The MAX9634HERS+T is a 1μA, precision current sense amplifier in 4 pin UCSP package. This high side 100V/V gain current sense amplifier offers precision accuracy specifications of VOS less than 250μV (max), gain error less than 0.5% (max) and ultra low quiescent supply current of 1μA making the part ideal for applications in notebook computers, cell phones, PDAs and all battery operated portable devices where accuracy, low quiescent current and small size are critical.