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| ICs for Audio Common Use AN7384N Electronic Volume IC for Cassette Deck s Overview 1 16 15 14 13 12 11 10 9 0.51min 6.30.25 3.80.25 (3.45) 2.54 0.3 - 0.0 + 0.1 5 s Features * High input dynamic range * Low output noise voltage * Capable of selecting two kinds of control mode (1) L, R, independent volume (2) Coalition volume + L, R balance * Reference voltage source for control voltage built-in 2 3 21.70.3 4 5 6 7 8 3 ~ 15 7.620.25 16-Lead DIP Package (DIP016-P-0300E) s Block Diagram VEE (SUB) 16 15 GND3 14 13 GND2 12 11 10 NC 9 VREF VCA Mode SW. VCA Control VCA Buf. Buf. 1 VCC 2 3 GND1 4 5 6 7 8 0.50.1 1.20.25 The AN7384N is a volume control IC for recording level adjustment of cassette deck and mini component stereo. Unit : mm AN7384N s Absolute Maximum Ratings (Ta= 25C) Parameter Supply Voltage Supply Current Power Dissipation Operating Ambient Temperature Storage Temperature Symbol VCC ICC PD Topr Tstg ICs for Audio Common Use Rating 12 30 800 -20 ~ + 70 -55 ~ +150 Unit V mA mW C C s Recommended Operating Range (Ta = 25C) Parameter Operating Supply Voltage Range Symbol VCC Range 7V ~ 11V s Electrical Characteristics (VCC = 10V, Ta = 25C) Parameter Positive Side Circuit Current Negative Side Circuit Current Attenuation - 1 Attenuation - 2 Channel Balance - 1 Distortion Rate - 1 Distortion Rate - 2 Noise Output Voltage - 1 Noise Output Voltage - 2 Channel Balance - 2 Max. Input Voltage Max. Output Voltage Control Voltage Range Volume Mode Switching Voltage Balance Mode Switching Voltage Balance Mode Control Gain (Lch.) Balance Mode Channel Balance *1 *2 Symbol ICC IEE Condition Vin= 0dBV, Volume mode, Vcont= Vref Vin= 0dBV, Volume mode, Vcont= Vref -20 -1 -2 min. typ. 12 -9.1 0 -85 0 0.05 0.15 -106 -3 14.8 1.5 0 0 3.5 Volume mode, Input -20dBV Vcont to Pin5, V7= 0.5Vref Volume mode, Input -20dBV Vcont to Pin5, V7 = 0.5Vref, L/R -22 -3 -20 0 Vref 1.5 4.8 -18 3 0 16 1 -80 2 0.1 0 -100 -110 3 max. 20 Unit mA mA dBV dBV dB % % dBV dBV dB dBV dBV V V V dBV dB ATT - 1 *1 Vin= 0dBV, Volume mode, Vcont= Vref ATT - 2 *1 Vin= 0dBV, Volume mode, Vcont= 0V CB - 1 *1 Vin= 0dBV, Volume mode, Vcont= Vref *1 THD - 1 *2 Vin= -20dBV, Volume mode, Vcont= Vref *1 THD - 2 *2 Vin= 0dBV, Volume mode, at Vcont= -20dB Vno - 1 *1 Without input (Rg= 0), Volume mode, Vcont= Vref, A curve Vno - 2 *1 Without input (Rg= 0), Volume mode, Vcont= 0V, A curve CB - 2 *1 Vi (max.)*1 VO (max.)*1 Vcont *1 V10 (V) V10 (B) ATTBG CB - 3 Vin= 0dBV, Volume mode, at ATT= -20dB THD= 3%, ATT= -20dB THD= 3%, Vcont= Vref 2-channel Filter of 18dB/oct should be used at measurement. s Characteristics Curve Independent Volume Mode Attenuation Characteristics 0 VREF Vcont.1 - 20 SLO - 40 Balance Mode Attenuation Characteristics 0 - 10 - 20 - 30 VOut= - 20dBV VOut= 0dBV Attenuation (dB) Attenuation (dB) - 40 - 50 - 60 - 70 VIN= 0dBV f= 1kHz VOut= - 40dBV - 60 Vin = 0dB 1kHz - 80 (Without Enter) 0 1 2 3 Vcont (V) 4 5 - 80 - 90 0 1 2 3 4 5 Pinu V (V) ICs for Audio Common Use s Application Circuit + AN7384N 24k 24k 47F -10 (V) 47F VINB B.P. 16 15 - VoutB B.P. 47F VREF 11 Bal mode Vol. mode 10 Mode SW. 9 N.C. 14 13 12 VEE (SUB) GND3 VCA GND2 VREF VCA Control VCC VCA Buf. GND1 3 Buf. 1 +10 2 + 4 B.P. 47F 5 6 7 8 (V) 47F - 24 47F k B.P. VINA 24k 10kB B typ. 10kB B typ. VoutA 1. Voltage of Pin 7 becomes center at 1/2 VREF in case of using at balance mode. 2. Coupling capacitor of output can be excluded according to system specifications. s Pin Descriptions Pin No. 1 Pin Name Positive Side Power Supply Description Positive side supply voltage pin Impedance Equivalent Circuit 20A 2 * 15 Input Pin Each channel input pin Pin2 - ch. A Pin15 - ch. B 2 15 3 A-ch. GND A-ch. side VCA system GND pin 4 * 13 Output Pin Each channel output pin Pin4 - A-ch. Pin13 - B-ch. 1.8k 4 13 1.8k 5 A-ch. Control Voltage Input Control DC input pin * Pin11Low - A-ch. side independent control * Pin11Low - A, B-ch. balance control Control DC input pin * Pin11High - B-ch. side independent control * Pin11High - A, B-ch. balance control 5 30A 7 B-ch. Control Voltage Input AN7384N s Pin Descriptions (Cont.) Pin No. 6 Pin Name A-ch. Control Voltage Output Description Control DC voltage buffer output pin ICs for Audio Common Use Impedance Equivalent Circuit 6 8 B-ch. Control Voltage Output Control voltage buffer output input to Pin7 8 9 NC 10 Volume Mode/Balance Mode Switching Control mode switching pin Low - independent volume control High - coalition volume balance control mode Vref 2 10 11 Reference Voltage Output Reference voltage output pin 11 12 14 16 GND B-ch. GND Control system GND pin B-ch. side VCA system GND pin Negative Side Power Supply Negative side supply pin Supplementary Explanation Electrical Caracteristics Design Reference Value Parameter Crosstalk Control Voltage at -20dB Attenuation Characteristics Attenuation Characteristics Balance The ratio of Vcont.1 to Vref Control Power Supply Symbol CT Vcont1 SLO ATT-B ATT-V Vref Condition Vin = 0dBV, Vcont = Vref Vin = 0dBV, Vout = -20dBV Vin = 0dBV, Vcont.1 Vcont.- 0.5V Vin = 0dBV, Vcont. = Vcont.1 Vcont.- 0.5V 1.8 - 15.5 - 1.4 0.25 4.8 min. typ. - 85 2 - 12 0 0.4 5 max. - 80 2.2 - 9.5 1.4 0.55 5.2 Unit dBV V dB dB dB V Operation Mode and Control Pin Pin No. 5 7 Volume Mode Volume Control Volume Control Balance Mode Volume Control Balance Control Mode Volume Mode Balance Mode Operation Description Control each channel independently Control volume at Pin5 simultaneously. Control right and left balance at Pin6 Note) Center at 1/2Vref Precautions on Use This IC is an integrated circuit for +, -2 power supply. When user use this IC at - power supply, making reference voltage outside with OP amp. is needed. As this IC is apt to be influenced by supply impedance, it needs capacitors of more than 47F between VCC and GND, more than 47F between VEE and GND. |
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