AD8210 Analog Devices, AD8210 Datasheet

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AD8210

Manufacturer Part Number
AD8210
Description
High Voltage, Bidirectional Current Shunt Monitor
Manufacturer
Analog Devices
Datasheet

Specifications of AD8210

Filter Option
No
Common Mode Input (v)min
--2V
Common Mode Input (v)max
+65V
Bandwidth G=10 (khz Typ)
500kHz
Cmrr (db)
100dB
Vcc-vee
4.5V to 5.5V

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Data Sheet
FEATURES
±4000 V HBM ESD
High common-mode voltage range
Buffered output voltage
5 mA output drive capability
Wide operating temperature range: −40°C to +125°C
Ratiometric half-scale output offset
Excellent ac and dc performance
Available in 8-lead SOIC
APPLICATIONS
Current sensing
GENERAL DESCRIPTION
The AD8210 is a single-supply, difference amplifier ideal for
amplifying small differential voltages in the presence of large
common-mode voltages. The operating input common-mode
voltage range extends from −2 V to +65 V. The typical supply
voltage is 5 V.
The AD8210 is offered in a SOIC package. The operating
temperature range is −40°C to +125°C.
Excellent ac and dc performance over temperature keep errors
in the measurement loop to a minimum. Offset drift and gain
drift are guaranteed to a maximum of 8 µV/°C and 20 ppm/°C,
respectively.
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.
−2 V to +65 V operating
−5 V to +68 V survival
1 µV/°C typical offset drift
10 ppm/°C typical gain drift
120 dB typical CMRR at dc
80 dB typical CMRR at 100 kHz
Motor controls
Transmission controls
Diesel injection controls
Engine management
Suspension controls
Vehicle dynamic controls
DC-to-dc converters
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The output offset can be adjusted from 0.05 V to 4.9 V with
a 5 V supply by using the V
V
the GND pin, the output is set at half scale. Attaching both V
and V
near ground. Attaching both V
output to be unipolar, starting near V+. Other offsets can be
obtained by applying an external voltage to V
REF
V
SUPPLY
1 pin attached to the V+ pin and the V
REF
High Voltage, Bidirectional
2 to GND causes the output to be unipolar, starting
FUNCTIONAL BLOCK DIAGRAM
Current Shunt Monitor
©2006–2012 Analog Devices, Inc. All rights reserved.
+IN
GND
I
R
S
S
REF
–IN
Figure 1.
1 pin and the V
REF
1 and V
AD8210
G = +20
V
V
REF
REF
REF
1
2
REF
V
2 to V+ causes the
S
REF
2 pin attached to
REF
AD8210
www.analog.com
2 pin. With the
1 and V
V+
LOAD
VOUT
REF
REF
2.
1

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AD8210 Summary of contents

Page 1

... The operating input common-mode voltage range extends from − +65 V. The typical supply voltage The AD8210 is offered in a SOIC package. The operating temperature range is −40°C to +125°C. Excellent ac and dc performance over temperature keep errors in the measurement loop to a minimum. Offset drift and gain drift are guaranteed to a maximum of 8 µ ...

Page 2

... AD8210 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 Pin Configuration and Function Descriptions ............................. 5 Typical Performance Characteristics ............................................. 6 Theory of Operation ...................................................................... 10 REVISION HISTORY 2/12—Rev Rev. C Changes to Ordering Guide .......................................................... 15 5/09—Rev Rev. B Changes to Ordering Guide .......................................................... 15 4/07— ...

Page 3

... Differential input voltage range = ±125 mV with half-scale output offset. Source imbalance < 2 Ω The offset adjustment is ratiometric to the power supply when V 5 When the input common mode is less than 5 V, the supply current increases. This can be calculated with the following formula: I AD8210 SOIC 1 Min Typ Max Unit 20 V/V ± ...

Page 4

... AD8210 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage Continuous Input Voltage ( Reverse Supply Voltage ESD Rating HBM (Human Body Model) CDM (Charged Device Model) Operating Temperature Range Storage Temperature Range Output Short-Circuit Duration Stresses above those listed under Absolute Maximum Ratings Rating may cause permanent damage to the device ...

Page 5

... Table 3. Pin Function Descriptions Pin No. Mnemonic 1 −IN 2 GND REF OUT REF 8 +IN + REF V+ OUT X Y −443 +584 −479 +428 −466 −469 +466 −537 +501 −95 +475 +477 +443 +584 Rev Page AD8210 Figure 3. Metallization Diagram ...

Page 6

... AD8210 TYPICAL PERFORMANCE CHARACTERISTICS 200 180 160 140 120 100 –20 –40 –60 –80 –100 –120 –140 –160 –180 –200 –40 – –30 – TEMPERATURE (°C) Figure 4. Typical Offset Drift 140 130 120 110 +125°C ...

Page 7

... Figure 11. Differential Overload Recovery (Falling) 200mV/DIV 2V/DIV 1µs/DIV Figure 12. Differential Overload Recovery (Rising) 4V/DIV 0.02%/DIV Figure 13. Settling Time (Falling) 4V/DIV 0.02%/DIV Figure 14. Settling Time (Rising) 50V/DIV 100mV/DIV Figure 15. Common-Mode Response (Falling) Rev Page AD8210 4µs/DIV 4µs/DIV 1µs/DIV ...

Page 8

... AD8210 50V/DIV 100mV/DIV 1µs/DIV Figure 16. Common-Mode Response (Rising –40 – TEMPERATURE (°C) Figure 17. Output Sink Current vs. Temperature –40 – TEMPERATURE (°C) Figure 18. Output Source Current vs. Temperature ...

Page 9

... Rev Page –2.0 –1.5 –1.0 –0.5 0 0.5 1.0 V (mV) OS Figure 24. Offset Distribution (µV), SOIC, VCM = 5 V 500 0 –2.0 –1.5 –1.0 –0.5 0 0.5 1.0 V (mV) OS Figure 25. Offset Distribution (µV), SOIC, VCM = 0 V AD8210 +125°C +25°C –40°C 1.5 2.0 +125°C +25°C –40°C 1.5 2.0 ...

Page 10

... R1 and R2 with Q1 and Q2. When the input signal to the AD8210 the currents in R1 and R2 are equal. When the differential signal is nonzero, the current increases through one of the resistors and decreases in the other ...

Page 11

... Table 6). Ground Referenced Output When using the AD8210 in this mode, both reference inputs are tied to ground, which causes the output to sit at the negative rail when the differential input voltage is zero (see Figure 27 and Table 4) ...

Page 12

... For proper operation, the AD8210 output offset should not be set with a resistor voltage divider. Any additional external resistance could create a gain error. A low impedance voltage source should be used to set the output offset of the AD8210. 0.1µF V REF 0V ≤ ...

Page 13

... Data Sheet INPUT FILTERING In typical applications, such as motor and solenoid current sensing, filtering at the input of the AD8210 can be beneficial in reducing differential noise, as well as transients and current ripples flowing through the input shunt resistor. An input low- pass filter can be implemented as shown in Figure 32. ...

Page 14

... H-BRIDGE MOTOR CONTROL 0.1µF Another typical application for the AD8210 is as part of the control loop in H-bridge motor control. In this case, the AD8210 OUT ...

Page 15

... AD8210YRZ −40°C to +125°C AD8210YRZ-REEL −40°C to +125°C AD8210YRZ-REEL7 −40°C to +125°C AD8210WYRZ −40°C to +125°C AD8210WYRZ-RL −40°C to +125°C AD8210WYRZ-R7 −40°C to +125°C AD8210WYC-P3 −40°C to +125° RoHS Compliant Part. 5.00 (0.1968) 4.80 (0.1890 ...

Page 16

... AD8210 NOTES ©2006–2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05147-0-2/12(C) Rev Page Data Sheet ...

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