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AD6636:  150 MSPS Wideband (Digital) Receive Signal Processor (RSP)

Product Details

The AD6636 is a (Digital) Receive Signal Processor intended for direct IF sampling or highly sampled baseband radios requiring wide-bandwidth input signals. It has been optimized for the demanding filtering requirements of wideband standards like, CDMA2000, UMTS, and TD-SCDMA. The AD6636 is designed to be used as part of radio system that uses either an IF sampling ADC, or a baseband sampling ADC.

The AD6636 has the following signal processing stages: a Frequency Translator, a 5th order Cascaded Integrated Comb filter, two sets of Cascaded Fixed Coefficient Finite Impulse Response (FIR) and Half Band filters, three cascaded programmable coefficient Sum of Product FIR filters, an Interpolating Half Band Filter (LHB) and a digital Automatic Gain Control (AGC) Block. Multiple modes are supported for clocking data into and out of the chip to provide flexibility for interfacing to a wide variety of digitizers. Programming and control is accomplished via serial or microport interfaces.

The AD6636 features a fractional clock multiplier that uses the ADC clock to produce a digital down converter master clock up to 200 MHz. This internal phased-locked loop (PLL) allows optimum digital clock rates, regardless of the converter sampling rate, enabling the best possible digital signal decimation and filtering. Three 16-bit parallel output ports accommodate high data rate 3G applications. An on-chip interpolating half band filter can also be used to further increase the output rate while still allowing for very efficient filters. In addition, each channel has a digital AGC for output data scaling.


  • Six Independent Wideband Processing Channels
  • Processes 6 Wideband carriers (UMTS, CDMA2000, TD-SCDMA, etc.)
  • Four Single Ended or Two LVDS Parallel Input Ports (16 linear bit plus 3-bit exponent) at
    150 MHz
  • Can support 300MHz input using some external interface logic
  • Three 16-bit Parallel Output Ports operating at
    up to 200 MHz
  • Real or complex input ports
  • Quadrature correction andDC correction
    for complex inputs
  • Can support output rate up to 34 MSPS
  • RMS/Peak Power monitoring of
    input ports
  • Programmable attenuator control for
    external Digital Variable Gain
    Amplifier (DVGA)
  • Three Programmable coefficient FIR
    Filters per channel
  • One Interpolating Half Band
    Filter per channel

Functional Block Diagram for AD6636


Title Content Type File Type
AD6636: 150 MSPS, Wideband, Digital Downconverter (DDC) Data Sheet (Rev A, 06/2005) (pdf, 1133 kB) Data Sheets PDF
AN-807: Multicarrier WCDMA Feasibility  (pdf, 969 kB) Application Notes PDF
AN-808: Multicarrier CDMA2000 Feasibility  (pdf, 1535 kB)
The goal of this application note is to determine the feasibility of implementing a multicarrier CDMA2000 transceiver and what the major subsystem performances must be.
Application Notes PDF
AN-835: Understanding High Speed ADC Testing and Evaluation  (pdf, 985 kB) Application Notes PDF
AN-851: A WiMax Double Downconversion IF Sampling Receiver Design  (pdf, 262 kB) Application Notes PDF
Design A Clock-Distribution Strategy With Confidence
by Demetrios Efstathiou (Electronic Design, April 27, 2006)
Technical Articles HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD6636 IBIS Model IBIS Models HTML
AD6636 BSDL File  (txt, 40 kB) BSDL Files TXT

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

AD6636 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD6636BBC Status: Obsolete 256 Ball CSPBGA (17x17mm) 256 Ind Tray, 90 - - N  Material Info Notify Me Contact ADI
AD6636BBCZ Status: Production 256 Ball CSPBGA (17x17mm) 256 Ind Tray, 90 $60.65 $51.40 Y  Material Info PCN Purchase
AD6636CBC Status: Obsolete 256 Ball CSPBGA (17x17mm) 256 Ind Tray, 90 - - N  Material Info Notify Me Purchase
AD6636CBCZ Status: Production 256 Ball CSPBGA (17x17mm) 256 Ind Tray, 90 $40.42 $34.25 Y  Material Info PCN Purchase
Price Table Help

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.

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