is a low-cost, precision, high-side current- ¦ Low-Cost, High-Side Current-Sense Amplifier sense amplifier for portable PCs, telephones, and other ¦ ±0.5% Typical Full-Scale Accuracy Over systems where battery/DC power-line monitoring is criti- Temperature cal. High-side power-line monitoring is especially useful in battery-powered systems, since it does not interfere with ¦ 3V to 32V Supply Operation the battery charger’s ground path. Wide bandwidth ¦ 0V to 32V Input Range—Independent of and ground-sensing capability make the MAX4172 suitable for closed-loop battery-charger and general- Supply Voltage purpose c