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PDF SA575 Data sheet ( Hoja de datos )
| Número de pieza | SA575 | |
| Descripción | Low Voltage Compandor | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SA575 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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SA575
Low Voltage Compandor
The SA575 is a precision dual gain control circuit designed for low
voltage applications. The SA575’s channel 1 is an expandor, while
channel 2 can be configured either for expandor, compressor, or
automatic level controller (ALC) application.
Features
• Operating Voltage Range from 3.0 V to 7.0 V
• Reference Voltage of 100 mVRMS = 0 dB
• One Dedicated Summing Op Amp Per Channel and Two Extra
Uncommitted Op Amps
• 600 W Drive Capability
• Single or Split Supply Operation
• Wide Input/Output Swing Capability
• Pb−Free Packages are Available*
Applications
• Portable Communications
• Cellular Radio
• Cordless Telephone
• Consumer Audio
• Portable Broadcast Mixers
• Wireless Microphones
• Modems
• Electric Organs
• Hearing Aids
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*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques Reference
Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2006
September, 2006 − Rev. 3
1
http://onsemi.com
20
1
SOIC−20 WB
D SUFFIX
CASE 751D
20
1
TSSOP−20
DTB SUFFIX
CASE 948E
20
1
PDIP−20
N SUFFIX
CASE 738
PIN CONNECTIONS
D* and DTB Packages
+VIN1 1
-VIN1 2
VOUT1 3
RECT. IN1 4
CRECT1 5
SUM OUT 1 6
COMP. IN1 7
VREF 8
GAIN CELL IN1 9
GND 10
20 VCC
19 +VIN2
18 -VIN2
17 VOUT2
16 RECT.IN2
15 CRECT2
14 SUM OUT2
13 COMP.IN2
12 SUM NODE 2
11 GAIN CELL IN2
*Available in large SOL package only.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 13 of this data sheet.
Publication Order Number:
SA575/D
1 page  
SA575
Expandor
The typical expandor configuration is shown in Figure 2.
The variable gain cell and the rectifier cell are in the signal
input path. The VREF is always 1/2 VCC to provide the
maximum headroom without clipping. The 0 dB ref is
100 mVRMS. The input is AC coupled through C5, and the
output is AC coupled through C3. If in a system the inputs
and outputs are AC coupled, then C3 and C5 can be
eliminated, thus requiring only one external component,
C4. The variable gain cell and rectifier cell are DC coupled
so any offset voltage between Pins 4 and 9 will cause small
offset error current in the rectifier cell. This will affect the
accuracy of the gain cell. This can be improved by using an
extra capacitor from the input to Pin 4 and eliminating the
DC connection between Pins 4 and 9.
The expandor gain expression and the attack and release
time constant is given by Equation 1 and Equation 2,
respectively.
Expandor gain =
4VIN(avg) 2
3.8 kW x 100 mA
(eq. 1)
where VIN(avg) = 0.95VIN(RMS)
tR = tA = 10 kW x CRECT = 10 kW x C4
(eq. 2)
EXP IN
C5
10mF
9, 11
10kW
DG
7, 13
10kW
S 6, 14
4, 16
3.8kW
5, 15
C4 2.2mF
8
VREF
C3
10mF
Figure 2. Typical Expandor Configuration
EXP OUT
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5
5 Page 
8
6
4
2
0
−2
−4
−6
−8
−10
−12
−14
−16
−18
−20
−22
10
SA575
TYPICAL PERFORMANCE CHARACTERISTICS
2.5dB IN
0dB IN
INPUT
(20−20kHz)
GENERAL DIAGRAM
4.7mF
10mF
REC
DG
OUTPUT
SUM
VCC = 5V
-10dB IN
100 1000
FREQUENCY (Hz)
10000
30000
Figure 9. Expandor Output Frequency Response
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11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet SA575.PDF ] | |
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