參數(shù)資料
型號: STLC5048
廠商: 意法半導(dǎo)體
元件分類: Codec
英文描述: FULLY PROGRAMMABLE FOUR CHANNEL CODEC AND FILTER
中文描述: 完全可編程四通道解碼器和過濾器
文件頁數(shù): 40/45頁
文件大小: 371K
代理商: STLC5048
STLC5048
40/45
(As reported in the absolute gain levels with 61Vrms at VFXI and GX=0dB, the DX output is 0dBm0).
For instance let's calculate which TX gain to program if +4.2dBr @ 600 Ohm is to be set:
VLINE = 0dBm @ 600Ohm
In case of STLC3080 the scaling factor is 100 (instead of 50) while the Rs value is 8200 (instead of 4100) so
the result is the same.
Refering to the formula (1), to have DX equal to 4.2dB with VLINE=0dBm GX must be set to GX = 4.2 - 4.78 =
-0.58dB.
Figure 10. Absolute gain in TX path.
VFXI
VLINE
600
------------------
1
50
------
4100
=
VFXI
600
------------------
100
---------
8200
=
VLINE
D00TL474
Iline
R
S
4100
(8200 for
STLC3080)
VFXI
VFXI = (-Iline/50)*4100 for L3235N
VFXI = (-Iline/100)*8200 for STLC3080
GX
TXG
1/100 for
STLC3080
1/50
DX
Zadm
STLC5048
L3235N
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