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AD7013 Folha de dados(PDF) 1 Page - Analog Devices |
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AD7013 Folha de dados(HTML) 1 Page - Analog Devices |
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1 / 20 page  AD7013 REV. A One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 a Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. CMOS TIA IS-54 Baseband Receive Port GENERAL DESCRIPTION The AD7013 is a complete low power, CMOS, TIA IS-54 base- band receive port with single +5 V power supply. The part is designed to perform the baseband conversion of I and Q waveforms in accordance with the American (TIA IS-54) Digital Cellular Telephone system. The receive path consists of two high performance sigma-delta ADCs, each followed by a FIR digital filter. A primary and auxiliary set of IQ differential analog inputs are provided, where either can be selected as inputs to the sigma-delta ADCs. Also, a choice of two frequency responses are available for the receive FIR filters; a Root-Raised-Cosine filter for digital mode or a brick wall response for analog mode. Differential analog inputs are provided for both I and Q channels. On-chip calibration logic is also provided to remove either on-chip offsets or remove system offsets. A 16-bit serial interface is provided, interfacing easily to most DSPs. The receive path also provides a means to vary the sampling instant, giving a resolution to 1/32 of a symbol interval. The auxiliary section provides two 8-bit DACs and one 10-bit DAC for functions such as automatic gain control (AGC), automatic frequency control (AFC) and power amplifier control. As it is a necessity for all digital mobile systems to use the lowest possible power, the device has receive and auxiliary power down options. The AD7013 is housed in a space efficient 28-pin SSOP (Shrink Small Outline Package). FUNCTIONAL BLOCK DIAGRAM DxCLK AD7013 VAA DGND VDD AGND BYPASS MCLK IRx IRx Rx CLK Rx DATA Rx FRAME AUX DAC1 AUX DAC2 AUX DAC3 ∆Σ–∆ MODULATOR AUX IRx AUX IRx QRx QRx AUX QRx AUX QRx MUX MUX DATA IN FRAME IN RECEIVE CHANNEL SERIAL INTERFACE ANALOG MODE FIR DIGITAL FILTER ROOT RAISED COSINE FIR DIGITAL FILTER FS ADJUST AGND AGND MODE1 FRAME OUT SERIAL INTERFACE ANALOG MODE FIR DIGITAL FILTER ROOT RAISED COSINE FIR DIGITAL FILTER OFFSET ADJUST OFFSET ADJUST SWITCHED CAP FILTER SWITCHED CAP FILTER ∆Σ–∆ MODULATOR 1.23V REFERENCE LATCH 8-BIT AUX DAC FULL-SCALE ADJUST LATCH 8-BIT AUX DAC LATCH 10-BIT AUX DAC FEATURES Single +5 V Supply Receive Channel Differential or Single-Ended Analog Inputs Auxiliary Set of Analog I & Q Inputs Two Sigma-Delta A/D Converters Choice of Two Digital FIR Filters Root-Raised-Cosine Rx Filters, α = 0.35 Brick Wall FIR Rx Filters On-Chip or User Rx Offset Calibration ADC Sampling Vernier Three Auxiliary DACs On-Chip Voltage Reference Low Active Power Dissipation, Typical 45 mW Low Sleep Mode Power Dissipation, <50 µW 28-Pin SSOP APPLICATIONS American TIA Digital Cellular Telephony American Analog Cellular Telephony Digital Baseband Receivers OBSOLETE |
Nº de peça semelhante - AD7013_15 |
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Descrição semelhante - AD7013_15 |
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