三合微科股份有限公司 SM7186 DESCRIPTIONS: FEATURE: SM7186 is an Audio Echo Processor using CMOS Technology. It has built-in AD/DA and 48KBits SRAM for time delay. External Resister adjust large range oscillation frequency and control delay time. Many combination to fit your applications. * Built-in adjustable OSC. * Built-in power on reset circuit. * Built-in 48KBits SRAM for delay control. * Adjustable delay time setting: 30ms ~ 700ms * Low operating current. APPLICATIONS: * * * * * * VCD Karaoke TV Audio System Car Stereo VCR VDD VREF AGND DGND OSCO OSCR DACTL ADCTL 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 OP1-IN OP1-OUT OP2-OUT OP2-IN DAC-OUT DAC-IN ADC-IN ADC-OUT MAR. 2000 Page 1 三合微科股份有限公司 PIN DESCRIPTION PIN No. PIN NAME I/O FUNCTION 1 VDD Power Positive power supply 2 VREF AI/O Analog reference voltage 3 AGND Power Analog negative power supply 4 DGND Power Digital negative power supply 5 OSCO OSC System clock output 6 OSCR OSC Add resistor to modify internal OSC 7 DACTL AIN DAC control 8 ADCTL AIN ADC control 9 ADC-OUT AOUT ADC OP output 10 ADC-IN AIN ADC OP input 11 DAC-IN AIN DAC OP input 12 DAC-OUT AOUT DAC OP output 13 OP2-IN AIN OP2 input 14 OP2-OUT AOUT OP2 output 15 OP1-OUT AOUT OP1 output 16 OP1-IN AIN OP1 input Page 2 三合微科股份有限公司 BLOCK DIAGRAM D A C T L OP1-IN Low Pass Filter OP2-IN D A C D A C A D C A D C I N O U T O U T I N A D C T L AD Converter Mix SRAM OP1-OUT Low Pass Filter OP2-OUT OSCO OSC OSCR VDD Verf DA Converter POR Digital Control VREF Page 3 AGND DGND 三合微科股份有限公司 Echo Mode & Surround Mode Audio out Low Pass Filter Audio In AD Converter Add SRAM Low Pass Filter DA Converter Echo Mode Audio In Low Pass Filter AD Converter SRAM Audio Out Low Pass Filter DA Converter Surround Mode Page 4 三合微科股份有限公司 DELAY TIME TABLE OSCR Fosc (MHz) Delay Time ms 160K : 1.047 737.28 75K : 1.989 368.64 33K : 3.935 184.32 24K : 4.893 160.00 18K : 5.974 122.88 11K : 7.977 92.16 6.8K : 9.99 73.73 4.7K : 11.84 61.44 3.3K : 13.72 52.66 2.4K : 15.94 46.08 1.8K : 18.18 40.96 1.5K : 19.68 36.86 1.1K : 22.05 33.51 820 : 23.87 30.72 Page 5 三合微科股份有限公司 AC CHARACTERISTICS o ( Vcc = 5.0V, f in = 1KHz, Vi = 100mVrms, fck = 4.608MHz, Ta = 25 C, unless otherwise noted ) SYMBOL PARAMETER Icco Supply current Gv Voltage gain RL = 47K : Vomax Maximum output voltage THD = 10% THD Output distortion No Output noise voltage PSRR Power supply rejection ratio Tmute Mute time Test condition Min 0.8 Typ Max Unit 10 20 mA -0.5 2.5 dB 1.4 0.38 0.9 Vcc = -20dBV f = 100Hz Parameter -70 dBV -40 -25 560 600 Vcc Supply voltage Icc Supply current V IH "H" input voltage V IL "L" input voltage Limits Min Typ Max 4.5 5.5 V 10 20 mA V 0.3V Page 6 Unit 5 0.7V % -85 DC CHARACTERISTICS Symbol Vrms V dB 640 msec 三合微科股份有限公司 ABSOLUTE MAXIMUM RATINGS o ( Ta = 25 C, unless otherwise noted ) Symbol Decription Limits Unit Vcc Supply voltage 6.5 V Icc Supply current 100 mA Pd Power dissipation 1.7 W Topr Operation temperature -20 ~ 75 o C Tstg Storage temperature -25 ~ 125 o C Page 7 三合微科股份有限公司 MIC PRE-AMP CIRCUIT MIC 1 C 0.02 P F +12V 1PF 1K 20K 560 15K 47K 5 6 22 P F + 7 10 P F 4.7K 47K OUTPUT 1K MIC 2 C 0.02 P F 15K 100pFs ~ 820pF 47K 1K 20K 560 1P F +12V 22 P F 2 + - 1 4 47K 100pFs ~ 820pF 4.7K 4.7K 3 100 P F Page 8 4.7K 10 P F 三合微科股份有限公司 ECHO MODE APPLICATION CIRCUIT(MODIFIED) 3900pF 4.7 µ F 15K INPUT 100K 4.7 µ F 10K +5V 1 16 100µF 0.1µ F 560pF 47 µ F 2 10K 15 4.7K 10 µ F 5.6K 3 5 SM7186 4 14 50K 0.01 µF R 6 OUTPUT 13 15K 12 560pF OSCR 10 µ F 10K 11 3300pF 10K 0.082 µ F 7 10 0.1 µ F 10K 0.082 µF 8 9 0.1 µ F 1. Pin 6 R is approximate 1K~160k Ω . 2. Represent Analog Ground. 3. Represent Digital Ground. V.1.0, 2000 Page 9 NOV. 2000 三合微科股份有限公司 SURROUND MODE APPLICATION CIRCUIT INPUT OUTPUT 100K 2.7K 4.7P F 5600pF 10 PF 15K 15K 5600pF 10K 15K 0.1 P F 15K 10K 0.1 PF 560pF 16 560pF 15 14 13 12 11 10 19 16 17 18 SM7186 11 12 13 14 15 NC 100 P F 0.1 P F R *10K 0.1P F 47 P F 0.1 P F 20K +5V Page 10 0.1 P F