Low Power, Precision, Auto-Zero Op Amps
Data Sheet
AD8538/AD8539
FEATURES
PIN CONFIGURATIONS
Low offset voltage: 13 µV maximum
Input offset drift: 0.03 µV/°C
Single-supply operation: 2.7 V to 5.5 V
High gain, CMRR, and PSRR
OUT
V–
1
2
3
5
V+
AD8538
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(Not to Scale)
+IN
4
–IN
Low input bias current: 25 pA
Low supply current: 180 µA
Figure 1. 5-Lead TSOT-23 (UJ-5)
Qualified for automotive applications
NC
−IN
+IN
V−
1
2
3
4
8
7
6
5
NC
V+
APPLICATIONS
AD8538
OUT
NC
Mobile communications
Portable instrumentation
Battery-powered devices
Sensor interfaces
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(Not to Scale)
NC = NO CONNECT
Figure 2. 8-Lead SOIC_N (R-8)
Temperature measurement
Electronic scales
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
AD8539
OUT B
–IN B
+IN B
GENERAL DESCRIPTION
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(Not to Scale)
The AD8538/AD8539 are very high precision amplifiers featuring
extremely low offset voltage, low input bias current, and low power
consumption. The supply current is less than 215 μA maximum
per amplifier at 5.0 V. Operation is fully specified from 2.7 V to
5.0 V single supply ( 1.35 V to 2.5 V dual supply).
Figure 3. 8-Lead SOIC_N (R-8)
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
AD8539
OUT B
–IN B
+IN B
The AD8538/AD8539 operate at very low power making these
amplifiers ideal for battery-powered devices and portable
equipment.
TOP VIEW
(Not to Scale)
Figure 4. 8-Lead MSOP (RM-8)
The AD8538/AD8539 are specified over the extended industrial
temperature range (−40°C to +125°C). The AD8538 amplifier is
available in 5-lead TSOT-23, and 8-lead, narrow body SOIC
packages, and the AD8539 amplifier is available in 8-lead, narrow
body SOIC and 8-lead MSOP. See the Ordering Guide for the
automotive part.
Rev. B
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