Datasheet Analog Devices LTC1921 — Ficha de datos

LTC1921
Dual –48V Supply
and Fuse Monitor U FEATURES
■
■
■ ■ ■
■
■
■
■
■ DESCRIPTIO The LTC®1921 monitors two independent – 48V supplies,
including their fuses, and drives up to three optoisolators
to indicate status, in accordance with standard backplane
specifications. Requiring only three noncritical resistors
and optoisolators, the LTC1921 replaces multiple voltage
comparators, a voltage reference and several precision
resistors. Withstands Transient Voltages Up to 200V/–200V
Requires No Precision External Components
Independently Monitors Two –48V Supplies for
– Undervoltage Faults: –38.5V ±1VMAX
– Overvoltage Faults: –70V ±1.5VMAX
Accurately Detects Undervoltage Fault Recovery:
–43V ±0.5VMAX …