Single and Dual, Ultralow
Distortion, Ultralow Noise Op Amps
AD8597/AD8599
PIN CONFIGURATIONS
FEATURES
Low noise: 1.1 nV/√Hz at 1 kHz
Low distortion: −120 dB THD @ 1 kHz
Input noise, 0.1 Hz to 10 Hz: <76 nV p-p
Slew rate: 14 V/μs
NC
–IN
+IN
V–
1
2
3
4
8
7
6
5
NC
V+
AD8597
OUT
NC
TOP VIEW
(Not to Scale)
NC = NO CONNECT
Wide bandwidth: 10 MHz
Supply current: 4.8 mA/amp typical
Low offset voltage: 10 μV typical
CMRR: 120 dB
Figure 1. AD8597 8-Lead SOIC (R-8)
Unity-gain stable
1ꢀ V operation
PIN 1
INDICATOR
NC
–IN
+IN
V–
1
2
3
4
8
7
6
5
NC
V+
AD8597
TOP VIEW
OUT
NC
APPLICATIONS
Professional audio preamplifiers
ATE/precision testers
Imaging systems
Medical/physiological measurements
Precision detectors/instruments
Precision data conversion
NOTES
1. NC = NO CONNECT.
2. PIN 4 AND THE EXPOSED PAD MUST BE
CONNECTED TO V–.
Figure 2. AD8597 8-Lead LFCSP (CP-8-2)
OUT A
–IN A
+IN A
–V
1
2
3
4
8
7
6
5
+V
AD8599
OUT B
–IN B
+IN B
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
Voltage Noise
0.9 nV
1.1 nV
1.8 nV
2.8 nV
3.2 nV
3.8 nV
Single
Dual
AD797
AD8597
AD8599
AD8675
AD8676
OP27
AD8671
AD8672
AD8674
Quad
ADA4004-4
Rev. B
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