High Voltage

Threshold Detector

AD8214

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other

rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

Fax: 781.461.3113

©2006 Analog Devices, Inc. All rights reserved.

FEATURES

Input-to-output response: <100 ns

High input common-mode voltage range

Operating: 5 V to 65 V

Survival: 0 V to 68 V

Current output

Hysteresis: 10 mV

Integrated 2.4 V regulator

Wide operating temperature range: –40°C to +125°C

8-lead MSOP package

APPLICATIONS

Overcurrent protection

Motor controls

Transmission controls

Diesel injection controls

DC-to-DC converters

Power supplies

Batteries

FUNCTIONAL BLOCK DIAGRAM

2.4V

REGULATOR

1

3

6

5

8

2

+IN

–IN

OUT

GND

Figure 1.

GENERAL DESCRIPTION

The AD8214 is a fast, high common-mode voltage threshold

detector, which operates with a single supply of 5 V to 65 V.

Internally the AD8214 features a fast comparator that is

optimized for high side operation. It also includes a stable

2.4 V series regulator, which is referenced with respect to the

supply voltage. The purpose of the regulator is to provide

power to the internal electronics, and set an input comparison

threshold below the supply voltage. The inputs of the AD8214

may be operated at, slightly above, or below the power supply.

The differential voltage range between the inputs of the

AD8214 is 500 mV.

The device features a current output. This current is <100 nA

when –IN > +IN and 1 mA when +IN > –IN. The input

voltages are referenced to the supply voltage, as is the

internal 2.4 V regulator. The input-to-output response time

is typically <100 ns.

As the output switches from low to high, a small hysteresis

(10 mV) is activated to minimize the effects of noise in the

system, and prevent any false state conditions.

The AD8214 is available in an 8-lead MSOP package. The

operating temperature range is –40°C to +125°C, making it

ideal for industrial, consumer, and automotive applications.