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