Digital isolators secure signal transmission up to 150Mbps

Würth Elektronik has introduced its new product family: SMT digital isolators with and without integrated power supply. The components are employed for galvanic isolation to transmit digital signals, therefore, avoiding differences in potential and protecting people and sensitive circuits from high voltages. The new components are pin-compatible with other most common digital isolators on the market and can attain higher transmission rates of up to 150Mbps and special interference immunity.

Digital isolators are ideal if fast and robust signal isolation is required. Besides their appropriateness for high-speed applications with a data rate up to 150Mbps, the high-quality isolators with UL 1577 approval also provide high immunity to system noise with CMTI of ±150kV/µs. Application areas include isolating communication buses, industrial switch-mode power supplies and motor controllers, testing and measuring systems, battery management systems and photovoltaic inverters.

Under the product name WPME-CDIS (Capacitive Digital Isolator Standard), the online catalogue comprises isolators in SOIC-8NB (4.9mm x 3.9mm x 1.5mm) and SOIC-16WB (10.3mm x 7.5mm x 2.5mm) designs with different two and four-channel configurations with default output high or low. Data rates up to 150Mbps are supported. The respective minimum and maximum limit values apply to the recommended ambient temperature range of -40C to 125C. The isolation voltage is 3.75kVRMS for the two-channel models and 5kVRMS for the four-channel models.

WPME-CDIP (Capacitive Digital Isolator Powered) is the name for capacitive digital isolators with an integrated DC-DC converter. These SOIC-16WB design isolators with dimensions of 10.3mm x 7.5mm x 2.5mm provide various four-channel configurations and support data rates of up to 100Mbps. The integrated isolated DC-DC converter delivers up to 650mW of isolated power at an output voltage of 3.3V or 5V with an isolation voltage of 5kVRMS. The components show exceptional EMC; the minimum conducted and radiated electromagnetic interference is compliant with the EN55032 Class B/CISPR-32 standard.

The company offers free samples for all its digital isolators. The products are available from stock with a very short replenishment time.