High-end wireless enhances automotive and ISM applications

For enhanced reliability in wireless communications, RF systems built using the Melexis MLX71121 receiver IC implement antenna diversity to select the best signal from either of two antennas.

Until now, antenna diversity has only been provided in high-end systems. Melexis has now implemented two separate Low-Noise Amplifiers (LNAs) at lower cost to create the MLX71121, enabling improved performance in cost-sensitive applications. The device can be used in automotive environments, and is suitable for many consumer and professional applications in the unlicensed Industrial-Scientific-Medical (ISM) and Short-Range-Devices (SRD) frequency bands.

The receiver covers a wide frequency range from 300MHz to 930MHz, and dual-band design allows the RF inputs to be switched between two applications running in separate bands such as 433MHz and 868MHz.

Additional features include fully-internal FSK and ASK demodulators, Automatic Frequency Control (AFC) allowing tolerance of frequency uncertainties in the input signal, and an on-chip 230kHz-bandwidth IF filter that eliminates external filtering components.

 

FEATURES Receiver sensitivity: 107dBm (FSK) 113dBm (ASK) Operating voltage: 2.1V to 5.5V Operating temperature: -40°C to 125°C Output noise cancellation filter MCU clock output

APPLICATIONS Alarm and security systems Remote Keyless Entry (RKE) Tyre-Pressure Monitoring Systems (TPMS) Low-power telemetry Remote controls Home and building automation

 

 

 

Development board EVB71121 is available to members of the Future Board Club. To apply for the development board, and membership of the Board Club, go to www.my-boardclub.com/manf-offers.htm This offer is free and subject to qualification.

 

Melexis: MLX71121