COMPANDER
S1T8507C
1
INTRODUCTION
S1T8507C is a automatic gain control system that is used for dynamic
range compression and expansion.
By companding the signal , this can reduce the noise components.
S1T8507C includes compressor, expander, pre-amp, filter amp, limiter
and mute/bypath logic.
FEATURES
Wide Supply Voltage ( 2.4 to 7V )
Easy Gain Control
Mute/Bypath Logic
Data In/Out Pin
ORDERING INFORMATION
Device
Package
Operating Temperature
S1T8507C01-D0B0
20
-
DIP
-
300A
-
20
C to +70
C
S1T8507C01-S0B0
20
-
SOP
-
375
20
-
DIP
-
300A
20
-
SOP
-
375
COMPANDER
S1T8507C
3
PIN DESCRIPTION
ABSOLUTE MAXIMUM RATINGS
Pin No
Symbol
Description
Pin No
Symbol
Description
1
FO
Filter Amp Output
11
CMUTE
Compressor Mute
2
FI
Filter Amp Input
12
BYPATH
No companding
3
CO
Compressor Output
13
EMUTE
Expander Mute
4
DI
Data Input
14
EB
Expander Reference Bias
5
AGIC
AC Gain Infinity Capacitor
15
EPI +
Expander Non-Inverting Input
6
CRC
Compressor Rectifier Capacitor
16
EPI
-
Expander Inverting Input
7
CPI
-
Compressor Inverting Input
17
DO
Data Output
8
CPI +
Compressor Non-Inverting Input
18
ERC
Expander Rectifier Capacitor
9
CB
Compressor Reference Bias
19
EO
Expander Output
10
GND
Ground
20
V
CC
Supply Voltage
Characteristic
Symbol
Value
Unit
Supply Voltage
V
CC
10
V
Power Dissipation S1T8507C01-D0B0
P
D
1000
mW
S1T8507C01-S0B0
410
Operating Temperature
T
OPR
-
20 to + 70
C
Storage Temperature
T
STG
-
55 to + 150
C
S1T8507C
COMPANDER
4
ELECTRICAL CHARACTERISTICS
(V
CC
= 3V, f = 1kHz, Ta = 25
C, unless otherwise noted)
Characteristic
Symbol
Test Condition
Min.
Typ.
Max.
Unit
DC ELECTRICAL CHARACTERISTICS
Operating Voltage
V
CC
-
-
2.4
7.0
V
Operating Current
I
CC
No Signal
-
4.0
6.5
mA
COMPRESSOR PART
Standard Input Voltage (0dB)
V
I (COMP)
V
CC
= 300mVrms = 0dB
8.0
12.5
17.0
mVrms
Gain Difference
G
V1 (COMP)
Vin =
-
20dB
-
0.5
0
+0.5
dB
G
V2 (COMP)
Vin =
-
40dB
-
1.0
0
+1.0
Bypath Gain Difference
G
VB (COMP)
Vin = 0dB, BYPATH = GND
-
1.5
0
+1.5
dB
Output Distortion
THD
COMP
Vin = 0dB
-
0.5
1.0
%
Noise Output Voltage
V
NO (COMP)
Rg = 620ohm
-
3.0
5.5
mVrms
Mute Attenuation Ratio
ATT
MUTE
Vin = 0dB, CMUTE = GND
60
80
-
dB
Limiting Voltage
V
LIM (COMP)
-
1.15
1.35
1.50
Vp-p
EXPANDER PART
Standard Output Level (0dB)
V
O (EXP)
Vin = 30mVrms = 0dB
110
130
160
mVrms
Gain Difference
G
V1 (EXP)
Vin =
-
10dB-0.5
-
0.5
0
+0.5
dB
G
V2 (EXP)
Vin =
-
20dB
-
1.0
0
+1.0
G
V3 (EXP)
Vin =
-
30dB
-
1.5
0
+2.0
Bypath Gain Difference
G
VB (EXP)
Vin = 0dB, BYPATH = GND
-
2.5
0
+0.5
dB
Output Distortion
THD
EXP
Vin = 0dB
-
0.5
1.5
%
Noise Output Voltage
V
NO (EXP)
Rg = 620ohm
-
10.0
30.0
Vrms
Mute Attenuation Ratio
ATT
MUTE
Vin = 0dB, EMUTE = GND
60
80
-
dB
Max. Output Voltage
V
OEXP (MAX)
THD = 10%
700
800
-
mVrms
PDF 
ZIP
