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| TECHNICAL DATA GAIN CONTROLLED MICROPHONE FIER/VOGAD PREAMPLI- The KK6270 is a silicon integrated circuit combining the functions of audio amplifier and voice operated gain adjusting device (VOGAD). It is designed to accept signals from a low sensitivity microphone and to provide an essentially constant output signal for a 50dB range of input. The dynamic range, attack and decay times are controlled by external components. FEATURES * Constant Output Signal * Fast Attack * Low Power Consumption * Simple Circuitry APPLICATIONS * Audio AGC Systems * Transmitter Overmodulation Protection * Tape recorders QUICK REFERENCE DATA * Supply Voltage: 4.5V to 10V * Voltage Gain: 52dB ABSOLUTE MAXIMUM RATINGS * Supply Voltage: 12V * Storage Temperature: -550C to +1250C 8 1 8 N - index of DIP D - index of SOIC 1 Tamb = -30C - +70 for any type of package Fig.1 PIN CONNECTION AGC T ime Const Preamp Output U CC Preamp Input 1 2 3 4 8 7 6 5 Main Amp Output Main Amp Input OV Preamp Input Fig.2 1 KK6270 Preamp Output Main Amp Input UCC Preamp Input Preamp Input Main Amp Output OV AGC Time Output AGC DETECTOR Fig.3 KK6270 block diagram 2 KK6270 ELECTRICAL CHARACTERISTICS (UCC=6V, FI=1kHz, Tamb=-30C to +85C) Characteristics Supply current Conditions Min Value Typ. 5 Max 10 Units mA Input impendance Pin 5 or 6 150 Ohm Differential input impendance 300 Ohm Voltage gain 72mkV rms input pin 4 4mV rms input pin 4 90mV rms input pin 4 40 52 dB Output level 55 90 140 mV rms THD 2 5 % Equivalent noise input voltage FI=400 25kHz RI=300Ohm 1 mkV 3 KK6270 +6 V 2.2u 4.7n 10u 1 2 3 4 8 7 6 5 INPUT 22k OUTPUT 1kOhm min LOAD 1M 47u INPUT 100n N. B. If input not AC coupled the resistance between pins 4 and 5 must be less than 10 Ohms Fig.4 KK6270 test and application circuit EXTERNAL 4.7n 10k EXTERNAL 680 2.2u 8 7 10 kOm Voltage gain = 680 Om Upper frequency response 10kOm/4.7nF = 3kHz Lower frequency response 680 Om/2.2uF = 300Hz Fig.5 KK6270 frequency response 2 4 KK6270 N SUFFIX PLASTIC DIP (MS - 001BA) A 8 5 B 1 4 Dimension, mm Symbol A B MIN 8.51 6.1 MAX 10.16 7.11 5.33 0.36 1.14 2.54 7.62 0 2.92 7.62 0.2 0.38 10 3.81 8.26 0.36 0.56 1.78 F L C D C -T- SEATING N G D 0.25 (0.010) M T K PLANE F G M H J H J K L M N NOTES: 1. Dimensions "A", "B" do not include mold flash or protrusions. Maximum mold flash or protrusions 0.25 mm (0.010) per side. D SUFFIX SOIC (MS - 012AA) Dimension, mm 5 A 8 Symbol A B P MIN 4.8 3.8 1.35 0.33 0.4 1.27 5.72 0 0.1 0.19 5.8 0.25 MAX 5 4 1.75 0.51 1.27 H B C 1 G 4 C R x 45 D F -TD 0.25 (0.010) M T C M K SEATING PLANE G J F M H J K M P R 8 0.25 0.25 6.2 0.5 NOTES: 1. Dimensions A and B do not include mold flash or protrusion. 2. Maximum mold flash or protrusion 0.15 mm (0.006) per side for A; for B 0.25 mm (0.010) per side. 5 |
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