Low Cost, Low Noise, CMOS,
RRO Operational Amplifiers
AD8691/AD8692/AD8694
FEATURES
PIN CONFIGURATIONS
Offset voltage: 400 μV typical
Low offset voltage drift: 6 μV/°C maximum
(AD8692/AD8694)
Very low input bias currents: 1 pA maximum
Low noise: 8 nV/√Hz
OUT
V–
1
2
3
5
V+
AD8691
TOP VIEW
(Not to Scale)
+IN
4
–IN
Figure 1. 5-Lead TSOT
Low distortion: 0.0006%
Wide bandwidth: 10 MHz
Unity-gain stable
Single-supply operation: 2.7 V to 6 V
Qualified for automotive applications
AD8691
OUT A
V–
1
2
3
5
V+
+IN A
4
–IN
APPLICATIONS
Figure 2. 5-Lead SC70
Photodiode amplification
Battery-powered instrumentation
Medical instruments
Multipole filters
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
AD8692
OUT B
–IN B
+IN B
TOP VIEW
(Not to Scale)
Sensors
Portable audio devices
Figure 3. 8-Lead MSOP
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
GENERAL DESCRIPTION
AD8692
OUT B
–IN B
+IN B
The AD8691, AD8692, and AD8694 are low cost, single, dual,
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.
TOP VIEW
(Not to Scale)
Figure 4. 8-Lead SOIC
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–
AD8694
TOP VIEW
(Not to Scale)
+IN B
–IN B
OUT B
10 +IN C
9
8
–IN C
OUT C
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.
Figure 5. 14-Lead SOIC
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–
AD8694
The small SC70 and TSOT package options for the AD8691
allow it to be placed next to sensors, thereby reducing external
noise pickup.
TOP VIEW
(Not to Scale)
+IN B
–IN B
OUT B
10 +IN C
9
8
–IN C
OUT C
The AD8691, AD8692, and AD8694 are specified over the
extended industrial temperature range of −40°C to +125°C.
The AD8691 single is available in 5-lead SC70 and 5-lead TSOT
packages. The AD8692 dual is available in 8-lead MSOP and
narrow SOIC surface-mount packages. The AD8694 quad is
available in 14-lead TSSOP and narrow 14-lead SOIC packages.
Figure 6. 14-Lead TSSOP
See the Ordering Guide section for automotive grades.
Rev. E
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2004–2011 Analog Devices, Inc. All rights reserved.