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Analog Devices Semiconductor Electronic Components Datasheet

AD8656 Datasheet

(AD8655 / AD8656) Precision CMOS Amplifier

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Data Sheet
FEATURES
Low noise: 2.7 nV/Hz at f = 10 kHz
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
2.7 V to 5.5 V operation
−40°C to +125°C operation
Qualified for automotive applications
APPLICATIONS
ADC and DAC buffers
Audio
Industrial controls
Precision filters
Digital scales
Automotive collision avoidance
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 AD8655/AD8656 provide low noise (2.7 nV/√Hz at 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.
Low Noise,
Precision CMOS Amplifier
AD8655/AD8656
PIN CONFIGURATIONS
NC 1
–IN 2
+IN 3
V– 4
AD8655
TOP VIEW
(Not to Scale)
8 NC
7 V+
6 OUT
5 NC
NC = NO CONNECT
Figure 1. AD8655
8-Lead MSOP (RM-8)
8-Lead SOIC (R-8)
OUT A 1
–IN A 2
+IN A 3
V– 4
AD8656
TOP VIEW
(Not to Scale)
8 V+
7 OUT B
6 –IN B
5 +IN B
Figure 2. AD8656
8-Lead MSOP (RM-8)
8-Lead SOIC (R-8)
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 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. The AD8655/
AD8656 are both available for automotive applications.
Rev. E
Document Feedback
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.
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2005–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

AD8656 Datasheet

(AD8655 / AD8656) Precision CMOS Amplifier

No Preview Available !

AD8655/AD8656
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Pin Configurations ........................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
Typical Performance Characteristics ............................................. 6
Theory of Operation ...................................................................... 15
Applications Information .............................................................. 16
REVISION HISTORY
10/13—Rev. D to Rev. E
Changes to Figure 1 Caption and Figure 2 Caption .................... 1
Deleted Figure 3 and Figure 4; Renumbered Sequentially ......... 1
Change to General Description Section ........................................ 1
Change to Figure 4 ........................................................................... 6
Change to Figure 32 ....................................................................... 10
Changes to Ordering Guide .......................................................... 19
Changes to Automotive Products Section................................... 19
6/13—Rev. C to Rev. D
Change to Figure 57 ....................................................................... 16
5/13—Rev. B to Rev. C
Change to Figure 57 ....................................................................... 16
9/11—Rev. A to Rev. B
Changes to Features Section............................................................ 1
Updated Outline Dimensions ....................................................... 19
Changes to Ordering Guide .......................................................... 19
Added Automotive Products Section .......................................... 19
Data Sheet
Input Overvoltage Protection ................................................... 16
Input Capacitance ...................................................................... 16
Driving Capacitive Loads.......................................................... 16
Layout, Grounding, and Bypassing Considerations .................. 18
Power Supply Bypassing ............................................................ 18
Grounding ................................................................................... 18
Leakage Currents........................................................................ 18
Outline Dimensions ....................................................................... 19
Ordering Guide............................................................................... 19
Automotive Products ................................................................. 19
6/05—Rev. 0 to Rev. A
Added AD8656 ...................................................................Universal
Added Figure 2 and Figure 4 ...........................................................1
Changes to Specifications.................................................................3
Changed Caption of Figure 12 and Added Figure 13...................7
Replaced Figure 16 ............................................................................7
Changed Caption of Figure 37 and Added Figure 38................ 11
Replaced Figure 47 ......................................................................... 13
Added Figure 55 ............................................................................. 14
Changes to Ordering Guide .......................................................... 18
4/05—Revision 0: Initial Version
Rev. E | Page 2 of 20


Part Number AD8656
Description (AD8655 / AD8656) Precision CMOS Amplifier
Maker Analog Devices
Total Page 20 Pages
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