GENERAL DESCRIPTION
The ADuM7440/ADuM7441/ADuM74421 are 4-channel digital isolators based on the Analog Devices, Inc., iCoupler® technology. Combining high speed CMOS and monolithic air core transformer technologies, these isolation components provide outstanding performance characteristics superior to the alternatives, such as optocoupler devices and other integrated couplers.

FEATURES
   Small, 16-lead QSOP
   1000 V rms isolation rating
   Safety and regulatory approvals
      UL recognition
         UL 1577: 1000 V rms for 1 minute
   Low power operation
      5 V operation
         2.25 mA per channel maximum at 0 Mbps to 1 Mbps
         11.5 mA per channel maximum at 25 Mbps
      3.3 V operation
         1.5 mA per channel maximum at 0 Mbps to 1 Mbps
         8.25 mA per channel maximum at 25 Mbps
   Bidirectional communication
   Up to 25 Mbps data rate (NRZ)
   3 V/5 V level translation
   High temperature operation: 105°C
   High common-mode transient immunity: >15 kV/μs

APPLICATIONS
   General-purpose, multichannel isolation
   SPI interface/data converter isolation
   RS-232/RS-422/RS-485 transceivers
   Industrial field bus isolation