OOK/ASK receivers offer -112dBm sensitivity at 1kb/s

21st April 2015

Micrel, Inc.

Barney Scott

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Micrel has introduced the MICRF229 and the MICRF230, low-power, 400-450MHz, super-heterodyne, image reject, OOK/ASK receivers. Both devices feature -112dBm sensitivity at a data rate of 1kb/s and operate from 3.5 to 5.5V. They consume less than 6mA of current when receiving data continuously and are aimed at Remote Keyless Entry (RKE), garage door openers, home automation, and other low-power, low data rate applications.

The MICRF229 and MICRF230 require only a crystal and a minimum number of external components to implement. The MICRF229 has an auto-poll feature that allows power consumption to be reduced to under 0.5mW while the receiver awakes and polls for a valid signal before awaking the MCU.

The MICRF230 employs an optional Squelch feature which disables the data output until valid bits are detected, allowing the MCU to remain in low-power shutdown mode drawing only 0.5uA of supply current to save power. The MICRF229 and MICRF230 are specified with an operating temperature range of -40 to +105°C and are offered in a 16-pin 4.9x6.0mm QSOP package.

“The global home automation and control market is slated for fast growth. These markets include security and lighting control,” noted Brain Hedayati, Vice President of Marketing, Linear and Power Solutions, Micrel. “Micrel's RF products continue to address this explosive market with our low power, cost effective and robust RF solutions.”

The MICRF229 and MICRF230 are currently available in sample and volume quantities, with 1,000 quantity pricing starting at $1.60.