ADUM1442ARWZ - Micropower Quad-Channel Digital Isolator | Analog Devices
MPN: ADUM1442ARWZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.15 | $31.50 |
| 100 | $2.8 | $280.00 |
| 500 | $2.5 | $1,250.00 |
| 1,000 | $2.25 | $2,250.00 |
Drop-in alternatives for ADUM1442ARWZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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View Datasheet →ADUM1442ARWZ Maximum Ratings & Electrical Characteristics
| Number of Channels | 4 |
| Isolation Voltage | 2500 Vrms |
| Data Rate | 2 Mbps |
| CMTI | 25 kV/µs |
| Supply Voltage (VDD1/VDD2) | 3.0 V to 3.6 V |
| Operating Temperature Range | -40°C to +125°C |
| Quiescent Current per Channel (ENx=0) | <10 µA |
| Quiescent Current per Channel (ENx=1) | <1 µA |
| Propagation Delay | 100 ns (typical) |
| Pulse Width Distortion | [DATA_NEEDED: Pulse Width Distortion] |
| Package | 16-Lead SOIC-W |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Technology | iCoupler |
| Output Type | Digital |
ADUM1442ARWZ Pin Configuration
| Pin 1 | VDD1 — Supply voltage for side 1 |
| Pin 2 | GND1 — Ground for side 1 |
| Pin 3 | VIA — Input channel A |
| Pin 4 | VOA — Output channel A |
| Pin 5 | VIB — Input channel B |
| Pin 6 | VOB — Output channel B |
| Pin 7 | EN1 — Enable for channels A and B |
| Pin 8 | GND1 — Ground for side 1 |
| Pin 9 | GND2 — Ground for side 2 |
| Pin 10 | EN2 — Enable for channels C and D |
| Pin 11 | VOC — Output channel C |
| Pin 12 | VIC — Input channel C |
| Pin 13 | VOD — Output channel D |
| Pin 14 | VID — Input channel D |
| Pin 15 | GND2 — Ground for side 2 |
| Pin 16 | VDD2 — Supply voltage for side 2 |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADUM1442ARWZ is suitable for 6 applications: Isolated SPI Interface, Medical Patient Monitoring, Battery Management Systems, Industrial Fieldbus Communication, Isolated Power Supply Feedback, Isolated Sensor Data Acquisition.
Isolated SPI Interface
The ADUM1442ARWZ provides galvanic isolation for SPI buses in industrial sensors and motor drives. With 4 channels, it can isolate SCLK, MOSI, MISO, and CS signals. Its 2 Mbps data rate is sufficient for most SPI peripherals, and its low power consumption is ideal for battery-powered field devices. The high CMTI of 25 kV/µs ensures reliable operation in noisy industrial environments, preventing data corruption from voltage transients.
Recommended
Medical Patient Monitoring
In medical devices, the ADUM1442ARWZ isolates sensitive patient-connected circuits from the main system, ensuring safety and preventing ground loops. Its 2500 Vrms isolation rating meets typical medical safety standards. The micropower operation extends battery life in portable monitors. The wide temperature range and high reliability make it suitable for continuous monitoring applications.
Recommended
Battery Management Systems
The ADUM1442ARWZ is used in battery management systems to isolate the cell monitoring circuitry from the main controller. Its low quiescent current (<10 µA per channel) is critical for minimizing battery drain. The 4 channels can isolate communication lines between the battery pack and the host. The high CMTI ensures reliable operation in the presence of switching noise from power converters.
Recommended
Industrial Fieldbus Communication
For industrial fieldbus systems like Profibus or Modbus, the ADUM1442ARWZ provides isolation between the bus transceiver and the controller. Its 2 Mbps data rate supports common fieldbus speeds. The high CMTI of 25 kV/µs protects against transient voltages from motors and relays. The device's small SOIC-W package saves board space in space-constrained industrial modules.
Recommended
Isolated Power Supply Feedback
The ADUM1442ARWZ can be used to isolate the feedback signal in switch-mode power supplies, providing a safe path for the error amplifier output. Its low propagation delay (100 ns) ensures fast response. The micropower operation reduces the load on the auxiliary supply. The device's high CMTI prevents false triggering from switching noise.
Recommended
Isolated Sensor Data Acquisition
In data acquisition systems, the ADUM1442ARWZ isolates the sensor interface from the main ADC and controller. This prevents ground loops and reduces noise. The 4 channels can carry clock, data, and control signals. The low power consumption is beneficial for remote sensor nodes. The wide temperature range allows operation in harsh environments.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1442ARWZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1442ARQZ | ADUM1442ARSZ | ADUM1441ARWZ |
|---|---|---|---|---|
| Package | 16-Lead SOIC-W | 16-Lead QSOP | 20-Lead SSOP | 16-Lead SOIC-W |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 3750 Vrms | 2500 Vrms |
| Data Rate | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Supply Voltage Range | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Quiescent Current per Channel (ENx=0) | <10 µA | <10 µA | <10 µA | <10 µA |
| Channel Direction | 3/1 (3 forward, 1 reverse) | 3/1 | 3/1 | 2/2 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
Key Differentiators
- Micropower operation with <10 µA per channel (vs ADUM1442ARQZ)
- High CMTI of 25 kV/µs (vs ADUM1442ARSZ)
- Pin-compatible with other ADuM144x variants (vs ADUM1441ARWZ)
Design Notes
Ensure that both VDD1 and VDD2 are within the specified range of 3.0 V to 3.6 V. Use 0.1 µF decoupling capacitors placed as close as possible to each supply pin. For optimal performance, a 10 µF bulk capacitor may be added if the supply is noisy. The micropower operation means that the supply current is very low, but proper decoupling is still essential to maintain signal integrity.
For high CMTI performance, keep the PCB layout symmetrical and minimize parasitic capacitance between the two sides of the isolation barrier. Avoid routing high-speed signals under the device. Use a solid ground plane on each side, but do not connect the grounds together except through the isolation barrier. This ensures that the CMTI specification is met.
Do not exceed the absolute maximum ratings for supply voltage or input/output voltages. The enable pins (EN1, EN2) should be tied to the appropriate logic level to achieve the desired power mode. When ENx=1, the internal refresh is disabled, which reduces power but may affect the output state if the input is not toggling. Ensure that the input signals are properly terminated to avoid floating inputs.
Compliance Information
RoHS compliance is indicated by the 'Z' suffix in the part number. Other compliance details are not specified in the provided data.
