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 20−SOP−375 • Wide Supply Voltage ( 2.4 to 7V ) • Easy Gain Control • Mute/Bypath Logic • Data In/Out Pin ORDERING INFORMATION Device Package KA8507B 20−DIP−300A KA8507BD 20−SOP−375 Operating Temperature −20°C to +70°C 1 KA8507B COMPANDER BLOCK DIAGRAM AGIC CRC DI CO FI 5 6 4 3 2 Filter Amp Rectifier Compressor Output Buffer Bypath + Variable Resistor 1 Fo 11 CMUTE 12 BYPATH 13 EMUTE 20 Vcc Compressor Mute 5.1K 3.3K CPI- 7 Summing Amp CPI+ 8 Limiter + Logic CB Bypath EPI- 16 EPI+ 15 Variable Resistor Summing Amp Rectifier Expandor Mute + Bias Circuit 17 18 19 9 14 10 DO ERC EO CB EB GND PIN CONFIGURATION 2 FO 1 20 Vcc FI 2 19 EO CO 3 18 ERC DI 4 17 DO AGIC 5 16 EPI- CRC 6 15 EPI+ CPI- 7 14 EB CPI+ 8 13 EMUTE CB 9 12 BYPATH GND 10 11 CMUTE KA8507B COMPANDER KA8507B PIN DESCRIPTION Pin No Symbol 1 FO 2 FI 3 Description Pin No Symbol Description Filter Amp Output 11 CMUTE Compressor Mute Filter Amp Input 12 BYPATH No companding CO Compressor Output 13 EMUTE Expander Mute 4 DI Data Input 14 EB 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 8 CPI Compressor Non-Inverting Input 18 ERC 9 CB Compressor Reference Bias 19 EO Expander Output 10 GND Ground 20 VCC Supply Voltage Expander Reference Bias Data Output Expander Rectifier Capacitor ABSOLUTE MAXIMUM RATINGS Characteristic Supply Voltage Power Dissipation KA8507B Symbol Value Unit VCC 10 V PD 1000 mW KA8507BD 410 Operating Temperature TOPR − 20 to + 70 °C Storage Temperature TSTG − 55 to + 150 °C 3 KA8507B COMPANDER ELECTRICAL CHARACTERISTICS (VCC = 3V, f = 1kHz, Ta = 25°C, unless otherwise noted) Characteristic Symbol Test Condition Min. Typ. Max. Unit − − 2.4 7.0 V − 4.0 6.5 mA VCC = 300mVrms = 0dB 8.0 12.5 17.0 mVrms ∆GV1 (COMP) Vin = −20dB −0.5 0 +0.5 dB ∆GV2 (COMP) Vin = −40dB −1.0 0 +1.0 Bypath Gain Difference ∆GVB (COMP) Vin = 0dB, BYPATH = GND −1.5 0 +1.5 dB Output Distortion THD COMP Vin = 0dB − 0.5 1.0 % Noise Output Voltage VNO (COMP) Rg = 620ohm − 3.0 5.5 mVrms Mute Attenuation Ratio ATT MUTE Vin = 0dB, CMUTE = GND 60 80 − dB Limiting Voltage VLIM (COMP) 1.15 1.35 1.50 Vp-p mVrms DC ELECTRICAL CHARACTERISTICS Operating Voltage VCC Operating Current ICC No Signal COMPRESSOR PART Standard Input Voltage ( 0dB ) VI (COMP) Gain Defference − EXPANDER PART Standard Output Level ( 0dB ) VO (EXP) Vin = 30mVrms = 0dB 110 130 160 ∆GV1 (EXP) Vin = −10dB −0.5 0 +0.5 ∆GV2 (EXP) Vin = −20dB −1.0 0 +1.0 ∆GV3 (EXP) Vin = −30dB −1.5 0 +2.0 Bypath Gain Difference ∆GVB (EXP) Vin = 0dB, BYPATH = GND −2.5 0 +0.5 dB Output Distortion THD EXP Vin = 0dB − 0.5 1.5 % Noise Output Voltage VNO (EXP) Rg = 620ohm − 10.0 30.0 µVrms Mute Attenuation Ratio ATT MUTE Vin = 0dB, EMUTE = GND 60 80 − dB Max. Output Voltage VOEXP (MAX) THD = 10% 700 800 − mVrms Gain Difference 4 dB COMPANDER KA8507B TEST CIRCUIT 1 µF 1 + Vcc FO 20 + COMP OUT Vcc 10uF 10K 100K 2 FI EO 19 EXP OUT + 1.0uF 10K 1µ F + CO ERC 18 + 3 2.2uF 4 DI DO KA8507 17 50pF 51K + 5 AGIC 16 10K KA8507B 2.2uF + EPI- + 22uF 6 CRC 1.0uF 474 EPI+ 15 620 EXP IN 100K 7 CPI- EB 14 + 9.1K + 4.7uF 0.47uF 474 8 CPI+ EMUTE 13 BYPATH 12 CMUTE 11 SW3 620 + COMP IN 9 CB SW2 4.7uF 10 GND SW1 5 Vcc + 47µF Speaker 33K TO TX Modulation 104 20 1 + 101 Filter Amp 5.6K 132 19 2 473 390K Exp 120K 18 3 + - + 4 17 2.2 µF 39K Data output 473 10K + 22µF 0.47 µF 16 5 + Comp + - 33K 33K 473 15 6 47K 7 + 8 13 10µF 1µ F 8.2K + 3.3K REG 14 Expander input 104 - + 51K + 22µF 9 2.2K REG LOGIC 12 Expander Mute 223 103 11 10 MIC Compressor Mute 6 COMPANDER KA8507B APPLICATION CIRCUIT (HAND SET) This datasheet has been download from: www.datasheetcatalog.com Datasheets for electronics components.