AD6636(Rev0) Просмотр технического описания (PDF) - Analog Devices

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AD6636
(Rev.:Rev0)

150 MSPS Wideband Digital Down-Converter (DDC)

Analog Devices 

AD6636

The overall filter response for the AD6636 is the composite of

all the combined filter stages. Each successive filter stage is

capable of narrower transition bandwidths, but requires a

greater number of CLK cycles to calculate the output. More

decimation in the first filter stage minimizes overall power

consumption. Data from the device is interfaced to a

DSP/FPGA/baseband processor via either high speed parallel

ports (preferred) or a DSP-compatible microprocessor interface.

The AD6636 is available both in 4-channel and 6-channel

versions. The data sheet primarily discusses the 6-channel part.

The only difference between the 6-channel and 4-channel

devices is that on the 4-channel version, Channels 4 and 5 are

not available (see Figure 1). The 4-channel device still has the

same input ports, output ports, and memory map. The memory

map section for Channels 4 and 5 can be programmed and read

back, but it serves no purpose.

PRODUCT HIGHLIGHTS

• Six independent digital filtering channels

• 101 dB SNR noise performance, 110 dB spurious

performance

• Four input ports capable of 150 MSPS input data rates

• RMS/peak power monitoring of input ports and 96 dB

range AGCs before the output ports

• Three programmable RAM coefficient filters, three half-

band filters, two fixed coefficient filters, and one fifth-order

CIC filter per channel

• Complex filtering and biphase filtering (300 MSPS ADC

input) by combining filtering capability of multiple

channels

• Three 16-bit parallel output ports operating at up to

200 MHz clock

• Blackfin®- and TigerSHARC®-compatible 16-bit

microprocessor port

• Synchronous serial communications port is compatible

with most serial interface standards, SPORT, SPI, and SSR

Rev. 0 | Page 4 of 72

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