ADuM121N Datasheet

• High common-mode transient immunity: 100 kV/µs typical
• High robustness to radiated and conducted noise
• Low propagation delay
  • 13 ns maximum for 5 V operation
  • 15 ns maximum for 1.8 V operation
• 150 Mbps minimum data rate
• Safety and regulatory approvals
  • UL 1577
    • V_ISO = 3000 V rms for 1 minute
  • IEC/CSA 62368-1
  • IEC/CSA 60601-1
  • IEC/CSA 61010-1
  • CQC GB4943.1
  • DIN EN IEC 60747-17 (VDE 0884-17)
    • V_IORM = 565 V peak
• Backward compatibility
  • ADuM121N0 pin-compatible with ADuM1286
  • ADuM121N1 pin-compatible with ADuM1281 and ADuM1201
• Low dynamic power consumption
• 1.8 V to 5 V level translation
• High temperature operation: 125°C
• Failsafe high or low options
• 8-lead, RoHS-compliant, SOIC package
• AEC-Q100 qualified for automotive applications

• General-purpose multichannel isolation
• Industrial field bus isolation

The ADuM121N are dual-channel digital isolators based on Analog Devices, Inc., iCoupler^® technology. Combining high speed, complementary metal-oxide semiconductor (CMOS) and monolithic air core transformer technology, these isolation components provide outstanding performance characteristics superior to alternatives such as optocoupler devices and other integrated couplers. The maximum propagation delay is 13 ns with a pulse width distortion of less than 3 ns at 5 V operation. Channel matching is tight at 3.0 ns maximum.

The ADuM121N data channels are independent and are available in a variety of configurations with a withstand voltage rating of 3 kV rms (see the Ordering Guide). The devices operate with the supply voltage on either side ranging from 1.8 V to 5 V, providing compatibility with lower voltage systems as well as enabling voltage translation functionality across the isolation barrier.

Unlike other optocoupler alternatives, dc correctness is ensured in the absence of input logic transitions. Two different fail-safe options are available in which the outputs transition to a predetermined state when the input power supply is not applied or the inputs are disabled.

The ADuM121N0 is pin-compatible with ADuM1286, and the ADuM121N1 is pin-compatible with the ADuM1281 and the ADuM1201.