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Micrel Releases RF Device Range Extender

October 25, 2012

Micrel Releases RF Device Range Extender

By Rory Lidstone
TMCnet Contributing Writer

A Provider of higher-performance analog and high-speed mixed signal solutions, LAN and timing communications solutions, Micrel (News - Alert) recently made available the MICRF300, a 100 MHz to 1,000 MHz low-noise amplifier (LNA) with low power shutdown mode. The device is meant to extend the range of low power, low data rate devices in this frequency range – Remote Keyless Entry (RKE), Garage Door Opener (GDO), Automatic Meter Reading (AMR) – with minimal cost and power consumption.

The MICRF300 is currently only available in volume quantities. However, samples can be ordered here.

"The MICRF300 provides a low noise figure with integrated logic-level shutdown, allowing RF designers to easily extend range of their RKE, GDO or AMR applications," noted Brian Hedayati, vice president of marketing for the Analog business unit at Micrel. "The logic-level shutdown input allows the device to easily be interfaced to a microcontroller without the additional bias circuitry typically required by discrete LNAs to implement a shutdown function. This makes it an ideal solution for battery powered and space constrained applications, which require a very low average current consumption."

Operating over the 1.8 V to 3.6 V supply voltage range, the MICRF300 provides a low noise figure of 1.15 dB with a gain of 18.3 dB at 315 MHz and 433.92 MHz, while consuming a mere 2.5 mA of supply current during operation.

Furthermore, the device is capable of operating within a temperature range of -40 degrees Fahrenheit to 257 degrees Fahrenheit.

Micrel also recently released four new products that incorporate its proprietary Ripple Blocker technology. The MIC94305 and the MIC94325/45/55 family support more than twice the output current load offered by older 200 mA Ripple Blocker products, while keeping the same highly efficient noise suppression.

Last month, the company, along with Marvell Technology Group, announced the new IEEE (News - Alert) 802.3 standard-compliant PHY for in-vehicle networking.

Edited by Braden Becker

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