參數資料
型號: ZL10036LDG1
廠商: ZARLINK SEMICONDUCTOR INC
元件分類: 消費家電
英文描述: Digital Satellite Tuner with RF Bypass
中文描述: SPECIALTY CONSUMER CIRCUIT, QCC40
封裝: 6 X 6 MM, LEAD FREE, QFN-40
文件頁數: 13/38頁
文件大?。?/td> 939K
代理商: ZL10036LDG1
ZL10036
Data Sheet
13
Zarlink Semiconductor Inc.
The baseband post-filter gain stage can be used to provide additional gain to maintain desired output amplitude
with lower symbol rate applications.
Figure 4 - AGC Control Structure
2.2.1 RF
The RF input amplifier feeds an AGC stage, which provides for RF gain control.
Figure 5 - Typical First Stage RF AGC Response
The RF AGC is divided into two stages. The first stage is a continually variable gain control stage, which is
controlled by the AGC sender and provides the main system AGC set under control of the analogue AGC signal
generated by the demodulator section. The second stage is a bus programmable, two position gain set previous to
the quadrature mixer and provides for 4 dB of gain adjust under software control.
The analogue RF AGC is optimized for S/N and S/I performance across the full dynamic range. The RF AGC
characteristic, variation of IIP2, IIP3 and NF are contained in Figure 6, Figure 7 & Figure 8 respectively.
The RF preamplifier is also coupled to the selectable RF bypass, which is described in “RF bypass” on page 16.
The specified electrical parameters of the RF input are unaffected by the RF bypass state.
Normalized gain
range in dB:
Gain function:
0 - 72
0 or +4
0 to 12.6 in 4.2 dB steps
0 to 12.6 in 4.2 dB steps
RF AGC
Stepped
Stepped
Stepped
Control
function:
Analogue
voltage
I2C bus
I2C bus
I2C bus
-80
-70
-60
-50
-40
-30
-20
-10
0
10
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
AGC control voltage V
C
相關PDF資料
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ZL10039LCF1 MULTIMETER, DIGITAL; Accuracy, AC current range:+/-(1.5% + 3d); Accuracy, AC voltage range:+/-(1.3% + 5d); Accuracy, DC current range:+/-(1.5% + 3d); Accuracy, DC voltage range:+/-(0.8% + 3d); Accuracy, resistance range:+/-(1.5% + RoHS Compliant: NA
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ZL10039LCG1 Test, Recorder RoHS Compliant: NA
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