The MICRF009 is a Micrel QwikRadio low-power UHF receiver aimed at the automotive, industrial and consumer markets. The MICRF009 is a single chip, ASK/OOK (on-off keyed) RF receiver IC that provides the same function but has some performance enhancements over earlier QwikRadio receivers. Two key improvements are: higher sensitivity (typically 6 dB higher than the MICRF002) and faster recovery from shutdown (typically 1 ms). Like all other members of the QwikRadio family, the MICRF009 achieves low power operation, a very high level of integration, and it is particularly easy to use.
All post-detection (demodulator) data filtering is provided on the device, so no external baseband filters are required. One of two filter bandwidths may be selected externally by the user. The user only needs to program the appropriate filter selection based on the data rate and code modulation format.
The MICRF009 offer two modes of operation; fixed-mode (FIX) and sweep-mode (SWP). In fixed-mode the MICRF009 functions as a conventional superheterodyne receiver. In sweep-mode the MICRF009 employs a patented sweeping function to sweep a wider RF spectrum. Fixed-mode provides better selectivity and sensitivity performance while sweep mode enables the MICRF009 to be used with low-cost, imprecise transmitters.
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