GENERAL DESCRIPTION
The ADuM1440/ADuM1441/ADuM1442/ADuM1445/ADuM1446/ADuM14471 are micropower, 4-channel digital isolators based on the Analog Devices, Inc., iCoupler® technology. Combining high speed, complementary metal oxide semiconductor (CMOS) and monolithic air core transformer technologies, these isolation components provide outstanding performance characteristics superior to the alternatives, such as optocoupler devices. As shown in Figure 2, in standard operating mode, when ENx = 0 (internal refresh enabled), the current per channel is less than 10 µA. When ENx = 1 (internal refresh disabled), the current per channel drops to less than 1 µA.

FEATURES
Ultralow power operation
  3.3 V operation (typical)
    5.6 µA per channel quiescent current, refresh enabled
    0.3 µA per channel quiescent current, refresh disabled
    148 µA/Mbps per channel typical dynamic current
  2.5 V operation (typical)
    3.1 µA per channel quiescent current, refresh enabled
    0.1 µA per channel quiescent current, refresh disabled
    117 µA/Mbps per channel typical dynamic current
Small, 16-lead QSOP
Bidirectional communication
Up to 2 Mbps data rate (NRZ)
High temperature operation: 125°C
High common-mode transient immunity: >25 kV/µs
Safety and regulatory approvals
  UL 1577 Component Recognition Program (pending)
    2500 V rms for 1 minute per UL 1577
  CSA Component Acceptance Notice #5A (pending)
  VDE Certificate of Conformity (pending)
    DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
    VIORM = 560 VPEAK
 
APPLICATIONS
General-purpose, low power multichannel isolation
1 MHz, low power peripheral interface (SPI)
4 mA to 20 mA loop process controls