TK10651 TOKO, Inc, TK10651 Datasheet
TK10651
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TK10651 Summary of contents
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... Wide Operating Voltage Range Low Standby Current Microphone Amplifier IDC Circuit (Instantaneous Deviation Control) DESCRIPTION TK10651 is a noise reduction IC developed mainly for cordless phones also used for voice and data communications. It has a built-in compressor circuit to increase the average modulation level and an expander circuit to reduce the noise level ...
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... TK10651 ABSOLUTE MAXIMUM RATINGS Supply Voltage ......................................................... 10 V Power Dissipation (Note 1) ................................ 410 mW Junction Temperature .......................................... 150 C Operating Voltage Range .............................. 2.4 to 7.0 V TK10651 ELECTRICAL CHARACTERISTICS Test conditions 3 1.0 kHz ...
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... TK10651 ELECTRICAL CHARACTERISTICS (CONT.) Test conditions 3 1.0 kHz ...
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... TK10651 1.0 µF FILTER OUT 10 k 1.0 µ FILTER IN 6800 pF 620 100 k COMPRESS OUT 10 k DATA IN 620 0.47 µF COMPRESS IN 620 4.7 µF SWITCH PIN HIGH (OPEN OR V Pin 11 Comp Mute OFF Pin 12 Compandor Pin 13 Exp Mute OFF Page 4 TEST CIRCUIT 18000 1000 pF 1.0 µ ...
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... SUPPLY VOLTAGE (V) January 2000 TOKO, Inc 3.0 V 100 1.0 kHz 100 mV(rms TK10651 SUPPLY CURRENT vs. SUPPLY VOLTAGE NO SIGNAL (V) SUPPLY CURRENT vs. AMBIENT TEMPERATURE 3 SIGNAL 5 4 ...
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... TK10651 TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) EXPANDER AC CHARACTERISTICS (CONT.) OUTPUT REFERENCE VOLTAGE vs. AMBIENT TEMPERATURE -40 - COMPRESSOR AC CHARACTERISTICS INPUT REFERENCE VOLTAGE vs. SUPPLY VOLTAGE (V) INPUT REFERENCE VOLTAGE vs. AMBIENT TEMPERATURE 3 1.0 kHz ...
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... IDC circuit limit the maximum frequency devia- tion to 4.5 kHz. TEST CONFIGURATION FM TK10651 SG COMP January 2000 TOKO, Inc 100 3.0 kHz frequency TK10651 TK10487 EXP V TK10651 OUTPUT VOLTAGE VS. THIRD ORDER LPF INPUT VOLTAGE 3 1.0 kHz -10 -20 -30 -40 -50 -60 -70 -90 -80 -70 -60 -50 -40 -30 -20 - (dBV) MODULATION LEVEL vs ...
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... TK10651 TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) USING THE COMPANDOR TO IMPROVE S/N (CONT.) The improvement resulting from the expander is expressed by measuring the overall characteristics of the FM IF System (TK10487M). The signal generator was switched to internal modulation and the output is defined when the RF input = the graph below indicates, ...
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... The input can accommodate a variety of microphones by adjusting the gain to match the microphone's output volt- age. The user should set the gain and input level so that the output level at pin 3 is normally 300 mV (standard level). TK10651 100 k COMP ...
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... TK10651 APPLICATION INFORMATION (CONT.) RECTIFIER The rectifier's smoothing capacitor pins (6 & 18), determine the smoothing characteristics and the time constants of the compressor and the expander. The time constant is deter- mined by the external capacitor value and the internal 10 k resistance. RECTIFIER GAIN CELL ...
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... The compressor's and expander's mute pins and the through pin (noise reduction is off) are pulled up by internal current sources, therefore they do not need an external pull up. EXP OUT Concerning the switching logic, refer to the table in the Test Circuit section DATA 17 OUT + - TK10651 11,12,13 Page 11 ...
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... Mill Plain Road Danbury, CT 06811 Tel: (203) 748-6871 Fax: (203) 797-1223 IC-231-TK11031 0798O0.0K Marking Information Marking TK10651 Fax: (847) 699-7864 Semiconductor Technical Support Toko Design Center 4755 Forge Road Colorado Springs, CO 80907 Tel: (719) 528-2200 Fax: (719) 528-2375 January 2000 TOKO, Inc. ...