Fast Response, High Voltage

Current Shunt Comparator

Data Sheet

AD8214

Rev. A

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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

Qualified for automotive applications

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 response, high common-mode voltage,

current shunt comparator. The device operates on the high side

rail of any DC current sensing application, provided the voltage

is between 5 V and 65 V. Internally, the AD8214 features a fast

comparator that is optimized for high side operation. An internal

Zener regulator powers the circuit with respect to the high side

DC rail. In addition, user access to this 2.4V regulator, allows

for setting a comparator threshold voltage via external resistors.

The AD8214 will compare the voltage across the shunt resistor

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.

The input to output response time of the AD8214 is typically

less than 100 ns. This makes the device optimal for overcurrent

protection in applications such as motor and solenoid control.

Built-in comparator hysteresis means that once the current

across the shunt falls back to a normal limit, the AD8214 output

will change states to its original level.

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

operating temperature range is −40°C to +125°C, and the device

is fully qualified for automotive applications.