Analog Devices AD623BR-REEL7, AD623BR-REEL, AD623BR, AD623BN, AD623ARM-REEL7 Datasheet

Single Supply, Rail-to-Rail, Low Cost

8

7

6

5

3
4

2R

G

2IN
1IN

2V

S

1R

G

1V

S

OUTPUT

REF

AD623

1
2

a

FEATURES
Easy to Use
Higher Performance than Discrete Design
Single and Dual Supply Operation
Rail-to-Rail Output Swing
Input Voltage Range Extends 150 mV Below Ground

(Single Supply)
Low Power, 575 mA Max Supply Current
Gain Set with One External Resistor

Gain Range 1 (No Resistor) to 1,000

HIGH ACCURACY DC PERFORMANCE

0.1% Gain Accuracy (G = 1)

0.35% Gain Accuracy (G > 1)
25 ppm Gain Drift (G = 1)
200 mV Max Input Offset Voltage (AD623A)
2 mV/8C Max Input Offset Drift (AD623A)
100 mV Max Input Offset Voltage (AD623B)
1 mV/8C Max Input Offset Drift (AD623B)
25 nA Max Input Bias Current

NOISE

35 nV/√Hz RTI Noise @ 1 kHz (G = 1)

EXCELLENT AC SPECIFICATIONS
90 dB Min CMRR (G = 10); 84 dB Min CMRR (G = 5)

(@ 60 Hz, 1K Source Imbalance)
800 kHz Bandwidth (G = 1)
20 ms Settling Time to 0.01% (G = 10)

APPLICATIONS
Low Power Medical Instrumentation
Transducer Interface
Thermocouple Amplifier
Industrial Process Controls
Difference Amplifier
Low Power Data Acquisition

PRODUCT DESCRIPTION

The AD623 is an integrated single supply instrumentation am­plifier that delivers rail-to-rail output swing on a single supply
(+3 V to +12 V supplies). The AD623 offers superior user flex­ibility by allowing single gain set resistor programming, and
conforming to the 8-lead industry standard pinout configura­tion. With no external resistor, the AD623 is configured for
unity gain (G = 1) and with an external resistor, the AD623 can
be programmed for gains up to 1,000.

The AD623 holds errors to a minimum by providing superior
AC CMRR that increases with increasing gain. Line noise, as
well as line harmonics, will be rejected since the CMRR re­mains constant up to 200 Hz. The AD623 has a wide input

Instrumentation Amplifier

AD623

CONNECTION DIAGRAM

8-Lead Plastic DIP (N),

SOIC (R) and mSOIC (RM) Packages

common-mode range and can amplify signals that have a
common-mode voltage 150 mV below ground. Although the
design of the AD623 has been optimized to operate from a single
supply, the AD623 still provides superior performance when

operated from a dual voltage supply (± 2.5 V to ±6.0 V).

Low power consumption (1.5 mW at 3 V), wide supply voltage
range, and rail-to-rail output swing make the AD623 ideal for
battery powered applications. The rail-to-rail output stage maxi­mizes the dynamic range when operating from low supply volt­ages. The AD623 replaces discrete instrumentation amplifier
designs and offers superior linearity, temperature stability and
reliability in a minimum of space. Until the AD623, this level of
instrumentation amplifier performance has not been achieved.

120

110

100

90

80

70

CMR – dB

60

50

40

30

1

10 100 1k 10k

FREQUENCY – Hz

Figure 1. CMR vs. Frequency, +5 VS, 0 V

x1000

x100

x10

x1

100k

S

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

AD623–SPECIFICATIONS

SINGLE SUPPLY

(typical @ +258C Single Supply, VS = +5 V, and RL = 10 kV, unless otherwise noted)

Model AD623A AD623ARM AD623B
Specification Conditions Min Typ Max Min Typ Max Min Typ Max Units

GAIN G = 1 + (100 k/RG)

Gain Range 1 1000 1 1000 1 1000
Gain Error

1

G1 V

OUT

=

0.05 V to 3.5 V
G > 1 V

OUT

=

0.05 V to 4.5 V
G = 1 0.03 0.10 0.03 0.10 0.03 0.05 %
G = 10 0.10 0.35 0.10 0.35 0.10 0.35 %
G = 100 0.10 0.35 0.10 0.35 0.10 0.35 %
G = 1000 0.10 0.35 0.10 0.35 0.10 0.35 %

Nonlinearity, G1 V

OUT

=

0.05 V to 3.5 V

G > 1 V

OUT

=

0.05 V to 4.5 V
G = 1–1000 50 50 50 ppm
Gain vs. Temperature

G = 1 5 10 5 10 5 10 ppm/°C

1

G > 1

50 50 50 ppm/°C

VOLTAGE OFFSET Total RTI Error =

V

+ V

Input Offset, V

OSI

OSI

OSO

/G

25 200 200 500 25 100 µV
Over Temperature 350 650 160 µV
Average TC 0.1 2 0.1 2 0.1 1 µV/°C

Output Offset, V

OSO

200 1000 500 2000 200 500 µV
Over Temperature 1500 2600 1100 µV
Average TC 2.5 10 2.5 10 2.5 10 µV/°C

Offset Referred to the Input

vs. Supply (PSR)

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

INPUT CURRENT

Input Bias Current 17 25 17 25 17 25 nA

Over Temperature 27.5 27.5 27.5 nA

Average TC 25 25 25 pA/°C

Input Offset Current 0.25 2 0.25 2 0.25 2 nA

Over Temperature 2.5 2.5 2.5 nA

Average TC 5 5 5 pA/°C

INPUT

Input Impedance

Differential 2i22i22i2GΩipF
Common-Mode 2i22i22i2GΩipF

Input Voltage Range

2

VS = +3 V to +12 V (–VS) – 0.15 (+VS) – 1.5 (–VS) – 0.15 (+VS) – 1.5 (–VS) – 0.15 (+VS) – 1.5 V

Common-Mode Rejection at

60 Hz with 1 kΩ Source

Imbalance

G = 1 VCM = 0 V to 3 V 70 80 70 80 77 86 dB
G = 10 VCM = 0 V to 3 V 90 100 90 100 94 100 dB
G = 100 VCM = 0 V to 3 V 105 110 105 110 105 110 dB
G = 1000 VCM = 0 V to 3 V 105 110 105 110 105 110 dB

OUTPUT

Output Swing R

= 10 kΩ +0.01 (+V

L

R

= 100 kΩ +0.01 (+V

L

) – 0.5 +0.01 (+VS) – 0.5 +0.01 (+VS) – 0.5 V

S

) – 0.15 +0.01 (+VS) – 0.15 +0.01 (+VS) – 0.15 V

S

DYNAMIC RESPONSE

Small Signal –3 dB

Bandwidth

G = 1 800 800 800 kHz
G = 10 100 100 100 kHz
G = 100 10 10 10 kHz
G = 1000 2 2 2 kHz

Slew Rate 0.3 0.3 0.3 V/µs

Settling Time to 0.01% VS = +5 V

G = 1 Step Size: 3.5 V 30 30 30 µ s

G = 10 Step Size: 4 V,

V

= 1.8 V 20 20 20 µs

CM

–2–

REV. C

AD623

DUAL SUPPLIES

(typical @ +258C Dual Supply, VS = 65 V, and RL = 10 kV, unless otherwise noted)

Model AD623A AD623ARM AD623B
Specification Conditions Min Typ Max Min Typ Max Min Typ Max Units

GAIN G = 1 + (100 k/RG)

Gain Range 1 1000 1 1000 1 1000
Gain Error

1

G1 V

OUT

=
–4.8 V to 3.5 V
G > 1 V

OUT

=

0.05 V to 4.5 V

G = 1 0.03 0.10 0.03 0.10 0.03 0.05 %
G = 10 0.10 0.35 0.10 0.35 0.10 0.35 %
G = 100 0.10 0.35 0.10 0.35 0.10 0.35 %
G = 1000 0.10 0.35 0.10 0.35 0.10 0.35 %

Nonlinearity, G1 V

OUT

=
–4.8 V to 3.5 V
G > 1 V

OUT

=

–4.8 V to 4.5 V

G = 1–1000 50 50 50 ppm
Gain vs. Temperature

G = 1 5 10 5 10 5 10 ppm/°C

1

G > 1

50 50 50 ppm/°C

VOLTAGE OFFSET Total RTI Error =

V

+ V

Input Offset, V

OSI

OSI

OSO

/G

25 200 200 500 25 100 µV
Over Temperature 350 650 160 µV
Average TC 0.1 2 0.1 2 0.1 1 µV/°C

Output Offset, V

OSO

200 1000 500 2000 200 500 µV
Over Temperature 1500 2600 1100 µV
Average TC 2.5 10 2.5 10 2.5 10 µV/°C

Offset Referred to the Input

vs. Supply (PSR)

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

INPUT CURRENT

Input Bias Current 17 25 17 25 17 25 nA

Over Temperature 27.5 27.5 27.5 nA

Average TC 25 25 25 pA/°C

Input Offset Current 0.25 2 0.25 2 0.25 2 nA

Over Temperature 2.5 2.5 2.5 nA

Average TC 5 5 5 pA/°C

INPUT

Input Impedance

Differential 2i22i22i2GΩipF
Common-Mode 2i22i22i2GΩipF

Input Voltage Range

2

V

= +2.5 V to ±6 V (–V

S

) – 0.15 (+VS) – 1.5 (–VS) –0.15 (+VS) – 1.5 (–VS) – 0.15 (+VS) – 1.5 V

S

Common-Mode Rejection at

60 Hz with 1 kΩ Source

Imbalance

G = 1 VCM = +3.5 V to –5.15 V 70 80 70 80 77 86 dB
G = 10 VCM = +3.5 V to –5.15 V 90 100 90 100 94 100 dB
G = 100 VCM = +3.5 V to –5.15 V 105 110 105 110 105 110 dB
G = 1000 VCM = +3.5 V to –5.15 V 105 110 105 110 105 110 dB

OUTPUT

Output Swing R

= 10 kΩ, VS = ±5 V (–V

L

R

= 100 kΩ (–V

L

) +0. 2 (+VS) – 0.5 (–VS) + 0.2 (+VS) – 0.5 (–VS) + 0.2 (+VS) – 0.5 V

S

) + 0.05 (+VS) – 0.15 (–VS) + 0.05 (+VS) – 0.15 (–VS) + 0.05 (+VS) – 0.15 V

S

DYNAMIC RESPONSE

Small Signal –3 dB

Bandwidth

G = 1 800 800 800 kHz
G = 10 100 100 100 kHz
G = 100 10 10 10 kHz
G = 1000 2 2 2 kHz

Slew Rate 0.3 0.3 0.3 V/µs

Settling Time to 0.01% V

= ±5 V, 5 V Step

S

G = 1 30 30 30 µ s
G = 10 20 20 20 µ s

–3–REV. C

AD623–SPECIFICATIONS

WARNING!

ESD SENSITIVE DEVICE

BOTH DUAL AND SINGLE SUPPLIES

Model AD623A AD623ARM AD623B
Specification Conditions Min Typ Max Min Typ Max Min Typ Max Units

NOISE

Voltage Noise, 1 kHz Total RTI Noise =

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

RTI, 0.1 Hz to 10 Hz

G = 1 3.0 3.0 3.0 µV p-p
G = 1000 1.5 1.5 1.5 µV p-p

Current Noise f = 1 kHz 100 100 100 fA/√Hz

0.1 Hz to 10 Hz 1.5 1.5 1.5 pA p-p

REFERENCE INPUT

R

IN

I

IN

Voltage Range –V

Gain to Output 1 ± 0.0002 1 ± 0.0002 1 ± 0.0002 V

POWER SUPPLY

Operating Range Dual Supply ±2.5 ±6 ±2.5 ±6 ±2.5 ±6V

Quiescent Current Dual Supply 375 550 375 550 375 550 µA

Over Temperature 625 625 625 µA

TEMPERATURE RANGE

For Specified Performance –40 to +85 –40 to +85 –40 to +85 °C

NOTES

1

Does not include effects of external resistor RG.

2

One input grounded. G = 1.

Specifications subject to change without notice.

ABSOLUTE MAXIMUM RATINGS

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±6 V

Internal Power Dissipation

ni

no

V

, V

= 0 +50 +60 +50 +60 +50 +60 µA

IN+

REF

Single Supply +2.7 +12 +2.7 +12 +2.7 +12 V

Single Supply 305 480 305 480 305 480 µA

1

2

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



e

ni

2

+ e



Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . ±6 V

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

Storage Temperature Range

(N, R, RM) . . . . . . . . . . . . . . . . . . . . . . . –65°C to +125°C

Operating Temperature Range

(A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C

2





/G

no





ORDERING GUIDE

35 35 35 nV/√Hz
50 50 50 nV/√Hz

100 ±20% 100 ±20% 100 ±20% kΩ

S

+VS–V

S

+VS–V

S

+V

S

Lead Temperature Range

(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 DIP Package: θ
8-Lead SOIC Package: θ

8-Lead µSOIC Package: θJA = 200°C/W

= 95°C/W

JA

= 155°C/W

JA

V

Temperature Package Package Brand

Model Range Description Option Code

AD623AN –40°C to +85°C 8-Lead Plastic DIP N-8
AD623AR –40°C to +85°C 8-Lead SOIC SO-8
AD623ARM –40°C to +85°C 8-Lead µSOIC RM-8 J0A
AD623AR-REEL –40°C to +85°C 13" Tape and Reel SO-8
AD623AR-REEL7 –40°C to +85°C 7" Tape and Reel SO-8
AD623ARM-REEL –40°C to +85°C 13" Tape and Reel RM-8 J0A
AD623ARM-REEL7 –40°C to +85°C 7" Tape and Reel RM-8 J0A
AD623BN –40°C to +85°C 8-Lead Plastic DIP N-8
AD623BR –40°C to +85°C 8-Lead SOIC SO-8
AD623BR-REEL –40°C to +85°C 13" Tape and Reel SO-8
AD623BR-REEL7 –40°C to +85°C 7" Tape and Reel SO-8

ESD SUSCEPTIBILITY

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 volts, which
readily accumulate on the human body and on test equipment, can discharge without detection.
Although the AD623 features proprietary ESD protection circuitry, permanent damage may still
occur on these devices if they are subjected to high energy electrostatic discharges. Therefore, proper
ESD precautions are recommended to avoid any performance degradation or loss of functionality.

–4–

REV. C

Typical Characteristics

INPUT OFFSET CURRENT – nA

150

0

–0.245 –0.21

UNITS

–0.24 –0.235 –0.23 –0.225 –0.22 –0.215

90

60

30

120

180

210

(@ +258C VS = 65 V, R

= 10 kV unless otherwise noted)–

L

AD623

300
280
260
240
220
200
180
160
140

UNITS

120
100

80
60
40
20

0

–100

–80

–60 –20–40

INPUT OFFSET VOLTAGE – mV

20 120

140

1008060400

Figure 2. Typical Distribution of Input Offset Voltage;
Package Option N-8, SO-8

480

420

360

300

240

UNITS

180

120

60

0

–800 –600

–400 –200

OUTPUT OFFSET VOLTAGE 2 mV

0 200 400 600 800

22
20
18

16
14
12
10

UNITS

8
6
4
2
0

–600

–300 –200 –100

–5000–400

OUTPUT OFFSET VOLTAGE – mV

100 200 300 400

500

Figure 5. Typical Distribution of Output Offset Voltage,
V

= +5, Single Supply, V

S

= –0.125 V; Package Option

REF

N-8, SO-8

Figure 3. Typical Distribution of Output Offset Voltage;
Package Option N-8, SO-8

22
20
18
16
14
12
10

UNITS

8

Figure 4. Typical Distribution of Input Offset Voltage,
V

S

6
4
2
0

–80 –60

–40 –20

INPUT OFFSET VOLTAGE – mV

= +5, Single Supply, V

N-8, SO-8

0 20 40 60 80 100

= –0.125 V; Package Option

REF

Figure 6. Typical Distribution for Input Offset Current;
Package Option N-8, SO-8

20
18
16
14
12
10

UNITS

8
6

4
2
0

–0.025

–0.02

–0.015 –0.01 –0.005

INPUT OFFSET CURRENT – nA

0 0.005

Figure 7. Typical Distribution for Input Offset Current,

= +5, Single Supply, V

V

S

= –0.125 V; Package Option

REF

N-8, SO-8

–5–REV. C

0.01