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AD22001 Datasheet(PDF) 1 Page - Analog Devices |
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AD22001 Datasheet(HTML) 1 Page - Analog Devices |
1 / 8 page FUNCTIONAL BLOCK DIAGRAM SWITCH & LIMITER 4 5 6 9 8 CHANNEL 1 CHANNEL 2 CHANNEL 3 2 1 20 3 7 11 10 13 12 CHANNEL 4 CHANNEL 5 14 15 16 17 19 18 CHIP ENABLE GND +IN1 –IN1 –IN2 +IN2 –IN3 +IN3 –IN4 +IN4 –IN5 +IN5 POWER OUT OUT 1 & 2 OUT 3 & 4 OUT (3 × 4) OUT 5 AD22001 INFUSE1 & 2 INFUSE5 +VS REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a 5-Channel Monolithic Comparator for Lamp Monitoring AD22001* One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 FEATURES 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 22 C) Temperature and Supply Voltage Compensated Powered Directly from Car Battery: Protection Included for Transient, Reverse Supply, Load Dump Operating Temperature Range: –40 C to +125 C 15 V CMOS Compatible Digital Output Signals Voltage Limited Power Supply Output for 15 V CMOS Logic ICs GENERAL DESCRIPTION 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. FUSE +V BATT SWITCH COPPER SHUNT RESISTOR LAMP SIGNAL CONDITIONING AND SIGNAL PROCESSING OUTPUT Figure 1. Typical Application Circuit for a Single Channel Lamp Monitor |
Similar Part No. - AD22001_15 |
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Similar Description - AD22001_15 |
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