Micropower, Dual-Channel Digital Isolators, Default High (2/0 Channel Directionality)
The ADuM1240 is a micropower, dual-channel default high digital isolator with 2/1 directionality based on the Analog Devices, Inc., iCoupler® technology (Quad-channel products available). Combining high speed CMOS and monolithic air core transformer technologies, these isolation components provide outstanding performance characteristics superior to alternatives, such as optocoupler devices, yet require the lowest power of any available isolation product.
Packaged in an 8-lead SOIC, this series of quad, 3 kV digital isolation devices operate with supplies as low as 2.5 V, offering the lowest available power consumption at a fraction of the power of comparable isolators at comparable data rates (up to 2 Mbps). In addition, all models provide low pulse width distortion (<8 ns for A grade) and an input glitch filter for extraneous noise disturbance protection.
All models operate with the supply voltage on either side ranging as low as 2.25 V, providing compatibility with lower voltage systems, as well as enabling voltage translation functionality across the isolation barrier. All products also have an output default logic state in the absence of the input power. When power is first applied, or is not yet applied to the input side, the ADuM1240 and ADuM1241 have a default high output and the ADuM1245 and ADuM1246 have a default low output.
- Outstanding Power Performance. These 3 kV digital
isolators operate with 2.5 V supplies.
- Distortion and Noise Protection. Low pulse width
distortion (< 8 ns for A grade models) and an input glitch
filter for extraneous noise disturbance protection.
iCoupler Technology. Patented Analog Devices technology combining high speed CMOS and monolithic air core transformer technologies.
- General-purpose, low power, multichannel isolation
- 1 MHz low power SPI
- 4 mA to 20 mA loop process control
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
The board follows best printed circuit board (PCB) design practices for 4-layer boards, including a full power and ground plane on each side of the isolation barrier. No other EMI or noise mitigation design features are included on this board. In cases of very high speed operation or when ultralow emissions are required, refer to the AN-1109 application note for additional board layout techniques.
Safety and Regulatory Compliance
Safety and Regulatory Compliance Information
The iCoupler® family of digital isolation products have been tested and approved by various regulatory agencies,...
Design Trade-Offs for Loop-Powered Transmitters
By Derrick Hartmann Applications Engineer, Analog Devices, Inc.
MS-2644: Ultralow Power Opening Applications to High Speed Isolation
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.