Two-channel capacitive isolator, 150 Mbps, 3750 Vrms — where the specs matter
The MAX12930FASA+ is a 2-channel unidirectional digital isolator using capacitive coupling, rated for 3750 Vrms isolation and a 150 Mbps data rate. It sits in the General Purpose isolator class from Analog Devices, targeting signal isolation in industrial fieldbuses, motor drives, and isolated power supplies where you need to break ground loops without sacrificing speed.
Supply range and logic-level flexibility
Inputs on Side 1 only (2/0 split), meaning both channels drive from the same input side — the output side is all receivers.
Propagation delay is 9.2 ns max (tpLH) and 9.4 ns max (tpHL), with pulse-width distortion held to 2 ns max. That 9 ns window sets the timing budget for a 150 Mbps serial link — you lose about 1.35 ns per edge in the isolator, leaving the rest for cable and receiver. Common-mode transient immunity is 50 kV/µs typical, which is the figure that matters when the isolator sits between a 600 V motor-drive phase and a 3.3 V controller: a fast switching transient on the high-voltage side won't glitch the output.
Package and rework — 8-SOIC with a 3.90 mm body
Pin 1 is clearly marked on the body; orientation is unambiguous.
Temperature range and compliance
ROHS3 compliant per.