Single and Dual, Ultralow

Distortion, Ultralow Noise Op Amps

Data Sheet

AD8597/AD8599

Rev. E

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FEATURES

Low noise: 1.1 nV/√Hz at 1 kHz

Low distortion: −120 dB THD at 1 kHz

Input noise, 0.1 Hz to 10 Hz: <76 nV p-p

Slew rate: 14 V/μs

Wide bandwidth: 10 MHz

Supply current: 4.8 mA/amp typical

Low offset voltage: 10 μV typical

CMRR: 120 dB

Unity-gain stable

±15 V operation

APPLICATIONS

Professional audio preamplifiers

ATE/precision testers

Imaging systems

Medical/physiological measurements

Precision detectors/instruments

Precision data conversion

PIN CONFIGURATIONS

NC

1

–IN

2

+IN

3

V–

4

NC

8

V+

7

OUT

6

NC

5

NC = NO CONNECT

AD8597

TOP VIEW

(Not to Scale)

Figure 1. AD8597 8-Lead SOIC (R-8)

PIN 1

INDICATOR

1

2

3

4

NC

–IN

+IN

V–

7V+

8NC

6OUT

5NC

TOP VIEW

AD8597

NOTES

1. NC = NO CONNECT.

2. IT IS RECOMMENDED THAT THE

EXPOSED PAD BE CONNECTED

TO V–.

Figure 2. AD8597 8-Lead LFCSP (CP-8-2)

–V

4

+V

8

OUT B

7

–IN B

6

+IN B

5

AD8599

TOP VIEW

(Not to Scale)

Figure 3. AD8599 8-Lead SOIC (R-8)

GENERAL DESCRIPTION

The AD8597/AD8599 are very low noise, low distortion opera-

tional amplifiers ideal for use as preamplifiers. The low noise of

1.1 nV/√Hz and low harmonic distortion of −120 dB (or better)

at audio bandwidths give the AD8597/AD8599 the wide dynamic

range necessary for preamplifiers in audio, medical, and instru-

mentation applications. The excellent slew rate of 14 V/μs and

10 MHz gain bandwidth make them highly suitable for medical

applications. The low distortion and fast settling time make

them ideal for buffering of high resolution data converters.

The AD8597 is available in 8-lead SOIC and LFCSP packages,

while the AD8599 is available in an 8-lead SOIC package. They

are both specified over a −40°C to +125°C temperature range.

The AD8597 and AD8599 are members of a growing series of

low noise op amps offered by Analog Devices, Inc. (see Table 1).

Table 1. Low Noise Op Amps

Package

0.9 nV

1.1 nV

1.8 nV

2.8 nV

3.8 nV

Single

AD797

AD8597

ADA4004-1

AD8675

AD8671

Dual

AD8599

ADA4004-2

AD8676

AD8672

Quad

ADA4004-4

AD8674