ANALOG DEVICES AD8574-EP Service Manual
Zero-Drift, Single-Supply, Rail-to-Rail I/O
AD8574-EP
OUT A
1
–IN A
2
+IN A
3
V+
4
+IN B
5
OUT D
–IN D
+IN D
V–
+IN C
14
13
12
11
10
–IN B
6
OUT B
7
–IN C
OUT C
9
8
AD8574-EP
TOP VIEW
(Not to Scale)
09302-003
FEATURES
Supports defense and aerospace applications (AQEC
standard)
Military temperature range (−55°C to +125°C)
Controlled manufacturing baseline
One assembly/test site
One fabrication site
Enhanced product change notification
Qualification data available on request
Low 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: 145 dB typical
CMRR: 140 dB typical
PSRR: 130 dB typical
Ultralow input bias current: 10 pA typical
Low supply current: 750 µA per op amp
Overload recovery time: 50 µs
No external capacitors required
APPLICATIONS
Temperature sensors
Pressure sensors
Precision current sensing
Strain gage amplifiers
GENERAL DESCRIPTION
This amplifier has ultralow offset, drift, and bias current. The
AD8574-EP is a quad amplifier, featuring rail-to-rail input and
output swings. It is guaranteed to operate from 2.7 V to 5 V
single supply.
Quad, Operational Amplifier
PIN CONFIGURATIONS
Figure 1. 14-Lead TSSOP (RU Suffix)
The AD8574-EP provides benefits previously found only in
expensive auto-zeroing or chopper-stabilized amplifiers. Using
a patented spread-spectrum, auto-zero technique, the AD8574
eliminates the intermodulation effects from interaction of the
chopping function with the signal frequency in ac applications.
With an offset voltage of only 1 µV and drift of 0.005 µV/°C, the
AD8574-EP is perfectly suited for applications where error
sources must be minimized.
The AD8574-EP is specified for the military temperature range
(−55°C to +125°C). The AD8574-EP quad amplifier is available in
a 14-lead TSSOP package.
Additional applications and technical information is available in
the AD8571/AD8572/AD8574 data sheets.
Rev. 0
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