Micrel has released its new RF transceiver chip that has been designed to save space and cost while increasing performance and ease of use. It is also the first product resulting from the company's recent acquisition of Norway-based BlueChip Communication, now known as Micrel Norway.
The MICRF505 transceiver operates from 850 to 950 MHz and supports FSK modulation at data-rates up to 200 kbps. Many functions are user programmable, including the frequency synthesizer, making the MICRF505 ideal for frequency hopping applications.
According to Micrel, reducing the overall size and lowering the total bill of materials was a primary objective in the chip's design. The number of external components has been reduced to just a few capacitors, an inductor and a crystal. Packaged in a 5 x 5 mm MLF, the MICRF505 is designed to accommodate low-cost, low-accuracy crystals. To address this, Micrel added a frequency error estimator to determine frequency mismatch between communicating transceivers and an internal crystal tuning mechanism to enable automated crystal tuning on-the-fly. The device also incorporates an internal clock recovery circuit to reduce the burden on its companion baseband device, allowing the use of a lower cost microcontroller.
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