Analog Devices AD626AR-REEL7, AD626AR-REEL, AD626AR, AD626AN Datasheet

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8

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5

AD626

1/6

200kV

–IN

ANALOG

GND

–V

S

FILTER

+IN

G = 100

OUT

+V

S

100kV

G

=

2

G = 30

200kV

Low Cost, Single Supply

25

0

5

15

5

2

10

1

20

4

3

POWER SUPPLY VOLTAGE – 6Volts

INPUT COMMON MODE RANGE – Volts

6VCM FOR SINGLE
AND DUAL SUPPLIES

6VCM FOR DUAL
SUPPLIES ONLY

a

FEATURES
Pin Selectable Gains of 10 and 100
True Single Supply Operation

Single Supply Range of +2.4 V to +10 V
Dual Supply Range of ⴞ1.2 V to ⴞ6 V

Wide Output Voltage Range of 30 mV to 4.7 V
Optional Low-Pass Filtering
Excellent DC Performance

Low Input Offset Voltage: 500 ␮V max

Large Common-Mode Range: 0 V to +54 V

Low Power: 1.2 mW (V

Good CMR of 90 dB typ
AC Performance

Fast Settling Time: 24 ␮s (0.01%)
Includes Input Protection

Series Resistive Inputs (R

RFI Filters Included

Allows 50 V Continuous Overload

APPLICATIONS
Current Sensing
Interface for Pressure Transducers, Position Indicators,

Strain Gages, and Other Low Level Signal Sources

PRODUCT DESCRIPTION

The AD626 is a low cost, true single supply differential ampli­fier designed for amplifying and low-pass filtering small differen­tial voltages from sources having a large common-mode voltage.

The AD626 can operate from either a single supply of +2.4 V to

+10 V, or dual supplies of ±1.2 V to ±6 V. The input common-

mode range of this amplifier is equal to 6 (+V
provides a +24 V CMR while operating from a +5 V supply.
Furthermore, the AD626 features a CMR of 90 dB typ.

= +5 V)

S

= 200 k⍀)

IN

– 1 V) which

S

Differential Amplifier

AD626

CONNECTION DIAGRAM

8-Lead Plastic Mini-DIP (N)

and SOIC (SO) Packages

The amplifier’s inputs are protected against continuous overload
of up to 50 V, and RFI filters are included in the attenuator
network. The output range is +0.03 V to +4.9 V using a +5 V
supply. The amplifier provides a preset gain of 10, but gains be­tween 10 to 100 can be easily configured with an external resis­tor. Furthermore, a gain of 100 is available by connecting the G
= 100 pin to analog ground. The AD626 also offers low-pass
filter capability by connecting a capacitor between the filter pin
and analog ground.

The AD626A and AD626B operate over the industrial tempera-

ture range of –40°C to +85°C. The AD626 is available in two

8-lead packages: a plastic mini-DIP and SOIC.

160

140

100

80

60

CMRR – dB

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.

40

20

0

0.1

Common-Mode Rejection vs. Frequency

G = 10,100
V

= +5V

S

G = 100
V

= 65V

S

G = 10
V

= 65V

S

1

FREQUENCY – Hz

1M

100k10k1k10010

Input Common-Mode Range vs. Supply

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

AD626–SPECIFICATIONS

SINGLE SUPPLY

Model AD626A AD626B
Parameter Condition Min Typ Max Min Typ Max Units

GAIN

Gain Accuracy Total Error

Gain = 10 @ V
Gain = 100 @ V

Over Temperature, T

Gain Linearity

Gain = 10 @ V
Gain = 100 @ V

OFFSET VOLTAGE

Input Offset Voltage 1.9 2.5 1.9 2.5 mV

vs. Temperature T
vs. Temperature T
vs. Supply Voltage (PSR)

+PSR 74 80 74 80 dB
–PSR 64 66 64 66 dB

COMMON-MODE REJECTION R

+CMR Gain = 10, 100 f = 100 Hz, V

±CMR Gain = 10, 100 f = 10 kHz, V

–CMR Gain = 10, 100

COMMON-MODE VOLTAGE RANGE

+CMV Gain = 10 CMR > 85 dB +24 +24 V
–CMV Gain = 10 CMR > 85 dB –2 –2 V

INPUT

Input Resistance

Differential 200 200 kΩ
Common Mode 100 100 kΩ

Input Voltage Range (Common Mode) 6 (VS – l) 6 (VS – l) V

OUTPUT

Output Voltage Swing R

Positive Gain = 10 4.7 4.90 4.7 4.90 V

Negative Gain = 10 0.03 0.03 V

Short Circuit Current

+I

SC

NOISE

Voltage Noise RTI

Gain = 10 f = 0.1 Hz–10 Hz 2 2 µV p-p
Gain = 100 f = 0.1 Hz–10 Hz 2 2 µV p-p
Gain = 10 f = 1 kHz 0.25 0.25 µV/√Hz
Gain = 100 f = 1 kHz 0.25 0.25 µV/√Hz

DYNAMIC RESPONSE

–3 dB Bandwidth V
Slew Rate, T

Settling Time to 0.01%, 1 V Step 24 22 µs

POWER SUPPLY

Operating Range T
Quiescent Current Gain = 10 0.16 0.20 0.16 0.20 mA

TRANSISTOR COUNT # of Transistors

NOTES

1

At temperatures above +25°C, –CMV degrades at the rate of 12 mV/ °C; i.e., @ +25°C CMV = –2 V, @ +85°C CMV = –1.28 V.

Specifications subject to change without notice.

MIN

(@ +VS = +5 V and TA = +25ⴗC)

= T

A

MIN–TMAX

1

to T

MAX

≥ 100 mV dc 0.4 1.0 0.2 0.6 %

OUT

≥ 100 mV dc 0.1 1.0 0.5 0.6 %

OUT

G = 10 50 30 ppm/°C
G = 100 150 120 ppm/°C

≥ 100 mV dc 0.014 0.016 0.014 0.016 %

OUT

≥ 100 mV dc 0.014 0.02 0.014 0.02 %

OUT

MIN–TMAX

MIN–TMAX

= 10 kΩ

L

, G = 10 or 100 2.9 2.9 mV

, G = 10 or 100 6 6 µV/°C

= +24 V 66 90 80 90 dB

CM

= 6 V 55 64 55 64 dB

CM

f = 100 Hz, VCM = –2 V 60 85 73 85 dB

= 10 kΩ

L

Gain = 100 4.7 4.90 4.7 4.90 V

Gain = 100 0.03 0.03 V

12 12 mA

= +1 V dc 100 100 kHz

OUT

Gain = 10 0.17 0.22 0.17 0.22 V/µs
Gain = 100 0.1 0.17 0.1 0.17 V/µs

= T

A

MIN–TMAX

2.4 5 12 2.4 5 10 V

Gain = 100 0.23 0.29 0.23 0.29 mA

46 46

–2–

REV. C

DUAL SUPPLY

Model AD626A AD626B
Parameter Condition Min Typ Max Min Typ Max Units

GAIN

Gain Accuracy Total Error

Gain = 10 R
Gain = 100 0.25 1.0 0.15 0.6 %

Over Temperature, T

Gain Linearity

Gain = 10 0.045 0.055 0.045 0.055 %
Gain = 100 0.01 0.015 0.01 0.015 %

OFFSET VOLTAGE

Input Offset Voltage 50 500 50 250 µV

vs. Temperature T
vs. Temperature T
vs. Supply Voltage (PSR)

+PSR 74 80 74 80 dB
–PSR 64 66 64 66 dB

COMMON-MODE REJECTION R

±CMR Gain = 10, 100 f = 100 Hz, V
±CMR Gain = 10, 100 f = 10 kHz, V

COMMON-MODE VOLTAGE RANGE

+CMV Gain = 10 CMR > 85 dB 26.5 26.5 V
–CMV Gain = 10 CMR > 85 dB 32.5 32.5 V

INPUT

Input Resistance

Differential 200 200 kΩ
Common Mode 110 110 kΩ

Input Voltage Range (Common Mode) 6 (VS – 1) 6 (VS – 1) V

OUTPUT

Output Voltage Swing R

Positive Gain = 10, 100 4.7 4.90 4.7 4.90 V
Negative Gain = 10 1.65 2.1 1.65 2.1 V

Short Circuit Current

+I

SC

–I

SC

NOISE

Voltage Noise RTI

Gain = 10 f = 0.1 Hz–10 Hz 2 2 µV p-p
Gain = 100 f = 0.1 Hz–10 Hz 2 2 µV p-p
Gain = 10 f = 1 kHz 0.25 0.25 µV/√Hz
Gain = 100 f = 1 kHz 0.25 0.25 µV/√Hz

DYNAMIC RESPONSE

–3 dB Bandwidth V
Slew Rate, T

Settling Time to 0.01%, 1 V Step 24 22 µs

POWER SUPPLY

Operating Range T
Quiescent Current Gain = 10 1.5 2 1.5 2 mA

TRANSISTOR COUNT # of Transistors

Specifications subject to change without notice.

(@ +VS = ⴞ5 V and TA = +25ⴗC)

= T

A

MIN–TMAX

to T

MIN

MAX

= 10 kΩ 0.2 0.5 0.1 0.3 %

L

G = 10 50 30 ppm/°C
G = 100 100 80 ppm/°C

MIN–TMAX

MIN–TMAX

= 10 kΩ

L

= 10 kΩ

L

, G = 10 or 100 1.0 0.5 mV

, G = 10 or 100 1.0 0.5 µV/°C

= +24 V 66 90 80 90 dB

CM

= 6 V 55 60 55 60 dB

CM

Gain = 100 1.45 1.8 1.45 1.8 V

12 12 mA

0.5 0.5 mA

= +1 V dc 100 100 kHz

OUT

Gain = 10 0.17 0.22 0.17 0.22 V/µs
Gain = 100 0.1 0.17 0.1 0.17 V/µs

= T

A

MIN–TMAX

±1.2 ±5 ±6 ±1.2 ±5 ±6V

Gain = 100 1.5 2 1.5 2 mA

46 46

AD626

REV. C –3–

AD626

ABSOLUTE MAXIMUM RATINGS

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+36 V

Internal Power Dissipation

2

1

Peak Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 V

Maximum Reversed Supply Voltage Limit . . . . . . . . . . . . –34 V

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

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

Operating Temperature Range

AD626A/B . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C

Lead Temperature Range (Soldering 60 sec) . . . . . . . . +300°C

ORDERING GUIDE

Temperature Package Package

Model Range Descriptions Options

AD626AN –40°C to +85°C Plastic DIP N-8
AD626AR – 40°C to +85°C Small Outline IC SO-8
AD626BN –40°C to +85°C Plastic DIP N-8
AD626AR-REEL –40°C to +85°C 13" Tape and Reel
AD626AR-REEL7 –40°C to +85°C 7" Tape and Reel

NOTES

1

Stresses above those listed under Absolute Maximum Ratings may cause permanent

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

8-Lead Plastic Package: θJA = 100°C/W, θJC = 50°C/W.
8-Lead SOIC Package: θJA = 155°C/W, θJC = 40°C/W.

ESD SUSCEPTIBILITY

An ESD classification per method 3015.6 of MIL STD 883C
has been performed on the AD626, which is a Class 1 device.

METALIZATION PHOTOGRAPH

Dimensions shown in inches and (mm).

REV. C–4–