ADUM1446ARWZ - Micropower Quad Digital Isolator | Analog Devices
MPN: ADUM1446ARWZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.15 | $31.50 |
| 100 | $2.8 | $280.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.1 | $2,100.00 |
Drop-in alternatives for ADUM1446ARWZ — 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:
ADUM1445ARWZ
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →ADUM1447ARWZ
✅ Drop-In✓ In Stock
$5.6 / Unit
View Datasheet →ISO7741DW
✅ Drop-In📋 Reference alternative (not in catalog)
Si8641BB-B-IS1
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1446ARWZ Maximum Ratings & Electrical Characteristics
| 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 |
| Quiescent Current per Channel (ENx=0) | <10 µA |
| Quiescent Current per Channel (ENx=1) | <1 µA |
| Operating Temperature Range | -40°C to +125°C |
| Package | 16-Lead SOIC-W |
| Mounting Type | Surface Mount |
| Propagation Delay | [DATA_NEEDED: Propagation Delay] |
| Pulse Width Distortion | [DATA_NEEDED: Pulse Width Distortion] |
| RoHS Status | Compliant |
| MSL Level | [DATA_NEEDED: MSL Level] |
| Isolation Rating | 2500 Vrms |
ADUM1446ARWZ Pin Configuration
| Pin 1 | VDD1 — Supply voltage, side 1 |
| Pin 2 | GND1 — Ground, side 1 |
| Pin 3 | VIA — Input channel A, side 1 |
| Pin 4 | VIB — Input channel B, side 1 |
| Pin 5 | VIC — Input channel C, side 1 |
| Pin 6 | VID — Input channel D, side 1 |
| Pin 7 | EN1 — Enable, side 1 |
| Pin 8 | GND1 — Ground, side 1 |
| Pin 9 | GND2 — Ground, side 2 |
| Pin 10 | EN2 — Enable, side 2 |
| Pin 11 | VOD — Output channel D, side 2 |
| Pin 12 | VOC — Output channel C, side 2 |
| Pin 13 | VOB — Output channel B, side 2 |
| Pin 14 | VOA — Output channel A, side 2 |
| Pin 15 | GND2 — Ground, side 2 |
| Pin 16 | VDD2 — Supply voltage, 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
ADUM1446ARWZ is suitable for 6 applications: Industrial Fieldbus Communication, Medical Patient Monitoring, Isolated SPI Interface, Battery-Powered Sensor Nodes, Isolated Power Supply Control, Automotive Battery Management.
Industrial Fieldbus Communication
The ADUM1446ARWZ provides galvanic isolation for industrial fieldbus interfaces such as RS-485 and CAN. Its 2 Mbps data rate and 25 kV/µs CMTI ensure reliable communication in noisy factory environments. The low quiescent current (<10 µA per channel) minimizes power consumption in remote I/O modules. The 2.5 kVrms isolation protects microcontrollers from ground loops and voltage transients. When used with a transceiver like the ADM2483, it enables robust, isolated communication links.
Recommended
Medical Patient Monitoring
In medical devices, the ADUM1446ARWZ isolates sensitive patient-connected sensors from the main control unit, ensuring safety and signal integrity. Its 2.5 kVrms isolation meets medical safety standards, while the low power consumption extends battery life in portable monitors. The wide operating temperature range (-40°C to +125°C) supports reliable operation in clinical environments. The device's high CMTI prevents false triggering from defibrillator pulses or electrosurgical equipment.
Recommended
Isolated SPI Interface
The ADUM1446ARWZ is ideal for isolating SPI buses between microcontrollers and peripheral devices such as ADCs and DACs. Its 2 Mbps data rate supports common SPI clock frequencies, and the four channels can be configured for MOSI, MISO, SCK, and CS signals. The low propagation delay ensures minimal timing skew, and the enable pins allow power saving when the SPI bus is idle. This isolation prevents ground loops and noise from corrupting sensitive analog measurements.
Recommended
Battery-Powered Sensor Nodes
For wireless sensor nodes, the ADUM1446ARWZ provides isolation with minimal power drain. Its quiescent current of less than 1 µA per channel (with refresh disabled) is critical for extending battery life. The device can isolate digital sensors, wake-up signals, and communication interfaces while maintaining a small footprint. The 3.0 V to 3.6 V supply range is compatible with Li-ion batteries and energy harvesting circuits.
Recommended
Isolated Power Supply Control
The ADUM1446ARWZ can be used to isolate control signals in power supply designs, such as feedback loops and enable signals. Its high CMTI ensures stable operation in the presence of switching noise. The low power consumption reduces the burden on the isolated side's power supply. The device's four channels can carry PWM signals, fault indicators, and control commands across the isolation barrier.
Recommended
Automotive Battery Management
In automotive battery management systems, the ADUM1446ARWZ isolates cell monitoring circuits from the main controller. Its 2.5 kVrms isolation and wide temperature range meet automotive requirements. The low power consumption is beneficial for always-on monitoring. The device's high CMTI ensures reliable communication in the presence of motor noise and load transients.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1446ARWZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1446ARQZ | ADUM1446ARSZ | ADUM1445ARWZ | ADUM1447ARWZ | ISO7741DW | Si8641BB-B-IS1 |
|---|---|---|---|---|---|---|---|
| Package | 16-Lead SOIC-W | 16-SSOP | 20-SSOP | 16-Lead SOIC-W | 16-Lead SOIC-W | 16-SOIC | 16-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Skyworks Solutions |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 3750 Vrms | 2500 Vrms | 2500 Vrms | 5000 Vrms | 2500 Vrms |
| Data Rate | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 100 Mbps | 150 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs | 35 kV/µs |
| Quiescent Current per Channel | <10 µA (ENx=0), <1 µA (ENx=1) | <10 µA (ENx=0), <1 µA (ENx=1) | <10 µA (ENx=0), <1 µA (ENx=1) | <10 µA (ENx=0), <1 µA (ENx=1) | <10 µA (ENx=0), <1 µA (ENx=1) | 1.5 mA per channel | 1.6 mA per channel |
| 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 | 3.0 V to 3.6 V | 2.25 V to 5.5 V | 2.5 V to 5.5 V |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -55°C to +125°C | -40°C to +125°C |
Key Differentiators
- Ultra-low power consumption (vs ISO7741DW)
- Micropower operation with enable pins (vs Si8641BB-B-IS1)
- Same-package drop-in alternatives (vs ADUM1446ARQZ)
Design Notes
For optimal performance, place bypass capacitors (0.1 µF and 10 µF) close to the VDD1 and VDD2 pins. Ensure a solid ground plane on both sides of the isolation barrier. Maintain adequate creepage and clearance distances (at least 4 mm for 2500 Vrms) between the isolated sides to meet safety standards.
The ADUM1446ARWZ consumes very low power, but the supply voltage must be within 3.0 V to 3.6 V. Use low-dropout regulators (LDOs) to provide clean power. If the internal refresh is disabled (ENx=1), the quiescent current drops to <1 µA per channel, which is beneficial for battery-powered designs.
Do not exceed the absolute maximum ratings for supply voltage or input/output voltages. Ensure that the enable pins (EN1, EN2) are properly configured to avoid unintended shutdown. When using the device in high-noise environments, consider adding ferrite beads on the power supply lines to reduce EMI.
Compliance Information
RoHS compliant per Analog Devices product page. Other compliance data not specified in the provided data.
