TAA970

II II TAA970 MICROPHONE AMPLIFIER The TAA970 is a monolithic integrated microphone amplifier for use in telephone systems. It is compatible with both piezo-electric and dynamic microphones of suitable impedance and sensitivity, Special features are: - almost constant voltage gain and d. c. voltage drop with supply current variations of 10 to 100 rnA. I - output voltage before limiting: 1 V (r. m. s. value) - operation is independent of supply voltage polarity - gain can be set to either of two values - only one external capacitor required - output impedance determined by internal feed back Supply current QUICK REFERENCE DATA I2Supply voltage drop at ± = 50 rnA Voltage gain pin 9 not connected pin 9 connected to pin 10 Output impedance pin 9 not connected pin 9 connected to pin 10 ± 12 ±V2-4 Gv Gv Ro Ro 10 to 100 rnA typo 4,8 V typo 150 typo 210 typo 60 Q typo 100 Q PACKAGE OUTLINE TO-74 (reduced height) Dimensions in mm ---- I=--O,86max -j 9,4max --- November 1974 I...