Precision Micropower, Low Noise CMOS,
Rail-to-Rail Input/Output Operational Amplifiers
AD8603/AD8607/AD8609
Rev. C
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FEATURES
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
Micropower: 50 μA maximum
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
makes 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 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 (UJ Suffix)
04356-002
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 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 (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)
4356-005
Figure 5. 14-Lead SOIC (R Suffix)
