This document introduces the 'Circuits from the Lab' designed and built by Analog Devices engineers, emphasizing the user's responsibility for testing and determining the circuit's suitability and applicability. It also provides the features and characteristics of the ADuM4160 Full-Speed/Low-Speed USB Isolator and ADP3338 High-Precision Low Dropout Regulator.
This document presents a reference circuit for a USB peripheral isolator designed to provide medical-grade isolation for industrial and medical applications. The circuit utilizes the ADuM4160 full-speed/low-speed USB isolator to buffer signals between the host and the peripheral device, addressing challenges in connecting devices to machines with dangerous voltages or requiring low-leakage connections.
The design includes a downstream power supply section using the ADP3338 low-dropout regulator to generate a 5V output from a wall adapter, ensuring low voltage differential requirements. The note details the circuit's functionality, advantages, design considerations regarding speed and power configuration, and provides test data demonstrating full-speed signal integrity and eye diagrams. This manual is written in Chinese.
| Isolator Type | ADuM4160 Full-Speed/Low-Speed USB Isolator |
|---|---|
| Regulator Output | 5V |
| Regulator Current | 1 A |
| Regulator Package | SOT-223 |
| Supported Speeds | Full-Speed (12 Mbps) and Low-Speed (1.5 Mbps) |
The circuit supports full-speed (12 Mbps) and low-speed (1.5 Mbps) signal rates.