DESCRIPTION
The LTC®1531 is an isolated self-powered dual differential comparator. An internal capacitive isolation barrier provides 3000VRMS 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
■ Self-Powered Across Isolation Barrier
■ 3000VRMS Isolation
■ 2.5V Isolated Reference, ILOAD = 5mAMAX
■ UL Qualification Pending
■ 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