BETTER - EASIER - SMALLER
MICREL RECENTLY INTRODUCED THE MICRF505, REPRESENTING THE NEXT GENERATION IN RADIOWIRE TRANSCEIVERS. SPECIFICALLY DESIGNED TO SAVE SPACE AND COSTS, THE NEW MICREL DEVICES ALSO FEATURE BETTER PERFORMANCE AND EASE OF USE.
Smaller: Tiny 5 x 5mm MLF package.
Easier to use: No tuning, with few external components.
Better: High sensitivity and high transmit power.
The MICRF505 transceiver operates from 850MHz to 950MHz and supports FSK modulation at data rates up to 200kbps. Many functions are user programmable, including the frequency synthesizer, which makes the MICRF505 ideal for frequency hopping applications.
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Reducing the overall size and bill of materials (BOM) was the primary objective in the design of this new transceiver. Thanks to its high integration, the MICRF505 reduces the number of external components to a minimum, and the 5mm x 5mm MLF package is designed to accommodate low-cost, low-accuracy crystals. For guaranteed operability with the latter, the new Micrel device uses an integrated frequency error estimator to determine and eliminate frequency mismatches between the communicating transceiver and the internal crystal amplifying mechanism. The MICRF505 also incorporates an internal clock recovery circuit to reduce the burden on its companion baseband device, thereby enabling the use of a lower-cost microcontroller.
Despite its reduced-BOM design, the MICRF505 sacrifices nothing in the way of RF performance - it actually counts high sensitivity, selectivity and transmit power among its features. What's more, the integrated transmit/receive (T/R) switch ensures that there are no switch losses, for even better system-level RF performance.
Summary of Specifications
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850MHz - 950MHz operating range
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-112dBm sensitivity (2.4 kbps @ 10^-3 BER)
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Output Power programmable to +10dBm
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FSK modulation
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200Kbps maximum data rate
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Supply voltage from 2.0V to 2.5V
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Supply current: 13mA in receive mode,
28mA in transmit mode
Ivan Mitic, EXT 85
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