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AD22001 Datasheet(PDF) 2 Page - Analog Devices |
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AD22001 Datasheet(HTML) 2 Page - Analog Devices |
2 / 8 page 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 1.5 1.75 2.0 mV VINCM Common-Mode Threshold Voltage 1 5 V Power Supply Sensitivity of VINDIFF 2 9 V ≤ V S ≤ 16 V 50 % Temperature Compensation of VINDIFF 3 3770 ppm/ °C IINB Input Bias Current 10 µA IINC Constant Current Source 4 30 60 µA SINGLE-ENDED INPUTS (Fuse Monitoring: Pins 6, 19) VINF Fuse Input Threshold Voltage 5 4 V CHIP ENABLE CONTROL INPUT (Pin 1) VINCE Chip Enable, Input High 9 V VINCD Chip Disable (Stop Operation) 6 6 V OUTPUTS (Pins 7, 12, 13, 18) VOUTL Output Voltage, Low Load = 500 µA 0.6 V 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) VS Supply Voltage 930 V IS Quiescent Supply Current Pin 1 High 1 3 5 mA 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 VS V IOUTPS ≤ 1 mA Max Output Voltage 16 18 V IOUTPS Power Supply Output Current 7 2mA OPERATING SHUTDOWN (Safety Features) VSSDH Operation Shutdown at High 30 33 36 V Power Supply Voltages 8 VSSDL Operation Shutdown at Low 79 V Power Supply Voltage 9 TEMPERATURE RANGE TA 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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