F1152 RF to IF Dual Downconverting Mixer

The RF-to-IF mixer dominates the linearity performance of the receiver system. The Zero-Distortion family of mixers dramatically improves the maximum signal levels (IM3 tones) that the BTS can withstand at a desired Signal to Noise Ratio (SNR). Alternately, one can run the device in Low Current Mode to reduce power consumption significantly. In the circuit, pin RF_A is the main channel RF input while pin RF_B is the diversity channel input. However, both are internally matched to 50Ω. The resistor connected to pin IF_BiasB is used to set the bias for the diversity IF amplifier as well as the pin IF_BiasA.

The RF-to-IF Dual Downconverting Mixer operates with low power dissipation which provides an option for a low power mode for power sensitive applications. Nominally, the device offers +43dBm Output IP3 with 327mA of ICC. Alternately, the four resistor values and a toggle pin can be adjusted to run the device in a low current mode with +40dBm Output IP3 and 232mA of ICC.