Overview
The ADUM3470ARSZ is a digital isolator produced by Analog Devices Inc., incorporating advanced iCoupler® technology. This component integrates a PWM controller and a transformer driver to provide an isolated dc-to-dc converter. It is designed to offer up to 2 W of regulated, isolated power with output voltages adjustable from 3.3 V to 24 V. The device is packaged in a 20-lead SSOP and is known for its high efficiency, high temperature operation, and robust isolation capabilities.
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 | |
| Output Power | 2 W | ||||
| Efficiency | 70% | At guaranteed load of 400 mA at 5.0 V output | |||
| Oscillator Frequency | 200 kHz | 1 MHz | Adjustable | ||
| Logic High Input Threshold (VIH) | 1.6 | V | |||
| Logic Low Input Threshold (VIL) | 0.4 | V | |||
| Maximum Operating Temperature | 105°C |
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.
- 20-lead SSOP package.
- 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 primary function of the ADUM3470ARSZ?
The ADUM3470ARSZ is a digital isolator that integrates a PWM controller and a transformer driver to provide an isolated dc-to-dc converter.
- What are the output voltage ranges of the ADUM3470ARSZ?
The output voltage is adjustable from 3.3 V to 24 V.
- What is the maximum output power of the ADUM3470ARSZ?
The maximum output power is up to 2 W.
- What is the efficiency of the ADUM3470ARSZ at a guaranteed load?
The efficiency is 70% at a guaranteed load of 400 mA at 5.0 V output.
- What is the maximum operating temperature of the ADUM3470ARSZ?
The maximum operating temperature is 105°C.
- What safety and regulatory approvals does the ADUM3470ARSZ have?
The device has UL recognition, CSA Component Acceptance Notice, and VDE certificate of conformity.
- What are some common applications of the ADUM3470ARSZ?
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, process controls, and automotive interfaces.
- What is the package type of the ADUM3470ARSZ?
The device is packaged in a 20-lead SSOP.
- Does the ADUM3470ARSZ have overcurrent protection?
Yes, it has pulse-by-pulse overcurrent protection and thermal shutdown.
- What is the common-mode transient immunity of the ADUM3470ARSZ?
The common-mode transient immunity is >25 kV/µs.
