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參數(shù)資料
| 型號： | TDA9874APS |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 接收器 |
| 英文描述： | Digital TV sound demodulator/decoder |
| 中文描述： | AM/FM, AUDIO DEMODULATOR, PDIP42 |
| 封裝： | 0.600 INCH, SHRINK, PLASTIC, MS-020, SOT-270-1, DIP-42 |
| 文件頁數(shù)： | 29/68頁 |
| 文件大小： | 231K |
| 代理商： | TDA9874APS |
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1999 Dec 03
29
Philips Semiconductors
Preliminary specification
Digital TV sound demodulator/decoder
TDA9874A
10.3.2
AGC G
AIN
R
EGISTER
(AGCGR)
If the Automatic Gain Control (AGC) function is switched off in the general configuration register (see Section 10.3.3) the
contents of this register defines a fixed gain of the SIF input stage. The input voltages given are meant to generate a
nearly full-scale output from the SIF ADC. If the AGC is on, the AGC gain setting is ignored. After switching off the AGC
function, the latest gain control setting is copied to the AGC gain register. If the AGC input level shift bit (AGCLEV) is set
to HIGH the input signal is scaled with
10 dB. The AGCLEV bit is also active if the AGC function is enabled.
The default setting after power-on reset is ‘0000 0000’.
InTable 16thestated stepnumber corresponds with theSIFlevel readfromsubaddress 7(see Section 10.4.6);the input
voltages should be considered as approximate target values.
Table 14
AGC gain register (subaddress 0)
Table 15
Description of the AGCGR bits
7
6
5
4
3
2
1
0
0
0
AGCLEV
AGCB4
AGCB3
AGCB2
AGCB1
AGCB0
BIT
NAME
AGCLEV
DESCRIPTION
7
6
5
this bit is not used and should be set to a logic 0
this bit is not used and should be set to a logic 0
If the AGC input level shift bit AGCLEV is set to HIGH the input signal is scaled with
10 dB. The AGCLEV bit is also active if the automatic gain function is enabled.
If the automatic gain control function is switched off in the general configuration register,
the contents of this register will define a fixed gain of the AGC stage.
4
3
2
1
0
AGCB4
AGCB3
AGCB2
AGCB1
AGCB0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9874H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV sound demodulator/decoder |
| TDA9875 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV Sound Processor DTVSP |
| TDA9875A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV Sound Processor DTVSP |
| TDA9875AH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital TV Sound Processor DTVSP |
| TDA9875AH/V2,557 | 功能描述:IC SOUND PROC DGTL TV 64QFP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻處理 系列:- 其它有關(guān)文件:STA321 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:Sound Terminal™ 類型:音頻處理器 應(yīng)用:數(shù)字音頻 安裝類型:表面貼裝 封裝/外殼:64-LQFP 裸露焊盤 供應(yīng)商設(shè)備封裝:64-LQFP EP（10x10） 包裝:Digi-Reel® 其它名稱:497-11050-6 |
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