Fast Response, High Voltage Current Shunt Comparator Data Sheet AD8214 FEATURES FUNCTIONAL BLOCK DIAGRAM V 1 Input-to-output response: <100 ns S High input common-mode voltage range Operating: 5 V to 65 V 2 +IN Survival: 0 V to 68 V 5 OUT IN 8 Current output 2.4V Hysteresis: 10 mV REGULATOR Integrated 2.4 V regulator Wide operating temperature range: 40C to +125C V 3 REG 8-lead MSOP package Qualified for automotive applications 6 GND APPLICATIONS Figure 1. Overcurrent protection Motor controls Transmission controls Diesel injection controls DC-to-DC converters Power supplies Batteries GENERAL DESCRIPTION The AD8214 is a fast response, high common-mode voltage, The input to output response time of the AD8214 is typically current shunt comparator. The device operates on the high side less than 100 ns. This makes the device optimal for overcurrent rail of any DC current sensing application, provided the voltage protection in applications such as motor and solenoid control. is between 5 V and 65 V. Internally, the AD8214 features a fast Built-in comparator hysteresis means that once the current comparator that is optimized for high side operation. An internal across the shunt falls back to a normal limit, the AD8214 output Zener regulator powers the circuit with respect to the high side will change states to its original level. DC rail. In addition, user access to this 2.4V regulator, allows The AD8214 is available in an 8-lead MSOP package. The for setting a comparator threshold voltage via external resistors. operating temperature range is 40C to +125C, and the device The AD8214 will compare the voltage across the shunt resistor is fully qualified for automotive applications. to this user-selected threshold, and the AD8214 output will change states from low to high, indicating the current across the shunt has crossed the threshold level. Rev. A 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com 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. 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All rights reserved. 06193-001AD8214 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Comparator Offset and Hysteresis ........................................... 11 Applications ....................................................................................... 1 Setting the Input Threshold Voltage ........................................ 11 Functional Block Diagram .............................................................. 1 Input-Referred Dynamic Error ................................................ 11 General Description ......................................................................... 1 Applications ..................................................................................... 12 Revision History ............................................................................... 2 Typical Setup and Calculations ................................................ 12 Specifications ..................................................................................... 3 High Side Overcurrent Detection ............................................ 13 Absolute Maximum Ratings ............................................................ 4 Outline Dimensions ....................................................................... 14 ESD Caution .................................................................................. 4 Ordering Guide .......................................................................... 14 Pin Configuration and Function Descriptions ............................. 5 Automotive Products ................................................................. 14 Typical Performance Characteristics ............................................. 6 Theory of Operation ...................................................................... 10 REVISION HISTORY 6/12Rev. 0 to Rev. A 10/06Revision 0: Initial Version Changes to Product Title .................................................................. 1 Changes to Features Section, and General Description Section ................................................................................................. 1 Changes to Table 1 ............................................................................. 3 Changes to Table 2 ............................................................................. 4 Changes to Ordering Guide Added Automotive Products Section ............................................................................................... 14 Updated Outline Dimensions ........................................................ 14 Rev. A Page 2 of 16