Analog Devices AD622AR-REEL7, AD622AR-REEL, AD622AR, AD622AN Datasheet

Low Cost

a

FEATURES
Easy to Use
Low Cost Solution
Higher Performance than Two or Three Op Amp Design
Unity Gain with No External Resistor
Optional Gains with One External Resistor

(Gain Range 2 to 1000)
Wide Power Supply Range (ⴞ2.6 V to ⴞ15 V)
Available in 8-Lead PDIP and SOIC
Low Power, 1.5 mA max Supply Current

GOOD DC PERFORMANCE

0.15% Gain Accuracy (G = 1)
125 ␮V max Input Offset Voltage

1.0 ␮V/ⴗC max Input Offset Drift
5 nA max Input Bias Current
66 dB min Common-Mode Rejection Ratio (G = 1)

NOISE

12 nV/√Hz @ 1 kHz Input Voltage Noise

0.60 ␮V

EXCELLENT AC CHARACTERISTICS
800 kHz Bandwidth (G = 10)
10 ␮s Settling Time to 0.1% @ G = 1–100

1.2 V/␮s Slew Rate

APPLICATIONS
Transducer Interface
Low Cost Thermocouple Amplifier
Industrial Process Controls
Difference Amplifier
Low Cost Data Acquisition

p-p Noise (0.1 Hz to 10 Hz, G = 10)

Instrumentation Amplifier

AD622

CONNECTION DIAGRAM

1

R

G

–IN

2

3

+IN

–V

4

S

PRODUCT DESCRIPTION

AD622

The AD622 is a low cost, moderately accurate instrumentation
amplifier that requires only one external resistor to set any gain
between 2 and 1,000. Or for a gain of 1, no external resistor
is required. The AD622 is a complete difference or subtracter
amplifier “system” while providing superior linearity and common­mode rejection by incorporating precision laser trimmed resistors.

The AD622 replaces low cost, discrete, two or three op amp
instrumentation amplifier designs and offers good common­mode rejection, superior linearity, temperature stability, reliabil­ity, and board area consumption. The low cost of the AD622
eliminates the need to design discrete instrumentation amplifi­ers to meet stringent cost targets. While providing a lower cost
solution, it also provides performance and space improvements.

8

7

6

5

R

G

+V

S

OUTPUT

REF

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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] World Wide Web Site: http://www.analog.com
Fax: [phone] © Analog Devices, Inc., 1999

AD622–SPECIFICATIONS

(typical @ +25ⴗC, VS = ⴞ15 V, and RL = 2 k⍀ unless otherwise noted)

AD622

Model Conditions Min Typ Max Units

GAIN G = 1 + (50.5 k/R

Gain Range 1 1000
Gain Error

1

V

OUT

= ±10 V

)

G

G = 1 0.05 0.15 %
G = 10 0.2 0.50 %
G = 100 0.2 0.50 %
G = 1000 0.2 0.50 %

Nonlinearity, V

G = 1–1000 R
G = 1–100 R

Gain vs. Temperature Gain = 1 10 ppm/°C

VOLTAGE OFFSET (Total RTI Error = V

Input Offset, V

OSI

Average TC V

Output Offset, V

OSO

Average TC V

= ±10 V

OUT

= 10 kΩ 10 ppm

L

= 2 kΩ 10 ppm

L

Gain >1

V

V

1

+ V

OSO

/G)

= ±5 V to ±15 V 60 125 µV

S

= ±5 V to ±15 V 1.0 µV/°C

S

= ±5 V to ±15 V 600 1500 µV

S

= ±5 V to ±15 V 15 µV/°C

S

OSI

–50 ppm/°C

Offset Referred to the

Input vs.
Supply (PSR) V

= ±5 V to ±15 V

S

G = 1 80 100 dB
G = 10 95 120 dB
G = 100 110 140 dB
G = 1000 110 140 dB

INPUT CURRENT

Input Bias Current 2.0 5.0 nA

Average TC 3.0 pA/°C

Input Offset Current 0.7 2.5 nA

Average TC 2.0 pA/°C

INPUT

Input Impedance

Differential 10储2GΩ储pF
Common-Mode 10储2GΩ储pF

Input Voltage Range

Over Temperature –V

Over Temperature –V

2

V

= ±2.6 V to ±5 V –V

S

= ±5 V to ±18 V –V

V

S

+ 1.9 +VS – 1.2 V

S

+ 2.1 +VS – 1.3 V

S

+ 1.9 +VS – 1.4 V

S

+ 2.1 +VS – 1.4 V

S

Common-Mode Rejection

Ratio DC to 60 Hz with

1 kΩ Source Imbalance V

= 0 V to ±10 V

CM

G = 1 66 78 dB
G = 10 86 98 dB
G = 100 103 118 dB
G = 1000 103 118 dB

OUTPUT

Output Swing R

Over Temperature –V

Over Temperature –V

= 10 kΩ,

L

= ±2.6 V to ±5 V –V

V

S

V

= ±5 V to ±18 V –V

S

+ 1.1 +VS – 1.2 V

S

+ 1.4 +VS – 1.3 V

S

+ 1.2 +VS – 1.4 V

S

+ 1.6 +VS – 1.5 V

S

Short Current Circuit ±18 mA

–2–

REV. C

AD622

AD622

Model Conditions Min Typ Max Units

DYNAMIC RESPONSE

Small Signal –3 dB Bandwidth

G = 1 1000 kHz
G = 10 800 kHz
G = 100 120 kHz
G = 1000 12 kHz

Slew Rate 1.2 V/µs

Settling Time to 0.1% 10 V Step

G = 1–100 10 µs

NOISE

Voltage Noise, 1 kHz

Input, Voltage Noise, e
Output, Voltage Noise, e

ni

no

Total RTI Noise = (e

RTI, 0.1 Hz to 10 Hz

G = 1 4.0 µV p-p
G = 10 0.6 µV p-p
G = 100–1000 0.3 µV p-p

Current Noise f = 1 kHz 100 fA/√Hz

0.1 Hz to 10 Hz 10 pA p-p

REFERENCE INPUT

R

IN

I

IN

V

, V

IN+

= 0 +50 +60 µA

REF

Voltage Range –V

Gain to Output 1 ± 0.0015

POWER SUPPLY

Operating Range
Quiescent Current V

3

= ±2.6 V to ±18 V 0.9 1.3 mA

S

Over Temperature 1.1 1.5 mA

TEMPERATURE RANGE

For Specified Performance –40 to +85 °C

NOTES

1

Does not include effects of external resistor RG.

2

One input grounded. G = 1.

3

This is defined as the same supply range that is used to specify PSR.

Specifications subject to change without notice.

2

) +(e

ni

2

/ G)

no

12 nV/√Hz
72 nV/√Hz

20 kΩ

+ 1.6 +VS – 1.6 V

S

±2.6 ±18 V

REV. C

–3–

AD622

ABSOLUTE MAXIMUM RATINGS

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18 V

Internal Power Dissipation

2

. . . . . . . . . . . . . . . . . . . . 650 mW

Input Voltage (Common Mode) . . . . . . . . . . . . . . . . . . . ±V

Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . ±25 V

Output Short Circuit Duration . . . . . . . . . . . . . . . . Indefinite

Storage Temperature Range (N, R) . . . . . . . –65°C to +125°C

Operating Temperature Range

AD622A . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to +85°C

Lead Temperature Range

1

ORDERING GUIDE

Temperature Package

Model Range Option*

S

AD622AN –40°C to +85°C N-8
AD622AR –40°C to +85°C SO-8
AD622AR-REEL –40°C to +85°C 13" Reel
AD622AR-REEL7 –40°C to +85°C 7" Reel

*N = Plastic DIP, SO = Small Outline.

(Soldering 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . +300°C

NOTES

1

Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.

2

Specification is for device in free air:

8-Lead Plastic Package: θJA = 95°C/Watt
8-Lead SOIC Package: θJA = 155°C/Watt

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD622 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE

Typical Characteristics

50

SAMPLE SIZE = 191

40

30

20

PERCENTAGE OF UNITS

10

0

–0.40

OUTPUT OFFSET VOLTAGE – mV

(@ +25ⴗC, VS = ⴞ15 V, RL = 2 k⍀, unless otherwise noted)

0 0.40

0.80 1.00–1.00 –0.80

Figure 1. Typical Distribution of Output Offset Voltage

50

40

30

20

PERCENTAGE OF UNITS

10

SAMPLE SIZE = 383

0

60 80 100 120 140

COMMON-MODE REJECTION RATIO – dB

Figure 2. Typical Distribution of Common-Mode Rejection

–4–

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