ADUM1281 3kV rms, Default High, Dual-Channel Digital Isolators (1/1 Channel Directionality)
The ADuM1280/ADuM1281/ADuM1285/ADuM1286 are dual-channel digital isolators based on
Analog Devices, Inc., iCoupler® technology. Combining high
speed CMOS and monolithic air core transformer technology,
these isolation components provide outstanding performance
characteristics superior to alternatives such as optocoupler
devices and other integrated couplers.
With propagation delay at 20 ns, pulse width distortion is less
than 2 ns for C grade. Channel-to-channel matching is tight at
5ns for C grade. The two channels of ADuM1280/ADuM1281/ADuM1285/ADuM1286 are
independent isolation channels and are available in two channel
configurations with 3 different data rates up to 100Mbps (see
the Ordering Guide). All models operate with the supply
voltage on either side ranging from 2.7 V to 5.5 V, providing
compatibility with lower voltage systems as well as enabling a
voltage translation functionality across the isolation barrier.
Unlike other optocoupler alternatives, the ADuM128x isolators
have a patented refresh feature that ensures dc correctness in
the absence of input logic transitions. When power is first
applied or is not yet applied to the input side, the ADuM1280
and ADuM1281 have a default high output and the ADuM1285
and ADuM1286 have a default low output.
Applications
- General-purpose multichannel isolation
- Data converter isolation
- Industrial field bus isolation
Features and BenefitsUp to 100 Mbps data rate (NRZ)Low propagation delay:20 ns typicalLow dynamic power consumptionBidirectional communication3V to 5V level translationHigh temperature operation: 125°CHigh common-mode transient immunity: >25 kV/μsDefault high output: ADuM1280/ADuM1281Default low output: ADuM1285/ADuM1286Narrow body, RoHS-compliant, 8-lead SOICSee data sheet for additional features | Automotive- Powertrain Body and Chassis
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Data Sheets
Order Information
Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
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ADUM1281ARZ Production | 8 ld SOIC | OTH 98 | -40 to 125C | 1.06 | 0.88 | Y |
ADUM1281ARZ-RL7 Production | 8 ld SOIC | REEL 1000 | -40 to 125C | 0 | 0.88 | Y |
ADUM1281BRZ Production | 8 ld SOIC | OTH 98 | -40 to 125C | 1.36 | 1.12 | Y |
ADUM1281BRZ-RL7 Production | 8 ld SOIC | REEL 1000 | -40 to 125C | 0 | 1.12 | Y |
ADUM1281CRZ Production | 8 ld SOIC | OTH 98 | -40 to 125C | 1.57 | 1.3 | Y |
ADUM1281CRZ-RL7 Production | 8 ld SOIC | REEL 1000 | -40 to 125C | 0 | 1.3 | Y |
ADUM1281WARZ Production | 8 ld SOIC | OTH 98 | -40 to 125C | 1.65 | 1.46 | Y |
ADUM1281WARZ-RL7 Production | 8 ld SOIC | REEL 1000 | -40 to 125C | 0 | 1.46 | Y |
ADUM1281WBRZ Production | 8 ld SOIC | OTH 98 | -40 to 125C | 2.42 | 2.14 | Y |
ADUM1281WBRZ-RL7 Production | 8 ld SOIC | REEL 1000 | -40 to 125C | 0 | 2.14 | Y |
ADUM1281WCRZ Production | 8 ld SOIC | OTH 98 | -40 to 125C | 3.34 | 2.96 | Y |
ADUM1281WCRZ-RL7 Production | 8 ld SOIC | REEL 1000 | -40 to 125C | 0 | 2.96 | Y |
Evaluation Boards
Part Number | Description | Price | RoHS |
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EVAL-1CH2CHSOICEBZ | 1 and 2 Channel Unpopulated SOIC Evaluation Board | 49 | Y |
EVAL-ADUM226N0EBZ | ADuM226N0 Populated 2 Channel ISO Evaluation Board | 49 | Y |
Reference Materials