SA575N ON Semiconductor, SA575N Datasheet - Page 7

• Manufacturer Part Number: SA575N
• Description: IC COMPANDOR 2CHAN GAIN 20-DIP
• Manufacturer: ON Semiconductor
• Type: Compandorr

Specifications of SA575N

• Applications: Cellular Radio, Mixers
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Automatic Level Control
configuration is shown in Figure 4. It can be seen that it is
quite similar to the compressor schematic except that the
input to the rectifier cell is from the input path and not from
the feedback path. The input is AC coupled through C
and C
again, as in the previous cases, if the system input and
output signals are already AC coupled, then C
C
removing R
8
The
could be eliminated. Concerning the compressor,
13
and the output is AC coupled through C
typical
6
ALC IN
, R
7
Automatic
and C
C
C
4.7mF
V
10mF
12
13
REF
7
will cause motor-boating in
16
13
Level
8
10kW
3.8kW
Control
Figure 4. Typical ALC Configuration
C
12
15
9
D
, C
G
8
. Once
http://onsemi.com
circuit
13
2.2mF
and
12
12
SA575
10kW
30kW
S
R
7
6
absence of signals. C
summing amplifier at higher input levels. This circuit
provides an input dynamic range greater than 60 dB with
the output within "0.5 dB typical. The necessary design
expressions are given by Equation 5 and Equation 6,
respectively.
C7
C COMP
22pF
11
14
1mF
30kW
R
t
7
R
ALC gain =
= t
A
= 10 kW x C
COMP
10mF
C
3.8 kW x 100 mA
8
is necessary to stabilize the
RECT
4V
IN
= 10 kW x C
(avg)
9
ALC OUT
(eq. 5)
(eq. 6)