electric mitsubishi M65855FP preliminary notice ; this is not a final specification. some parametric limits are subject to change. mitsubishi sound processor ic's ( / 10 ) karaoke 50 series series supply voltage range?cc=3.5~5.5v rated supply voltage?cc=5v 1 chip digital echo with microphone mixing amplifier recommended operating conditions system configuration description ?internal input/output low pass filter,a/d,d/a converters,microphone mixing amplifier,memory achieve a digital echo system with a single chip. ?high performance digital echo circuit thanks to 20kbit memory ?thanks to the improvement a/d,d/a converters,decrease the external output ?internal echo mute circuit and echo volume achieve a mixing level control ?built-in current control oscillation circuit for generating clocks ?delay time =164msec (min.15ms to max. 200 ms can be set) ?small 16-pin flat package (16p2n) ?built-in automatic reset circuit with power turned on ?5v single power supply features package outline the M65855FP is a cmos ic built-in digital echo function with microphone mixing circuits for karaoke equipment packed in a single chip. it is suitable for karaoke equipments such as video cd player,mini stereo,cd radio cassette,tv or vcr. 1 outline 16p2n hpf mix bass bass mix mix mic vol mic vol mix echo l r mic1 mic2 mic amp mic amp l r hpf lpf key control ram mix vocal cut M65855FP echo vol mix
electric mitsubishi M65855FP preliminary notice ; this is not a final specification. some parametric limits are subject to change. mitsubishi sound processor ic's ( / 10 ) karaoke 50 series series pin configuration 1 2 3 4 5 6 7 10 11 12 13 14 15 16 ref gnd v cc lpf1 in lpf1 out clock lpf2 out lpf2 in op2 out op2 in op1 in op1 out m 6 5 8 5 5 f p 2 mic out 8 9 mic in echovol echomute
electric mitsubishi M65855FP preliminary notice ; this is not a final specification. some parametric limits are subject to change. mitsubishi sound processor ic's ( / 10 ) karaoke 50 series series ic internal block diagram 1/2 vcc 10 11 12 13 7 6 5 4 3 16 main control auto reset gnd 20kbit sram vcc ref clock oscillator clock reset mo m i lpf1 d1 do0 do1 a/d lpf2 d/a 3 8 9 mix mic out mic in 15 echomute 2 echovol vol 1 14
electric mitsubishi M65855FP preliminary notice ; this is not a final specification. some parametric limits are subject to change. mitsubishi sound processor ic's ( / 10 ) karaoke 50 series series pin description pin no. symbol name i/o function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ref gnd reference gnd - to connect 1/2 vcc output and filter capacitor op1 out opeamp 1 output o uses external c to form an d/a conversion integrator op2 in opeamp 2 input i op2 out opeamp 2 output o lpf1 out lpf1 in low pass filter 1 output low pass filter 1 input o i lpf2 in lpf2 out low pass filter 2 input low pass filter 2 output o i uses external cr to form a low pass filter at the input side - i 4 15 16 echovol echo volume control i echo level control with external dc voltage (from 0 to -10,- 8 steps) mic out microphone mixing output o mixing output echo output and microphone mic in microphone input i microphone input v cc power supply applies a voltage of 3.5v to 5.5v(rated5v) clock op1 in opeamp 1 input i i - clock control controls a built-in clock generation circuit with external r echomute echo mute control i echo mute control and clock stop control with external dc voltage uses external cr to form a low pass filter at the input side uses external c to form an a/d conversion integrator
electric mitsubishi M65855FP preliminary notice ; this is not a final specification. some parametric limits are subject to change. mitsubishi sound processor ic's ( / 10 ) karaoke 50 series series absolute maximum ratings recommended operating conditions vcc supply voltage v icc pd topr tstg power dissipation operating temperature storage temperature circuit current ma w ? ? 6.0 100 0.8 -20~75 -40~125 (ta=25?,unless otherwise noted) symbol parameter ratings unit test conditions vcc supply voltage 5 v 3.5 5.5 limits min. typ. max. symbol parameter unit test conditions 5 vil "l" input voltage v 0.0 1.0 vir v vih v vcc-1 vcc "ref" input voltage "h"input voltage 1/2 vcc 1/2vcc-0.5 1/2vcc+0.5
electric mitsubishi M65855FP preliminary notice ; this is not a final specification. some parametric limits are subject to change. mitsubishi sound processor ic's ( / 10 ) karaoke 50 series series electrical characteristics icc gv vomax thd no circuit current voltage gain between input and output maximum output voltage output distortion output noise voltage when signal is not provided rl=47k w thd=10% 30khz lpf jis-a 25 -3.5 1.2 1.2 -80 ma db v (rms) % dbv parameter symbol test conditions limits min. typ. max. unit (vcc=5v,f=1khz,vi=100mv (rms) ,fck=1mhz,ta=25?,unless otherwise noted) 0.9 3.0 -60 50 -6.5 -0.5 10 fck clock frequency 1 mhz rc=120k w 6 td delay time rc=120k w ms 164 gv vomax thd no rl=47k w thd=10% 30khz lpf jis-a,echo=mute 0 1.7 0.05 -90 db v (rms) % dbv 1.1 0.10 -80 -3.0 3.0 total echo mic voltage gain between input and output maximum output voltage output distortion output noise voltage
electric mitsubishi M65855FP preliminary notice ; this is not a final specification. some parametric limits are subject to change. mitsubishi sound processor ic's ( / 10 ) karaoke 50 series series function description 16 the M65855FP incorporates a current control type clock oscillator circuit in it, thus providing circuit configuration just by connecting a resistor for current control to pin 16 clock. fully internal clock supply prevents occurrence of undesired radiation without affecting any external circuit when rc=120k w fck=1mhz rc clock frequency fck clock oscillator circuit (1) clock oscillator circuit 7 (2) delay time td the delay time can be calculated by the equation; td=n/fs (n=the number of memory bits=20480) when fck=1mhz,td can be set at 164ms. (3) mute when power is turned on, the mute function works automatically to prevent noise generation. (here,however,"mute" means the function which prevents noise generation after the reset time.) power on time mute off time (a)when power is on ( fck=1mhz) mute time (about 260msec) reset period internal mode setting time <>the M65855FP adopts adm (adaptive delta modulation) system in a/d,d/a converters. the sampling frequency can be calculated by the following equation; fs=clock frequency /8(hz) for clock frequency fck=1mhz, the calculated sampling frequency is ; fs=1mhz/8=125khz 1) when power is on
electric mitsubishi M65855FP preliminary notice ; this is not a final specification. some parametric limits are subject to change. mitsubishi sound processor ic's ( / 10 ) karaoke 50 series series 8 when the setting change from mute to normal mode,it also mute function work same time as 1) setting. mute off time (b)mute l h change setting (fck=1mhz) mute time (about 260msec) l-h change time 2) when mute signal input delay output can be set the mute control from 15 pin supply voltage. (please refer the following) 15 pin supply voltage h( 3 vcc-1v) ref(1/2 vcc?.5v) l( 1.0v) mode normal mode mute mode (clock stop +microphone output mute) mute(clock stop) mute off time (c)mute r h change setting (fck=1mhz) mute time (about 260msec) internal mode setting time r-h change time
electric mitsubishi M65855FP preliminary notice ; this is not a final specification. some parametric limits are subject to change. mitsubishi sound processor ic's ( / 10 ) karaoke 50 series series (4) input/output lpf it is necessary to change the lpf setting (signal pass band;fsig)of digital echo according to the clock frequency. 10 11 ref c2 r1 r3 r2 c1 a/d lpf fsig= 2 p c1?2?2?3 1 9 gv= 20log r1 r2 when,r1=20k,r2=8.2k,r3=10k,c1=0.012?, c2=4700pf, cut off frequency and voltage gain is following. fsig= 2.3khz gv= -6db the recommend voltage gain and the a/d ,d/a lpf signal pass band, please refer to the table below. ( delay time 164msec (when master clock 1mhz)) a/d lpf d/a lpf signal pass band gain signal pass band gain 3khz -6db 3khz +3db
electric mitsubishi M65855FP preliminary notice ; this is not a final specification. some parametric limits are subject to change. mitsubishi sound processor ic's ( / 10 ) karaoke 50 series series 1 2 3 4 5 6 7 11 12 13 14 15 16 vcc lpf2 out clock gnd echovol echo mute lpf1 in lpf1 out op1 out op1 in op2 in ref lpf2 in op2 out mic in unit resistance: w capacitor:f 0.01 4700p 0.01 + 1 10k application example 10 8 echo out echo in echo volume mic out echo mute 10 9 100 0.1? 2.2 22 24k 0.012 20k 8.2k 0.01 10k 1.0 4.7k 15k 3300p 120k vcc non
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