Precision, Low Noise, CMOS, Rail-to-Rail,

Input/Output Operational Amplifiers

AD8605/AD8606/AD8608

Rev. H

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FEATURES

Low offset voltage: 65 μV maximum

Low input bias currents: 1 pA maximum

Low noise: 8 nV/√Hz

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)

APPLICATIONS

Photodiode amplification

Battery-powered instrumentation

Multipole filters

Sensors

Barcode scanners

Audio

GENERAL DESCRIPTION

The AD8605, AD8606, and AD86081 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.

FUNCTIONAL BLOCK DIAGRAMS

1

2

3

5

4 –IN

+IN

V+

OUT

AD8605

TOP VIEW

(Not to Scale)

V–

TOP VIEW

(BALL SIDE DOWN)

BALL A1

CORNER

A1

A2

A3

B1

B3

C1

C2

C3

AD8606

+INA

V–

+INB

–INA

–INB

OUTA

V+

OUTB

Figure 1. 5-Lead SOT-23 (RJ Suffix)

Figure 2. 8-Ball WLCSP (CB Suffix)

AD8605 ONLY

OUT

V+

V–

+IN

–IN

1

3

5

4

2

TOP VIEW

(BUMP SIDE DOWN)

–IN A

+IN A

V+

+IN B

–IN B

OUT B

OUT D

–IN D

+IN D

V–

+IN C

–IN C

OUT C

2

3

4

5

6

7

14

13

12

11

10

9

8

AD8608

TOP VIEW

(Not to Scale)

Figure 3. 5-Ball WLCSP (CB Suffix)

Figure 4. 14-Lead SOIC_N (R Suffix)

–IN A

+IN A

V–

OUT B

–IN B

+IN B

V+

18

OUT A

45

AD8606

TOP VIEW

(Not to Scale)

OUT A

–IN A

+IN A

V+

+IN B

–IN B

OUT B

–IN D

+IN D

V–

OUT D

–IN C

OUT C

+IN C

14

8

1

7

AD8608

TOP VIEW

(Not to Scale)

Figure 5. 8-Lead MSOP (RM Suffix),

8-Lead SOIC_N (R Suffix)

Figure 6. 14-Lead TSSOP (RU Suffix)