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 MH
Z
High open-loop gain: 1000 V/mV
Unity gain stable
Single-supply operation: 2.7 V to 5.5 V
5-ball WLCSP for single (AD8605) and 8-ball WLCSP for
dual (AD8606)
FUNCTIONAL BLOCK DIAGRAMS
BALL A1
CORNER
OUTA
A1
V+
A2
OUTB
A3
–INA
B1
–INB
B3
+INA
OUT 1
V– 2
V–
C2
+INB
02731-057
AD8605
TOP VIEW
(Not to Scale)
5 V+
C1
C3
+IN 3
4 –IN
02731-001
APPLICATIONS
Photodiode amplification
Battery-powered instrumentation
Multipole filters
Sensors
Barcode scanners
Audio
AD8606
TOP VIEW
(BALL SIDE DOWN)
Figure 1. 5-Lead SOT-23 (RJ Suffix)
TOP VIEW
(BUMP SIDE DOWN)
OUT
1
V–
2
+IN
Figure 2. 8-Ball WLCSP (CB Suffix)
OUT A
1
–IN A
2
+IN A
3
V+
4
14
OUT D
13
–IN D
V+
5
AD8608
TOP VIEW
(Not to Scale)
12
+IN D
11
V–
10
+IN C
02731-004
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 the Analog Devices,
Inc. 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 5-lead SOT-23 and 5-ball WLCSP
packages. The AD8606 dual is available in an 8-lead MSOP, an
8-ball WLSCP, and a narrow SOIC surface-mounted package.
The AD8608 quad is available in a 14-lead TSSOP package and
a narrow 14-lead SOIC package. The 5-ball and 8-ball WLCSP
offer the smallest available footprint for any surface-mounted
operational amplifier. The WLCSP, SOT-23, MSOP, and TSSOP
versions are available in tape-and-reel only.
1
–IN
02731-006
+IN B
5
–IN B
6
OUT B
7
3
4
9
–IN C
8
OUT C
AD8605 ONLY
Figure 3. 5-Ball WLCSP (CB Suffix)
Figure 4. 14-Lead SOIC_N (R Suffix)
OUT A
–IN A
+IN A
V+
+IN B
–IN B
OUT B
1
14
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
7
8
Figure 5. 8-Lead MSOP (RM Suffix),
8-Lead SOIC_N (R Suffix)
Figure 6. 14-Lead TSSOP (RU Suffix)
Protected by U.S. Patent No. 5,969,657; other patents pending.
Rev. H
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
www.analog.com
Fax: 781.461.3113 ©2002–2008 Analog Devices, Inc. All rights reserved.
02731-002
OUT A
–IN A
+IN A
V–
1
AD8606
8
TOP VIEW
(Not to Scale)
4
5
V+
OUT B
–IN B
+IN B
AD8608
TOP VIEW
(Not to Scale)
02731-003
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