参数资料
| 型号： | SA572N |
| 厂商： | ON Semiconductor |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC COMPANDOR 2CHAN GAIN 16-DIP |
| 产品变化通告： | Product Obsolescence 11/Feb/2009 |
| 标准包装： | 25 |
| 类型： | 压缩扩展器 |
| 应用： | 自动电平控制，立体声扩展器 |
| 安装类型： | 通孔 |
| 封装/外壳： | 16-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 16-DIP |
| 包装： | 管件 |
SA572
http://onsemi.com
7
Basic Expandor
Figure 6 shows an application of the circuit as a simple
expandor. The gain expression of the system is given by:
VOUT
VIN
+ 2I
1
@
R3 @ VIN(AVG)
R2 @ R1
2
(eq. 4)
(I1 = 140 mA)
Both the resistors R1 and R2 are tied to internal summing
nodes. R1 is a 6.8 kW internal resistor. The maximum input
current into the gain cell can be as large as 140
mA. This
corresponds to a voltage level of 140
mA6.8 kW = 952 mV
peak. The input peak current into the rectifier is limited to
300
mA by the internal bias system. Note that the value of
R1 can be increased to accommodate higher input level. R2
and R3 are external resistors. It is easy to adjust the ratio of
R3/R2 for desirable system voltage and current levels. A
small R2 results in higher gain control current and smaller
static and dynamic tracking error. However, an impedance
buffer A1 may be necessary if the input is voltage driven
with large source impedance.
The gain cell output current feeds the summing node of
the external OPA A2. R3 and A2 convert the gain cell output
current to the output voltage. In high-performance
applications, A2 has to be low-noise, high-speed and wide
band so that the high-performance output of the gain cell
will not be degraded. The non-inverting input of A2 can be
biased at the low noise internal reference Pin 6 or 10.
Resistor R4 is used to bias up the output DC level of A2 for
maximum swing. The output DC level of A2 is given by:
V
OUT DC + VREF 1 )
R3
R4 *
VB
R3
R4
(eq. 5)
VB can be tied to a regulated power supply for a dual
supply system and be grounded for a single supply system.
CA sets the attack time constant and CR sets the recovery
time constant.
+
A1
(7,9)
(3,13)
(8)
(16)
(4,12)
(2,14)
(6,10)
(5,11)
BUFFER
A2
VOUT
VIN
CIN1
CIN2
CIN3
VREF
+VB
+VCC
DG
10mF
1mF
2.2mF
Figure 6. Basic Expandor Schematic
R5
100kW
R2
3.3kW
6.8kW
17.3kW
1kW
R4
R3
R1
R6
C1
CR
CA
2.2mF
Basic Compressor
Figure 7 shows the hook-up of the circuit as a
compressor. The IC is put in the feedback loop of the OPA
A1. The system gain expression is as follows:
V
OUT
VIN +
I1
2 @
R2 @ R1
R3 @ VIN(AVG)
1
2
(eq. 6)
(I1 = 140 mA)
RDC1, RDC2, and CDC form a DC feedback for A1. The
output DC level of A1 is given by:
V
OUT DC + VREF 1 )
R
DC1 ) RDC2
R4
* VB @
R
DC1 ) RDC2
R4
(eq. 7)
The zener diodes D1 and D2 are used for channel
overload protection.
相关PDF资料 |
PDF描述 |
|---|---|
| SA575NG | IC COMPANDOR 2CHAN GAIN 20-DIP |
| SI4113-D-ZT1 | IC SYNTHESIZER RF1/RF2 24TSSOP |
| SI51210-A01AFM | IC CLK GEN FACTORY CONFIG 6TDFN |
| SI51211-A01AFM | IC CLK GEN FACTORY CONFIG 8TDFN |
| SI51214-A01AFM | IC CLK GEN FACTORY CONFIG 6TDFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SA572NG | 功能描述:音频放大器 Dual Channel Hi Perf Compandor Ind. Temp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| SA575 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low voltage compandor |
| SA5751D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Cell-Phone Circuit |
| SA5752 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Audio processor - companding, VOX and amplifier section |
| SA5752D | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Audio processor-companding, VOX and amplifier section |
发布紧急采购，3分钟左右您将得到回复。