AD8638 Datasheet, PDF (1/4 Pages) Analog Devices – 16V Auto-Zero, Rail-to-Rail Output, Precision Amplifiers

Preliminary Technical Data
16V Auto-Zero, Rail-to-Rail Output,
Precision Amplifiers
AD8638
FEATURES
Low Offset Voltage: 10 μV max.
Offset Drift: 0.08 μV/°C
Rail-to-Rail Output
16V Single or ±8V Dual Supply Operation
High Gain and CMRR: 140dB
High PSRR: 140 dB
Very Low Input Bias Current: 100 pA
Low Supply Current: 1.4 mA/amp
APPLICATIONS
Pressure and Position Sensors
Strain Gage Amplifiers
Medical Instrumentation
Thermocouple Amplifiers
Automotive Sensors
Precision References
Precision Current Sources
PIN CONFIGURATIONS
5- Lead SOT-23
(RJ-5 Suffix)
OUT ₁
5
V+
V-
AD8638
+IN 3
4 ^-IN
NC = NO CONNECT
8- Lead SOIC
(R-8 Suffix)
NC ₁
8 ^NC
-IN
V+
+IN
AD8638
OUT
V- ₄
5 ^NC
NC = NO CONNECT
GENERAL DESCRIPTION
The AD8638 is a wide bandwidth auto-zero amplifiers
featuring rail-to-rail output swing while operating from 5 V to
16 V single supply or +/−2.5 V to ±8V dual supplies.
Using Analog Devices’ new topology these zero-drift
amplifiers combine low cost, with high accuracy and low
noise. No external capacitors are required. In addition, the
AD8638 family greatly reduces the digital switching noise
often found in chopper-stabilized amplifiers.
With an offset voltage of 10 µV, offset drift less than 0.08
µV/°C and noise of only 1.5 µVp-p (0 Hz to 10 Hz), the
AD8638 family is perfectly suited for applications where error
sources must be minimized. Position and pressure sensors,
thermocouple and thermopile detectors, and strain gage
amplifiers benefit greatly from nearly zero drift over their
operating temperature range.
The AD8638 family is specified for the extended industrial
(-40° to +125°C) temperature range. The AD8638 is available
in SOT-23 and SOIC.
Rev. PrA
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