Analog Devices, Inc. · NASDAQ:ADI
Analog Devices — Technical Presentation (April 2002)
12 slides from Analog Devices's technical presentation, Apr 24, 2002
Slide 1: AD9860 and AD9862
AD9860 and AD9862 April 24, 2002 The World Leader in High-Performance Signal Processing Solutions
Slide 2: AD9860/2 MxFE for Broadband Communications
AD9860/2 MxFETM for Broadband Communications AD9860/2 FEATURES A Versatile Mixed Signal Front-End Processor with Dual VIN+ A Converter Receive and Dual Converter Transmit Paths VIN- B 1X PGA ADC DIGITAL PROCESSING DATA (BYPASSABLE) MUX Receive path includes Dual 10-/12-Bit, 64 MSPS VIN+ B DECIMATION
Slide 3: AD9860/62 Dual Channel Mixed Signal Front End (MxFE)
AD9860/62 Dual Channel Mixed Signal Front End (MxFE) Targeted at Broadband Wireless and other High Performance Broadband Modem Applications Dual 10/12-bit 64 MSPS ADC and Dual 12/14-bit 128MSPS DAC with 1X, 2X or 4X Interpolation Integrated on a single IC Tx Signal Path accepts and processes rea
Slide 4: AD9862: Broadband Wireless Access Modem App.
AD9862: Broadband Wireless Access Modem App. Customer Premise Station Antenna Linear Circuitry 70 MBit/s max. @15MHz BW Digital Modem 2.5 - 2.68 GHz (MMDS) 3.5 GHz (Europe) MxFE PHY MAC 5.25 – 5.8 GHz (UNII) PLL Beam Former / Equalizer MAC RISC- Processor RF / IF ADC Filter FFT OFDM QAM- Error Corre
Slide 5: AD9860/2 MxFE Transmit Path
AD9860/2 MxFETM Transmit Path Block A Block B Block C Block D Block E IOUT+ A I PGA DAC IOUT- A HILBERT FILTER IOUT+ B IOUT- B PGA DAC Q Fs/4 DDS Fs/8 DAC output of OFDM signal using various AD9862 digital processing features: 1.) 0 to 96 MHz spectrum of “Real” output, 2.) with 4x Interpolation, Blo
Slide 6: Tx Path Image-Rejection for Single or Multi-Carrier Applications
Tx Path Image-Rejection for Single or Multi-Carrier Applications FDAC/4 FLO+FDAC/4 0 FLO or FDAC/8 or FDAC/8 Real, I/Q Single/Multi-Carrier, Interleaved or Non- interleaved data AD9860/62 AD8345/46/49 LPF x 14-bit DAC Σ SAW DSP or Customer Complex Modulation Hilbert Filter + w/Fs/4 or Fs/8 Interpola
Slide 7: Tx Path Configured for Image-Rejection Applications
Tx Path Configured for Image-Rejection Applications Desired Signal LO Feedthrough Image of Signal 7 www.analog.com
Slide 8: Simple Analog Interface Between TxDACs and ADI Quadrature Modulators
Simple Analog Interface Between TxDAC’s and ADI Quadrature Modulators No Active DC Level Shifting Components Required!!! VDIFF= 1.0 V p-p and ~ ~ VCM=0.7 V AD9860/62 VPBF IOUTA BBIP 12/14-bit DAC I TxDAC X VOUT IOUTB BBIN + AD9860 or AD9862 Phase LOIP QOUTA BBQP Splitter LOIN Q TxDAC 12/14-bit DAC
Slide 9: Direct Conversion Possible Using AD8349 Quadrature Modulator
Direct Conversion Possible Using AD8349 Quadrature Modulator Single Carrier WCDMA Signal Achieves 67 dB ACLR 9 www.analog.com
Slide 10: AD9860/2 MxFE Receive Path
AD9860/2 MxFETM Receive Path Vin+ A ADC Vin- A PGA HILBERT FILTER Vin+ B PGA ADC VinT- B Rx without Decimation Rx with Decimation SINAD 64.6dBFS SINAD 66.8 dBFS THD –70.07 dBFS THD –84.5 dBFS Distorted input – 12.5MHz Single tone 10 www.analog.com
Slide 11: Supports Baseband I/Q or Image Rejection Down Conversion Receive Architectures
Supports Baseband I/Q or Image Rejection Down Conversion Receive Architectures Quadrature Down Mixed Signal Front End (MxFE) Converter AD8347 AD9860/62 ILPF(t) X LPF 1X PGA ADC LO DECIMATION + 90 0 Fc + HILBERT FILTER X LPF 1X PGA ADC QLPF(t) 11 www.analog.com
Slide 12: Dual Channel Direct IF Receive Architecture
Dual Channel Direct IF Receive Architecture AD9860/62 FILTER FILTER ADC DSP or X & LNA ASIC LO FS FILTER X FILTER ADC DSP or & LNA ASIC LO 12 www.analog.com