AD22001

Continuous Status Checks of Five Bulbs
Lamp Status Check in "ON" and "OFF" States
Status Checks of Two In-Line Fuses
Very Low Voltage Drop at Sensor Shunt Resistor 
   (Comparator Threshold 1.75 mV at 22C)
Temperature and Supply Voltage Compensated
Powered Directly from Car Battery: Protection
   Included for Transient, Reverse Supply, Load Dump
Operating Temperature Range: 40C to +125C
15 V CMOS Compatible Digital Output Signals
Voltage Limited Power Supply Output for 15 V CMOS Logic ICs

The AD22001 is a monolithic, five-channel comparator circuit for monitoring the functionality of lamps in automotive
applications.

The IC tests the series circuit leading to the lamp to determine if the circuit is intact and a functional lamp is in the socket. The AD22001 continuously checks the functionality of up to five bulbs in either their "on" or "off" state, and also tests for the presence of an in-line fuse in two of the series circuits.

Digital outputs indicate the status of each channel. Additionally,the AD22001 provides a voltage limited power supply output to supply 15 V CMOS circuits that may interface to the AD22001.