Precision Low Noise CMOS Rail-to-Rail
Input/Output Operational Amplifiers
AD8605/AD8606/AD8608*
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
Low Offset Voltage: 65 V Max
Low Input Bias Currents: 1 pA Max
Low Noise: 8 nV/√Hz
Wide Bandwidth: 10 MHz
High Open-Loop Gain: 120 dB
Unity Gain Stable
5-Lead SOT-23
(RT Suffix)
14-Lead TSSOP
(RU Suffix)
OUT A
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
1
7
14
OUT
V–
V+
1
2
5
4
–IN A
+IN A
V+
+IN B
–IN B
AD8608
AD8605
Single-Supply Operation: 2.7 V to 5.5 V
–IN
+IN
3
MicroCSPTM
8
OUT B
APPLICATIONS
Photodiode Amplification
Battery-Powered Instrumentation
Multipole Filters
Sensors
Barcode Scanners
Audio
14-Lead SOIC
(R Suffix)
8-Lead MSOP
(RM Suffix)
1
8
OUT A
V+
1
2
3
4
5
6
7
14
OUT D
OUT A
–IN A
+IN A
V+
–IN A
+IN A
V–
OUT B
–IN B
AD8606
13 –IN D
12 +IN D
+IN B
4
5
AD8608
11
10
9
V–
GENERAL DESCRIPTION
+IN B
–IN B
OUT B
+IN C
–IN C
OUT C
The AD8605, AD8606, and AD8608 are single, dual, and quad
rail-to-rail input and output, single-supply amplifiers that 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.
8-Lead SOIC
(R Suffix)
8
OUT A
–IN A
V+
1
2
3
4
8
7
6
5
OUT B
–IN B
+IN B
AD8608
+IN A
V–
5-Bump MicroCSP
(CB Suffix)
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.
TOP VIEW
(BUMPSIDE DOWN)
OUT
1
V+
5
V–
2
+IN
3
؊IN
4
AD8605 ONLY
The AD8605, AD8606, and AD8608 are specified over the
extended industrial (–40°C to +125°C) temperature range. 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.
*Protected by U.S.Patent No. 5,969,657; other patents pending.
REV. C
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