Precision Micropower Low Noise CMOS Rail-
to-Rail Input/Output Operational Amplifiers
AD8603/AD8607/AD8609
FEATURES
PIN CONFIGURATIONS
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
5
V+
OUT
V–
1
2
3
AD8603
TOP VIEW
(Not to Scale)
4
–IN
+IN
Figure 1. 5-Lead TSOT-23 (UJ Suffix)
No phase reversal
Unity gain stable
1
8
5
OUT A
V+
–
IN A
OUT B
–IN B
APPLICATIONS
Battery-powered instrumentation
AD8607
4
+IN A
V–
+IN B
Multipole filters
Sensors
Figure 2. 8-Lead MSOP (RM Suffix)
Low power ASIC input or output amplifiers
OUT A
–IN A
1
2
3
4
8
7
6
5
V+
GENERAL DESCRIPTION
OUT B
–IN B
+IN B
AD8607
The AD8603/AD8607/AD8609 are, single/dual/quad micro-
power rail-to-rail input and output amplifiers, respectively, that
features very low offset voltage as well as low input voltage and
current noise.
+IN A
V–
Figure 3. 8-Lead SOIC (R Suffix)
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.
OUT A
OUT D
IN D
+IN D
1
14
–
–IN A
+IN A
V+
AD8609
V
–
+IN B
+IN C
IN C
OUT C
–
IN B
–
8
7
OUT B
Figure 4. 14-Lead TSSOP (RU Suffix)
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.
OUT A
IN A
1
2
3
4
5
6
7
14 OUT D
13 –IN D
12 +IN D
–
+IN A
V+
AD8609
11
10
9
V–
The AD8603 is available in a tiny 5-lead TSOT-23 package. The
AD8607 is available in 8-lead MSOP and SOIC packages. The
AD8609 is available in 14-lead TSSOP and SOIC packages.
+IN B
–IN B
OUT B
+IN C
–IN C
OUT C
8
Figure 5. 14-Lead SOIC (R Suffix)
Rev. A
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