AD8212YRMZ Analog Devices Inc, AD8212YRMZ Datasheet

IC CURRENT MONITOR 8MSOP

AD8212YRMZ

Manufacturer Part Number
AD8212YRMZ
Description
IC CURRENT MONITOR 8MSOP
Manufacturer
Analog Devices Inc
Type
Current Shunt Monr
Datasheet

Specifications of AD8212YRMZ

Function
Current Monitor
Sensing Method
High-Side
Voltage - Input
7 ~ 65 V
Current - Output
500µA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Number Of Channels
1
Number Of Elements
1
Power Supply Requirement
Single
Input Resistance
5@15VMohm
Input Offset Voltage
2@15VmV
Input Bias Current
1000@15V@-40 TO 125CnA
Single Supply Voltage (typ)
9/12/15/18/24/28V
Dual Supply Voltage (typ)
Not RequiredV
Power Supply Rejection Ratio
80dB
Rail/rail I/o Type
No
Single Supply Voltage (min)
7V
Single Supply Voltage (max)
65V
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Operating Temp Range
-40C to 125C
Operating Temperature Classification
Automotive
Mounting
Surface Mount
Pin Count
8
Package Type
MSOP
No. Of Amplifiers
1
Output Current Per Channel
500µA
Gain Db Max
50dB
Bandwidth
1MHz
Cmrr
100dB
Supply Voltage Range
7V To 65V
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Accuracy
-
Lead Free Status / Rohs Status
Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD8212YRMZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
FEATURES
Adjustable gain
High common-mode voltage range
Current output
Integrated 5 V series regulator
8-lead MSOP package
Operating temperature range of −40°C to +125°C
APPLICATIONS
Current shunt measurement
Motor controls
DC-to-DC converters
Power supplies
Battery monitoring
Remote sensing
GENERAL DESCRIPTION
The AD8212 is a high common-mode voltage, current shunt
monitor. It accurately amplifies a small differential input voltage
in the presence of large common-mode voltages up to 65 V
(>500 V with an external PNP transistor).
The AD8212 is ideal for current monitoring across a shunt
resistor in applications controlling loads, such as motors and
solenoids. The current output of the device is proportional to
the input differential voltage. The user can select an external
resistor to set the desired gain. The typical common-mode
voltage range of the AD8212 is 7 V to 65 V.
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.
7 V to 65 V typical
7 V to >500 V with external pass transistor
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Another feature of the AD8212 is high voltage operation,
which is achieved by using an external high voltage breakdown
PNP transistor. In this configuration, the common-mode range
of the AD8212 is equal to the breakdown of the external PNP
transistor. Therefore, operation at several hundred volts is easily
achieved (see Figure 23).
The AD8212 features a patented output base current compensa-
tion circuit for high voltage operation mode. This ensures that
no base current is lost through the external transistor and
excellent output accuracy is maintained regardless of common-
mode voltage or temperature.
FUNCTIONAL BLOCK DIAGRAM
I
V+
OUT
1
5
Current Shunt Monitor
©2007–2009 Analog Devices, Inc. All rights reserved.
COM
2
CIRCUIT
BIAS
AD8212
Figure 1.
BIAS
3
COMPENSATION
High Voltage
CURRENT
OUTPUT
ALPHA
V
SENSE
8
6
AD8212
www.analog.com

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AD8212YRMZ Summary of contents

Page 1

FEATURES Adjustable gain High common-mode voltage range typical >500 V with external pass transistor Current output Integrated 5 V series regulator 8-lead MSOP package Operating temperature range of −40°C to +125°C APPLICATIONS ...

Page 2

AD8212 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 ...

Page 3

SPECIFICATIONS −40°C to +125° 25°C, unless otherwise noted. S OPR A Table 1. Parameter SUPPLY VOLTAGE (V+) 2 SUPPLY CURRENT VOLTAGE OFFSET Offset Voltage (RTI) Over Temperature (RTI) Offset Drift INPUT Input ...

Page 4

AD8212 ABSOLUTE MAXIMUM RATINGS T = −40°C to +125°C, unless otherwise noted. OPR Table 2. Parameter Supply Voltage Continuous Input Voltage Reverse Supply Voltage Operating Temperature Range Storage Temperature Range Output Short-Circuit Duration Stresses above those listed under Absolute Maximum ...

Page 5

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS AD8212 COM BIAS ALPHA 3 TOP VIEW 6 (Not to Scale CONNECT Figure 2. Pin Configuration Table 3. Pin Function Descriptions ...

Page 6

AD8212 TYPICAL PERFORMANCE CHARACTERISTICS 195 190 T = +125°C 185 180 T = +25°C 175 170 165 160 SUPPLY VOLTAGE (V) Figure 4. Supply Current vs. Supply (Pin V+) (I 5.2 5.1 ...

Page 7

+20 0 +50 0. DIFFERENTIAL INPUT VOLTAGE (mV) Figure 10. Total Output Error Due to Input Offset vs. Differential Input Voltage ...

Page 8

AD8212 V IN 100mV/DIV V OUT 2V/DIV 0V 5µs/DIV Figure 16. Step Response (Gain = 50 100mV/DIV V OUT 2V/DIV 2µs/DIV Figure 17. Step Response Falling V IN 100mV/DIV V OUT 2V/DIV 0V 2µs/DIV Figure 18. Step Response ...

Page 9

THEORY OF OPERATION NORMAL OPERATION ( SUPPLY (V+) RANGE) In typical applications, the AD8212 measures a small differential input voltage generated by a load current flowing through a shunt resistor. The operational amplifier (A1) is connected ...

Page 10

AD8212 HIGH VOLTAGE OPERATION USING AN EXTERNAL PNP TRANSISTOR The AD8212 offers features that simplify measuring current in the presence of common-mode voltages greater than 65 V. This is achieved by connecting an external PNP transistor at the output of ...

Page 11

APPLICATIONS INFORMATION GENERAL HIGH-SIDE CURRENT SENSING The AD8212 output is intended to drive high impedance nodes. Therefore, if interfacing with a converter recommended that the output voltage across R be buffered, so that the gain OUT of the ...

Page 12

AD8212 BIDIRECTIONAL CURRENT SENSING The AD8212 is a unidirectional current sensing device. Therefore, in power management applications where both the charge and load currents must be monitored, two devices can be used and connected as shown in Figure 27. In ...

Page 13

... OUTLINE DIMENSIONS ORDERING GUIDE Model Temperature Range 1 AD8212YRMZ −40°C to +125°C 1 AD8212YRMZ-RL −40°C to +125°C 1 AD8212YRMZ-R7 −40°C to +125°C AD8212WYRMZ 1 −40°C to +125°C 1 AD8212WYRMZ-RL −40°C to +125°C AD8212WYRMZ-R7 1 −40°C to +125° RoHS Compliant Part. 3.20 3 ...

Page 14

AD8212 NOTES Rev Page ...

Page 15

NOTES Rev Page AD8212 ...

Page 16

AD8212 NOTES ©2007–2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05942-0-5/09(B) Rev Page ...

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