DESCRIPTION
The LTC®1531 is an isolated self-powered dual differential comparator. An internal capacitive isolation barrier provides 2500VRMS of isolation between the comparator and its output. The part provides UL-rated isolated comparisons without the need for an isolated supply since both comparator power and output data are transmitted across the capacitive barrier. The comparator data is transferred differentially across the isolation barrier to provide high common mode voltage and noise immunity.

FEATURES
■ UL Recognized File E151738 to UL1577
■ Self-Powered Across Isolation Barrier
■ 2500VRMS Isolation
■ 2.5V Isolated Reference, ILOAD = 5mAMAX
■ Zero-Cross Output for Line Power
■ Dual Differential Input Comparator
■ High Input Impedance Comparator

APPLICATIONS
■ Self-Powered Isolated Sensing
■ Isolated Temperature Control
■ Isolated Voltage Monitor
■ Isolated Switch Control