AD8572ARUZ datasheet, PDF - EEWORLD Datasheet

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AD8572ARUZ: CategoryAnalog mixed-signal IC General operational; File Size520KB，28 Pages; ManufacturerADI; Websitehttps://www.analog.com

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User Manual

【User Guides】UG-717: Setting Up the Evaluation Boards for the ADP165/ADP166

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Data Sheet

FEATURES

Low offset voltage: 1 μV

Input offset drift: 0.005 μV/°C

Rail-to-rail input and output swing

5 V/2.7 V single-supply operation

High gain: 145 dB typical

CMRR: 140 dB typical

PSRR: 130 dB typical

Ultralow input bias current: 10 pA typical

Low supply current: 750 μA per op amp

Overload recovery time: 50 μs

No external capacitors required

Zero-Drift, Single-Supply, Rail-to-Rail

Input/Output Operational Amplifiers

AD8571/AD8572/AD8574

PIN CONFIGURATIONS

–IN A

+IN A

V–

V+

OUT A

01104-001

01104-006

AD8571

TOP VIEW

(Not to Scale)

NC = NO CONNECT

Figure 1. 8-Lead MSOP (RM Suffix)

–IN A

+IN A

V+

AD8571

NC = NO CONNECT

APPLICATIONS

Temperature sensors

Pressure sensors

Precision current sensing

Strain gage amplifiers

Medical instrumentation

Thermocouple amplifiers

Figure 2. 8-Lead SOIC (R Suffix)

OUT A

–IN A

+IN A

V–

V+

OUT B

–IN B

+IN B

01104-002

AD8572

TOP VIEW

(Not to Scale)

Figure 3. 8-Lead TSSOP (RU Suffix)

OUT A

–IN A

V+

OUT B

–IN B

+IN B

01104-005

AD8572

TOP VIEW

(Not to Scale)

+IN A

GENERAL DESCRIPTION

This family of amplifiers has ultralow offset, drift, and bias

current. The

AD8571/AD8572/AD8574

are single, dual, and

quad amplifiers, respectively, featuring rail-to-rail input and

output swings. All are guaranteed to operate from 2.7 V to 5 V

single supply.

The

AD8571/AD8572/AD8574

provide benefits previously

found only in expensive auto-zeroing or chopper-stabilized

amplifiers. Using Analog Devices, Inc., topology, these zero-

drift amplifiers combine low cost with high accuracy. (No

external capacitors are required.) Using a spread-spectrum,

auto-zero technique, the

AD8571/AD8572/AD8574

eliminate

the intermodulation effects from interaction of the chopping

function with the signal frequency in ac applications.

With an offset voltage of only 1 μV and drift of 0.005 μV/°C, the

AD8571/AD8572/AD8574

are perfectly suited for applications

where error sources cannot be tolerated. Position and pressure

sensors, medical equipment, and strain gage amplifiers benefit

greatly from nearly zero drift over their operating temperature

range. Many more systems require the rail-to-rail input and

output swings provided by the

AD8571/AD8572/AD8574.

V–

Figure 4. 8-Lead SOIC (R Suffix)

OUT A

–IN A

+IN A

V+

+IN B

–IN B

OUT B

OUT D

–IN D

+IN D

AD8574

V–

TOP VIEW

(Not to Scale)

+IN C

01104-003

–IN C

OUT C

Figure 5. 14-Lead TSSOP (RU Suffix)

OUT A

–IN A

+IN A

V+

+IN B

–IN B

OUT B

OUT D

–IN D

AD8574

+IN D

V–

TOP VIEW

(Not to Scale)

+IN C

–IN C

OUT C

Figure 6. 14-Lead SOIC (R Suffix)

Protected by U.S. Patent 6,130,578.

Document Feedback

The

AD8571/AD8572/AD8574

are specified for the extended

industrial/ automotive temperature range (−40°C to +125°C).

The

AD8571

single amplifier is available in 8-lead MSOP and

narrow SOIC packages. The

AD8572

dual amplifier is available in

8-lead narrow SOIC and surface-mount TSSOP packages. The

AD8574

quad amplifier is available in 14-lead narrow SOIC and

TSSOP packages.

Rev. F

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.

Technical Support

www.analog.com

01104-004

OUT A

TOP VIEW

(Not to Scale)

V–

AD8571/AD8572/AD8574

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

General Description ......................................................................... 1

Pin Configurations ........................................................................... 1

Revision History ............................................................................... 3

Specifications..................................................................................... 4

5 V Electrical Characteristics ...................................................... 4

2.7 V Electrical Characteristics................................................... 5

Absolute Maximum Ratings ............................................................ 6

Thermal Characteristics .............................................................. 6

ESD Caution .................................................................................. 6

Typical Performance Characteristics ............................................. 7

Functional Description .................................................................. 15

Amplifier Architecture .............................................................. 15

Basic Auto-Zero Amplifier Theory .......................................... 15

Auto-Zero Phase ......................................................................... 16

Amplification Phase ................................................................... 16

High Gain, CMRR, and PSRR .................................................. 17

Data Sheet

Maximizing Performance Through Proper Layout ............... 17

1/f Noise Characteristics ........................................................... 18

Random Auto-Zero Correction Eliminates Intermodulation

Distortion .................................................................................... 18

Broadband and External Resistor Noise Considerations .......... 19

Output Overdrive Recovery ...................................................... 19

Input Overvoltage Protection ................................................... 19

Output Phase Reversal ............................................................... 19

Capacitive Load Drive ............................................................... 20

Power-Up Behavior .................................................................... 20

Applications Information .............................................................. 21

5 V Precision Strain Gage Circuit ............................................ 21

3 V Instrumentation Amplifier ................................................ 21

High Accuracy Thermocouple Amplifier ............................... 22

Precision Current Meter ............................................................ 22

Precision Voltage Comparator.................................................. 22

Outline Dimensions ....................................................................... 23

Ordering Guide .......................................................................... 25

Rev. F | Page 2 of 28

Data Sheet

REVISION HISTORY

6/15—Rev. E to Rev. F

Added Patent Note, Note 1............................................................... 1

Change to Input Voltage Parameter, Table 3.................................. 6

Changes to Ordering Guide ...........................................................25

2/11—Rev. D to Rev. E

Changes to Figure 66 ......................................................................21

Updated Outline Dimensions ........................................................22

Changes to Ordering Guide ...........................................................23

6/08—Rev. C to Rev. D

Changes to Figure 19 and Figure 20 ............................................... 8

Changes to Figure 44 ......................................................................12

Changes to Figure 38 ......................................................................13

Moved Figure 50 and Figure 51 .....................................................14

Changes to Figure 66, Precision Current Meter Section, Layout,

Figure 67, Equation 24, and Figure 68 ..........................................21

5/07—Rev. B to Rev. C

Changes to Features .......................................................................... 1

Changes to Table 1 ............................................................................ 3

Changes to Table 2 ............................................................................ 4

Changes to Basic Auto-Zero Amplifier Theory Section ............14

Changes to Figure 50 ......................................................................15

Changes to Figure 55 ......................................................................16

Changes to Figure 66 ......................................................................21

Updated Outline Dimensions ........................................................22

AD8571/AD8572/AD8574

9/06—Rev. A to Rev. B

Updated Format ................................................................. Universal

Changes to Table 1 ............................................................................ 3

Changes to Table 2 ............................................................................ 4

Changes to Figure 50 ...................................................................... 14

Changes to Figure 51 ...................................................................... 15

Changes to Figure 66 ...................................................................... 21

Deleted Figure 69 and SPICE Macro-Model Section ................. 17

Deleted SPICE Macro-Model for the AD857x Section .............. 18

Updated Outline Dimensions........................................................ 22

Changes to Ordering Guide ........................................................... 23

7/03—Rev. 0 to Rev. A

Renumbered Figures .......................................................... Universal

Changes to Ordering Guide ............................................................. 4

Change to Figure 15. ....................................................................... 16

Updated Outline Dimensions........................................................ 19

10/99—Revision 0: Initial Version

Rev. F | Page 3 of 28

AD8572ARUZ Related Products

	AD8572ARUZ	AD8571ARZ
Description		Gain bandwidth product (GBP): 1.5MHz Number of amplifier groups: 1 Op amp type: Zero-Drift Power consumption of each channel: - Slew rate (SR): 0.4 V/us Power supply voltage: 2.7V ~ 5.5V ICOPAMPCHOPPER1.5MHZ8SOIC

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