Mansfield, Mass. Murata Power Solutions (formerly C&D Technologies' Power Electronics Division) has introduced a series of transformers that simplify implementation of isolated RS-485 and RS-422 interfaces based on chipsets from Analog Devices Inc. (ADI) by eliminating the need to select, compare and test alternative solutions.
Each device in the 782485 converter transformer series has been specifically designed for use with the ADI's ADM2485 high-speed, isolated differential bus RS-485 transceiver. Fully approved by Analog Devices, the transformers are also recommended in the company's ADM2485 datasheets and reference design documentation.
Available with nominal input voltage variants of 3.3 V and 5.0 V, the 782485 transformers offer 2.5 kV rms isolation and deliver a nominal output voltage of 6.0 V. Maximum output current is 200 mA. Accurately controlled turns ratios ensure consistent performance, while the toroidal construction provides high efficiency and minimizes electromagnetic interference (EMI), said Murata.
The transformers are supplied in a low profile (6.35 mm), fully encapsulated package with an industry standard DIL pinout. Surface-mount versions will be available soon. Each device operates across the full industrial temperature range of -40°C to 85°C.
Incorporating an internal transformer driver, the ADM2485 is deployed in isolated RS-485 and RS-422 interfaces as well as PROFIBUS networks, industrial field networks and multi-point data transmission systems. Combining the device with a Murata 782485 transformer, an LDO regulator and a small number of discrete components allows designers to quickly implement a fully isolated 5-V power supply, said Murata.
Murata Power Solutions, 1-508-339-3000, www.murata-ps.com