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ADS62 Datasheet(PDF) 6 Page - Texas Instruments |
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ADS62 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 49 page GC5330 GC5337 SLWS226 B – DECEMBER 2010 – REVISED JANUARY 2011 www.ti.com The RX path can be configured for one or two multichannel ADC input ports. The RX block provides each ADC channel with a front-end AGC, IQ demodulation correction, real-to-complex conversion, complex mixing, decimation, and complex equalization. The RX block output is input to the DDUC block. The output of the DDUC block goes through gain and back-end AGC and is formatted for the baseband output. There are four DDUC blocks. Each can be used for the RX DDC downconversion or TX DUC upconversion, one at a time. The DDUC has a complex mixer, cascade integrator comb filter, resampler, and a programmable FIR filter. Each DDUC can support 1 to 12 channels. The TX path can be configured for one, two, or four antenna streams. In addition, with one or two antenna streams, an envelope modulator output is available. The DAC and envelope modulator share the same output ports. The TX input is from the baseband input, through the DDUC to create complex antenna streams. The CFR block provides for gain adjustment, peak reduction, and peak limiting. The CFR block peak power reduction and follow-on circular limiter provide the headroom to apply the DPD correction, and to lower the peak power results for more power amplifier efficiency. Additional interpolation stages after CFR expand the antenna stream bandwidth to the DPD bandwidth. The DPD has both high-performance (more correction) and high-bandwidth (more bandwidth) modes. The high-bandwidth mode supports 62 MHz {74 MHz} for one or two antenna streams, and 31 MHz {37 MHz} for four antenna streams with fifth-order expansion bandwidth. The high-performance mode supports one antenna at 62 MHz {74 MHz}, two antennae at 31 MHz {37 MHz}, or four antennae at 15.5 MHz {18.5 MHz}. The GC533x DPD processor provides phase correction, gain correction, and nonlinear feedforward correction for each TX stream. The spectral emission or ACP performance is improved by 20 dB or more. Specialized capture logic collects the RX input, feedback input, RX output, DPD input, and DPD output for the DSP processor to perform the adaption algorithm. The capture logic can also be used for performance monitoring and power measurement. AVAILABLE OPTIONS PART NUMBER TC PACKAGE THERMAL PROPERTIES GC5330IZEV –40°C to 85°C 484 ball 23-mm × 23-mm PBGA Heat transfer through package top GC5337IZEV –40°C to 85°C 484 ball 23-mm × 23-mm PBGA Heat transfer through package top 6 Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated Product Folder Link(s): GC5330 GC5337 |
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