Overview
The ADUM3472ARSZ-RL7, produced by Analog Devices Inc., is a quad-channel digital isolator that integrates a PWM controller and a transformer driver for an isolated dc-to-dc converter. This device utilizes Analog Devices' iCoupler® technology to provide up to 2 W of regulated, isolated power from a 5.0 V or 3.3 V input supply. It eliminates the need for a separate isolated dc-to-dc converter in 2 W isolated designs, offering a compact and efficient solution.
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 | ROC = 50 kΩ to 270 kΩ | ||
| Switch On Resistance (RON) | 0.5 | Ω | |||
| Undervoltage Lockout Thresholds (VUV+ and VUV-) | 2.6 | 2.8 | V | Positive and negative going thresholds | |
| Hysteresis (VUVH) | 0.2 | V | |||
| Maximum Output Supply Current (IISO MAX) | 400 mA | VISO = 5.0 V | |||
| Efficiency at Maximum Output Supply Current | 70% | IISO = IISO (MAX) | |||
| Operating Temperature Range | -40°C | 105°C | |||
| Package Type | 20-SSOP | 0.209" (5.30mm) Width |
Key Features
- Integrated PWM controller and transformer driver for isolated dc-to-dc converter.
- Regulated adjustable output: 3.3 V to 24 V.
- Up to 2 W output power.
- 70% efficiency at guaranteed load of 400 mA at 5.0 V output.
- 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 #5A, 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 primary function of the ADUM3472ARSZ-RL7? The ADUM3472ARSZ-RL7 is a quad-channel digital isolator with an integrated PWM controller and transformer driver for an isolated dc-to-dc converter.
- What is the output power range of the ADUM3472ARSZ-RL7? The device provides up to 2 W of regulated, isolated power.
- What are the input voltage options for the ADUM3472ARSZ-RL7? The device can operate from a 5.0 V or 3.3 V input supply.
- What is the operating temperature range of the ADUM3472ARSZ-RL7? The operating temperature range is from -40°C to 105°C.
- What safety and regulatory approvals does the ADUM3472ARSZ-RL7 have? It has UL recognition, CSA Component Acceptance Notice #5A, and VDE certificate of conformity.
- What are the key applications of the ADUM3472ARSZ-RL7? Key applications include RS-232/RS-422/RS-485 transceivers, industrial field bus isolation, power supply start-up bias and gate drives, isolated sensor interfaces, process controls, and automotive interfaces.
- What is the efficiency of the ADUM3472ARSZ-RL7 at maximum output supply current? The efficiency is 70% at a guaranteed load of 400 mA at 5.0 V output.
- What is the common-mode transient immunity of the ADUM3472ARSZ-RL7? The device has a high common-mode transient immunity of >25 kV/µs.
- Does the ADUM3472ARSZ-RL7 have overcurrent protection? Yes, it features pulse-by-pulse overcurrent protection and thermal shutdown.
- What is the package type of the ADUM3472ARSZ-RL7? The device is packaged in a 20-SSOP (0.209" or 5.30mm width).
