ADUM1440ARWZ-RL7 - 4-Ch Digital Isolator 2Mbps | Analog Devices
MPN: ADUM1440ARWZ-RL7 ✓ 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 ADUM1440ARWZ-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:
ADUM1441ARWZ-RL7
✅ Drop-In✓ In Stock
$2.2 / Unit
View Datasheet →ADUM1442ARWZ-RL7
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$2.48 / Unit
View Datasheet →ADUM1445ARWZ-RL7
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$2.25 / Unit
View Datasheet →ADUM1446ARWZ-RL7
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$2.22 / Unit
View Datasheet →ADUM1447ARWZ-RL7
✅ Drop-In✓ In Stock
$5.5 / Unit
View Datasheet →ADUM1400ARWZ
⚡ Same Package📋 Reference alternative (not in catalog)
ADUM1440ARWZ-RL7 Maximum Ratings & Electrical Characteristics
| Number of Channels | 4 |
| Channel Directionality | 4/0 (all forward) |
| Default Output State | High |
| Isolation Voltage | 2500 Vrms |
| Data Rate | 2 Mbps |
| CMTI | 25 kV/µs |
| Supply Voltage (VDD1/VDD2) | 2.25 V to 3.6 V |
| Supply Current per Channel | 0.6 mA typical at 2 Mbps |
| Propagation Delay | [DATA_NEEDED: propagation delay] |
| Pulse Width Distortion | [DATA_NEEDED: pulse width distortion] |
| Operating Temperature Range | -40°C to +125°C |
| Package | 16-SOIC-W (0.300" width) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Technology | iCoupler |
ADUM1440ARWZ-RL7 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 | VIB — Input channel B |
| Pin 5 | VIC — Input channel C |
| Pin 6 | VID — Input channel D |
| Pin 7 | GND1 — Ground for side 1 |
| Pin 8 | NC — No connect |
| Pin 9 | VOD — Output channel D |
| Pin 10 | VOC — Output channel C |
| Pin 11 | VOB — Output channel B |
| Pin 12 | VOA — Output channel A |
| Pin 13 | GND2 — Ground for side 2 |
| Pin 14 | NC — No connect |
| Pin 15 | VDD2 — Supply voltage for side 2 |
| Pin 16 | GND2 — Ground 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
ADUM1440ARWZ-RL7 is suitable for 6 applications: Industrial Fieldbus Communication, Isolated SPI Interface, Medical Patient Monitoring, Power Supply Control, Battery-Powered IoT Devices, Automotive Electronics.
Industrial Fieldbus Communication
The ADUM1440ARWZ-RL7 is ideal for industrial fieldbus systems such as RS-485, CAN, and Profibus, where galvanic isolation is required to protect against ground loops and voltage transients. Its 2500 Vrms isolation and 25 kV/µs CMTI ensure reliable data transmission in noisy factory environments. The 2 Mbps data rate is sufficient for most fieldbus protocols, and the low power consumption reduces heat in enclosed control cabinets. The default high output state provides a defined logic level during power-up, preventing spurious signals on the bus.
Recommended
Isolated SPI Interface
The ADUM1440ARWZ-RL7 provides four channels, making it suitable for isolating SPI signals (SCLK, MOSI, MISO, CS) between a microcontroller and peripheral devices. The 2 Mbps data rate supports standard SPI speeds, and the default high output state is beneficial for chip-select lines. The low power consumption is advantageous in battery-powered sensors. The 2500 Vrms isolation protects sensitive digital logic from high-voltage transients in industrial or medical environments. Proper PCB layout with adequate creepage is essential to maintain isolation.
Recommended
Medical Patient Monitoring
In medical devices such as patient monitors and ECG machines, the ADUM1440ARWZ-RL7 provides galvanic isolation to protect patients from electric shock. Its 2500 Vrms isolation meets basic safety requirements, and the low power consumption is ideal for portable devices. The 2 Mbps data rate is sufficient for transmitting biosignals, and the default high output state ensures safe operation during power-up. The wide temperature range of -40°C to +125°C allows use in various clinical environments. The iCoupler technology offers higher reliability than optocouplers.
Recommended
Power Supply Control
The ADUM1440ARWZ-RL7 is used to isolate control signals in power supply systems, such as digital power controllers and isolated DC-DC converters. It transmits PWM signals across the isolation barrier with a data rate of 2 Mbps, sufficient for most switching frequencies. The high CMTI of 25 kV/µs ensures stable operation in the presence of fast voltage transients from switching nodes. The low power consumption reduces the load on the auxiliary supply. The default high output state prevents unintended turn-on of power switches during power-up.
Recommended
Battery-Powered IoT Devices
The ADUM1440ARWZ-RL7 is ideal for IoT devices that require isolation between sensor nodes and communication modules. Its micropower consumption (0.6 mA per channel) extends battery life, and the 2.25V to 3.6V supply range is compatible with common battery voltages. The 2 Mbps data rate supports sensor data transmission, and the 2500 Vrms isolation protects against ESD and ground potential differences. The small SOIC-W package is suitable for compact designs. The default high output state ensures reliable operation during power-up.
Recommended
Automotive Electronics
The ADUM1440ARWZ-RL7 is suitable for automotive applications such as battery management systems and motor control, where isolation is required between high-voltage and low-voltage domains. Its 2500 Vrms isolation and 25 kV/µs CMTI handle the harsh electrical environment of vehicles. The wide temperature range of -40°C to +125°C meets automotive requirements. The low power consumption reduces load on the vehicle's electrical system. The default high output state ensures safe operation during power-up. However, for AEC-Q100 qualified parts, consider the ADUM1440ARWZ-RL7 is not qualified; use ADUM1440ARQZ-RL7 for non-automotive.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1440ARWZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1440ARQZ-RL7 | ADUM1441ARWZ-RL7 | ADUM1442ARWZ-RL7 | ADUM1445ARWZ-RL7 | ADUM1446ARWZ-RL7 | ADUM1447ARWZ-RL7 | ADUM1400ARWZ | ADUM1201ARZ |
|---|---|---|---|---|---|---|---|---|---|
| Package | 16-SOIC-W | 16-SSOP | 16-SOIC-W | 16-SOIC-W | 16-SOIC-W | 16-SOIC-W | 16-SOIC-W | 16-SOIC-W | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 2 |
| Channel Directionality | 4/0 | 4/0 | 3/1 | 2/2 | 4/0 | 3/1 | 2/2 | 4/0 | 1/1 |
| Default Output State | High | High | High | High | Low | Low | Low | High | High |
| Data Rate | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 90 Mbps | 1 Mbps |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
Key Differentiators
- Micropower consumption (vs ADUM1400ARWZ)
- Default high output state (vs ADUM1445ARWZ-RL7)
- 4/0 channel directionality (vs ADUM1441ARWZ-RL7)
Design Notes
For the ADUM1440ARWZ-RL7, ensure proper PCB layout to maintain the isolation rating. Provide adequate creepage and clearance distances between the two sides of the isolation barrier, typically at least 8 mm for 2500 Vrms. Place a 0.1 µF decoupling capacitor close to each VDD pin (VDD1 and VDD2) to minimize supply noise. Use a solid ground plane on each side, but do not connect the two ground planes together except through the isolation barrier.
The ADUM1440ARWZ-RL7 operates from 2.25V to 3.6V supplies. Ensure that both VDD1 and VDD2 are within this range and have sufficient current capability. The typical supply current is 0.6 mA per channel at 2 Mbps, so for 4 channels, the total current is about 2.4 mA per side. Use low-dropout regulators if the supply is noisy. The device has no enable pin, so power sequencing is not required, but ensure both supplies are stable before applying signals.
A common pitfall is exceeding the absolute maximum ratings, such as input voltage on VIA-VID or output current on VOA-VOD. Do not apply voltages outside the supply range to the input pins. Also, avoid exceeding the data rate of 2 Mbps, as this can cause timing errors. The default high output state means that if the input side is unpowered, the outputs will be high, which may be unexpected in some designs. Ensure that the system can handle this state during power-up or fault conditions.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. REACH and conflict minerals status not specified in the provided data.
