Maker : LANSDALE Semiconductor
Part No. : ML33111

Datasheet PDF : ML33111.pdf
Cross Reference : ML33111 Cross Reference
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Product Information

ML33111 www.DataSheet4U.com Low Voltage Compander Silicon Monolithic Integrated Circuit Legacy Device: Motorola MC33111 The ML33111 contains two variable gain circuits configured for compressing 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 has a full wave rectifier to provide average value information to a variable gain cell located in either the input stage or the feedback path. An internal temperature stable bandgap reference provides the necessary precision voltages. Included in the ML33111 are controls for muting each section independently, and for pass through of both. Two uncommitted op amps are available for peripheral functions. The ML33111 will operate from a supply voltage of 3.0 V to 7.0 V and , over a temperature range of TA –40° to +85°C. It is designed to accommodate a 60 dB dynamic range; from –40 dB to +20 dB referenced to 100 mVrms. Applications include cordless telephone, CBs, walkie-talkies, and most voice RF links, and any application where an improvement in the signal to noise ratio is desired. Other applications include speakerphones and voice activated intercoms, dictating machines, etc. • • • • • • • • • • Operating Supply Voltage: 3.0 V to 7.0 V Output Voltage Swing = 2.8 Vp-p with VCC = 3.0 V No Precision External Components Required 60 dB Dynamic Range Compressed to 30 dB, Re-expandable to 60 dB Unity Gain Level set at 100 mVrms Attack and Decay Times Adjustable Mute and passthrough Controls Two Uncommitted Op Amps Temperature Compensated Reference Available in Standard DIP and Surface Mount Packages 16 1 P DIP 16 = EP PLASTIC PACKAGE CASE 648 16 1 SO 16 = -5P PLASTIC PACKAGE CASE 751B (SO-16) CROSS REFERENCE/ORDERING INFORMATION PACKAGE MOTOROLA LANSDALE P DIP 16 MC33111P ML33111EP SO 16 MC33111D ML33111-5P Note: Lansdale lead free (Pb) product, as it becomes available, will be identified by a part number prefix change from ML to MLE. TRUTH TABLE Simplified Block Diagram 20 k 15 k 40 k Rectifier 10 k Vb 5 ∆ Gain Rectifier 10 9 Microphone Vb 7 7.5 k 40 k Bias & Reference Generator Mute/ Passthrough Logic 6 16 1 4 12 8 VCC ∆ Gain Vb Compressor 2 Output Expander 15 Output CM 0 1 X 0 EM 0 X 1 0 PT 0 X X 1 Function Normal Comp. Mute Expander Mute Passthrough Expander Input 0.5 14 ML33111 11 1.0 µF Compressor 3 Input 0.5 1.0 µF V+ Vb CM EM PT Page 1 of 12 www.lansdale.com Issue A ML33111 PIN FUNCTION DESCRIPTION Name Ground Compressor Output Compressor Input LANSDALE Semiconductor, Inc. www.DataSheet4U.com Pin 1 2 3 Description Connect to a clean power supply ground. Output of the compressor section. Compressor input. The input impedance is nominally 10 kΩ. Nominal signal range is 1.0 mVrms to 1.0 Vrms in normal mode, and up to 0.8 Vrms in passthrough mode. Must be capacitor coupled to the signal source. A logic high mutes the compressor. A logic low permits normal operation and passthrough. Connect an external capacitor to filter the full wave rectifier’s output. This capacitor affects attack and decay times, and low frequency accuracy. Inverting input (7) and output (6) of an op amp internally referenced to Vb. A logic high sets the gain of both expander and compressor to ≈ 0 dB, independent of input level. Inverting input (9) and output (10) of an op amp internally referenced to Vb. Connect an external capacitor to filter the full wave rectifier’s output. This capacitor affects attack and decay times, and low frequency accuracy. A logic high mutes the expander. A logic low permits normal operation and passthrough. This pin is not internally connected to anything. Expander input. The input impedance is nominally 10.9 kΩ. Nominal signal range is 10 mVrms to 316 mVrms in normal mode, and up to 1.0 Vrms in passthrough mode. Must be capacitor coupled to the signal source. Output of the expander section. Power supply. Connect to a power supp...

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