TDA5220屬于RF/IF射頻/中頻RFID的射頻接收器。由英飛凌科技股份公司制造生產(chǎn)的TDA5220射頻接收器RF 接收器用于接收已調(diào)制的射頻信號并對其進(jìn)行解調(diào)，然后將數(shù)據(jù)傳送到系統(tǒng)中進(jìn)行處理。頻率范圍是 AM、FM、WB、0 Hz 至 64 GHz，數(shù)據(jù)速率為 250 bps 至 16 Gbps，數(shù)據(jù)接口包括連接器、I2C、I2S、引腳焊盤、并行、PCB、串行、焊盤、SPI、UART 和 USB。

The IC is a very low power consumption single chip FSK/ASK Superheterodyne Receiver (SHR) for the frequency bands 810 to 870 MHz and 400 to 440 MHz. The IC offers a high level of integration and needs only a few external components. The device contains a low noise amplifier (LNA), a double balanced mixer, a fully integrated VCO, a PLL synthesiser, a crystal oscillator, a limiter with RSSI generator, a PLL FSK demodulator, a data filter, an advanced data comparator (slicer) with selection between two threshold modes and a peak detector. Additionally there is a power down feature to save current and extend battery life, and two selectable alternatives of generating the data slicer threshold.

? Low supply current (Is = 5.7/5.9 mA typ. in FSK mode, Is = 5.0/5.2 mA typ. in ASK mode for 434/868 MHz)

? Supply voltage range 5V ±10

? Power down mode with very low supply current (50nA typ.)

? FSK and ASK demodulation capability

? Fully integrated VCO and PLL Synthesiser

? ASK sensitivity better than -106 dBm over specified temperature range (- 40 to +105°C)

? FSK sensitivity better than -100 dBm over specified temperature range (- 40 to +105°C)

? Selectable frequency ranges 810-870 MHz and 400-440 MHz

? Limiter with RSSI generation, operating at 10.7MHz

? 2nd order low pass data filter with external capacitors

? Data slicer with selection between two threshold modes