Precision Micropower, Low Noise CMOS,
Rail-to-Rail Input/Output Operational Amplifiers
AD8603/AD8607/AD8609
FEATURES
PIN CONFIGURATIONS
Low offset voltage: 50 μV maximum
Low input bias current: 1 pA maximum
Single-supply operation: 1.8 V to 5 V
Low noise: 22 nV/√Hz
OUT
V–
1
5
V+
AD8603
TOP VIEW
2
(Not to Scale)
+IN
3
4
–IN
Micropower: 50 μA maximum
Low distortion
Figure 1. 5-Lead TSOT (UJ Suffix)
No phase reversal
Unity gain stable
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
AD8607
OUT B
–IN B
+IN B
TOP VIEW
(Not to Scale)
APPLICATIONS
Battery-powered instrumentation
Multipole filters
Figure 2. 8-Lead MSOP (RM Suffix)
Sensors
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
Low power ASIC input or output amplifiers
AD8607
OUT B
–IN B
+IN B
TOP VIEW
(Not to Scale)
GENERAL DESCRIPTION
Figure 3. 8-Lead SOIC (R Suffix)
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.
1
2
3
4
5
6
7
OUT A
–IN A
+IN A
V+
14
13
12
11
OUT D
–IN D
+IN D
V–
AD8609
TOP VIEW
(Not to Scale)
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 ±±.5 V dual supply. The combination of low offsets, low
noise, very low input bias currents, and low power consumption
makes the AD8603/AD8607/AD8609 especially useful in portable
and loop-powered instrumentation.
+IN B
–IN B
OUT B
10 +IN C
9
8
–IN C
OUT C
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
+IN A
V+
1
2
3
4
5
6
7
14 OUT D
13 –IN D
12 +IN D
11 V–
AD8609
TOP VIEW
(Not to Scale)
+IN B
–IN B
OUT B
10 +IN C
The AD8603 is available in a tiny 5-lead TSOT 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.
9
8
–IN C
OUT C
Figure 5. 14-Lead SOIC (R Suffix)
Rev. C
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