AD8221BRZ datasheet, PDF - EEWORLD Datasheet

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AD8221BRZ: DescriptionINST Amp Single ±18V 8-Pin SOIC N Tube; CategoryAnalog mixed-signal IC Amplifier circuit; File Size586KB，24 Pages; ManufacturerADI; Websitehttps://www.analog.com; Environmental Compliance

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AD8221BRZ Overview

INST Amp Single ±18V 8-Pin SOIC N Tube

AD8221BRZ Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Compliant
ECCN (US)	EAR99
Part Status	Active
HTS	8542.33.00.01
Number of Channels per Chip	1
Maximum Voltage Gain (dB)	60
Maximum Voltage Gain Range (dB)	60 to 75
Minimum CMRR (dB)	140
Minimum CMRR Range (dB)	>=130
Minimum PSRR (dB)	140
Maximum Input Offset Voltage (mV)	0.025@±15V
Maximum Operating Supply Voltage (V)	±18
Maximum Supply Voltage Range (V)	30 to 50
Minimum Dual Supply Voltage (V)	±2.3
Typical Dual Supply Voltage (V)	±3\|±5\|±9\|±12\|±15
Maximum Dual Supply Voltage (V)	±18
Maximum Input Bias Current (uA)	0.0004@±15V
Maximum Input Resistance (MOhm)	100000(Typ)@±15V
Power Supply Type	Dual
Maximum Power Dissipation (mW)	200
Minimum Operating Temperature (°C)	-40
Maximum Operating Temperature (°C)	125
Supplier Temperature Grade	Industrial
Packaging	Tube
Pin Count	8
Standard Package Name	SOP
Supplier Package	SOIC N
Mounting	Surface Mount
Package Height	1.5(Max)
Package Length	5(Max)
Package Width	4(Max)
PCB changed	8
Lead Shape	Gull-wing

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Precision Instrumentation Amplifier

AD8221

FEATURES

Easy to use

Available in space-saving MSOP

Gain set with 1 external resistor (gain range 1 to 1000)

Wide power supply range: ±2.3 V to ±18 V

Temperature range for specified performance:

−40°C to +85°C

Operational up to 125°C

Excellent AC specifications

80 dB minimum CMRR to 10 kHz (G = 1)

825 kHz, –3 dB bandwidth (G = 1)

2 V/µs slew rate

Low noise

8 nV/√Hz, @ 1 kHz, maximum input voltage noise

0.25 µV p-p input noise (0.1 Hz to 10 Hz)

High accuracy dc performance (AD8221BR)

90 dB minimum CMRR (G = 1)

25 µV maximum input offset voltage

0.3 µV/°C maximum input offset drift

0.4 nA maximum input bias current

CONNECTION DIAGRAM

–IN

+IN

OUT

REF

AD8221

TOP VIEW

Figure 1.

120

110

100

COMPETITOR 1

COMPETITOR 2

AD8221

CMRR (dB)

03149-001

–V

APPLICATIONS

Weigh scales

Industrial process controls

Bridge amplifiers

Precision data acquisition systems

Medical instrumentation

Strain gages

Transducer interfaces

100

FREQUENCY (Hz)

10k

100k

Figure 2. Typical CMRR vs. Frequency for G = 1

Low voltage offset, low offset drift, low gain drift, high gain

accuracy, and high CMRR make this part an excellent choice

in applications that demand the best dc performance possible,

such as bridge signal conditioning.

Programmable gain affords the user design flexibility. A single

resistor sets the gain from 1 to 1000. The AD8221 operates on

both single and dual supplies and is well suited for applications

where ±10 V input voltages are encountered.

The AD8221 is available in a low cost 8-lead SOIC and 8-lead

MSOP, both of which offer the industry’s best performance. The

MSOP requires half the board space of the SOIC, making it ideal

for multichannel or space-constrained applications.

Performance is specified over the entire industrial temperature

range of −40°C to +85°C for all grades. Furthermore, the AD8221

is operational from −40°C to +125°C

GENERAL DESCRIPTION

The AD8221 is a gain programmable, high performance

instrumentation amplifier that delivers the industry’s highest

CMRR over frequency in its class. The CMRR of instrumentation

amplifiers on the market today falls off at 200 Hz. In contrast,

the AD8221 maintains a minimum CMRR of 80 dB to 10 kHz

for all grades at G = 1. High CMRR over frequency allows the

AD8221 to reject wideband interference and line harmonics,

greatly simplifying filter requirements. Possible applications

include precision data acquisition, biomedical analysis, and

aerospace instrumentation.

See Typical Performance Characteristics for expected operation from

85°C to 125°C.

Rev. C

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.

www.analog.com

Tel: 781.329.4700

03149-002

AD8221

TABLE OF CONTENTS

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

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

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

Connection Diagram ....................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Absolute Maximum Ratings ............................................................ 8

Thermal Characteristics .............................................................. 8

ESD Caution .................................................................................. 8

Pin Configuration and Function Descriptions ............................. 9

Typical Performance Characteristics ........................................... 10

Theory of Operation ...................................................................... 17

Gain Selection ............................................................................. 18

Layout .......................................................................................... 18

Reference Terminal .................................................................... 19

Power Supply Regulation and Bypassing ................................ 19

Input Bias Current Return Path ............................................... 19

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

RF Interference ........................................................................... 20

Precision Strain Gage ................................................................. 20

Conditioning ±10 V Signals for a +5 V Differential Input

ADC ............................................................................................. 20

AC-Coupled Instrumentation Amplifier ................................ 21

Die Information .............................................................................. 22

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

Ordering Guide .......................................................................... 24

REVISION HISTORY

3/11—Rev. B to Rev. C

Added Pin Configuration and Function Descriptions Section .. 9

Added Die Information Section ................................................... 22

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

Changes to Ordering Guide .......................................................... 24

9/07—Rev. A to Rev. B

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

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

Changes to Table 2 Layout ............................................................... 5

Changes to Figure 15 ...................................................................... 11

Changes to Figures 32 .................................................................... 13

Changes to Figure 33, Figure 34, and Figure 35 ......................... 14

Updated Outline Dimensions ....................................................... 21

Changes to Ordering Guide .......................................................... 22

11/03—Rev. 0 to Rev. A

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

Changes to Specifications Section .................................................. 4

Changes to Theory of Operation Section .................................... 13

Changes to Gain Selection Section............................................... 14

10/03—Revision 0: Initial Version

Rev. C | Page 2 of 24

AD8221BRZ Related Products

	AD8221BRZ	AD8221AC-P7	AD8221ARZ	AD8221BRZ-RL	AD8221ARZ-RL	AD8221ARMZ	AD8221BRZ-R7	AD8221ARZ-R7	AD8221ARMZ-R7
Description	INST Amp Single ±18V 8-Pin SOIC N Tube	Precision Instrumentation Amplifier	INST Amp Single ±18V 8-Pin SOIC N Tube	INST Amp Single ±18V 8-Pin SOIC N T/R	INST Amp Single ±18V 8-Pin SOIC N T/R	INST Amp Single ±18V 8-Pin MSOP Tube	INST Amp Single ±18V 8-Pin SOIC N T/R	INST Amp Single ±18V 8-Pin SOIC N T/R	INST Amp Single ±18V 8-Pin MSOP T/R
EU restricts the use of certain hazardous substances	Compliant	-	Compliant	-	Compliant	Compliant	Compliant	Compliant	Compliant
ECCN (US)	EAR99	-	EAR99	-	EAR99	EAR99	EAR99	EAR99	EAR99
Part Status	Active	-	Active	-	Active	Active	Active	Active	Active
HTS	8542.33.00.01	-	8542.33.00.01	-	8542.33.00.01	8542.33.00.01	8542.33.00.01	8542.33.00.01	8542.33.00.01
Number of Channels per Chip	1	-	1	-	1	1	1	1	1
Maximum Voltage Gain (dB)	60	-	60	-	60	60	60	60	60
Maximum Voltage Gain Range (dB)	60 to 75	-	60 to 75	-	60 to 75	60 to 75	60 to 75	60 to 75	60 to 75
Minimum CMRR (dB)	140	-	130	-	130	130	140	130	130
Minimum CMRR Range (dB)	>=130	-	>=130	-	>=130	>=130	>=130	>=130	>=130
Minimum PSRR (dB)	140	-	130	-	130	120	140	130	120
Maximum Input Offset Voltage (mV)	0.025@±15V	-	0.06@±15V	-	0.06@±15V	0.07@±15V	0.025@±15V	0.06@±15V	0.07@±15V
Maximum Operating Supply Voltage (V)	±18	-	±18	-	±18	±18	±18	±18	±18
Maximum Supply Voltage Range (V)	30 to 50	-	30 to 50	-	30 to 50	30 to 50	30 to 50	30 to 50	30 to 50
Minimum Dual Supply Voltage (V)	±2.3	-	±2.3	-	±2.3	±2.3	±2.3	±2.3	±2.3
Typical Dual Supply Voltage (V)	±3\|±5\|±9\|±12\|±15	-	±3\|±5\|±9\|±12\|±15	-	±15\|±12\|±9\|±5\|±3	±3\|±5\|±9\|±12\|±15	±3\|±5\|±9\|±12\|±15	±3\|±5\|±9\|±12\|±15	±15\|±12\|±9\|±5\|±3
Maximum Dual Supply Voltage (V)	±18	-	±18	-	±18	±18	±18	±18	±18
Maximum Input Bias Current (uA)	0.0004@±15V	-	0.0015@±15V	-	0.0015@±15V	0.002@±15V	0.0004@±15V	0.0015@±15V	0.002@±15V
Maximum Input Resistance (MOhm)	100000(Typ)@±15V	-	100000(Typ)@±15V	-	100000(Typ)@±15V	100000(Typ)@±15V	100000(Typ)@±15V	100000(Typ)@±15V	100000(Typ)@±15V
Power Supply Type	Dual	-	Dual	-	Dual	Dual	Dual	Dual	Dual
Maximum Power Dissipation (mW)	200	-	200	-	200	200	200	200	200
Minimum Operating Temperature (°C)	-40	-	-40	-	-40	-40	-40	-40	-40
Maximum Operating Temperature (°C)	125	-	125	-	125	125	125	125	125
Supplier Temperature Grade	Industrial	-	Industrial	-	Industrial	Industrial	Industrial	Industrial	Industrial
Packaging	Tube	-	Tube	-	Tape and Reel	Tube	Tape and Reel	Tape and Reel	Tape and Reel
Pin Count	8	-	8	-	8	8	8	8	8
Standard Package Name	SOP	-	SOP	-	SOP	SOP	SOP	SOP	SOP
Supplier Package	SOIC N	-	SOIC N	-	SOIC N	MSOP	SOIC N	SOIC N	MSOP
Mounting	Surface Mount	-	Surface Mount	-	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package Height	1.5(Max)	-	1.5(Max)	-	1.5(Max)	0.85	1.5(Max)	1.5(Max)	0.85
Package Length	5(Max)	-	5(Max)	-	5(Max)	3	5(Max)	5(Max)	3
Package Width	4(Max)	-	4(Max)	-	4(Max)	3	4(Max)	4(Max)	3
PCB changed	8	-	8	-	8	8	8	8	8
Lead Shape	Gull-wing	-	Gull-wing	-	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing

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