RF2909 GMSK/QPSK/DQPSK/QAM 915 MHz Transmitter

The RF2909 is a 915 MHz ISM band transmitter chip that uses a passive network for its LO (local oscillator). It is suitable for spread spectrum cordless phones, portable battery-powered mobile devices, and applications in the 915 MHz ISM band. 

The main technical features are as follows: 

The output power can be set to 1 mW, 10 mW or 70 mW through two digital input control signals, and can also be adjusted within the range of 1 to 80 mW through an analog input signal; 

・GMSK, QPSK, DQPSK and QAM modulation; 

・The power supply voltage is 2.7 to 5 V; 

・The maximum operating current is 200 mA, and the standby current is l uA; 

・Has excellent phase and amplitude balance.

RF2909 Evaluation Board Circuit