Analog Devices Inc. ADuM144x Quad-Channel Digital Isolators
Analog Devices Inc. ADuM144x Quad-Channel Digital Isolators are micropower devices based on iCoupler® technology. ADI ADuM144x isolators combine high speed, CMOS, and monolithic air core transformer technologies to provide outstanding performance characteristics compared to optocoupler devices.
The ADI ADuM144x digital isolators also offer a low power. The ENX signals can be used to disable the internal refresh, which lowers the total quiescent current to less than 1µA. These devices free almost 70% of board space but can still withstand high isolation voltages and meet regulatory requirements. ADuM144x isolators operate with supplies as low as 2.25V. This device family also provides low, pulse width distortion <8ns. These devices also have an input glitch filter to protect against extraneous noise disturbances.
EVAL-ADuM144x-EBZ supports the ADuM144x family of ultra low power, quad channel isolators. It provides a JEDEC standard QSOP16 pad layout, support for signal distribution, loop back, bypass capacitors, and loads referenced to VDDX or GNDX.
Features
- Ultralow power operation
- 3.3V operation (typical)
- 5.6μA per channel quiescent current, refresh enabled
- 0.3μA per channel quiescent current, refresh disabled
- 148μA/Mbps per channel typical dynamic current
- 2.5V operation (typical)
- 3.1μA per channel quiescent current, refresh enabled
- 0.1μA per channel quiescent current, refresh disabled
- 117μA/Mbps per channel typical dynamic current
- Small, 16-lead QSOP
- Bidirectional communication
- Up to 2Mbps data rate (NRZ)
- High temperature operation of 125°C
- High common-mode transient immunity of >25kV/μs
Applications
- General-purpose, low power multichannel isolation
- 1MHz, low power Serial Peripheral Interface (SPI)
- 4mA to 20mA loop process controls
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