AD8214

Rev. 0 | Page 13 of 16

HIGH SIDE OVERCURRENT DETECTION

The AD8214 is useful for many automotive applications using the

load configuration shown in Figure 31. Because the part powers

directly from the battery voltage, the shunt resistor must be on

the high side. The AD8214 monitors the current in the path as

long as the battery voltage is between 5 V and 65 V. If the current

reaches an undesirable level that corresponds to the user-selected

threshold, the output of the AD8214 switches states in less than

100 ns. The microcontroller, analog-to-digital converter, or FET

driver can be directly notified of this condition.

CLAMP

DIODE

BATTERY

UP TO 65V

SHUNT

SWITCH

OVERCURRENT

DETECTION (<100ns)

AD8214

R1

R2

C1

–IN

1

8

+IN

2

3

NC

4

I

Figure 31. High Side Overcurrent Protection