COMPANDOR KA8507 automatic gain control system that used dynamic
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KA8507
COMPANDOR
KA8507 automatic gain control system that used dynamic range compression expansion. According companding signal, this reduce noise components. KA8507 includes compressor, expander, pre-amp, filter amp, limiter mute/bypath logic.
20-DIP-300A
20-SOP-375
FEATURES
Wide Supply Voltage (2.4 Easy Gain Control Mute/Bypath Logic Data In/Out
ORDERING INFORMATION
Device KA8507 Package 20-DIP-300A 20-SOP-375 Operating Temperature 20°C 70°C
BLOCK DIAGRAM
KA8507D
AGIC
Rectifier Bypath Variable Resistor
Filter
Compressor Output Buffer
Compressor Mute
5.1K 3.3K CPI7
Summing Limiter Logic Bypath EMUTE CMUTE
CPI+
BYPATH
EPI-
Variable Resistor Summing
EPI+
Rectifier Expandor Mute Bias Circuit
Fig.
KA8507
COMPANDOR
CONFIGURATION
AGIC CPICPI+
EPIEPI+ EMUTE BYPATH CMUTE
KA8507
Fig.
DESCRIPTION
Symbol AGIC Description Filter Output Filter Input Compressor Output Data Input Gain Infinity Capacitor Compressor Rectifier Capacitor Compressor Inverting Input Compressor Non-Inverting Input Compressor Reference Bias Ground Symbol CMUTE BYPATH EMUTE Description Compressor Mute companding Expander Mute Expander Reference Bias Expander Non-Inverting Input Expander Inverting Input Data Output Expander Rectifier Capacitor Expander Output Supply Voltage
KA8507
COMPANDOR
ABSOLUTE MAXIMUM RATINGS
Characteristic Supply Voltage Power Dissipation Operating Temperature Storage Temperature KA8507 KA8507D Symbol Value 1000 Unit
ELECTRICAL CHARACTERISTICS
(VCC 1KHz, 25°C, unless otherwise noted) Characteristic Symbol Test Condition Unit
ELECTRICAL CHARACTERISTICS Operating Voltage Operating Current COMPRESSOR PART Standard Input Voltage (0dB) Gain Difference Bypath Gain Difference Output Distortion Noise Output Voltage Mute Attenuation Ratio Limiting Voltage EXPANDER PART Standard Output Level (0dB) Gain Difference Bypath Gain Difference Output Distortion Noise Output Voltage Mute Attenuation Ratio Max. Output Voltage (EXP) (EXP) (EXP) (EXP) (EXP) (EXP) MUTE VOEXP (MAX) 30mVrms -10dB-0.5 -20dB -30dB 0dB, BYPATH 620ohm 0dB, EMUTE -0.5 -1.0 -1.5 -2.5 10.0 +0.5 +1.0 +2.0 +0.5 30.0 µVrms mVrms mVrms (COMP) (COMP) (COMP) (COMP) COMP (COMP) MUTE VLIM (COMP) 300mVrms -20dB -40dB 0dB, BYPATH 620ohm 0dB, CMUTE -0.5 -1.0 -1.5 1.15 12.5 1.35 17.0 +0.5 +1.0 +1.5 1.50 mVrms Vp-p mVrms Signal
KA8507
COMPANDOR
TEST CIRCUIT
COMP 100K
10uF 2.2uF AGIC EPI16 EPI+ 100K 9.1K 0.47uF CPI+ EMUTE CPIEB 4.7uF 50pF 1.0uF
1.0uF
KA8507
22uF 2.2uF
COMP
4.7uF
BYPATH
CMUTE
Fig.
COMPANDOR
Speaker 390K 2.2µF 47µF
0.47µF
Data output
Expander input 10µF
Expander Mute
Compressor Mute
LOGIC
Filter
Comp
3.3K
APPLICATION CIRCUIT
2.2K
KA8507
(HAND SET)
Modulation 5.6K 120K
22µF
22µF
8.2K
Fig.
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