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AD9878:  Low Cost, 3.3 V, CMOS Mixed Signal Front End (MxFE®) for Broadband Applications

The AD9878 is a single-supply cable modem/set-top box mixed-signal front end. The device contains a transmit path interpolation filter, a complete quadrature digital upconverter, and transmit DAC. The receive path contains dual, 12-bit ADCs and a 10-bit ADC. All internally required clocks and an output system clock are generated by the PLL from a single crystal oscillator or clock ...More

AD9878:  Low Cost, 3.3 V, CMOS Mixed Signal Front End (MxFE®) for Broadband Applications

Product Description

The AD9878 is a single-supply cable modem/set-top box mixed-signal front end. The device contains a transmit path interpolation filter, a complete quadrature digital upconverter, and transmit DAC. The receive path contains dual, 12-bit ADCs and a 10-bit ADC. All internally required clocks and an output system clock are generated by the PLL from a single crystal oscillator or clock input.

The transmit path interpolation filter provides an upsampling factor of 16 x with an output signal bandwidth up to 5.8 MHz. Carrier frequencies up to 65 MHz with 26 bits of frequency tuning resolution can be generated by the direct digital synthesizer (DDS). The transmit DAC resolution is 12 bits and can run at sampling rates as high as 232 MSPS. Analog output scaling from 0 dB to 7.5 dB in 0.5 dB steps is available to preserve SNR when reduced output levels are required.

The 12-bit ADCs provide excellent undersampling performance, allowing this device to deliver better than 10 ENOBs with IF inputs up to 70 MHz. The 12-bit IF ADCs can sample at rates up to 29 MHz, allowing them to process wideband signals.

The AD9878 includes a programmable sigma-delta DAC, which can be used to control an external component such as a variable gain amplifier (VGA)or a voltage controlled tuner. The AD9878 also integrates a CA port that enables a host processor to interface with the AD8321/AD8323 or AD8322/AD8327/AD8328 programmable gain amplifier (PGA) cable drivers via the MxFE serial port (SPORT).

The AD9878 is available in a 100-lead LQFP package. The AD9878 is specified over the extended industrial (–40 °C to +85 °C) temperature range.

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  • Low Cost 3.3 V CMOS MxFE® for Broadband Applications
  • DOCSIS, EURO-DOCSIS, DVB, DAVIC Compliant
  • 232 Mhz Quadrature Digital Upconverter
  • 12-Bit Direct IF DAC (Txdac+®)
  • Up To 65 Mhz Carrier Frequency DDS
  • Programmable Sampling Clock Rates
  • Analog Tx Output Level Adjust
  • Dual 12-Bit, 29 MSPS Direct
    IF ADCs with Video Clamp Input
  • 10-Bit, 29 MSPS Sampling ADC
  • 8-Bit Sigma-Delta Auxiliary DAC
  • Direct Interface To AD8321/AD8323 or AD8322/AD8327 PGA Cable Driver
  • Resolution (Bits): 12bit
  • T-Put Rate: 29MSPS
  • Part #: AD9878
  • Supply V: Single(+3.3)

Functional Block Diagram for AD9878

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Part# RxTx Function Channel BW MHz IF or RF Range MHz Primary Application Supply V Product Description Price* (1000-4999) Resolution (Bits) # Chan T-Put Rate
AD9863 Bband Quadrature CODEC n/a n/a Broadband Wireless Single(+3), Single(+3.3) Mixed-Signal Front-End (MxFE™) Baseband Transceiver for Broadband Applications $21.68 12 2 50MSPS
ADF9010 Analog RF Front End n/a 840-960 900 MHz RFID/ISM Single(+3) 900MHz ISM Band Analog RF Front End - n/a n/a n/a
ADRF6601 IF-to-Bits Rx Subsys 500 300-2500 Receiver Single(+5) 750 MHz to 1160 MHz Rx Mixer with Integrated Fractional-N PLL and VCO - - - -
ADRF6602 IF-to-Bits Rx Subsys 500 1000-3100 Receiver Single(+5) 1550 MHz to 2150 MHz Rx Mixer with Integrated Fractional-N PLL and VCO - - - -
ADRF6603 IF-to-Bits Rx Subsys 500 1100-3200 Receiver Single(+5) 2100 MHz to 2600 MHz Rx Mixer with Integrated Fractional-N PLL and VCO - - - -
ADRF6604 IF-to-Bits Rx Subsys 500 1200-3600 Receiver Single(+5) 2500 MHz to 2900 MHz Rx Mixer with Integrated Fractional-N PLL and VCO - - - -
ADRF6701 Bits-to-RF/IF Tx Subsys 500 400-1300 Transmitter Single(+5) 750 MHz to 1160 MHz Quadrature Modulator with Integrated Fractional-N PLL and VCO - - - -
ADRF6702 Bits-to-RF/IF Tx Subsys 500 1200-2400 Transmitter Single(+5) 1550 MHz to 2150 MHz Quadrature Modulator with Integrated Fractional-N PLL and VCO - - - -
ADRF6703 Bits-to-RF/IF Tx Subsys 500 1600-2600 Transmitter Single(+5) 2100 MHz to 2600 MHz Quadrature Modulator with Integrated Fractional-N PLL and VCO - - - -
ADRF6704 Bits-to-RF/IF Tx Subsys 500 2200-3000 Transmitter Single(+5) 2500 MHz to 2900 MHz Quadrature Modulator with Integrated Fractional-N PLL and VCO - - - -
ADRF6750 Quadrature Modulator n/a 950 to 1575 VSAT Terminals - 950 MHz to 1575 MHz Quadrature Modulator with Integrated Fractional-N PLL and VCO - - - -
AD9868 Bband CODEC - - Broadband Wireline, Home Networking Multi(+3.3Anlg, +3.3Dig) 10-Bit DAC/80 MSPS, 10-Bit ADC, Mixed-Signal Front-End for Broadband Modem Applications - 10 1 80MSPS
AD9865 Bband CODEC 35 DC-40 Broadband Wireline, Home Networking Single(+3.3) 10-Bit DAC/80 MSPS, 10-Bit ADC, Mixed-Signal Front-End for Broadband Modem Applications $10.07 10 1 80MSPS
AD9869 Bband CODEC 54 DC-40 Broadband Wireline, Home Networking Multi(+3.3Anlg, +3.3Dig), Single(+3.3) 12-Bit DAC/80 MSPS, 12-Bit ADC, Mixed-Signal Front-End for Broadband Modem Applications $18.27 12 1 80MSPS
AD9866 Bband CODEC 35 DC-40 Broadband Wireline, Home Networking Single(+3.3) 12-Bit DAC/80 MSPS 12-Bit ADC, Mixed-Signal Front-End for Broadband Modem Applications $18.77 12 1 80MSPS
AD9861-50 Bband Quadrature CODEC 25 DC-40 Broadband Wireless Single(+3), Single(+3.3) Dual 10-Bit DAC/Dual 50 MSPS ADC Mixed-Signal Front-End (MxFE™) For Broadband Comms Apps $10.84 10 2 50MSPS
AD9861-80 Bband Quadrature CODEC 40 DC-40 Broadband Wireless Single(+3), Single(+3.3) Dual 10-Bit DAC/Dual 80 MSPS ADC Mixed-Signal Front-End (MxFE™) For Broadband Comms Apps $10.84 10 2 80MSPS
AD9862 Bband Quadrature CODEC 32 DC-100 Broadband Wireless Single(+3.3) Dual 14-Bit DAC/Dual 12-Bit ADC Mixed Sig Front-End (MxFE™) for Bband Comms, Rx&Tx PGA, Digital SSB $30.11 12 2 64MSPS
AD9860 Bband Quadrature CODEC 32 DC-100 Broadband Wireless Single(+3.3) Dual 12-Bit DAC/Dual 10-Bit ADC Mixed Sig Front-End (MxFE™) for Bband Comms, Rx&Tx PGA, Digital SSB $13.90 10 2 64MSPS
AD6600 IF-to-Bits Rx Subsys 5 to 10 70-250 Wireless Infrastructure Multi(+3.3, +5), Single(+5) 11-Bit, 1-Channel 20MSPS, or 2-Channel 10 MSPS Gain-Ranging ADC with RSSI $38.96 11 2 20MSPS
AD9864 IF-to-Bits Rx Subsys 0.007 to 0.270 10-300 Narrowband Radio, Portable & Mobile Radio Single(+3), Single(+3.3) 24-Bit Bandpass Sigma-Delta ADC/IF Digitizing Subsystem $10.07 24 1 375kSPS
AD9874 IF-to-Bits Rx Subsys 0.007 to 0.270 10-300 Narrowband Radio, Portable & Mobile Radio Single(+3), Single(+3.3) 24-Bit Bandpass Sigma-Delta ADC IF Digitizing Subsystem $15.14 24 1 541.5kSPS
AD6650 IF-to-Bits Rx Subsys 3.5 70-300 Wireless Infrastructure Single(+3), Single(+3.3) 16/24-Bit, 1 MSPS, Diversity IF-to-Baseband GSM/EDGE Narrowband Receiver $20.64 24 2 1MSPS
AD9969 Multi-Chan Bband CODEC 8 DC-70 Cable Modem/Set Top Box Single(+3.3) 3.3 V CMOS MxFE™ Mixed Signal Front End for broadband Set Top Box And Cable Modem applications $14.42 12 3 29MSPS
AD9878 Multi-Chan Bband CODEC 8 DC-70 Cable Modem/Set Top Box Single(+3.3) Dual 12-Bit, 29 MSPS Direct IF ADC/12-Bit Direct IF DAC, Mixed-Signal Front-End for Broadband Apps $13.68 12 4 29MSPS
AD9879 Multi-Chan Bband CODEC 8 DC-70 Cable Modem/Set Top Box Single(+3.3) 12-Bit Mixed-Signal Front-End for Set Top Box & Cable Modem Applications $12.12 12 5 29MSPS
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*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.