FEATURESLow offset voltage: 1 μV
Input offset drift: 0.005 μV/°C
Rail-to-rail input and output swing
5 V/2.7 V single-supply operation
High gain, CMRR, PSRR: 130 dB
Ultralow input bias current: 20 pA
Low supply current: 700 μA/op amp
Overload recovery time: 50 μs
No external capacitors required
GENERAL DESCRIPTIONThis family of amplifiers has ultralow offset, drift, and bias
current. The AD8551, AD8552, and AD8554 are single, dual,
and quad amplifiers featuring rail-to-rail input and output swings.
All are guaranteed to operate from 2.7 V to 5 V with a single
supply.
The AD8551/AD8552/AD8554 provide the benefits previously found only
in expensive auto-zeroing or chopper-stabilized
amplifiers. Using Analog Devices, Inc. topology, these new
zero-drift amplifiers combine low cost with high accuracy. No
external capacitors are required.
With an offset voltage of only 1 μV and drift of 0.005 μV/°C, the
AD8551/AD8552/AD8554 are perfectly suited for applications
in which error sources cannot be tolerated. Temperature, position
and pressure sensors, medical equipment, and strain
gage amplifiers benefit greatly from nearly zero drift over their
operating temperature range. The rail-to-rail input and output
swings provided by the AD8551/AD8552/AD8554 make both high-side and
low-side sensing easy. .