IA4420/21 is a RF transceiver chip launched by Integration Associates. IA4420 works in the 315/433/868/915MHz frequency band, and IA4421 works in the 433/868/915MHz frequency band. The chip has an operating voltage of 2.2~5.4V, adopts low power mode, and the standby current is 0.3μA. It adopts FSK modulation mode, the transmission power is 5~8dbm, the receiving sensitivity is -109dbm, and the built-in clock output can save the MCU crystal oscillator. IA4420/21 has a high data transmission rate, the transmission rate of digital signals can reach 115.2kbps, and the transmission rate of analog signals can reach 256kbps.
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