描述 Description

The EL8171 and EL8172 are micropower instrumentation amplifiers optimized for single supply operation over the +2.4V to +5.5V range. Inputs and outputs can operate rail-to-rail. As with all instrumentation amplifiers, a pair of inputs provide very high common-mode rejection and are completely independent from a pair of feedback terminals. The feedback terminals allow zero input to be translated to any output offset, including ground. A feedback divider controls the overall gain of the amplifier.
The EL8172 is compensated for a gain of 100 or more, and the EL8171 is compensated for a gain of 10 or more. The EL8171 and EL8172 have PMOS input devices that provide sub-nA input bias currents.
The amplifiers can be operated from one lithium cell or two Ni-Cd batteries. The EL8171 and EL8172 input range goes from below ground to slightly above positive rail. The output stage swings completely to ground (ground sensing) or positive supply - no pull-up or pull-down resistors are needed.

特性 Features

? 95μA maximum supply current
? Maximum input offset voltage
? 300μV (EL8172)
? 1500μV (EL8171)
? 50pA maximum input bias current
? 450kHz -3dB bandwidth (G = 10)
? 170kHz -3dB bandwidth (G = 100)
? Single supply operation
? Input voltage range is rail-to-rail
? Output swings rail-to-rail
? Ground sensing
? Pb-free (RoHS compliant)

應(yīng)用 Application

? Battery- or solar-powered systems
? Strain gauges
? Current monitors
? Thermocouple amplifiers