MC33111D

The MC33111D is a type of low voltage compander,which includes two variable gain circuits configured for compre ssing and expanding the dynamic range of an audio signal. One circuit is configured as an expander, and the other is configured as a compressor. Each circuit of MC33111D has a full wave rectifier to offer average value information to a variable gain cell located in either the input stage or the feedback path. An internal temperature stable bandgap reference offers the necessary precision voltages.

Features of the MC33111D are:(1)operating supply voltage: 3.0 V to 7.0 V;(2)output voltage swing = 2.8 up-p with VCC = 3.0 V;(3)no precision external components required;(4)60 dB dynamic range compressed to 30 dB, re-expa ndable to 60 dB;(5)unity gain level set at 100 mVrms;(6)attack and decay times adjustable;(7) mute and passthroug h controls;(8)available in standard DIP and surface mount packages.

The absolute maximum ratings and electrical characteristics(VCC = 3.6 V, f = 1.0 kHz, TA = + 25°C)of the MC33111D can be summarized as:(1):VCC supply voltage (Pin 16 Pin 1) is0.5Vdc to +12 Vdc;(2):high input voltage (Pins 3, 4, 8, 12, 14) is VCC + 0.5 Vdc;(3):low input voltage (Pins 3, 4, 8, 12, 14) is0.5 Vdc;(4):output source current (Pins 2, 6, 10, 15) is self-limiting; (5):output sink current (Pins 2, 6, 10, 15) is self-limiting ;(6):storage temperature ranges from65°C to +150 °C.Electrical characteristics:(1):0 dB gain (Vin = 100 mVrms) is1.5dB min, 0dB typ and 1.5 dB max;(2):passthrough Gain (Pin 8 = High, Pin 4 = Low, Vin = 1.0 Vrms) IS2.0dB min, 0 dB typ and 1.0 dB max;(3):tot al harmonic distoration (Vin = 100 mVrms)is 0.2% typ and 1.0 % max;(4):input impedance at Pin 3 is 8.0k min, 10k typ and 14k max;(5):peak output current (3.0 VCC 7.0 V, normal or passthrough modes,Vin = Max) is ±4.0m A.etc