- 您現在的位置：買賣IC網 > PDF目錄373969 > AD9870 (ANALOG DEVICES INC) IF Digitizing Subsystem PDF資料下載
參數資料
| 型號： | AD9870 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 通信及網絡 |
| 英文描述： | IF Digitizing Subsystem |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP48 |
| 封裝： | 1.40 MM HEIGHT, PLASTIC, TQFP-48 |
| 文件頁數： | 17/20頁 |
| 文件大小： | 233K |
| 代理商： | AD9870 |
REV. 0
AD9870
–17–
0
–
20
–
40
–
60
–
80
–
100
10
–
4
10
–
3
10
–
2
10
–
1
BASEBAND FREQUENCY
–
Relative to
f
CLK
d
Figure 13b. Decimator Frequency Response
0
–
20
–
40
–
60
–
80
–
100
0.50
0.25
0
NORMALIZED FREQUENCY
–
Relative to
f
OUT
d
Figure 13c. Folded Decimator Frequency Response
As Figure 13d shows, the gain variation across the passband
is approximately 0.4 dB. Normalization of full-scale is accurate
to within 0.4 dB across all decimation modes.
NORMALIZED FREQUENCY
–
Relative to
f
OUT
–
40
–
100
0
–
20
0
–
60
–
80
0.25
d
Figure 13d. Passband Frequency Response of the
Decimator
Evaluation Board and Software
The evaluation board along with its accompanying software
provide a simple means to evaluate the AD9870. The block
diagram in Figure 14 shows the major blocks of the evaluation
board. The evaluation board is designed to be flexible allowing
the user to configure it for different potential applications. The
power supply distribution block provides filtered, adjustable
voltages to the various supply pins of the AD9870. In the IF
Input signal path, component pads are available to implement
different IF impedance matching networks. The LO and CLK
signals can be externally applied or internally derived from a
user-supplied VCO Module interface daughter board. The refer-
ence for the on-chip LO and CLK synthesizers can be applied
via the external FREF input or an on-board crystal oscillator.
MIXER
OUTPUT
IF
INPUT
LO
INPUT
AD9870
OR
AD9874
VCO
MODULE
INTERFACE
CRYSTAL
OSCILLATOR
IDT
FIFO
(OPTIONAL)
AD9870/AD9874
POWER SUPPLY
DISTRIBUTION
EPROM
CLK
INPUT
FREF
INPUT
NIDAQ
68-PIN
CONNECTOR
XILINX
SPARTON
FPGA
Figure 14. Evaluation Board Platform
The evaluation board is designed to interface to a PC via a
National Instruments PCI-DIO-32HS digital IO card. A XILINX
FPGA formats the data between the AD987x and digital I/O
board. Software developed using National Instruments LabVIEW
and provided as MS Windows executable programs is supplied
for the configuration of the SPI port registers and evaluation
of the AD9870 output data. These programs have a convenient
graphical user interface allowing for easy access to the various
SPI port configuration registers and real time frequency analysis
of output data.
相關PDF資料 |
PDF描述 |
|---|---|
| AD9870EB | IF Digitizing Subsystem |
| AD9873 | Analog Front End Converter for Set-Top Box, Cable Modem |
| AD9873-EB | Analog Front End Converter for Set-Top Box, Cable Modem |
| AD9873JS | Analog Front End Converter for Set-Top Box, Cable Modem |
| AD9874 | IF Digitizing Subsystem |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD9870AST | 制造商:Rochester Electronics LLC 功能描述:GENERAL PURPOSE IF SUBSYSTEM - Tape and Reel 制造商:Analog Devices 功能描述: |
| AD9870EB | 制造商:AD 制造商全稱:Analog Devices 功能描述:IF Digitizing Subsystem |
| AD9873 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Analog Front End Converter for Set-Top Box, Cable Modem |
| AD9873-EB | 制造商:Analog Devices 功能描述: |
| AD9873JS | 制造商:Analog Devices 功能描述: |
發布緊急采購，3分鐘左右您將得到回復。