AD8237ARMZ Description
The AD8237ARMZ is a rail-to-rail input and output instrumentation amplifier with micropower and zero drift. Any gain from 1 to 1000 is set by the relative match of two resistors. With two ratio-matched resistors, the AD8237 provides exceptional gain accuracy that can be maintained at any gain.
To provide real rail-to-rail capability, the AD8237ARMZ uses an indirect current feedback architecture. The AD8237ARMZ, unlike traditional in-amps, can fully amplify signals with common-mode voltage at or slightly over its supply. This allows high common-mode voltage applications to use a smaller power supply and conserve energy. For portable systems, the AD8237ARMZ is a suitable choice. The AD8237ARMZ makes full use of a restricted power budget, offering bandwidth and drift performance ideal for bench-top systems, with a minimum supply voltage of 1.8 V, a typical supply current of 115 A, and a wide input range.
AD8237ARMZ Features
Can achieve low gain drift at all gains
Supply current: 115 μA
Rail-to-rail input and output
Zero input crossover distortion
Minimum CMRR: 106 dB
Maximum gain error: 0.005% (all gains)
Maximum offset voltage drift: 0.3 μV/°C
Maximum gain drift: 0.5 ppm/°C (all gains)
Input bias current: 1 nA guaranteed to 125°C
AD8237ARMZ Applications
Portable systems
Bridge amplification
Current measurement
Pressure measurement
Medical instrumentation
Thermocouple interface
