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| rej03f0170-0201 rev.2.01 jan 25, 2008 page 1 of 13 M65845AFP digital echo with microphone mixing circuit rej03f0170-0201 rev.2.01 jan 25, 2007 description the M65845AFP is a cmos ic built-in digital echo function with microphone peripheral 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. being pin compatible with the m65845fp, the M65845AFP is suitable for upgrading the series. features ? high performance digital echo circuit thanks to 16 kbit memory ? two microphone-mixing lines, vocal cut circuit, digital echo, and line-mixing amplifier are contained, enabling single-chip package of microphone peripheral circuit of karaoke equipment. ? alc-equipped microphone amplifiers permit excessively high-input. alc operating voltage can be set as desired. ? vocal cut circuit of complete stereo construction ? compatibility with the m65845fp ? built-in current-control oscillation circuit ? built-in automatic reset circuit activated with power on ? single power supply (5 v) recommended operating condition ? supply voltage range: v cc = 4.5 v to 5.5 v ? rated supply voltage: v cc = 5 v system configuration lch input rch input mic2 lch output rch output mix alc mix mix echo vol source selector l r mic1 audio sw mic sw alc mic vol mic vol mix digital echo vocal cut
M65845AFP rej03f0170-0201 rev.2.01 jan 25, 2008 page 2 of 13 block diagram d/a lpf1 lpf2 mic sw rout lout clock cont ref lin rin vall a/d logic 16 k ram mic1in mic1nfin mic1out alc1 mic2in mic2nfin mic2out alc2 mic1volin mic2volin ref ref 26 27 1 3 4 2 5 6 8 9 7 10 11 mic out 12 lpf1 in 13 lpf1 out 14 adint in 20 da cont 16 ad cont 15 adint out 23 lpf2in 24 lpf2out 25 echovolin 22 daint out 21 daint in 35 32 17 vcfil 36 audsw2 34 audsw1 33 v cc 19 gnd 18 29 28 31 micecho out 30 1/2v cc clock generator audio source control alc alc M65845AFP rej03f0170-0201 rev.2.01 jan 25, 2008 page 3 of 13 pin arrangement mic1in alc1 mic1nfin mic1out mic1volin mic2in alc2 mic2nfin mic2out mic2volin micout lpf1 out lpf1 in adintin adintout adcont ref gnd 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 llineout micechoout micsw rlineout llinein vcfil valc audsw2 audsw1 clock cont rlinein echovolin lpf2 out lpf2 in daintout daintin dacont v cc M65845AFP (top view) outline: prsp0036ga-a (36p2r-a) M65845AFP rej03f0170-0201 rev.2.01 jan 25, 2008 page 4 of 13 pin description pin no. symbol pin name function 1 mic1in mic1 input connect mic1 2 alc1 alc1 control connect c which determine recovery time 3 mic1nfin mic1 nf input 4 mic1out mic1 output set up mic1 amp gain for feedback circuit 5 mic1volin mic1 volume input connect micr ophone volume which turn down input signal 6 mic2in mic2 input connect mic2 7 alc2 alc2 control connect c which determine alc attack, recovery time 8 mic2nfin mic2 nf input 9 mic2out mic2 output forms mic2 amp gain with feedback 10 mic2volin mic2 volume input connect micr ophone volume which turn down input signal 11 micout mic output mixing ou tput with mic1 and mic2 12 lpf1 in low pass filter 1 input 13 lpf1 out low pass filter 1 output forms the front low pass filter with external cr for digital echo 14 adintin a/d integral input 15 adintout a/d integral output forms integrator with external c and r 16 adcont a/d control ad m a/d adaptive control 17 ref reference 1/2 v cc , connect filter c 18 gnd gnd 19 v cc power supply 20 dacont d/a control adm a/d adaptive control 21 daintin d/a integral input 22 daintout d/a integral output forms integrator with external c 23 lpf2 in low pass filter 2 input 24 lpf2 out low pass filter 2 output forms post low pass filter with external cr for digital echo 25 echovolin echo volume input connect micro phone volume which turn down input signal 26 rlinein rch line input 27 llinein lch line input 28 rlineout rch line output 29 llineout lch line output mixing output with line and microphone 30 micechoout mic echo output mixing output with microphone and echo 31 micsw mic sw l: microphone off, h: microphone on 32 clock cont clock control controls built-in clock generation circuit with external r 33 audsw1 audio sw1 34 audsw2 audio sw2 changing source sound signal 35 valc alc supply voltage control form alc operation voltage with control voltage 36 vcfil vocal cut filter through frequency under vocal level M65845AFP rej03f0170-0201 rev.2.01 jan 25, 2008 page 5 of 13 absolute maximum ratings (ta = 25 c, unless otherwise noted) item symbol rations unit conditions supply voltage v cc 6.0 v circuit current i cc 85 ma input voltage vi ?0.3 to v cc + 0.3 v power dissipation pd 860 mw operating temperature topr ?20 to +75 c storage temperature tstg ?40 to +125 c recommended operating condition limits item symbol min typ max unit conditions supply voltage v cc 4.5 5 5.5 v l input voltage v il 0 ? 1 v h input voltage v ih 4 ? v cc v pin 33, 34 electrical characteristics (v cc = 5 v, f = 1 khz, vi = 100mvrms, fck = 2 mhz, ta = 25 c, unless otherwise noted) limits item symbol min typ max unit conditions total circuit current i cc 25 34 70 ma no signal voltage gain g vo 44 47 50 db vo = ?17 dbv distortion 1 thd1 ? 0.5 1.5 % vo = ?17 dbv, without alc distortion 2 thd2 ? 3.0 6.0 % vi = ?27 dbv, alc operate alc voltage vo alc ?3 0 +3 db at ?10 to +3 dbv alc attack time t alcat 25 40 55 ms at c = 4.7 f alc recovery time t alcre 1.0 1.5 2.0 s at c = 4.7 f maximum output voltage vo max ?1 2 ? dbv thd = 10% noise voltage no ? ?68 ?57 dbv g v = 47 db, jis-a, vi = 0 vrms microphone amplifier input impedance zi 5 10 20 k delay time td 167 197 226 ms r c = 51 k voltage gain gv ?3 0 +3 db distortion thd ? 2.0 4.0 % maximum output voltage vo max ?3 +1 ? dbv thd = 10% echo noise voltage no ? ?82 ?67 dbv jis?a voltage gain gv ?3 0 +3 db distortion thd ? 0.02 0.1 % maximum output voltage vo max 1 4 ? dbv thd = 10% noise voltage no ? ?97 ?88 dbv jis-a, micsw = off line input impedance zi 10 20 40 k noise voltage no ? ?95 ?72 dbv jis-a, vocal cut on voltage gain gv ?3 0 +3 db input one side channel maximum output voltage vo max 1 4 ? dbv thd = 10% vocal cut vocal rejection ratio g rej 14 18 ? db M65845AFP rej03f0170-0201 rev.2.01 jan 25, 2008 page 6 of 13 function description microphone amplifier the gain (g v ) and low cut-off frequency (fcl) of microphone amplifier are expressed as follows. g v = 20log ? r1 + 1.5 k + 334 k r1 + 1.5 k 1 2 ? (r1 + 1.5 k) ? c1 fcl = g v (max) = 47 db, fcl = 50 hz r1 = 0 , c1 = 2.2 f assuming g v = 37 db, fcl = 15 hz, for instance, the constants take the following values. r1 = 3.3 k , c1 = 2.2 f mic + ? 5 k 10 k (typ) r1 c1 1.5 k 334 k 1 f + 2 3 4 ref + M65845AFP rej03f0170-0201 rev.2.01 jan 25, 2008 page 7 of 13 alc level block diagram ?60 ?50 ?40 ?30 ?20 ?10 ?30 ?20 ?10 0 10 alc supply voltage control limits it is set 47 db for microphone amplifier gain. vo (dbv) vi (dbv) +3 alc operation voltage control alc operation voltage can be formed within the limits of ?10 to +3 dbv controlled by dc control voltage which connect pin 35. (setting up forms) 35 pin control voltage v alc 0 v 2.5 v ( v cc ) 1 2 1 2 v alc = v cc ? vpo internal direct bias half peak voltage vpo when alc operation voltage is ?5 dbv (at v cc = 5 v) ?5 dbv = 0.56 vrms = 1.59 vp-p = 0.80 vp-o v alc = 2.5 ? 0.8 = 1.7 v are concerned. M65845AFP rej03f0170-0201 rev.2.01 jan 25, 2008 page 8 of 13 input impedance to pin 35 is so high (1 m ) that alc base voltage can be determined by division resistance. 35 r16 r17 (51 k ) c33 (0.01 f) v cc at v cc = 5 v alc operation voltage (dbv) pin 35 control voltage valc (v) resistance r16 ( ) +3 0.50 5.6 k 0 1.09 15 k ?2 1.38 20 k ?4 1.61 24 k ?6 1.79 27 k ?8 1.94 33 k ?10 2.05 36 k mic sw input low level to pin 31 (mic sw), then microphone and echo signal can be cut. pin 31 (mic sw) mic sw echo signal output h or open on on l off mute audio source select changing the switch, sound source changes four patterns matching with karaoke soft. pin 33 audsw1: d1 pin 34 audsw2: d2 movements l l stereo l h lch monaural h l rch monaural h h vocal cut 1. stereo under the conditions usual 2ch are played back to each outputs. 2. lch monaural under the conditions lch source is played back to 2ch outputs and suitable for karaoke reproduction of multiple karaoke soft and main sound reproduction of laser disks. 3. rch monaural under the conditions rch source is played back to 2ch outputs and suitable for reference vocal reproduction of multiple karaoke soft and sub sound reproduction of laser disks. M65845AFP rej03f0170-0201 rev.2.01 jan 25, 2008 page 9 of 13 4. vocal cut it is a method turned down lch and rch input having the same phase and sound. low pass cut off frequency fc is dete rmined by a capacitance which connect to pin 36 (vocal cut filter). it is also having a function which through frequency under vocal level for supplying a lack of low level sound. 36 r vc = 20 k (typ) c34 1 2 ? r vc ? c34 fc = at fc = 50 hz, c34 = 0.15 f is determined. caution: inside resistance is chan geable one by one which rate is 30%. digital echo 1. clock oscillator circuit this ic incorporates a current control type clock oscillator circuit in it, thus providing circuit configuration just by connecting an r c for current control pin 32 (clock cont). fully internal clock supply prevents occurrence of undes ired radiation without affecting any external circuit. the oscillator frequency fck is following. fck = 2 mhz (r c = 51 k ) r c dc current 32 clock oscillator circuit clock frequency: fck note: the delay time (td) for echo is determined by the clock frequency (fck). delay time = 1/fck 24 n (n = the number of memory bits = 16384) fck = 2 mhz (rc = 51 k ): delay time = 197 ms fck = 2.6 mhz (rc = 39 k ): delay time = 150 ms fck = 3.9 mhz (rc = 24 k ): delay time = 100 ms M65845AFP rej03f0170-0201 rev.2.01 jan 25, 2008 page 10 of 13 2. auto mute function the ic carries out auto mute function at the time of powering up and switching on mic sw in order to suppress shock noise that the digital delay may produce. reset time mute time (400 ms) ? at power up switching on mic sw mic sw off mute time (400 ms) ? at switching on mic sw 3. input and output lpf signal through frequency fsig is also determined by lpf of digital echo cut off frequency. 2 degree lpf of digital echo is formed by external resistance and capacitor. (refer to next figure) so, cut off frequency is determined by next formula. fsig = 1 2 r8 ? r9 ? c13 ? c14 lpf1 + ? 12 r7 24 k ref r8 24 k c13 c14 r9 24 k 13 lpf2 + ? 23 r7 24 k ref r8 24 k c13 c14 r9 24 k 24 M65845AFP rej03f0170-0201 rev.2.01 jan 25, 2008 page 11 of 13 compatibility with m65845fp M65845AFP rej03f0170-0201 rev.2.01 jan 25, 2008 page 12 of 13 application example microphone amplifier : g v = 47 db, fcl = 50 hz alc operating voltage ?4 dbv echo : delay time 197 ms (fs = 83.3 khz) cut-off frequency 3.1 khz 1 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 36 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 mic1 mic2 v cc v cc v cc mic sw feed back micin alc1 mic1out mic1volin mic1nfin mic2in alc2 mic2nfin mic2out mic2volin micout lpf1in lpf1out adintin adintout adcont ref gnd vcfil vcc dacont daintin lpf2out lpf2in echo volin rlinein llinein daintout rlineout llineout micecho out micsw clock cont audsw1 audsw2 valc 5k 1 4.7 2.2 1 5k 1 4.7 2.2 1 0.047 24k 24k 1000p 24k 0.068 0.1 47 0.15 0.01 51k 24k lout 2.2 rout 2.2 lin 1 rin 1 1 24k 0.068 0.047 24k 24k 1000p 0.1 0.1 100 d2 d1 51k 0.15 50k 1 30k 1 30k 1 30k M65845AFP units r: c: f M65845AFP rej03f0170-0201 rev.2.01 jan 25, 2008 page 13 of 13 package dimensions y index mark 1 18 19 36 f *1 *2 *3 e h e d e b p a c detail f a 2 l a 1 include trim offset. dimension "*3" does not note) do not include mold flash. dimensions "*1" and "*2" 1. 2. previous code jeita package code renesas code prsp0036ga-a 36p2r-a mass[typ.] 0.5g p-ssop36-8.4x15-0.80 0.2 0.15 0.13 0.5 0.4 0.35 max nom min dimension in millimeters symbol reference 15.2 15.0 14.8 d 8.6 8.4 8.2 e 2.0 a 2 12.23 11.93 11.63 2.4 a 0.05 0.7 0.5 0.3 l 10 0 c 0.8 e 0.15 y h e a 1 b p 0.65 0.95 notes: 1. this document is provided for reference purposes only so that renesas customers may select the appropriate renesas product s for their use. renesas neither makes warranties or representations with respect to the accuracy or completeness of the information contained in this document nor grants any license to any intellectual property rights or any other rights of renesas or any third party with respect to the information in this document. 2. renesas shall have no liability for damages or infringement of any intellectual property or other rights arising out of t he use of any information in this document, including, but not limited to, product data, diagrams, charts, programs, algorithms, and application circuit examples. 3. you should not use the products or the technology described in this document for the purpose of military applications such as the development of weapons of mass destruction or for the purpose of any other military use. when exporting the products or technology described herein, you should follow the applicable export control laws and regulations, and procedures required by such laws and regulations. 4. all information included in this document such as product data, diagrams, charts, programs, algorithms, and application ci rcuit examples, is current as of the date this document is issued. such information, however, is subject to change without any prior notice. before purchasing or using any renesas products listed in this document, please confirm the latest product information with a renesas sales office. also, please pay regular and careful attentio n to additional and different information to be disclosed by renesas such as that disclosed through our website. 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