The TDA5200/5211 are low-power ASK/FSK wireless receivers operating in the 315/434/868MHz ISM bands., RF Frequency Ranges: 433 to 435MHz, 868 to 870MHz (TDA5200), 310 to 350MHz (TDA5211). Receiver Sensitivity: -105dBm @ 4000bps ASK. Modulation: ASK (TDA52