ADUM1442ARWZ-RL7 - Micropower Quad Digital Isolator | Analog Devices
MPN: ADUM1442ARWZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.12 | $4.12 |
| 10 | $3.71 | $37.10 |
| 100 | $3.3 | $330.00 |
| 500 | $2.89 | $1,445.00 |
| 1,000 | $2.48 | $2,480.00 |
Drop-in alternatives for ADUM1442ARWZ-RL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM1442ARSZ-RL7
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1442ARQZ-RL7
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1441ARWZ-RL7
✅ Drop-In✓ In Stock
$2.2 / Unit
View Datasheet →ADUM1440ARWZ-RL7
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →ADUM1445ARWZ-RL7
✅ Drop-In✓ In Stock
$2.25 / Unit
View Datasheet →ADUM1446ARWZ-RL7
✅ Drop-In✓ In Stock
$2.22 / Unit
View Datasheet →ADUM1447ARWZ-RL7
✅ Drop-In✓ In Stock
$5.5 / Unit
View Datasheet →ADUM1241ARSZ-RL7
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1442ARWZ-RL7 Maximum Ratings & Electrical Characteristics
| Number of Channels | 4 |
| Channel Configuration | 2/2 (2 forward, 2 reverse) |
| Isolation Rating | 3750 Vrms |
| Data Rate | 2 Mbps |
| CMTI | 25 kV/µs |
| Supply Voltage (VDD1/VDD2) | 3.0 V to 3.6 V |
| Supply Current (per channel) | 0.6 mA typical at 3.3 V |
| Propagation Delay | 23 ns typical |
| Pulse Width Distortion | 3 ns typical |
| Operating Temperature Range | -40°C to +125°C |
| Package | 20-SOIC-W (RW-20) |
| Mounting Type | Surface Mount |
| Default Output State | High |
| Enable Function | Yes (per side) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
ADUM1442ARWZ-RL7 Pin Configuration
| Pin 1 | VDD1 — Supply voltage for side 1 |
| Pin 2 | GND1 — Ground for side 1 |
| Pin 3 | VIA — Input channel A (side 1) |
| Pin 4 | VIB — Input channel B (side 1) |
| Pin 5 | VOC — Output channel C (side 1) |
| Pin 6 | VOD — Output channel D (side 1) |
| Pin 7 | EN1 — Enable for side 1 outputs |
| Pin 8 | GND1 — Ground for side 1 |
| Pin 9 | NC — No connect |
| Pin 10 | NC — No connect |
| Pin 11 | NC — No connect |
| Pin 12 | NC — No connect |
| Pin 13 | GND2 — Ground for side 2 |
| Pin 14 | EN2 — Enable for side 2 outputs |
| Pin 15 | VIC — Input channel C (side 2) |
| Pin 16 | VID — Input channel D (side 2) |
| Pin 17 | VOA — Output channel A (side 2) |
| Pin 18 | VOB — Output channel B (side 2) |
| Pin 19 | GND2 — Ground for side 2 |
| Pin 20 | 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-RL7 is suitable for 6 applications: Industrial Field Bus Isolation, SPI Isolation, RS-232/RS-485 Isolation, Battery-Powered Systems, Medical Device Isolation, General-Purpose Digital Isolation.
Industrial Field Bus Isolation
The ADUM1442ARWZ-RL7 provides galvanic isolation for industrial field bus interfaces such as RS-485, CAN, and PROFIBUS. Its 3750 Vrms isolation rating and 25 kV/µs CMTI ensure reliable communication in harsh industrial environments with high voltage transients and ground potential differences. The micropower operation (0.6 mA per channel) minimizes power dissipation in remote I/O modules, extending the life of power-constrained systems. The 2 Mbps data rate is sufficient for most field bus protocols, and the 2/2 channel configuration allows bidirectional communication. The wide operating temperature range (-40°C to +125°C) ensures operation in extreme industrial conditions. When used with a transceiver like the ADM2483, the isolator provides complete isolation for the bus interface, protecting the microcontroller from ground loops and electrical noise.
Recommended
SPI Isolation
The ADUM1442ARWZ-RL7 is ideal for isolating SPI buses between microcontrollers and peripheral devices such as ADCs, DACs, and sensors. Its 2 Mbps data rate is sufficient for many SPI applications, and the 2/2 channel configuration can be used to isolate the clock and data lines in both directions. The low propagation delay (23 ns) ensures minimal timing skew, which is critical for SPI communication. The micropower operation is beneficial in battery-powered systems where the isolator is always active. The 3750 Vrms isolation rating protects sensitive digital logic from high-voltage transients on the peripheral side. For higher-speed SPI, consider the ADUM1442's higher-speed variants, but for most applications, this device provides a robust and low-power solution. The enable function allows the outputs to be tri-stated, which is useful for multi-drop SPI configurations.
Recommended
RS-232/RS-485 Isolation
The ADUM1442ARWZ-RL7 can be used to isolate RS-232 or RS-485 communication lines, providing galvanic isolation between the UART and the transceiver. This prevents ground loops and protects the system from voltage spikes on the communication lines. The 2 Mbps data rate supports standard baud rates up to 115200 and beyond. The 2/2 channel configuration allows for separate transmit and receive paths, and the enable function can be used to disable the receiver during transmission to avoid echo. The high CMTI (25 kV/µs) ensures reliable operation in electrically noisy environments. The micropower operation is advantageous in portable or battery-powered devices. When combined with a transceiver like the ADM2483, the isolator provides complete isolation for the bus interface, protecting the microcontroller from ground loops and electrical noise.
Recommended
Battery-Powered Systems
The ADUM1442ARWZ-RL7 is well-suited for battery-powered systems where power consumption is critical. Its micropower operation (0.6 mA per channel) minimizes the impact on battery life. The wide supply voltage range (3.0 V to 3.6 V) is compatible with common battery voltages such as 3.3 V. The low propagation delay and high CMTI ensure reliable operation in portable devices that may be subject to electromagnetic interference. The 3750 Vrms isolation rating provides safety isolation in medical or industrial portable equipment. The small SOIC-W package is suitable for space-constrained designs. The enable function can be used to power down the isolator when not in use, further reducing power consumption. This makes the ADUM1442ARWZ-RL7 an excellent choice for portable instrumentation, wearable devices, and remote sensors.
Recommended
Medical Device Isolation
The ADUM1442ARWZ-RL7 provides the galvanic isolation required for medical devices to ensure patient safety. Its 3750 Vrms isolation rating meets the requirements for many medical applications, and the low power consumption is beneficial for battery-operated devices. The high CMTI ensures reliable operation in the presence of electrosurgical equipment and other sources of interference. The wide operating temperature range allows use in a variety of medical environments. The device is RoHS compliant and lead-free, meeting environmental standards. When designing medical devices, it is important to ensure that the isolation barrier meets the appropriate safety standards, such as IEC 60601. The ADUM1442ARWZ-RL7, with its robust isolation and low power, is a suitable choice for patient monitoring, diagnostic equipment, and portable medical devices.
Recommended
General-Purpose Digital Isolation
The ADUM1442ARWZ-RL7 is a versatile digital isolator suitable for a wide range of general-purpose isolation applications. It can be used to isolate GPIO signals, control signals, and low-speed data lines. Its 2 Mbps data rate and 2/2 channel configuration make it flexible for various signal routing needs. The micropower operation is a key advantage in systems where multiple isolators are used, as it reduces overall power consumption. The 3750 Vrms isolation rating provides robust protection against voltage transients and ground potential differences. The device is available in a standard SOIC-W package, making it easy to integrate into existing designs. The enable function allows for power management and bus isolation. This makes the ADUM1442ARWZ-RL7 a go-to choice for designers needing reliable, low-power isolation in a compact form factor.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1442ARWZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1442ARSZ-RL7 | ADUM1442ARQZ-RL7 | ADUM1441ARWZ-RL7 |
|---|---|---|---|---|
| Package | 20-SOIC-W (RW-20) | 20-SSOP | 16-SSOP | 20-SOIC-W |
| Isolation Rating | 3750 Vrms | 3750 Vrms | 2500 Vrms | 3750 Vrms |
| Data Rate | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps |
| Channel Configuration | 2/2 | 2/2 | 2/2 | 1/3 |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Supply Current (per channel) | 0.6 mA | 0.6 mA | 0.6 mA | 0.6 mA |
| Propagation Delay | 23 ns | 23 ns | 23 ns | 23 ns |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
Key Differentiators
- Micropower operation with 0.6 mA per channel supply current (vs ADUM1442ARSZ-RL7)
- Higher isolation rating of 3750 Vrms compared to 2500 Vrms of ADUM1442ARQZ-RL7 (vs ADUM1442ARQZ-RL7)
- 2/2 channel configuration offers balanced bidirectional isolation (vs ADUM1441ARWZ-RL7)
Design Notes
Maintain a clear isolation barrier under the device. Do not route copper traces or place components under the SOIC-W package that could bridge the isolation gap. Keep the PCB area between the two sides free of any conductive material to preserve the 3750 Vrms isolation rating. Use a slot or cutout in the PCB if necessary to increase creepage distance.
Decouple both VDD1 and VDD2 with 0.1 µF ceramic capacitors placed as close as possible to the supply pins. For noisy environments, add a 10 µF bulk capacitor on each side. The micropower operation means the supply current is low, but proper decoupling is still essential to maintain signal integrity and prevent noise coupling across the isolation barrier.
Do not exceed the absolute maximum supply voltage of 3.6 V on either side. Ensure that the input signals do not exceed the supply voltage by more than 0.3 V. Also, be aware of the default output state (high) - if your system requires a low default state, consider using a different variant or adding external pull-down resistors. Verify the channel configuration (2/2) matches your signal direction requirements.
Compliance Information
RoHS compliant and lead-free per Analog Devices datasheet. AEC-Q100 not applicable as this is not an automotive-grade part.
