COMPANDER
KA8507B
INTRODUCTION
20−DIP−300A
KA8507B is a automatic gain control system that is used for dynamic
range compression and expansion. According to the companding the
signal, this can reduce the noise components. KA8507B 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
20−SOP−375
ORDERING INFORMATION
Device
KA8507B
KA8507BD
Package
20−DIP−300A
20−SOP−375
Operating Temperature
−20°C
to +70°C
1
KA8507B
COMPANDER
BLOCK DIAGRAM
AGIC
5
CRC
6
Rectifier
Bypath
Variable
Resistor
DI
4
CO
3
FI
2
Filter Amp
Compressor
Output Buffer
+
1
Fo
-
Compressor
Mute
5.1K
3.3K
CPI-
7
-
Summing
Amp
11
Limiter
Logic
CB
13
Bypath
EMUTE
12
CMUTE
CPI+
8
+
BYPATH
EPI- 16
-
Variable
Resistor
Summing
Amp
EPI+ 15
+
Rectifier
Expandor
Mute
Bias Circuit
20
Vcc
17
DO
18
ERC
19
EO
9
CB
14
EB
10
GND
PIN CONFIGURATION
FO
FI
CO
DI
AGIC
CRC
CPI-
CPI+
CB
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
Vcc
EO
ERC
DO
EPI-
EPI+
EB
EMUTE
BYPATH
CMUTE
KA8507B
16
15
14
13
12
11
2
COMPANDER
KA8507B
PIN DESCRIPTION
Pin No
1
2
3
4
5
6
7
8
9
10
Symbol
FO
FI
CO
DI
AGIC
CRC
CPI
−
CPI
CB
GND
Description
Filter Amp Output
Filter Amp Input
Compressor Output
Data Input
AC Gain Infinity Capacitor
Compressor Rectifier Capacitor
Compressor Inverting Input
Compressor Non-Inverting Input
Compressor Reference Bias
Ground
Pin No
11
12
13
14
15
16
17
18
19
20
Symbol
CMUTE
BYPATH
EMUTE
EB
EPI +
EPI
−
DO
ERC
EO
V
CC
Description
Compressor Mute
No companding
Expander Mute
Expander Reference Bias
Expander Non-Inverting Input
Expander Inverting Input
Data Output
Expander Rectifier Capacitor
Expander Output
Supply Voltage
ABSOLUTE MAXIMUM RATINGS
Characteristic
Supply Voltage
Power Dissipation
KA8507B
KA8507BD
Operating Temperature
Storage Temperature
T
OPR
T
STG
Symbol
V
CC
P
D
Value
10
1000
410
−
20 to + 70
−
55 to + 150
°C
°C
Unit
V
mW
3
KA8507B
COMPANDER
ELECTRICAL CHARACTERISTICS
(V
CC
= 3V, f = 1kHz, Ta = 25°C, unless otherwise noted)
Characteristic
Symbol
Test Condition
−
No Signal
Min.
−
−
Typ.
Max.
Unit
DC ELECTRICAL CHARACTERISTICS
Operating Voltage
Operating Current
COMPRESSOR PART
Standard Input Voltage ( 0dB ) V
I (COMP)
Gain Defference
∆G
V1 (COMP)
∆G
V2 (COMP)
Bypath Gain Difference
Output Distortion
Noise Output Voltage
Mute Attenuation Ratio
Limiting Voltage
EXPANDER PART
Standard Output Level ( 0dB )
V
O (EXP)
∆G
V1 (EXP)
Gain Difference
∆G
V2 (EXP)
∆G
V3 (EXP)
Bypath Gain Difference
Output Distortion
Noise Output Voltage
Mute Attenuation Ratio
Max. Output Voltage
∆G
VB (EXP)
THD
EXP
V
NO (EXP)
ATT
MUTE
V
OEXP (MAX)
Vin = 30mVrms = 0dB
Vin =
−10dB
Vin =
−20dB
Vin =
−30dB
Vin = 0dB, BYPATH = GND
Vin = 0dB
Rg = 620ohm
Vin = 0dB, EMUTE = GND
THD = 10%
110
−0.5
−1.0
−1.5
−2.5
−
−
60
700
130
0
0
0
0
0.5
10.0
80
800
160
+0.5
+1.0
+2.0
+0.5
1.5
30.0
−
−
dB
%
µVrms
dB
mVrms
dB
mVrms
∆G
VB (COMP)
THD
COMP
V
NO (COMP)
ATT
MUTE
V
LIM (COMP)
V
CC
= 300mVrms = 0dB
Vin =
−20dB
Vin =
−40dB
Vin = 0dB, BYPATH = GND
Vin = 0dB
Rg = 620ohm
Vin = 0dB, CMUTE = GND
−
8.0
−0.5
−1.0
−1.5
−
−
60
1.15
12.5
0
0
0
0.5
3.0
80
1.35
17.0
+0.5
+1.0
+1.5
1.0
5.5
−
1.50
dB
%
mVrms
dB
Vp-p
mVrms
dB
V
CC
I
CC
2.4
4.0
7.0
6.5
V
mA
4
COMPANDER
KA8507B
TEST CIRCUIT
COMP OUT
10K
100K
1
µ
F
+
+
1
FO
Vcc
20
10uF
2
1
µ
F
+
+
3
CO
ERC
18
2.2uF
4
17
51K
5
AGIC
EPI-
16
10K
50pF
+
1.0uF
474
EPI+
15
620
100K
9.1K
+
0.47uF
474
8
620
9
12
CPI
+
EMUTE
13
SW3
+
7
CPI-
EB
14
4.7uF
EXP IN
SW2
SW1
FI
EO
19
Vcc
+
1.0uF
EXP OUT
10K
DI
KA8507
DO
22uF
+
2.2uF
+
6
CRC
KA8507B
COMP
IN
4.7uF
10
11
+
CB
BYPATH
GND
CMUTE
5