Precision Low Noise CMOS Rail-to-Rail
Input/Output Operational Amplifiers
AD8605/AD8606/AD8608
FEATURES
Low offset voltage: 65 µV maximum
Low input bias currents: 1 pA maximum
Low noise: 8 nV/√Hz
Wide bandwidth: 10 MHz
High open-loop gain: 120 dB
Unity gain stable
Single-supply operation: 2.7 V to 5.5 V
MicroCSP™
APPLICATIONS
Photodiode amplification
Battery-powered instrumentation
Multipole filters
Sensors
Barcode scanners
Audio
GENERAL DESCRIPTION
The AD8605, AD8606, and AD8608
are single, dual, and quad
rail-to-rail input and output, single-supply amplifiers. They
feature very low offset voltage, low input voltage and current
noise, and wide signal bandwidth. They use Analog Devices’
patented DigiTrim® trimming technique, which achieves
superior precision without laser trimming.
The combination of low offsets, low noise, very low input bias
currents, and high speed makes these amplifiers useful in a
wide variety of applications. Filters, integrators, photodiode
amplifiers, and high impedance sensors all benefit from the
combination of performance features. Audio and other ac
applications benefit from the wide bandwidth and low
distortion. Applications for these amplifiers include optical
control loops, portable and loop-powered instrumentation,
and audio amplification for portable devices.
The AD8605, AD8606, and AD8608 are specified over the
extended industrial temperature range (−40°C to +125°C). The
AD8605 single is available in the 5-lead SOT-23 and 5-bump
MicroCSP packages. The 5-bump MicroCSP offers the smallest
available footprint for any surface-mount operational amplifier.
The AD8606 dual is available in an 8-lead MSOP package and a
narrow SOIC surface-mount package. The AD8608 quad is
available in a 14-lead TSSOP and a narrow 14-lead SOIC
package. MicroCSP, SOT, MSOP, and TSSOP versions are
available in tape and reel only.
OUT 1
V– 2
+IN 3
FUNCTIONAL BLOCK DIAGRAMS
5 V+
OUT A 1
–IN A 2
4 –IN
02731-D-001
8 V+
AD8605
AD8608
7 OUT B
5 +IN B
02731-D-005
02731-D-004
+IN A 3
V– 4
6 –IN B
Figure 1. 5-Lead SOT-23 (RT Suffix)
TOP VIEW
(BUMP SIDE DOWN)
OUT
1
V–
2
+IN
3
–IN
4
02731-D-006
Figure 2. 8-Lead SOIC (R Suffix)
OUT A
1
–IN A
2
+IN A
3
V+
4
+IN B
5
–IN B
6
OUT B
7
14
OUT D
13
–IN D
12
+IN D
V+
5
AD8608
11
V–
10
+IN C
9
–IN C
8
OUT C
AD8605 ONLY
Figure 3. 5-Bump MicroCSP
(CB Suffix)
OUT A
–IN A
+IN A
V–
1
4
8
5
V+
OUT B
–IN B
+IN B
Figure 4. 14-Lead SOIC (R Suffix)
AD8606
7
8
Figure 5. 8-Lead MSOP (RM Suffix)
Figure 6. 14-Lead TSSOP (RU Suffix)
1
Protected by U.S. Patent No. 5,969,657; other patents pending.
Rev. D
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
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
© 2004 Analog Devices, Inc. All rights reserved.
02731-D-002
OUT A
–IN A
+IN A
V+
+IN B
–IN B
OUT B
1
14
AD8608
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
02731-D-003
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