- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373890 > AD6620 (ANALOG DEVICES INC) 65 MSPS Digital Receive Signal Processor(采樣速率65MSPS的數(shù)字接收信號(hào)處理器) PDF資料下載
參數(shù)資料
| 型號(hào)： | AD6620 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | 65 MSPS Digital Receive Signal Processor(采樣速率65MSPS的數(shù)字接收信號(hào)處理器) |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP80 |
| 封裝： | PLASTIC, QFP-80 |
| 文件頁(yè)數(shù)： | 3/43頁(yè) |
| 文件大?。?/td> | 388K |
| 代理商： | AD6620 |
第1頁(yè)第2頁(yè)當(dāng)前第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)
AD6620
–3–
REV. 0
Following CIC2 is the second fixed-coefficient decimating filter.
This filter, CIC5, further reduces the sample rate by a program-
mable ratio from 1 to 32. The data rate out of CIC5, f
SAMP5
, is
determined by the decimation factors of M
CIC5
and M
CIC2
.
Each CIC stage is a FIR filter whose response is defined by the
decimation rate. The purpose of these filters is to reduce the
data rate of the incoming signal so that the final filter stage, a
FIR RAM coefficient sum-of-products filter (RCF), can calcu-
late more taps per output. As shown in Figure 1, on-chip multi-
plexers allow both CIC filters to be bypassed if a multirate clock
is used.
The fourth stage is a sum-of-products FIR filter with program-
mable 20-bit coefficients, and decimation rates programmable
from 1 to 32. The RAM Coefficient FIR Filter (RCF in Figure
1) can handle a maximum of 256 taps.
The overall filter response for the AD6620 is the composite of
all three cascaded decimating filters: CIC2, CIC5, and RCF.
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 will
minimize overall power consumption. Data comes out via a
parallel port or a serial interface.
Figure 2 illustrates the basic function of the AD6620: to select
and filter a single channel from a wide input spectrum. The
frequency translator “tunes” the desired carrier to baseband.
CIC2 and CIC5 have fixed order responses; the RCF filter
provides the sharp transitions. More detail is provided in later
sections of the data sheet.
–f
S
/2
–3f
S
/8
–5f
S
/16
–f
S
/4
–3f
S
/16
–f
S
/8
–f
S
/16
DC
f
S
/16
f
S
/8
3f
S
/16
f
S
/4
5f
S
/16
f
S
/2
3f
S
/8
SIGNAL OF
INTEREST
SIGNAL OF INTEREST "IMAGE"
WIDEBAND INPUT SPECTRUM
(–f
samp/
2 TO f
samp/
2)
D'
C'
B'
A'
A
C
B
D
Figure 2a. Wideband Input Spectrum (e.g., 30 MHz from High Speed ADC)
–f
S
/2
–3f
S
/8
–5f
S
/16
–f
S
/4
–3f
S
/16
–f
S
/8
–f
S
/16
DC
f
S
/16
f
S
/8
3f
S
/16
f
S
/4
5f
S
/16
f
S
/2
3f
S
/8
AFTER FREQUENCY TRANSLATION
NCO "TUNES" SIGNAL TO BASEBAND
A
B
C
D
D'
C'
B'
A'
Figure 2b. Frequency Translation (e.g. Single 1 MHz Channel Tuned to Baseband)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
CIC2, CIC5, AND RCF
d
FREQUENCY
Figure 2c. Baseband Signal is Decimated and Filtered by CIC2, CIC5, RCF
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD6622AS | Four-Channel, 75 MSPS Digital Transmit Signal Processor TSP |
| AD6622PCB | Four-Channel, 75 MSPS Digital Transmit Signal Processor TSP |
| AD6622S | Four-Channel, 75 MSPS Digital Transmit Signal Processor TSP |
| AD6622 | Four-Channel, 75 MSPS Digital Transmit Signal Processor TSP |
| AD6623 | 4-Channel, 104 MSPS Digital Transmit Signal Processor TSP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD6620_01 | 制造商:AD 制造商全稱:Analog Devices 功能描述:67 MSPS Digital Receive Signal Processor |
| AD6620AS | 制造商:Analog Devices 功能描述:Signal Processor 80-Pin PQFP 制造商:Rochester Electronics LLC 功能描述:DUAL CHANNEL DECIMATING RECEIVER - Bulk 制造商:Analog Devices 功能描述:IC SIGNAL PROCESSOR |
| AD6620AS-REEL | 制造商:Analog Devices 功能描述:Signal Processor 80-Pin PQFP T/R |
| AD6620ASZ | 功能描述:IC DGTL RCVR DUAL 67MSPS 80-PQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 特色產(chǎn)品:NXP - I2C Interface 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:2 通道 I²C 多路復(fù)用器 接口:I²C，SM 總線 電源電壓:2.3 V ~ 5.5 V 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:剪切帶 (CT) 安裝類型:表面貼裝 產(chǎn)品目錄頁(yè)面:825 (CN2011-ZH PDF) 其它名稱:568-1854-1 |
| AD6620ASZ-REEL | 功能描述:IC DGTL RCVR DUAL 67MSPS 80-PQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 特色產(chǎn)品:NXP - I2C Interface 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:2 通道 I²C 多路復(fù)用器 接口:I²C，SM 總線 電源電壓:2.3 V ~ 5.5 V 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:剪切帶 (CT) 安裝類型:表面貼裝 產(chǎn)品目錄頁(yè)面:825 (CN2011-ZH PDF) 其它名稱:568-1854-1 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。