Low Power, Precision, Auto-Zero Op Amps
AD8538/AD8539
PIN CONFIGURATIONS
FEATURES
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
TOP VIEW
(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)
APPLICATIONS
NC
−IN
+IN
V−
1
2
3
4
8
7
6
5
NC
V+
Mobile communications
Portable instrumentation
Battery-powered devices
Sensor interfaces
AD8538
OUT
NC
TOP VIEW
(Not to Scale)
NC = NO CONNECT
Temperature measurement
Electronic scales
Figure 2. 8-Lead SOIC_N (R-8)
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
GENERAL DESCRIPTION
AD8539
OUT B
–IN B
+IN B
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 maximujm
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).
TOP VIEW
(Not to Scale)
Figure 3. 8-Lead SOIC_N (R-8)
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
The AD8538/AD8539 operate at very low power making these
amplifiers ideal for battery-powered devices and portable
equipment.
AD8539
OUT B
–IN B
+IN B
TOP VIEW
(Not to Scale)
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.
Figure 4. 8-Lead MSOP (RM-8)
Rev. A
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