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AD6622S/PCB 数据表(PDF) 1 Page - Analog Devices |
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AD6622S/PCB 数据表(HTML) 1 Page - Analog Devices |
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1 / 28 page  REV. 0 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. a AD6622 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2000 Four-Channel, 75 MSPS Digital Transmit Signal Processor (TSP) FUNCTIONAL BLOCK DIAGRAM CH A CH B CH C CH D RCF NCO 18 18 PORT CIC FILTER SPORT SPORT SPORT SPORT RCF RCF RCF CIC FILTER CIC FILTER CIC FILTER NCO NCO NCO JTAG FEATURES Wideband Digital IF Parallel Output Wideband Digital IF Parallel Input Allows Cascade of Chips for Additional Channels Programmable IF and Modulation for Each Channel Programmable Interpolating RAM Coefficient Filter High-Speed CIC Interpolating Filter NCO Frequency Translation Worst Spur Better than 100 dBc Tuning Resolution Better than 0.02 Hz Real or Complex Outputs Digital Summation of Channels Clipped or Wrapped Overrange Two’s Complement or Offset Binary Output Separate 3-Wire Serial Data Input for Each Channel Microprocessor Control JTAG Boundary Scan APPLICATIONS Cellular/PCS Base Stations Micro/Pico Cell Base Stations WBCDMA Wireless Local Loop Base Stations Phase Array Beam Forming Antennas PRODUCT DESCRIPTION The AD6622 comprises four identical digital Transmit Signal Processors (TSPs) complete with synchronization circuitry and cascadable wideband channel summation. An external digital- to-analog converter (DAC) is all that is required to complete a wide band digital up-converter. On-chip tuners allow the relative phase and frequency for each RF carrier to be independently controlled. Each TSP has three cascaded signal processing elements: a RAM-programmable Coefficient interpolating Filter (RCF), a programmable Cascaded Integrator Comb (CIC) interpolating filter, and a Numerically Controlled Oscillator/tuner (NCO). The outputs of the four TSPs are summed and scaled on-chip. In multichannel wideband transmitters, multiple AD6622s may be combined using the chip’s cascadable output summation stage. Each channel provides independent serial data inputs that may be directly connected to the serial port of DSP chips. User pro- grammable FIR filters can be used to filter linear inputs. All control registers and coefficient values are programmed through a generic microprocessor interface. Two microprocessor bus modes are supported. All inputs and outputs are LVCMOS compatible. All outputs are LVCMOS and 5 V TTL compatible. |
类似零件编号 - AD6622S/PCB |
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类似说明 - AD6622S/PCB |
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