ADUM1446ARWZ-RL7 - 4-Ch Digital Isolator 2Mbps | Analog Devices
MPN: ADUM1446ARWZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.47 | $1,235.00 |
| 1,000 | $2.22 | $2,220.00 |
ADUM1446ARWZ-RL7 Overview
Digital isolators are components that transfer digital signals across an isolation barrier, providing galvanic isolation to protect circuits and users from high voltages, ground loops, and noise. They are essential in industrial automation, medical equipment, and communication systems where safety and signal integrity are critical. The ADUM1446 is part of the ADUM144x family, which includes various channel configurations and data rates, all sharing the same iCoupler core technology.
Key features of the ADUM1446ARWZ-RL7 include its low power consumption, making it suitable for battery-powered and energy-efficient designs. It operates over a wide supply voltage range of 3.0V to 3.6V on both sides, with a temperature range of -40°C to +125°C. The device supports 4 unidirectional channels with a default output state that can be configured. Its high CMTI of 25kV/µs ensures reliable operation in noisy environments.
The ADUM1446 uses iCoupler technology, which integrates micro-transformers on a CMOS die, providing a robust and reliable isolation barrier. This architecture offers advantages over optocouplers, including higher data rates, lower power consumption, and better timing accuracy. The device also features a refresh mechanism to maintain output states even when input signals are absent, ensuring fail-safe operation.
Typical applications include industrial fieldbus isolation, SPI isolation, and isolated data acquisition systems. Its low power and high CMTI make it ideal for use in motor control, power inverters, and medical monitoring equipment. The wide temperature range and small package footprint enable compact and reliable designs.
When designing with this device, ensure proper PCB layout with adequate creepage and clearance distances for the required isolation rating. Also, place decoupling capacitors close to the VDD1 and VDD2 pins to minimize noise and ensure stable operation.
Drop-in alternatives for ADUM1446ARWZ-RL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADUM1446ARWZ-RL7 (same form factor and footprint) — differing in Package, Supply Voltage (VDD1/VDD2), Isolation Voltage, Default Output State, Channel Directionality.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM1446ARWZ
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →ADUM1445ARWZ-RL7
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.25 / Unit
View Datasheet →ADUM1447ARWZ-RL7
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.5 / Unit
View Datasheet →ADUM1441ARWZ-RL7
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.2 / Unit
View Datasheet →ADUM1440ARWZ-RL7
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.1 / Unit
View Datasheet →ADUM1446ARWZ-RL7 Specifications
| Number of Channels | 4 |
| Isolation Voltage | 2500 Vrms |
| Data Rate | 2 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Supply Voltage (VDD1/VDD2) | 3.0 V to 3.6 V |
| Operating Temperature Range | -40°C to +125°C |
| Package | 16-Lead SOIC-W (RW-16) |
| Mounting Type | Surface Mount |
| Output Type | CMOS |
| Direction Configuration | 4 unidirectional channels |
| RoHS Status | Compliant |
ADUM1446ARWZ-RL7 Pin Configuration
| Pin 1 | VDD1 — Supply voltage for side 1 |
| Pin 2 | GND1 — Ground for side 1 |
| Pin 3 | VIA — Input channel A on side 1 |
| Pin 4 | VIB — Input channel B on side 1 |
| Pin 5 | VIC — Input channel C on side 1 |
| Pin 6 | VID — Input channel D on side 1 |
| Pin 7 | NC — No connect |
| Pin 8 | GND1 — Ground for side 1 |
| Pin 9 | GND2 — Ground for side 2 |
| Pin 10 | VOD — Output channel D on side 2 |
| Pin 11 | VOC — Output channel C on side 2 |
| Pin 12 | VOB — Output channel B on side 2 |
| Pin 13 | VOA — Output channel A on side 2 |
| Pin 14 | NC — No connect |
| Pin 15 | GND2 — Ground for side 2 |
| Pin 16 | VDD2 — Supply voltage for side 2 |
Typical Applications
ADUM1446ARWZ-RL7 is suitable for 6 applications: Industrial Fieldbus Isolation, SPI Isolation, Isolated Data Acquisition, Motor Control, Medical Monitoring Equipment, Power Inverter.
Industrial Fieldbus Isolation
The ADUM1446ARWZ-RL7 provides galvanic isolation for industrial fieldbus interfaces such as RS-485, CAN, and PROFIBUS. Its 2500Vrms isolation and 25kV/µs CMTI ensure reliable communication in noisy industrial environments, protecting microcontrollers and sensors from ground loops and voltage transients. The 2Mbps data rate is sufficient for most fieldbus protocols, and the low power consumption is beneficial for bus-powered nodes. The wide temperature range of -40°C to +125°C allows operation in harsh industrial settings. When used with a transceiver like the ADM2483, it enables a complete isolated RS-485 interface with high noise immunity.
Recommended
SPI Isolation
The ADUM1446ARWZ-RL7 is ideal for isolating SPI buses between microcontrollers and peripheral devices such as ADCs, DACs, and sensors. With 4 channels, it can isolate SCLK, MOSI, MISO, and CS signals in a single package. The 2Mbps data rate supports standard SPI speeds up to 2MHz, and the low propagation delay ensures minimal timing skew. The device's high CMTI prevents data corruption in electrically noisy environments, such as motor drives or power converters. Its small SOIC-W package saves board space, and the wide temperature range makes it suitable for industrial and automotive applications. For higher-speed SPI, consider the ADUM1446 with a higher data rate variant or other isolators.
Recommended
Isolated Data Acquisition
In data acquisition systems, the ADUM1446ARWZ-RL7 provides isolation between the analog front-end and the digital processing unit, preventing ground loops and reducing noise. Its 4 channels can carry data, clock, and control signals, while the 2500Vrms isolation protects sensitive electronics from high-voltage transients. The low power consumption is advantageous for portable or battery-powered data loggers. The device's high CMTI ensures accurate data transfer in industrial environments with fast-switching power electronics. The wide temperature range allows deployment in outdoor or extreme environments. When combined with precision ADCs like the AD7175-8, it enables robust isolated measurement systems.
Recommended
Motor Control
The ADUM1446ARWZ-RL7 is used in motor control systems to isolate the low-voltage control circuitry from the high-voltage power stage. Its 2500Vrms isolation and 25kV/µs CMTI are critical for withstanding the fast voltage transients generated by IGBTs or MOSFETs. The 4 channels can carry PWM signals, fault feedback, and enable signals. The 2Mbps data rate is sufficient for PWM frequencies up to several hundred kHz. The wide temperature range of -40°C to +125°C ensures reliable operation in motor drives, which often experience high ambient temperatures. The low power consumption reduces heat generation, and the SOIC-W package is compact for space-constrained designs.
Recommended
Medical Monitoring Equipment
The ADUM1446ARWZ-RL7 provides galvanic isolation in medical monitoring devices, ensuring patient safety by isolating low-voltage sensing circuits from the mains-connected power supply. Its 2500Vrms isolation meets basic isolation requirements for many medical applications. The low power consumption is ideal for battery-operated portable monitors. The high CMTI prevents interference from electrosurgical equipment or other high-noise sources. The wide temperature range allows use in various clinical environments. The device's small package enables compact designs for wearable or handheld monitors. When used with precision analog front-ends like the AD8233, it enables safe and reliable patient monitoring.
Recommended
Power Inverter
In power inverters, the ADUM1446ARWZ-RL7 isolates the control signals from the high-voltage DC bus and the switching stage. Its 2500Vrms isolation and 25kV/µs CMTI are essential for reliable operation in the presence of high dv/dt transients. The 4 channels can transmit gate drive signals, current sense feedback, and fault signals. The 2Mbps data rate is adequate for control loops with moderate bandwidth. The wide temperature range of -40°C to +125°C ensures operation in the harsh thermal environment of power electronics. The low power consumption minimizes heat dissipation, and the SOIC-W package is suitable for PCB mounting in compact inverter designs.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1446ARWZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1446ARWZ | ADUM1446ARSZ-RL7 | ADUM1446ARQZ-RL7 | ADUM1445ARWZ-RL7 |
|---|---|---|---|---|---|
| Package | 16-Lead SOIC-W (RW-16) | 16-Lead SOIC-W (RW-16) | 16-Lead SOIC-N (RS-16) | 16-Lead SSOP (RQ-16) | 16-Lead SOIC-W (RW-16) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Data Rate | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Supply Voltage Range | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V |
| Number of Channels | 4 | 4 | 4 | 4 | 4 |
| Channel Direction | 4/0 (all inputs on side 1) | 4/0 | 4/0 | 4/0 | 3/1 |
Key Differentiators
- Micropower consumption (vs ADUM1446ARSZ-RL7)
- Wide-body SOIC package (vs ADUM1446ARQZ-RL7)
- 4/0 channel direction (vs ADUM1445ARWZ-RL7)
Design Notes
For proper isolation, ensure adequate creepage and clearance distances on the PCB. The SOIC-W package provides a minimum creepage of 8mm, which is suitable for 2500Vrms isolation. Maintain at least 8mm spacing between the high-voltage and low-voltage sides, and avoid placing copper traces or planes under the isolator to prevent reducing the isolation distance.
Decouple both VDD1 and VDD2 with 0.1µF ceramic capacitors placed as close as possible to the pins. Additionally, use a 10µF bulk capacitor on each supply if the power source is far from the device. This ensures stable operation and reduces noise coupling across the isolation barrier.
Do not exceed the absolute maximum supply voltage of 3.6V on VDD1 or VDD2. Also, ensure that the input signals do not exceed the supply voltage. The default output state is determined by the input state and the refresh mechanism; if inputs are left floating, the outputs may be undefined. Use pull-up or pull-down resistors as needed.
Compliance Information
RoHS compliant per part number 'Z' suffix. Other compliance data not specified in provided sources.
