AD629AR Analog Devices Inc, AD629AR Datasheet

IC AMP DIFF 25MA LDRIFT 8SOIC

AD629AR

Manufacturer Part Number
AD629AR
Description
IC AMP DIFF 25MA LDRIFT 8SOIC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD629AR

Slew Rate
2.1 V/µs
Rohs Status
RoHS non-compliant
Design Resources
Measuring -48 V High-Side Current Using AD629, AD8603, AD780, and AD7453 (CN0100)
Amplifier Type
Differential
Number Of Circuits
1
-3db Bandwidth
500kHz
Voltage - Input Offset
200µV
Current - Supply
900µA
Current - Output / Channel
25mA
Voltage - Supply, Single/dual (±)
5 V ~ 36 V, ±2.5 V ~ 18 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
No. Of Amplifiers
1
Bandwidth
500kHz
No. Of Pins
8
Amplifier Output
Single Ended
Supply Voltage Min
2.5V
Gain Min, V/v
1
Peak Reflow Compatible (260 C)
No
Output Type
-
Gain Bandwidth Product
-
Current - Input Bias
-
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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FEATURES
Improved replacement for: INA117P and INA117KU
±270 V common-mode voltage range
Input protection to
Wide power supply range (±2.5 V to ±18 V)
±10 V output swing on ±12 V supply
1 mA maximum power supply current
HIGH ACCURACY DC PERFORMANCE
3 ppm maximum gain nonlinearity (AD629B)
20 μV/°C maximum offset drift (AD629A)
10 μV/°C maximum offset drift (AD629B)
10 ppm/°C maximum gain drift
EXCELLENT AC SPECIFICATIONS
77 dB minimum CMRR @ 500 Hz (AD629A)
86 dB minimum CMRR @ 500 Hz (AD629B)
500 kHz bandwidth
APPLICATIONS
High voltage current sensing
Battery cell voltage monitors
Power supply current monitors
Motor controls
Isolation
Rev. B
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.
±500 V common mode
±500 V differential mode
100
95
90
85
80
75
70
65
60
55
50
Figure 2. Common-Mode Rejection Ratio vs. Frequency
20
100
FREQUENCY (Hz)
1k
10k
20k
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
GENERAL DESCRIPTION
The AD629 is a difference amplifier with a very high input,
common-mode voltage range. It is a precision device that allows
the user to accurately measure differential signals in the
presence of high common-mode voltages up to ±270 V.
The AD629 can replace costly isolation amplifiers in
applications that do not require galvanic isolation. The device
operates over a ±270 V common-mode voltage range and has
inputs that are protected from common-mode or differential
mode transients up to ±500 V.
The AD629 has low offset, low offset drift, low gain error drift,
low common-mode rejection drift, and excellent CMRR over a
wide frequency range.
The AD629 is available in low cost, 8-lead PDIP and 8-lead
SOIC packages. For all packages and grades, performance is
guaranteed over the industrial temperature range of −40°C to
+85°C.
High Common-Mode Voltage,
Figure 3. Error Voltage vs. Input Common-Mode Voltage
FUNCTIONAL BLOCK DIAGRAM
–240
REF(–)
2mV/DIV
–V
+IN
–IN
S
©1999-2007 Analog Devices, Inc. All rights reserved.
Difference Amplifier
1
2
3
4
COMMON-MODE VOLTAGE (V)
–120
21.1kΩ
AD629
380kΩ
380kΩ
NC = NO CONNECT
Figure 1.
380kΩ
0
20kΩ
120
8
7
6
5
NC
+V
OUTPUT
REF(+)
60V/DIV
S
www.analog.com
AD629
240

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AD629AR Summary of contents

Page 1

FEATURES Improved replacement for: INA117P and INA117KU ±270 V common-mode voltage range Input protection to ±500 V common mode ±500 V differential mode Wide power supply range (±2 ±18 V) ±10 V output swing on ±12 V supply ...

Page 2

AD629 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 ESD Caution.................................................................................. 4 Typical Performance Characteristics ............................................. 5 Theory of Operation ........................................................................ ...

Page 3

SPECIFICATIONS T = 25° ±15 V, unless otherwise noted Table 1. Parameter Condition GAIN V Nominal Gain Gain Error Gain Nonlinearity R Gain vs. Temperature T OFFSET VOLTAGE Offset Voltage V vs. Temperature T vs. Supply ...

Page 4

AD629 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage Internal Power Dissipation 8-Lead PDIP (N) 8-Lead SOIC (R) Input Voltage Range, Continuous Common-Mode and Differential, 10 sec Output Short-Circuit Duration Pin 1 and Pin 5 Maximum Junction ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS T = 25° ±15 V, unless otherwise noted 100 100 1k 10k 100k FREQUENCY (Hz) Figure 5. Common-Mode Rejection Ratio vs. Frequency 2mV/DIV ...

Page 6

AD629 20µV/DIV –10 – (V) OUT Figure 11. Gain Nonlinearity ± 20µV/DIV –10 –8 –6 –4 – (V) OUT Figure 12. Gain Nonlinearity ± 40µV/DIV ...

Page 7

V = ±5V S –2.0 –2.5 –40°C –3.0 –3.5 +85°C +25°C –4 OUTPUT CURRENT (mA) Figure 17. Output Voltage Operating Range vs. Output Current; V ...

Page 8

AD629 5V/DIV +10V V OUT 0V OUTPUT ERROR 1mV/DIV Figure 23. Settling Time to 0.01%, for Output Step −1, R 350 N = 2180 300 n ≈ 200 PCS. FROM 10 ASSEMBLY LOTS ...

Page 9

THEORY OF OPERATION The AD629 is a unity gain, differential-to-single-ended amplifier (diff amp) that can reject extremely high common- mode signals (in excess of 270 V with 15 V supplies). It consists of an operational amplifier (op amp) and a ...

Page 10

AD629 APPLICATIONS BASIC CONNECTIONS Figure 30 shows the basic connections for operating the AD629 with a dual supply. A supply voltage of between ±3 V and ± applied between Pin 7 and Pin 4. Both supplies should be ...

Page 11

ANALOG POWER SUPPLY –5V +5V GND 0.1µF 0.1µF 0.1µ AGND DD – +IN 3 AD629 V AD7892-2 OUTPUT 6 4 IN1 –IN 2 REF(–) REF(+) V 3 IN2 1 5 Figure 32. ...

Page 12

AD629 OUTPUT CURRENT AND BUFFERING The AD629 is designed to drive loads of 2 kΩ to within the rails but can deliver higher output currents at lower output voltages (see Figure 15). If higher output current is ...

Page 13

ERROR BUDGET ANALYSIS EXAMPLE 2 This application is similar to the previous example except that the sensed load current is from an amplifier with an ac common-mode component of ±100 V (frequency = 500 Hz) present on the shunt (see ...

Page 14

AD629 OUTLINE DIMENSIONS 0.210 (5.33) MAX 0.150 (3.81) 0.130 (3.30) 0.115 (2.92) 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE ...

Page 15

... AD629AR –40°C to +85°C AD629AR-REEL –40°C to +85°C AD629AR-REEL7 –40°C to +85°C 1 AD629ARZ –40°C to +85°C 1 AD629ARZ-RL –40°C to +85°C AD629ARZ-R7 1 –40°C to +85°C AD629BN –40°C to +85°C 1 AD629BNZ –40°C to +85°C AD629BR – ...

Page 16

AD629 NOTES ©1999-2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D00783-0-2/07(B) Rev Page ...

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