Overview
The ADUM3472ARSZ is a quad-channel digital isolator with an integrated PWM controller and transformer driver, designed by Analog Devices Inc. This component utilizes the iCoupler® technology to provide a compact, high-efficiency solution for isolated power and signal isolation. It is part of the ADUM3470/ADUM3471/ADUM3472/ADUM3473/ADUM3474 family, offering a regulated, adjustable output voltage from 3.3 V to 24 V and up to 2 W of isolated power.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Isolated Output Voltage (VISO) | 3.0 | 3.3 | 3.6 | V | IISO = 0 mA, VISO = VFB × (R1 + R2)/R2 |
| Feedback Voltage Setpoint (VFB) | 1.125 | 1.25 | 1.375 | V | IISO = 0 mA |
| Line Regulation (VISO (LINE)) | 1 | 10 | mV/V | IISO = 50 mA | |
| Switching Frequency (fSW) | 200 kHz | 1 MHz | Adjustable oscillator frequency | ||
| Output Power | 2 W | ||||
| Efficiency at Maximum Output Supply Current | 70% | IISO = 400 mA, VISO = 5.0 V | |||
| Signal Isolation Channels | Quad dc-to-25 Mbps (NRZ) | ||||
| Package Type | 20-lead SSOP | ||||
| Maximum Operating Temperature | 105°C |
Key Features
- Isolated PWM controller with integrated transformer driver.
- Regulated adjustable output: 3.3 V to 24 V.
- Up to 2 W of isolated power.
- Quad dc-to-25 Mbps (NRZ) signal isolation channels.
- High temperature operation: up to 105°C.
- High common-mode transient immunity: >25 kV/µs.
- Adjustable oscillator frequency: 200 kHz to 1 MHz.
- Soft start function at power-up.
- Pulse-by-pulse overcurrent protection and thermal shutdown.
- Safety and regulatory approvals: UL recognition, CSA Component Acceptance Notice, VDE certificate of conformity.
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 interfaces (CAN, Audio, Ethernet).
Q & A
- What is the ADUM3472ARSZ used for? The ADUM3472ARSZ is used for providing isolated power and signal isolation in various applications, including industrial, automotive, and process control systems.
- What is the output power of the ADUM3472ARSZ? The ADUM3472ARSZ can provide up to 2 W of isolated power.
- What are the output voltage ranges of the ADUM3472ARSZ? The output voltage can be adjusted from 3.3 V to 24 V.
- What is the efficiency of the ADUM3472ARSZ at maximum output supply current? The efficiency is 70% at a guaranteed load of 400 mA at 5.0 V output.
- What are the signal isolation channels of the ADUM3472ARSZ? The ADUM3472ARSZ has quad dc-to-25 Mbps (NRZ) signal isolation channels.
- What is the maximum operating temperature of the ADUM3472ARSZ? The maximum operating temperature is 105°C.
- Does the ADUM3472ARSZ have any safety and regulatory approvals? Yes, it has UL recognition, CSA Component Acceptance Notice, and VDE certificate of conformity.
- What is the package type of the ADUM3472ARSZ? The package type is a 20-lead SSOP.
- Does the ADUM3472ARSZ support soft start and overcurrent protection? Yes, it includes a soft start function at power-up and pulse-by-pulse overcurrent protection.
- What are some common applications of the ADUM3472ARSZ? Common applications include RS-232/RS-422/RS-485 transceivers, industrial field bus isolation, power supply start-up bias, and isolated sensor interfaces.
