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Features and Benefits
- Small 16-lead Flatpack package
- 200 V rms isolation rating
- Low power operation
- 5 V operation
- 20 mA per channel maximum at 25 Mbps
- 3.3 V operation
- 14 mA per channel maximum at 25 Mbps
- Bidirectional communication
- Up to 25 Mbps data rate (NRZ)
- 3 V/5 V level translation
- High temperature operation: 125°C
- 100K Radiation Performance
The ADuM7442S is a 4-channel digital isolator based on the Analog Devices, Inc., iCoupler® technology. Combining high speed CMOS and monolithic air core transformer technologies, this isolation component provides outstanding performance characteristics superior to the alternatives, such as optocoupler devices and other integrated couplers.
The ADuM7442S quad digital isolation device is packaged in a small 16-lead Flatpack. It offers very low power consumption, consuming one-tenth to one-sixth the power of comparable isolators at comparable data rates up to 25 Mbps. Despite the low power consumption, the ADuM7442S provides low pulse width distortion (<5 ns). The ADuM7442S also has an input glitch filter to protect against extraneous noise disturbances.
The ADuM7442S isolator provides four independent isolation channels up to 25 Mbps. The ADuM7442S operates with the supply voltage on either side ranging from 3.0 V to 5.5 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 high logic state in the absence of the input signal.
- General-purpose, multichannel isolation
- SPI interface/data converter isolation
- RS-232/RS-422/RS-485 transceivers
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
The EVAL-ADuM7442S supports the ADuM7442S 25MBPS Space Grade Quad Channel Digital Isolator. The evaluation board provides access to all 4 channels, support for signal fan-out and loopback as well as optimal bypass capacitance. Signals can be brought onto the board through the edge-mounted SMA connectors or wired directly by utilizing unpopulated header positions. Decoupled terminal blocks are provided for power connections along with support for edge-mounted SMA connectors. Compatibility with Tektronix active probes is provided by the inclusion of 200 mil header positions.
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. While interplane capacitance bypassing is implemented on the PCB to minimize noise and EMI transmission, no other mitigation design features are included. In cases of high speed operation or when ultralow emissions are required, refer to the AN-1109 application note for additional board layout techniques.
Features & Benefits
- Access to all 4 data channels
- Multiple connection options
- Ability to power each side of isolator independently
- User configurable load options for the input and output channels
- Support for Tektronix active probes
- Installed with ADuM7442AF-EMX engineering unit (same form, fit and function over full temp range as flight units)
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Technical Articles (1)
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.
Sample & Buy
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.