Instrumentation amplifier for low-frequency sensor front-ends
The AD8236ARMZ-R7 is a single-supply instrumentation amplifier from Analog Devices, built for precision signal conditioning in the DC-to-low-kHz range. Drawing only 33 µA supply current, the part suits battery-powered or loop-powered transmitter designs where every microamp matters. The rail-to-rail output stage lets it swing close to the supply rails, preserving dynamic range in low-voltage systems down to 1.8 V.
What the 1 pA input bias and 3.5 mV offset mean for your BOM
The 1 pA typical input bias current means the AD8236ARMZ-R7 loads the source negligibly — a 10 MΩ source impedance sees only 10 µV of voltage error from bias current, so no external buffer is needed. The 3.5 mV maximum input offset voltage is the dominant DC error term; for a 100 mV full-scale bridge output, that is 3.5% error before any gain-stage drift. Plan a system calibration or digital trim if your accuracy target is below 1%. The 6 mA output current capability drives typical SAR ADC inputs or a second gain stage directly, but will not drive a heavy cable or a 50 Ω back-terminated line — budget a buffer if the output must drive more than a few hundred pF of load capacitance.
Supply voltage, temperature range, and package
Housed in an 8-MSOP (0.118" body width, 3.00 mm) surface-mount package, the footprint matches the industry-standard MSOP-8. The tape-and-reel option is the standard 7-inch reel quantity for automated pick-and-place.