Renesas Electronics F1385
the F1385 Digital Pre-Distortion Demodulator for PA linearization. This series of devices is offered in two frequency variants to cover common UTRA bands. The signal out of the PA is sampled and the incoming TX chain I & Q data is predistorted to counteract the distortion inherent in the PA.| Part No. | F1385 |
|---|---|
| Datasheet | F1385 Download |
| Manufacturer |  Renesas Electronics |
| Description | DPD Demodulator |
| Buy | Stock & Price |
DESCRIPTION
This document describes the specification for Competitive Advantage In typical Base Station transmitters digital pre-distortion is employed to improve the transmitter performance. The PA signal is adjusted via a digital step attenuator to a lower level and then sub-sampled at an IF frequency of ~350 MHz which necessitates the need for a highly linear demodulator to downconvert to quadrature IF from the transmit frequency. By sampling IF_I and IF_Q independently and then digitally combining these signals, an effective doubling of the sample rate can be achieved. Any distortion in this path will degrade the performance of the DPD algorithm. By utilizing an ultra-linear demodulator with integrated DSA such as the F1385, the ACLR and/or power consumption of the full TX system can be improved significantly.● DPD full path ACLR: Reduced by 1 dB
● Icc: Typically 45% less current
● Zero-DistortionTM eliminates 2 IF amps
● Integrates 2 Baluns, SP2T RF switch
● Glitch-FreeTM gain co...
