The AD521 is a second generation, low cost monolithic IC instrumentation amplifier developed by Analog Devices. As a true instrumentation amplifier, the AD521 is a gain block with differential inputs and an accurately programmable input/output gain relationship. The AD521 IC instrumentation amplifier is available in four different versions of accuracy and operating temperature range. The economical "J" grade, the low drift "K" grade, and the lower drift, high linearity "L" grade are specified from 0 to +70°C. The "S" grade guarantees performance to specification over the extended temperature range: −55°C to +125°C. * Programmable gains from 0.1 to 1000 * High CMRR: 110 dB min * Low drift: 2 µV/°C max (L) * Complete input protection, Power ON and Power OFF * Functionally complete with the addition of two resistors https://elecena.pl/product/17748821/integrated-circuit-precision-instrumentation-amplifier 2021-04-17 https://elecena.pl/product/17748821/integrated-circuit-precision-instrumentation-amplifier 2025-01-17