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 N – index of DIP 8 APPLICATIONS • Audio AGC Systems • Transmitter Overmodulation Protection • Tape recorders 1 D – index of SOIC 8 1 Tamb = -30ºC - +70ºС for any type of package QUICK REFERENCE DATA • Supply Voltage: 4.5V to 10V • Voltage Gain: 52dB Fig.1 ABSOLUTE MAXIMUM RATINGS • Supply Voltage: 12V • Storage Temperature: -550C to +1250C PIN CONNECTION AGC Time Const 1 8 Main Amp Output Preamp Output 2 7 Main Amp Input 3 6 OV 4 5 Preamp Input U CC Preamp Input Fig.2 1 KK6270 Preamp Output Main Amp Input UCC Preamp Input Main Amp Output Preamp Input OV AGC Time Output AGC DETECTOR Fig.3 KK6270 block diagram 2 KK6270 ELECTRICAL CHARACTERISTICS (UCC=6V, FI=1kHz, Tamb=-30ºC to +85ºC) Characteristics Conditions Value Min Supply current Input impendance Pin 5 or 6 Differential input impendance Units Typ. Max 5 10 mA 150 Ohm 300 Ohm dB Voltage gain 72mkV rms input pin 4 40 52 Output level 4mV rms input pin 4 55 90 140 mV rms THD 90mV rms input pin 4 2 5 % Equivalent noise input voltage FI=400Гц до 25kHz 1 mkV RI=300Ohm 3 KK6270 2.2u +6 V 4.7n 10u 1M 47u OUTPUT 1 8 2 7 3 6 4 5 INPUT INPUT 1kOhm min LOAD 22k 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 2 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 4 KK6270 N SUFFIX PLASTIC DIP (MS – 001BA) A Dimension, mm 5 8 B 1 4 MIN MAX A 8.51 10.16 B 6.1 7.11 5.33 C L F Symbol C D 0.36 0.56 F 1.14 1.78 -T- SEATING PLANE N G M K 0.25 (0.010) M J H D T NOTES: 1. Dimensions “A”, “B” do not include mold flash or protrusions. Maximum mold flash or protrusions 0.25 mm (0.010) per side. G 2.54 H 7.62 J 0° 10° K 2.92 3.81 L 7.62 8.26 M 0.2 0.36 N 0.38 D SUFFIX SOIC (MS - 012AA) Dimension, mm A 8 5 B H 1 G P 4 D K MIN MAX A 4.8 5 B 3.8 4 C 1.35 1.75 D 0.33 0.51 F 0.4 1.27 R x 45 C -T- Symbol SEATING PLANE J F 0.25 (0.010) M T C M M G 1.27 H 5.72 J 0° 8° K 0.1 0.25 1. Dimensions A and B do not include mold flash or protrusion. M 0.19 0.25 2. Maximum mold flash or protrusion 0.15 mm (0.006) per side for A; for B ‑ 0.25 mm (0.010) per side. P 5.8 6.2 R 0.25 0.5 NOTES: 5