AD22001–SPECIFICATIONS (TA = +22؇C, VS = +13.5 V unless otherwise noted)
Test Conditions Min
Typ Max Units
DIFFERENTIAL INPUTS (Voltage Drop from Shunt Resistor: Pins 4 & 5, 8 & 9, 10 & 11, 14 & 15, 16 & 17)
Comparator Threshold Voltage1
Common-Mode Threshold Voltage1
Power Supply Sensitivity of VINDIFF2
Temperature Compensation of VINDIFF3
9 V ≤ VS ≤ 16 V
IINB Input Bias Current
IINC Constant Current Source4
SINGLE-ENDED INPUTS (Fuse Monitoring: Pins 6, 19)
VINF Fuse Input Threshold Voltage5
CHIP ENABLE CONTROL INPUT (Pin 1)
Chip Enable, Input High
Chip Disable (Stop Operation)6
OUTPUTS (Pins 7, 12, 13, 18)
Output Voltage, Low
Indicates No Fault in Lamp Circuit
Output Voltage, High
Indicates Fault in Lamp Circuit
Load = 500 µA
9 V ≤ VS ≤ VSSDH
Load = 50 µA
POWER SUPPLY (Pin 2: +VS, Pin 20: GND)
VS Supply Voltage
IS Quiescent Supply Current
VOUTH: No Load
POWER SUPPLY OUTPUT (Pin 3)
Power Supply Output Voltage
Max Output Voltage
Power Supply Output Current7
OPERATING SHUTDOWN (Safety Features)
Operation Shutdown at High
Power Supply Voltages8
Operation Shutdown at Low
Power Supply Voltage9
Pin 1 High
Pin 1 Low
10 V < VS < 14.5 V VS–0.5
IOUTPS ≤ 1 mA
TA Operating Temperature Range
Plastic DIP (N-20)
–40 +125 °C
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 VS = 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 VOUTPS 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.
–2– REV. A