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參數資料
型號: AD9877
廠商: Analog Devices, Inc.
英文描述: Mixed-Signal Front End Set-Top Box, Cable Modem
中文描述: 混合信號前端機頂盒,電纜調制解調器
文件頁數: 21/36頁
文件大小: 1094K
代理商: AD9877
AD9877
Table 7. Cable Driver Gain Control
Bits [7:4]
CA Interface Transmit Word
0000
0000 0000 (default)
0001
0000 0001
0010
0000 0010
0011
0000 0100
0100
0000 1000
0101
0001 0000
0110
0010 0000
0111
0100 0000
1000
1000 0000
Rev. B | Page 21 of 36
In this mode, the lower bits determine the fine gain setting of
the DAC output.
Table 8. DAC Output Fine Gain Setting
Bits [3:0]
DAC Fine Gain
0000
0.0 dB (default)
0001
0.5 dB
0010
1.0 dB
0011
1.5 dB
...
...
1110
7.0 dB
1111
7.5 dB
New data is automatically sent over the 3-wire CA interface
(and DAC gain adjust) whenever the value of the active gain
control register changes or a new profile is selected. The default
value is 0x00 (lowest gain).
The formula for the combined output level calculation of the
AD9877 fine gain and the AD8327 or AD8322 coarse gain is
V
8327
=
V
9877(0)
+ (
fine
)/2 + 6(
coarse
) 19
V
8322
=
V
9877(0)
+ (
fine
)/2 + 6(
coarse
) 14
where:
fine
is the decimal value of Bits [3:0].
coarse
is the decimal value of Bits [7:8].
V
9877(0)
is the level at AD9877 output in dBmV for
fine
= 0.
V
8327
is the level at output of the AD8327 in dBmV.
V
8322
is the level at output of the AD8322 in dBmV.
相關PDF資料
PDF描述
AD9877ABS Mixed-Signal Front End Set-Top Box, Cable Modem
AD9877-EB Mixed-Signal Front End Set-Top Box, Cable Modem
AD9882KST-100 Dual Interface for Flat Panel Displays
AD9882KST-140 Dual Interface for Flat Panel Displays
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相關代理商/技術參數
參數描述
AD9877ABS 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述:
AD9877ABS-1 制造商:Analog Devices 功能描述:
AD9877ABSZ 功能描述:IC PROCESSOR FRONT END 100MQFP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模擬前端 (AFE) 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 位數:- 通道數:2 功率(瓦特):- 電壓 - 電源,模擬:3 V ~ 3.6 V 電壓 - 電源,數字:3 V ~ 3.6 V 封裝/外殼:32-VFQFN 裸露焊盤 供應商設備封裝:32-QFN(5x5) 包裝:帶卷 (TR)
AD9877BS 制造商:Analog Devices 功能描述:
AD9877-EB 制造商:Analog Devices 功能描述:
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