Precision Micropower, Low Noise CMOS
Rail-to-Rail Input/Output Operational
Amplifiers
AD8603/AD8607/AD8609
Rev. B
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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
APPLICATIONS
Battery-powered instrumentation
Multipole filters
Sensors
Low power ASIC input or output amplifiers
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.
PIN CONFIGURATIONS
04356-001
OUT
1
V–
2
+IN
3
V+
5
–IN
4
AD8603
TOP VIEW
(Not to Scale)
Figure 1. 5-Lead TSOT-23 (UJ Suffix)
04356-002
OUT
1
–IN A
2
+IN A
3
V–
4
V+
8
OUT B
7
–IN B
6
+IN B
5
AD8607
TOP VIEW
(Not to Scale)
Figure 2. 8-Lead MSOP (RM Suffix)
04356-003
OUT A
1
–
IN A
2
+IN A
3
V
–
4
V+
8
OUT B
7
–
IN B
6
+IN B
5
AD8607
TOP VIEW
(Not to Scale)
Figure 3. 8-Lead SOIC_N (R Suffix)
04356-004
1
2
3
4
5
6
7
AD8609
–
IN A
+IN A
V+
OUT B
–IN B
+IN B
OUT A
14
13
12
11
10
9
8
–IN D
+IN D
V–
OUT C
–IN C
+IN C
OUT D
TOP VIEW
(Not to Scale)
Figure 4. 14-Lead TSSOP (RU Suffix)
OUT A
1
–IN A
2
+IN A
3
V+
4
OUT D
14
–IN D
13
+IN D
12
V–
11
+IN B
5
+IN C
10
–IN B
6
–IN C
9
OUT B
7
OUT C
8
AD8609
TOP VIEW
(Not to Scale)
04356-005
Figure 5. 14-Lead SOIC_N (R Suffix)
