TDA5250

INFINEON  TDA5250  芯片, 射频收发器, 868-870MHZ, TSSOP-38

The is a low power consumption single chip FSK/ASK Wireless Transceiver for half duplex low data rate communication in the 868 to 870MHz band. The IC offers a very high level of integration and needs only a few external components. It contains a highly efficient power amplifier, a low noise amplifier LNA with AGC, a double balanced mixer, a complex direct conversion stage, 1/Q limiters with RSSI generation, an FSK demodulator, a fully integrated VCO and PLL synthesizer, a tuneable crystal oscillator, an onboard data filter, a data comparator slicer, positive and negative peak detectors, a data rate detection circuit and a 2/3-wire bus interface. Additionally there is a power down feature to save battery power.

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Low supply current

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Power down mode with very low supply current consumption

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FSK and ASK modulation and demodulation capability

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Fully integrated VCO/PLL synthesizer and loop filter on-chip with on chip crystal oscillator tuning

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l²C/3-wire µController interface

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On-chip low pass channel select filter and data filter with tuneable bandwidth

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Data slicer with self-adjusting threshold and 2 peak detectors

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FSK sensitivity <-109dBm, ASK sensitivity <-109dBm

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Transmit power up to +13dBm

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Data rates up to 64kbps Manchester encoded

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Self-polling logic with ultra fast data rate detection