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F1320 Scheda tecnica(PDF) 1 Page - Renesas Technology Corp |
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F1320 Scheda tecnica(HTML) 1 Page - Renesas Technology Corp |
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1 / 26 page  DPD Demodulator for PA Linearization 1300MHz to 2900MHz IDT Zero-Distortion TM, Glitch-FreeTM DPD Receiver 1 Rev4, January 2014 IDTF1370NBGI Datasheet GENERAL DESCRIPTION This document describes the specification for the IDTF1370 Digital Pre-Distortion Demodulator for PA linearization. This series of devices is offered in 2 variants to cover common UTRA bands. See part number matrix below for additional detail. COMPETITIVE ADVANTAGE In typical basestation transmitters digital pre-distortion is employed to improve the Transmitter performance. The signal coming out of the PA is sampled and the incoming Tx chain I&Q data is pre-distorted to counteract the distortion inherent in the PA. The PA signal is adjusted via a digital step attenuator to a lower level and then sub-sampled at an IF frequency of ~200 MHz which necessitates the need for a highly linear demodulator to downmix 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 w/integrated DSA such as the IDTF1370, the ACLR and/or power consumption of the full Tx system can be improved significantly. D DPPD D ffuullll ppaatthh A AC CLLR R:: 1 1 d dB B IIcccc:: D DPPD D ffuunnccttiioonn PPoow weerr C Coonnssuum mppttiioonn 4 40 0% % Z Ze erro o--D Diisstto orrttiio on nTTM M D De em mo od d e elliim miin na atte ess 2 2 IIFF a am mp pss IIn ntte eg grra atte ess 2 2 B BP PFFss,, 2 2 B Ba allu un nss,, S SP PD DT T R RFF ssw wiittcch h G Glliittcchh--FFrreeeeTTMM ggaaiinn ccoonnttrrooll PART# MATRIX Part# RF range UTRA bands IF freq range Typ. Gain Injection F F1 13 32 20 0 5 55 50 0 -- 1 11 15 50 0 5 5,,6 6,,8 8,,1 12 2,,1 13 3,, 1 14 4,,1 17 7 2 20 0 -- 3 35 50 0 1 12 2..5 5 H Hiig gh h S Siid de e o orr L Lo ow w S Siid de e F F1 13 37 70 0 1 13 30 00 0 -- 2 29 90 00 0 1 1,,2 2,,3 3,,4 4,,9 9,,1 10 0 7 7,,2 21 1,, 2 24 4,, 3 38 8 2 20 0 -- 5 50 00 0 1 12 2..5 5 H Hiig gh h S Siid de e o orr L Lo ow w S Siid de e FEATURES (I OR Q PATH) Wide flat performance IF BW Wide RF and LO BWs (~ 1.6 GHz) Ideal for Multi-Carrier Systems D Drriivve ess A AD DC C d diirre eccttllyy Ultra linear + +4 41 1 d dB Bm m IIP P3 3OO Low Noise Figure Excellent ACLR performance 200 Ω output impedance Fully integrated DPD demodulator 6 6x x6 6 3 36 6 p piin n p pa acck ka ag ge e Standby Mode w/Fast Recovery ICC: 2 27 75 5 m mA A DEVICE BLOCK DIAGRAM ORDERING INFORMATION IFI IBIAS Bias Control STBY IFQ 90 O DEC CLK SPI CSb SDI RFIN_X RFIN_Y . SPLIT LOIN ISET 2 RF VCO IDTF1370NBGI8 0.8 mm height package Green Industrial Temp range Omit IDT prefix RF product Line Tape & Reel Glitch-FreeTM Glitch-FreeTM |
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