- Pinout
- Footprint
ADI ADUM1281BRZ
| Manufacturer | |
| MPN | ADUM1281BRZ |
| LCSC Part # | C208174 |
| Packaging | SOIC-8 |
| Customer # | |
| Key Attributes | 3 kV RMS dual-channel digital isolator |
| Datasheet |  ADI ADUM1281BRZ |
Products Specifications
| Type | Description | |
|---|---|---|
| Category | Isolators/Digital Isolators | |
| Manufacturer | ADI | |
| Packaging | SOIC-8 | |
| Features | Bidirectional signal isolation;Multi-voltage domain interface | |
| CMTI(kV/us) | 25kV/us | |
| Propagation Delay(tpd) | 20ns | |
| Number of Channels | 2 | |
| Number of Forward Channels | 1 | |
| Voltage - Supply | 3V~5.5V;3V~5.5V | |
| Number of Reverse Channels | 1 | |
| Operating Temperature | -40℃~+125℃ | |
| Isolation Voltage(Vrms) | 3000 | |
| Data Rate(Max) | 100Mbps | |
| Default Output | High Level |
| Type | Description | |
|---|---|---|
| Category | Isolators/Digital Isolators | |
| Manufacturer | ADI | |
| Packaging | SOIC-8 | |
| Features | Bidirectional signal isolation;Multi-voltage domain interface | |
| CMTI(kV/us) | 25kV/us | |
| Propagation Delay(tpd) | 20ns | |
| Number of Channels | 2 |
| Type | Description | |
|---|---|---|
| Number of Forward Channels | 1 | |
| Voltage - Supply | 3V~5.5V;3V~5.5V | |
| Number of Reverse Channels | 1 | |
| Operating Temperature | -40℃~+125℃ | |
| Isolation Voltage(Vrms) | 3000 | |
| Data Rate(Max) | 100Mbps | |
| Default Output | High Level |
Introduction
The ADuM1280/ADuM1281/ADuM1285/ADuM1286 (also referred to as ADuM128x in this data sheet) are dual-channel digital isolators based on ADI's iCoupler technology. These isolation devices combine high-speed CMOS with monolithic air-core transformer technology, delivering superior performance characteristics over alternatives such as optocouplers and other integrated coupler devices.
These devices feature a propagation delay of 20 ns, with Grade C pulse width distortion less than 2 ns. Grade C also offers tight channel-to-channel matching of 5 ns. The ADuM128x dual channels are independent isolation channels, available in two configuration options and three different data rates, up to 100 Mbps. Industrial-grade models operate from a 2.7 V to 5.5 V supply voltage, while automotive-grade models operate from 3.0 V to 5.5 V, ensuring compatibility with low-voltage systems and enabling voltage translation across the isolation barrier. Unlike conventional optocouplers, ADuM128x isolators feature a patented refresh function that ensures DC correctness in the absence of input logic transitions. Upon initial power-up or when power has not yet been applied to the input side, the ADuM1280 and ADuM1281 default to a logic high output, while the ADuM1285 and ADuM1286 default to a logic low output.
Features
- Data rate up to 100 Mbps (NRZ)
- Low propagation delay: 20 ns (typical)
- Low dynamic power consumption
- Bidirectional communication
- 3 V to 5 V level translation
- Operating temperature up to 125°C
- High common-mode transient immunity: >25 kV/μs
- Default output high: ADuM1280/ADuM1281
- Default output low: ADuM1285/ADuM1286
- 8-lead narrow-body SOIC package, RoHS compliant
- Safety and regulatory approvals — UL recognition: per UL 1577, 1 minute at 3,000 V rms
- CSA Component Acceptance Notice #5A
- VDE certified per DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12, VIORM = 560 V peak
- Automotive application qualified
Applications
- General-purpose multi-channel isolation
- Data converter isolation
- Industrial fieldbus isolation
- Hybrid electric vehicles, battery monitors, and motor drives
| Qty | Unit Price | Total Amount |
|---|---|---|
| 1+ | $ 5.8209 | $ 5.82 |
| 10+ | $ 5.0695 | $ 50.70 |
| 30+ | $ 4.6125 | $ 138.38 |
| 100+ | $ 4.2287 | $ 422.87 |
Standard Packaging98/Full Tube | ||
Products Specifications
| Type | Description | |
|---|---|---|
| Category | Isolators/Digital Isolators | |
| Manufacturer | ADI | |
| Packaging | SOIC-8 | |
| Features | Bidirectional signal isolation;Multi-voltage domain interface | |
| CMTI(kV/us) | 25kV/us | |
| Propagation Delay(tpd) | 20ns | |
| Number of Channels | 2 | |
| Number of Forward Channels | 1 | |
| Voltage - Supply | 3V~5.5V;3V~5.5V | |
| Number of Reverse Channels | 1 | |
| Operating Temperature | -40℃~+125℃ | |
| Isolation Voltage(Vrms) | 3000 | |
| Data Rate(Max) | 100Mbps | |
| Default Output | High Level |
| Type | Description | |
|---|---|---|
| Category | Isolators/Digital Isolators | |
| Manufacturer | ADI | |
| Packaging | SOIC-8 | |
| Features | Bidirectional signal isolation;Multi-voltage domain interface | |
| CMTI(kV/us) | 25kV/us | |
| Propagation Delay(tpd) | 20ns | |
| Number of Channels | 2 |
| Type | Description | |
|---|---|---|
| Number of Forward Channels | 1 | |
| Voltage - Supply | 3V~5.5V;3V~5.5V | |
| Number of Reverse Channels | 1 | |
| Operating Temperature | -40℃~+125℃ | |
| Isolation Voltage(Vrms) | 3000 | |
| Data Rate(Max) | 100Mbps | |
| Default Output | High Level |
Introduction
The ADuM1280/ADuM1281/ADuM1285/ADuM1286 (also referred to as ADuM128x in this data sheet) are dual-channel digital isolators based on ADI's iCoupler technology. These isolation devices combine high-speed CMOS with monolithic air-core transformer technology, delivering superior performance characteristics over alternatives such as optocouplers and other integrated coupler devices.
These devices feature a propagation delay of 20 ns, with Grade C pulse width distortion less than 2 ns. Grade C also offers tight channel-to-channel matching of 5 ns. The ADuM128x dual channels are independent isolation channels, available in two configuration options and three different data rates, up to 100 Mbps. Industrial-grade models operate from a 2.7 V to 5.5 V supply voltage, while automotive-grade models operate from 3.0 V to 5.5 V, ensuring compatibility with low-voltage systems and enabling voltage translation across the isolation barrier. Unlike conventional optocouplers, ADuM128x isolators feature a patented refresh function that ensures DC correctness in the absence of input logic transitions. Upon initial power-up or when power has not yet been applied to the input side, the ADuM1280 and ADuM1281 default to a logic high output, while the ADuM1285 and ADuM1286 default to a logic low output.
Features
- Data rate up to 100 Mbps (NRZ)
- Low propagation delay: 20 ns (typical)
- Low dynamic power consumption
- Bidirectional communication
- 3 V to 5 V level translation
- Operating temperature up to 125°C
- High common-mode transient immunity: >25 kV/μs
- Default output high: ADuM1280/ADuM1281
- Default output low: ADuM1285/ADuM1286
- 8-lead narrow-body SOIC package, RoHS compliant
- Safety and regulatory approvals — UL recognition: per UL 1577, 1 minute at 3,000 V rms
- CSA Component Acceptance Notice #5A
- VDE certified per DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12, VIORM = 560 V peak
- Automotive application qualified
Applications
- General-purpose multi-channel isolation
- Data converter isolation
- Industrial fieldbus isolation
- Hybrid electric vehicles, battery monitors, and motor drives
C208174 EasyEDA Library
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
| Type | Details |
|---|---|
| RoHS | |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |