F1701 Ultra-linear Single-channel Mixer for Rx Applications
Created: Dec 10, 2015
The circuit is supplied with a 5V supply. The supply pins are bypassed by an external capacitor to minimize the noise and fast transients. The noise in the supply can degrade noise figure. The fast transients can trigger electrostatic discharge clamp
The RF to IF mixer dominates the linearity performance for the entire receive system. These downconverter devices, F1701 is lowband RF to IF single downconverting mixer, which is part of the series of mixers that uses lowside or highside LO (local oscillator) injection options for all UTRA frequency bands. The F1701 is ideal for multi-carrier basestation receiver over the frequency range from 600MHz to 1060MHz using either lowside or highside LO. It also supports IF frequencies from 70MHz to 300MHz. It offers a +43dBm output IP3 using highside LO with 184mA of Icc.
The circuit is supplied with a 5V supply. The supply pins are bypassed by an external capacitor to minimize the noise and fast transients. The noise in the supply can degrade noise figure. The fast transients can trigger electrostatic discharge clamps (ESD) and cause them to fail. The STBY pin is connected to the ground for normal mode of operation and can be disabled by pulling it high. The RF signal is inputted through J5 in the RF_IN pin while the local oscillator is inputted through J6 in the LO_IN pin. The pins IF_OUT- and IF_OUT+ are responsible for mixer differential IF output.
With the ultra linear mixer in the digital pre-distortion receiver path of the F1701, the adjacent channel leakage ratio and power consumption of the full transmitter system can be improved significantly. This is because the F1701 can directly drive an ADC through an Anti-Alias filter.