AD8656_15 datasheet, PDF - EEWORLD Datasheet

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AD8656_15: DescriptionPrecision CMOS Amplifier; File Size400KB，20 Pages; ManufacturerADI; Websitehttps://www.analog.com

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AD8656_15 Overview

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 V

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

–IN

+IN

V–

Low Noise,

Precision CMOS Amplifier

AD8655/AD8656

PIN CONFIGURATIONS

V+

OUT

05304-048

OUT A

–IN A

+IN A

V–

V+

OUT B

05304-059

AD8655

TOP VIEW

(Not to Scale)

AD8656

TOP VIEW

(Not to Scale)

–IN B

+IN B

NC = NO CONNECT

Figure 1.

AD8655

8-Lead MSOP (RM-8)

8-Lead SOIC (R-8)

Figure 2.

AD8656

8-Lead MSOP (RM-8)

8-Lead SOIC (R-8)

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 V

) 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 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

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.

Document Feedback

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

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

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

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

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

AD8656_15 Related Products

	AD8656_15	AD8655_15
Description	Precision CMOS Amplifier	Precision CMOS Amplifier

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