AD8420

Data Sheet FEATURES Maximum supply current: 90 μA Minimum CMRR: 100 dB Drives heavy capacitive loads: ~700 pF Rail-to-rail output Input voltage range goes below ground Gain set with 2 external resistors Can achieve low gain drift at any gain Very wide power supply range Single supply: 2.7 V to 36 V Dual supply: ±2.7 V to ±18 V Bandwidth (G = 100): 2.5 kHz Input voltage noise: 55 nV/√Hz High dc precision Maximum offset voltage: 125 μV Maximum offset drift: 1 μV/°C Maximum differential input voltage: ±1 V 8-lead MSOP package APPLICATIONS Bridge amplifiers Pressure measurement Medical instrumentation Portable data acquisition Multichannel systems Wide Supply Range, Micropower, Rail-to-Rail Instrumentation Amplifier AD8420 PIN CONFIGURATION AD8420 NC 1 +IN 2 –IN 3 –VS 4 +– –+ TOP VIEW (Not to Scale) 8 VOUT 7 FB 6 REF 5 +VS Figure 1. 09945-001 Table 1. Instrumentation Amplifiers by Category1 General Purpose Zero Drift Military Low Grade Power AD8221, AD8222 AD8231 AD620 AD8420 AD8220, AD8224 AD8290 AD621 AD8235 AD8236 AD8226, AD8227 AD8293G80, AD524 AD627 AD8293G160 AD8228 AD8553 AD526 AD8226 AD8227 AD8295, AD8224 AD8556 AD624 AD623 AD8557 AD8223 Digital Gain AD8250 AD8251 AD8253 AD8231 1 See www.analog.com for the latest instrumentation amplifiers. GENERAL DESCRIPTION The AD8420 is a low cost, micropower, wide supply range, instrumentation amplifier with a rail-to-rail output and a novel architecture that allows for extremely flexible design. It is opt...