
Low Cost, Low Noise, CMOS,
RRO Operational Amplifiers
Data Sheet
Rev. F
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FEATURES
Offset voltage: 400 V typical
Very low input bias currents: 1 pA maximum
Low noise: 8 nV/√Hz
Low distortion: 0.0006%
Wide bandwidth: 10 MHz
Unity-gain stable
Single-supply operation: 2.7 V to 6 V
Qualified for automotive applications
APPLICATIONS
Photodiode amplification
Battery-powered instrumentation
Medical instruments
Multipole filters
Sensors
Portable audio devices
GENERAL DESCRIPTION
and quad rail-to-rail output, single-supply amplifiers featuring
low offset and input voltages, low current noise, and wide signal
bandwidth. The combination of low offset, low noise, very low
input bias currents, and high speed make these amplifiers useful
in a wide variety of applications. Filters, integrators, photodiode
amplifiers, and high impedance sensors all benefit from this
combination of performance features. Audio and other ac
applications benefit from the wide bandwidth and low
distortion of these devices.
Applications for these amplifiers include power amplifier (PA)
controls, laser diode control loops, portable and loop-powered
instrumentation, audio amplification for portable devices, and
ASIC input and output amplifiers.
The small SC70 and TSOT package options for the
AD8691noise pickup.
extended industrial temperature range of 40°C to +125°C.
Th
e AD8691 single is available in 5-lead SC70 and 5-lead TSOT
narrow SOIC surface-mount packages. The
AD8694 quad is
available in 14-lead TSSOP and narrow 14-lead SOIC packages.
PIN CONFIGURATIONS
OUT
1
+IN
3
V–
2
V+
5
–IN
4
AD8691
TOP VIEW
(Not to Scale)
04991-
030
Figure 1. 5-Lead TSOT
OUT A 1
V–
2
+IN A
3
V+
5
–IN
4
AD8691
04991-
031
Figure 2. 5-Lead SC70
04991-
134
OUT A 1
–IN A 2
+IN A 3
V– 4
V+
8
OUT B
7
–IN B
6
+IN B
5
AD8692
TOP VIEW
(Not to Scale)
Figure 3. 8-Lead SOIC and 8-Lead MSOP
04991-
156
1
2
3
4
5
6
7
AD8694
–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 SOIC and 14-Lead TSSOP