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AD8655 Datasheet(PDF) 1 Page - Analog Devices

Part No. AD8655
Description  Low Noise, Precision CMOS Amplifier
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD8655 Datasheet(HTML) 1 Page - Analog Devices

 
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Low Noise,
Precision CMOS Amplifier
AD8655/AD8656
Rev. A
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
© 2005 Analog Devices, Inc. All rights reserved.
FEATURES
PIN CONFIGURATIONS
Low noise: 2.7 nV/
√Hz @ f = 10 kHz
NC
1
–IN
2
+IN
3
V–
4
NC
8
V+
7
OUT
6
NC
5
AD8655
TOP VIEW
(Not to Scale)
NC = NO CONNECT
OUT A
1
–IN A
2
+IN A
3
V–
4
V+
8
OUT B
7
–IN B
6
+IN B
5
AD8656
TOP VIEW
(Not to Scale)
Low offset voltage: 250 μV max over VCM
Offset voltage drift: 0.4 μV/°C typ and 2.3 μV/°C max
Bandwidth: 28 MHz
Rail-to-rail input/output
Unity gain stable
Figure 1. AD8655
8-Lead MSOP (RM-8)
Figure 2. AD8656
8-Lead MSOP (RM-8)
2.7 V to 5.5 V operation
−40°C to +125°C operation
APPLICATIONS
OUT A
1
–IN A
2
+IN A
3
V–
4
V+
8
OUT B
7
–IN B
6
+IN B
5
AD8656
TOP VIEW
(Not to Scale)
NC
1
–IN
2
+IN
3
V–
4
NC
8
V+
7
OUT
6
NC
5
NC = NO CONNECT
AD8655
TOP VIEW
(Not to Scale)
ADC and DAC buffers
Audio
Industrial controls
Precision filters
Digital scales
Figure 3. AD8655
8-Lead SOIC (R-8)
Figure 4. AD8656
8-Lead SOIC (R-8)
Strain gauges
PLL filters
GENERAL DESCRIPTION
The AD8655/AD8656 are the industry’s lowest noise, precision
CMOS amplifiers. They leverage the Analog Devices DigiTrim®
technology to achieve high dc accuracy.
The high precision performance of the AD8655/AD8656
improves the resolution and dynamic range in low voltage
applications. Audio applications, such as microphone pre-amps
and audio mixing consoles, benefit from the low noise, low
distortion, and high output current capability of the AD8655/
AD8656 to reduce system level noise performance and maintain
audio fidelity. The high precision and rail-to-rail input and
output of the AD8655/AD8656 benefit data acquisition, process
controls, and PLL filter applications.
The AD8655/AD8656 provide low noise (2.7 nV/√Hz @ 10 kHz),
low THD + N (0.0007%), and high precision performance
(250 μV max over VCM) to low voltage applications. The ability
to swing rail-to-rail at the input and output enables designers
to buffer analog-to-digital converters (ADCs) and other wide
dynamic range devices in single-supply systems.
The AD8655/AD8656 are fully specified over the −40°C to
+125°C temperature range. The AD8655/AD8656 are available
in Pb-free, 8-lead MSOP and SOIC packages.


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