Overview
The ADUM3471ARSZ-RL7 is a quad-channel digital isolator produced by Analog Devices Inc. This component integrates a PWM controller and a transformer driver, designed to provide isolated DC-to-DC conversion. It utilizes Analog Devices' iCoupler chip scale transformer technology to isolate logic signals and achieve high efficiency in isolated DC-to-DC conversion. This solution eliminates the need for a separate isolated DC-to-DC converter in 2W isolated designs, offering a compact and efficient total isolation solution.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| Data Rate | - | 1 Mbps | - | - | Minimum data rate |
| Isolated Output Voltage | 3.0 | 3.3 | 3.6 | V | IISO = 0 mA, VISO = VFB × (R1 + R2)/R2 |
| Output Current | - | - | 400 mA | - | Maximum output current at 5.0 V output |
| Switching Frequency | - | 1000 kHz | - | - | Typical switching frequency |
| Propagation Delay | - | 100 ns | - | - | Maximum propagation delay |
| Pulse Width Distortion | - | 40 ns | - | - | Maximum pulse width distortion |
| Operating Temperature | -40 | - | 105 | °C | Temperature rating range |
| Package Type | - | - | - | 20-lead SSOP | Package type |
| Safety and Regulatory Approvals | - | - | - | - | UL recognition: 2500 V rms for 1 minute per UL 1577, CSA Component Acceptance Notice #5A, VDE certificate of conformity |
Key Features
- Integrated PWM controller and transformer driver for isolated DC-to-DC conversion, providing up to 2 W of regulated, isolated power at 3.3 V to 24 V from a 5.0 V input supply
- Quad-channel digital isolator with iCoupler chip scale transformer technology for logic signal isolation
- 70% efficiency at a guaranteed load of 400 mA at 5.0 V output
- Pulse-by-pulse overcurrent protection and thermal shutdown
- Soft start function at power-up
- High common-mode transient immunity: >25 kV/µs
- 200 kHz to 1 MHz adjustable oscillator frequency
- 20-lead SSOP package
Applications
- RS-232/RS-422/RS-485 transceivers
- Industrial field bus isolation
- Power supply start-up bias and gate drives
- Isolated sensor interfaces
- Process controls
- Automotive applications
Q & A
- What is the primary function of the ADUM3471ARSZ-RL7?
The ADUM3471ARSZ-RL7 is a quad-channel digital isolator with an integrated PWM controller and transformer driver for isolated DC-to-DC conversion.
- What is the maximum data rate supported by the ADUM3471ARSZ-RL7?
The maximum data rate supported is 1 Mbps.
- What is the typical efficiency of the isolated DC-to-DC converter?
The typical efficiency is 70% at a guaranteed load of 400 mA at 5.0 V output.
- What are the safety and regulatory approvals for this component?
It has UL recognition: 2500 V rms for 1 minute per UL 1577, CSA Component Acceptance Notice #5A, and VDE certificate of conformity.
- What is the operating temperature range of the ADUM3471ARSZ-RL7?
The operating temperature range is from -40°C to 105°C.
- What type of package does the ADUM3471ARSZ-RL7 come in?
The component comes in a 20-lead SSOP package.
- What are some common applications for the ADUM3471ARSZ-RL7?
Common applications include RS-232/RS-422/RS-485 transceivers, industrial field bus isolation, power supply start-up bias and gate drives, isolated sensor interfaces, and process controls.
- Does the ADUM3471ARSZ-RL7 have overcurrent protection?
Yes, it has pulse-by-pulse overcurrent protection and thermal shutdown.
- What is the maximum output current of the ADUM3471ARSZ-RL7?
The maximum output current is 400 mA at 5.0 V output.
- Is the ADUM3471ARSZ-RL7 suitable for automotive applications?
Yes, it is qualified for automotive applications.
