Precision Micropower, Low Noise CMOS
Rail-to-Rail Input/Output Operational
Amplifiers
AD8603/AD8607/AD8609
FEATURES
Low offset voltage: 50 μV max
Low input bias current: 1 pA max
Single-supply operation: 1.8 V to 5 V
Low noise: 22 nV/√Hz
Micropower: 50 μA max
Low distortion
No phase reversal
Unity gain stable
PIN CONFIGURATIONS
OUT
1
V–
2
+IN
3
AD8603
TOP VIEW
(Not to Scale)
5
V+
4
–IN
Figure 1. 5-Lead TSOT-23 (UJ Suffix)
OUT A
1
–IN A
2
8
V+
OUT B
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AD8607
TOP VIEW
(Not to Scale)
7
6
5
APPLICATIONS
Battery-powered instrumentation
Multipole filters
Sensors
Low power ASIC input or output amplifiers
+IN A
3
V–
4
–IN B
+IN B
Figure 2. 8-Lead MSOP (RM Suffix)
OUT A
1
8
V+
OUT B
GENERAL DESCRIPTION
The AD8603/AD8607/AD8609 are single/dual/quad micro-
power rail-to-rail input and output amplifiers, respectively, that
feature very low offset voltage as well as low input voltage and
current noise.
These amplifiers use a patented trimming technique that
achieves superior precision without laser trimming. The parts
are fully specified to operate from 1.8 V to 5.0 V single supply
or from ±0.9 V to ±2.5 V dual supply. The combination of low
offsets, low noise, very low input bias currents, and low power
consumption make the AD8603/AD8607/AD8609 especially
useful in portable and loop-powered instrumentation.
The ability to swing rail-to-rail at both the input and output
enables designers to buffer CMOS ADCs, DACs, ASICs, and
other wide output swing devices in low power, single-supply
systems.
The AD8603 is available in a tiny 5-lead TSOT-23 package.
The AD8607 is available in 8-lead MSOP and 8-lead SOIC
packages. The AD8609 is available in 14-lead TSSOP and
14-lead SOIC packages.
–IN
A
2
+IN A
3
AD8607
7
6
–IN
B
TOP VIEW
(Not to Scale)
5
+IN B
V–
4
Figure 3. 8-Lead SOIC_N (R Suffix)
OUT A
1
–IN
A
2
14
13
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
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+IN A
3
V+
4
+IN B
5
–IN B
6
OUT B
7
AD8609
TOP VIEW
(Not to Scale)
12
11
10
9
8
Figure 4. 14-Lead TSSOP (RU Suffix)
OUT A
–IN A
1
2
14
OUT D
13
–IN D
+IN A
3
V+
4
+IN B
5
–IN B
OUT B
6
7
AD8609
12
+IN D
TOP VIEW
11
V–
(Not to Scale)
10
+IN C
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9
8
–IN C
OUT C
Figure 5. 14-Lead SOIC_N (R Suffix)
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
© 2005 Analog Devices, Inc. All rights reserved.
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