NRF904 FSK 915 MHz transmitter

NRF904 is a monolithic transmitter chip that conforms to the North American FCC CFR47 Part l5 standard. It is suitable for alarm, automatic meter reading system, keyless entry system, home automation, remote control, wireless digital communication and other applications.

The main technical features are as follows:

·The operating frequency is 902 ～ 928 MHz;

·FSK modulation mode;

·FSK data rate is 50 Kb/s;

·The power supply voltage is 2.4~3.6 V;

·The working current is 9 mA (at -10 dBm output power), and the current is less than 10 nA in low power consumption mode;

·The output power is l dBm;

·Output power and frequency offset can be programmed through external resistance;

·Provide synchronous pulse output terminal to microprocessor.

Circuit diagram of 915 MHz transmitter of nRF904