DS28E18 1-Wire-to-I2C/SPI bridge extends links up to 100m

Networks of remotely connected I2C and SPI sensors can be built at less expense, using the DS28E18-1 bridge from Maxim Integrated. It can be used to expand connections to remote sensor networks with reduced complexity and cost to the industry’s lowest levels, claims the company. The DS28E18 1-Wire-to-I2C/SPI bridge uses Maxim’s 1-Wire protocol to interface with I2C and SPI-compatible sensors. It enables both power and communications on a single wire, using the 1-Wire protocol to link with I2C or SPI peripheral devices over 100m with only two wires. This eliminates up to five extender and switch ICs, reducing connection costs and software complexity. In addition, only one programmable I/O port from the host microcontroller is necessary to operate a network with 10 to 20 nodes.
Nowadays, most designers use serial interfaces to connect remote sensors in industrial and remote monitoring applications. The most popular protocols are costly and complex because they require up to five external switch extenders to reach devices at distances as long as 100m. Some of the interfaces widely deployed today require six cables for connecting multiple extended sensors to a host microcontroller, points out Maxim.

The DS28E18 is available at Maxim Integrated’s website and from authorised distributors. The company also offers the DS28E18EVKIT# evaluation kit.

Maxim Integrated develops innovative analogue and mixed-signal products and technologies to make systems smaller and smarter, with enhanced security and increased energy efficiency. The company says it is empowering design innovation for automotive, industrial, healthcare, mobile consumer and cloud data centre customers.


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