The ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474 devices are isolated PWM controllers with integrated transformer drivers that can be used for RS-232/RS-422/RS-485 transceivers, industrial field bus isolation, power supply startup bias and gate drives, isolated sensor interfaces, and process controls.
The ADuM347x family are quad‑channel digital isolators that integrate a PWM controller and transformer driver to deliver isolated DC‑to‑DC conversion. They provide up to 2 W of regulated, isolated power with output voltages adjustable from 3.3 V to 24 V.
Key features include isolated PWM control, high‑efficiency operation (up to 70 % at full load), 2500 Vrms isolation, and data rates up to 25 Mbps. The devices are suited for RS‑232/RS‑422/RS‑485 transceiver isolation, industrial field‑bus isolation, power‑supply startup bias, gate‑drive isolation, and isolated sensor interfaces.
| Isolated Output Voltage | 5.0 V (typ) |
|---|---|
| Feedback Voltage Setpoint | 1.25 V (typ) |
| Line Regulation | 10 mV/V (typ) |
| Load Regulation | 2 % (typ) |
| Maximum Data Rate (CRWZ) | 25 Mbps |
| Common‑Mode Transient Immunity | ≥25 kV/ps |
| Efficiency at Maximum Output | 70 % |
| Isolation Voltage Rating | 2500 Vrms |
The device provides a regulated adjustable output from 3.3 V to 24 V.
The CRWZ version supports a maximum data rate of 25 Mbps.
The devices are rated for 2500 Vrms isolation.