The OPA4171AIDR is a quad low-noise general purpose Operational Amplifier with rail-to-rail output. It features offer low offset, drift and bandwidth with low quiescent current. The quad version has identical specifications for maximum design flexibility. Unlike most operational amplifier, which is specified at only one supply voltage, the OPAx171 family is specified from 2.7 to 36V. Input signals beyond the supply rails do not cause phase reversal. The OPAx171 family is stable with capacitive loads up to 300pF. The input can operate 100mV below the negative rail and within 2V of the top rail during normal operation. This device can operate with full rail-to-rail input 100mV beyond the top rail, but with reduced performance within 2V of the top rail.