AD22001 datasheet(2/8 Pages) AD

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Parameter

Test Conditions

Min

Typ

Max

Units

DIFFERENTIAL INPUTS (Voltage Drop from Shunt Resistor: Pins 4 & 5, 8 & 9, 10 & 11, 14 & 15, 16 & 17)

VINDIFF

Comparator Threshold Voltage

1.5

1.75

2.0

VINCM

Common-Mode Threshold Voltage

Power Supply Sensitivity of VINDIFF

9 V

≤ V

S ≤ 16 V

Temperature Compensation of VINDIFF

3770

ppm/

°C

IINB

Input Bias Current

µA

IINC

Constant Current Source

µA

SINGLE-ENDED INPUTS (Fuse Monitoring: Pins 6, 19)

VINF

Fuse Input Threshold Voltage

CHIP ENABLE CONTROL INPUT (Pin 1)

VINCE

Chip Enable, Input High

VINCD

Chip Disable (Stop Operation)

OUTPUTS (Pins 7, 12, 13, 18)

VOUTL

Output Voltage, Low

Load = 500

µA

0.6

Indicates No Fault in Lamp Circuit

VOUTH

Output Voltage, High

9 V

≤ V

S ≤ VSSDH

VOUTPS–2.5

VOUTPS V

Indicates Fault in Lamp Circuit

Load = 50

µA

POWER SUPPLY (Pin 2: +VS, Pin 20: GND)

Supply Voltage

930

Quiescent Supply Current

Pin 1 High

VOUTH: No Load

Pin 1 Low

100

µA

POWER SUPPLY OUTPUT (Pin 3)

VOUTPS

Power Supply Output Voltage

10 V < VS < 14.5 V VS–0.5

VS–0.3

IOUTPS

≤ 1 mA

Max Output Voltage

IOUTPS

Power Supply Output Current

2mA

OPERATING SHUTDOWN (Safety Features)

VSSDH

Operation Shutdown at High

Power Supply Voltages

VSSDL

Operation Shutdown at Low

Power Supply Voltage

TEMPERATURE RANGE

Operating Temperature Range

–40

+125

°C

PACKAGE

Plastic DIP (N-20)

AD22001N

NOTES

1In the presence of a common-mode voltage greater than 5 V, if the shunt voltage applied to the comparator does not exceed the threshold (i.e., the bulb is switched

on but does not draw current), then the device will indicate a failure.

2At V

S = 13.5 V, the differential input threshold voltage is typically 1.75 mV. With an increase of V S, the threshold voltage, VINDIFF, will change as well.

Power supply sensitivity of 50% means that when the power supply voltage V S increases by 10%, the threshold voltage VINDIFF will be increased by half of this per-

centage value: 5%.

3This is the temperature coefficient to compensate for any temperature influence on the external copper PCB track shunt resistors. 3770 ppm/

°C is equal to 6.6 µV/°C.

4This current source is used to test the lamp when it is switched off (cold lamp test).

5If the voltage at the input from the fuse (Pin 6 or 19) does not exceed the threshold voltage, then the output will indicate a failure.

6When the Chip Enable is open-circuited, the chip is disabled.

7Shorting V

OUTPS to ground will cause the device to stop operating for that period. However, the device will not suffer any damage.

8At this voltage, or above, the internal power supply and the power output V

OUTPS will be shut off.

9Below the minimum voltage, the circuit will shut down. Above the maximum, the circuit will be on if enabled.

All min and max specifications are guaranteed, although only those marked in boldface are tested on all production units at final test.

Specifications subject to change without notice.

REV. A

–2–

AD22001–SPECIFICATIONS

(TA = +22 C, VS = +13.5 V unless otherwise noted)

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