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參數(shù)資料
| 型號： | SA575DTBR2G |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC COMPANDOR 2CHAN GAIN 20-TSSOP |
| 標準包裝： | 1 |
| 類型： | 壓縮擴展器 |
| 應用： | 蜂窩式無線電，混頻器 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 20-TSSOP |
| 包裝： | 標準包裝 |
| 其它名稱： | SA575DTBR2GOSDKR |
SA575
http://onsemi.com
6
Compressor
The typical compressor configuration is shown in
Figure 3. In this mode, the rectifier cell and variable gain
cell are in the feedback path. R6 and R7 provide the DC
feedback to the summing amplifier. The input is AC
coupled through C12 and output is AC coupled through C8.
In a system with inputs and outputs AC coupled, C8 and C12
could be eliminated and only R6, R7, C7, and C13 would be
required. If the external components R6, R7 and C7 are
eliminated, then the output of the summing amplifier will
motor-boat in absence of signals or at extremely low
signals. This is because there is no DC feedback path from
the output to input. In the presence of an AC signal this
phenomenon is not observed and the circuit will appear to
function properly.
The compressor gain expression and the attack and
release time constant is given by Equation 3 and
Equation 4, respectively.
(eq. 3)
4VIN(avg)
3.8 k
W x 100 mA
where VIN(avg) = 0.95VIN(RMS)
1/2
Compressor gain =
(eq. 4)
tR = tA = 10 kW x CRECT = 10 kW x C4
2.2
mF
4.7
mF
10
mF
10
mF
1
mF
VREF
S
DG
C7
8
12
14
COMP IN
COMP OUT
11
16
15
13
Figure 3. Typical Compressor Configuration
10k
W
10k
W
3.8k
W
30k
W
30k
W
C12
R6
R7
C8
C13
C9
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SA575N | 功能描述:音頻放大器 3-7V Precision Dual RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| SA575NG | 功能描述:音頻放大器 3-7V Precision Dual Gain Compandor RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| SA576 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low power compandor |
| SA57608 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One-cell Lithium-ion battery protection with over/undercharge and overcurrent protection |
| SA57608XD | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One-cell Lithium-ion battery protection with over/undercharge and overcurrent protection |
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