1.25 Gbps LVDS isolation — what it buys you
The ADN4654BRWZ is a two-channel, unidirectional LVDS isolator from Analog Devices' iCoupler series, built with magnetic coupling technology. It pushes 1.25 Gbps per channel — enough for high-speed serial links like Camera Link, GigE Vision, or JESD204B clock distribution — while providing 5000 Vrms of galvanic isolation. The 2/0 input-side/side-2 count means both channels run the same direction, so it handles a differential pair or two independent LVDS lines from controller to peripheral. Rise and fall times are 0.35 ns max, and propagation delay is 4.5 ns max in either direction. That keeps the timing budget tight — you can run a 1.25 Gbps stream through the isolator without eating into the setup-and-hold margin on the receiver side. Common-mode transient immunity is 25 kV/µs minimum, so it holds the link through motor-drive switching events or relay bounce without bit errors.
Supply rail and temperature range
The part runs on a 2.375 V to 2.625 V supply — a narrow 2.5 V rail only. That is a deliberate choice: LVDS signalling levels are 1.2 V differential, and a 2.5 V core keeps the output swing within the LVDS standard without extra level shifting. If your board runs 3.3 V or 1.8 V logic, you will need a local regulator or a separate 2.5 V plane for this isolator.
Package and footprint
Housed in a 20-SOIC wide-body (0.295-inch body width, 7.50 mm width), the ADN4654BRWZ uses the standard SOIC-20W footprint. The wide-body package gives the creepage distance needed for the 5000 Vrms isolation rating — expect at least 8 mm clearance between primary and secondary sides on the PCB. Surface-mount only; no through-hole option.