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
OUT
V–
1
2
3
5
V+
AD8603
TOP VIEW
(Not to Scale)
+IN
4
–IN
Figure 1. 5-Lead TSOT-23 (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
APPLICATIONS
Battery-powered instrumentation
(Not to Scale)
Multipole filters
Sensors
Figure 2. 8-Lead MSOP (RM Suffix)
Low power ASIC input or output amplifiers
OUT A
IN A
+IN A
1
2
3
4
8
7
6
5
V+
AD8607
–
OUT B
GENERAL DESCRIPTION
–IN B
TOP VIEW
(Not to Scale)
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.
V
–
+IN B
Figure 3. 8-Lead SOIC_N (R Suffix)
1
2
3
4
5
6
7
OUT A
IN A
14
13
12
11
OUT D
–IN D
+IN D
V–
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 make the AD8603/AD8607/AD8609 especially
useful in portable and loop-powered instrumentation.
–
+IN A
V+
AD8609
TOP VIEW
(Not to Scale)
+IN B
–IN B
OUT B
10 +IN C
9
8
–IN C
OUT C
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.
Figure 4. 14-Lead TSSOP (RU Suffix)
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
The AD8603 is available in a tiny 5-lead TSOT-±3 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.
(Not to Scale)
+IN B
–IN B
OUT B
10 +IN C
9
8
–IN C
OUT C
Figure 5. 14-Lead SOIC_N (R Suffix)
Rev. B
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