ADuM7442S

RECOMMENDED FOR NEW DESIGNS

Aerospace 25 MBPS Quad-Channel Digital Isolator

Data Sheet (Rev. E) Product Selection Table
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Overview

  • 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.

Applications

  • General-purpose, multichannel isolation
  • SPI interface/data converter isolation
  • RS-232/RS-422/RS-485 transceivers

ADuM7442S
Aerospace 25 MBPS Quad-Channel Digital Isolator
ADuM7442 Functional Block Diagram
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Documentation

Data Sheet 1

User Guide 1

Application Note 1

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Evaluation Kits

eval board
schematic 1
EVAL-ADUM7442S

ADuM7442S Evaluation Board

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Features and 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)

Product Details

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.

EVAL-ADUM7442S
ADuM7442S Evaluation Board
ADuM7442S Evaluation Board

Latest Discussions

39 Weeks Ago
ADUM7442 ESD Rating
40 Weeks Ago
Inquiry regarding the release of channels 3/1, 4/0, and 6/0 of the same class as the product. (+Additional method of changing sign-in account)
1 Years Ago
LTSPICE Model?
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