AD8622 Datasheet, PDF (1/4 Pages) Analog Devices – Dual, Low Power, Low Noise, Low Bias Current Precision Rail-to-Rail Output Op Amp

Dual, Low Power, Low Noise, Low Bias Current
Precision Rail-to-Rail Output Op Amp
Preliminary Technical Data
AD8622
FEATURES
Very low offset voltage:
50 μV B-grade maximum
100 μV A-grade maximum
Low Bias Current: 200 pA
200 μA supply current
Rail-to-rail output swing
Low input offset drift: 0.8 μV/°C maximum
Low voltage noise at low power 12 nV/√Hz
Operating Temperature: −40°C to +125°C
±2.5 V to ±18 V operation
APPLICATIONS
Portable Precision instrumentation
Process Control Inputs
Laser diode control loops
Strain gage amplifiers
Medical instrumentation
Thermocouple amplifiers
GENERAL DESCRIPTION
The AD8622 is a dual low power (330 μA max over temperature and
supply), precision, rail-to-rail operational amplifiers.
The AD8622 is designed on ADI’s iPOLAR^TM process implementing bias
cancellation circuits to guarantee low bias current over temperature. ADI’s
proprietary iPolar process is an advanced bipolar technology implementing
vertical junction isolation with lateral trench isolation, allowing for low
noise performance amplifiers in smaller die size at faster speed and lower
power. These operational amplifiers offer ultralow offset, drift, and voltage
PIN CONFIGURATIONS
OUTA 1
-INA 2 AD8622
+INA 3 TOP VIEW
V- 4
8 V+
7 OUTB
6 -INB
5 +INB
Figure 1. 8-Lead SOIC or MSOP
noise combined with very low input bias currents over the full operating
temperature range. Operation is fully specified from ±5 V to ±15 V.
With typical offset voltage of only 10 μV, offset drift of 0.2 μV/°C, and noise
of only TBD μV p-p (0.1 Hz to 10 Hz), these is perfectly suited for
applications where large error sources cannot be tolerated. Many systems
can take advantage of the low bias current, low noise, dc precision, and rail-
to-rail output swing provided by the devices to maximize SNR and dynamic
range for low power operation.
Rev. PrA
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