View KB22688_7700446.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

KB22688 tv sound mps for two carrier system 32-sdip-400 device package operating temperature KB22688 32-sdip-400 -10 c ~ + 70 c one- chip tv sound mpx ( two - carrier system ) the KB22688 is a monolithic integrated circuit designed for demodulating two carrier tv-mpx broadcast. features 1st & 2nd sound if double-pll fm detection agc for cca part matrix for multi - sound broadcasts pilot detector external control interface id indicators ( stereo , bilingual ) features available for korea standard non-clipping output up to 400% modulation with agc available in dc control, normal u-com control or iic bus control systems id output : direct led drive or iic serial data output non-adjust ordering information
KB22688 tv sound mps for two carrier system block diagram 28 29 30 32 2 3 4 5 25 19 31 17 26 27 lpf pd limiter am det 55k bpf id bpf digital freq. detector vco 1/2 1/32 voltage ref 100k lpf 30k lpf comp dn cut mn det mut drive dc/u-com auto det intec. 24 23 22 21 20 if 1st pll 2st pll if 1st pll 2st pll 6 7 a a 8 9 10 11 12 13 cca cca agc 14 a a 4 mode matrix 18 15 + 16 1 vdd vss lbc ofc ado fdi bib stb en scl sda ro lo gnd vcc agc s1i s2i s1o s2o ac2 ac1 lpc1 lpc2 if1 bp1 if2 bp2 rc ipc1 ipc2 ipr
KB22688 tv sound mps for two carrier system absolute maximum ratings ( ta = 25 c ) recommended operating conditions electrical characteristics (vcc = vdd = 5v, fm = 1khz, vi = 80dbu, ta = 25 c, d f = 25khz , unless otherwise specified ) condition condition unit min typ max unit unit value symbol characteristics vi = 0 maximum supply voltage power dissipation operating temperature storage temperature v mw c c 6 1000 - 10 ~ + 70 - 40 ~ + 125 vccmax pd topr tstg symbol symbol characteristics characteristics operating voltage 4.5 v 5.5 5 vopr min typ max total circuit 1 total circuit 2 input limitng voltage am rejection ratio input impedence pilot input sensitivity id on time id off time output level matrix thd noise output (rf off) output impedence separation ratio cross talk matrix s/n ratio mute attenuation ratio sif pilot matrix vi = 0 vi = 0 - am 30 % mod. - - mono ? st,bi st, bi ? mono - - d f = 100khz carrier off - d f = 25 khz d f = 25khz d f = 25khz d f = 25 khz (st) d f = 25khz icc idd vlim amrr zin vps ton toff vo thdm1 thdm2 voff zout sep ct s/n s/ n( st) amute ma ma dbu db kohm dbu sec sec mvrms % % mvrms ohm db db db db db 80 5 50 - - 50 1.5 0.3 500 1.0 10 370 50 - - - - -55 60 - - 45 1 - 1.0 - 370 0.2 0.5 50 - 45 55 60 55 -66 35 - - 40 - - - - 280 - - - - 40 50 55 50 -
KB22688 tv sound mps for two carrier system pin configuration 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 KB22688 gnd if2 bp2 bp1 if1 lpc2 lpc1 ac1 ac2 s1o s1i s2o s2i agc lo vcc rc lbc ipc2 ipc1 ipr fdi ado vdd bib st en scl sda vss ro ofc
KB22688 tv sound mps for two carrier system pin configuration description pin no. description pin no. analog gnd sif 2 input sif 2 bypass sif 1 bypass sif1 input sif 2 lpf capacitor sif 1 lpf capacitor sif 1 amplifier capacitor sif 2 amplifier capacitor sif 1 det output sif 1 cca input sif 2 det output sif 2 cca input agc detect capacitor l output analog vcc 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 id filter offset canceling cap. r output digital vss data input / output ( sda ) clock input ( scl ) enable input ( en ) id indicator ( stereo ) id indicator ( bilingual ) digital vdd am det output freq. det input id pll vco resistor id pll vco capacitor pin 1 id pll vco capacitor pin 2 limiter bypass capacitor voltage reference capacitor 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
KB22688 tv sound mps for two carrier system internal pin description equivalent circuit description function symbol pin no - - analog ground gnd 1 sif signal input through a sif filter sif input pin sif 2, sif 1 2, 5 if bypass pin is grounded with a capacitor if bypass pin bp 2, bp 1 3, 4 bp 1 (bp2) if 1 (if 2) lpc1 (lpc2) the external capacitor extracts dc level from the 1st pll output of fm det pll lpf pin lpc 2, lpc 1 6, 7 negative feedback pin of fm det amplifier grounded with a capacitor det amp nf pin ac 1, ac 2 8, 9 ac1 (ac2)
KB22688 tv sound mps for two carrier system internal pin description equivalent circuit description function symbol pin no fm det output s1o, s2o 10, 12 fm det output pin connedted with a de- emphasis circuit input pin of current control amplifier (cca). fm detected output signal is added to this pin fm detected signal input pin s1i s2i 11, 13 agc detect pin is grounded through a capacitor. if the signal level is over the predetermined value, this terminal ? s voltage will be raisen. agc function can be deactivated by connect this terminal to gnd. agc det pin agc 14 audio output signal is provided from this terminal matrix output pin lo, ro 15, 18 s1o (s2o) s1i (s2i) agc lo (ro)
KB22688 tv sound mps for two carrier system internal pin description equivalent circuit description function symbol pin no analog power vcc - - 16 the external capacitor is used to eliminate offset of id filter . it is the data communication line of iic bus used to exchange the u-com data and ic internal data . clock line of iic bus. id bpf offset cancel pin ofc 17 digital ground vss - - 19 serial data in & data out sda 20 it is always ? h ? in dc control system, always ? l ? in iic bus system, and used as strobe port in nor- mal u-com system. clock signal scl 21 enable select pin en 22 when id is detected as ? stereo ? , this pin will remain ? l ? ( open drain) stereo indicator pin stb 23 when id is detected as ? bilingual ? , this pin will remain ? l ? ( open drain) bilingual indicator pin bib 24 ofc sda scl en stb bib
KB22688 tv sound mps for two carrier system internal pin description equivalent circuit description function symbol pin no am det output pin ado 26 am detected signal will output from this terminal. am detected signal goes into this terminal coupled with a capacitor to remove dc offset. connected external resistor. this resistor is used to set vco current . frequency det in fdi 27 id pll vco resistor pin ipr 28 connected external capa- citor. this capacitor determines the oscillation freq. of vco id pll vco resistro pin ipr 29, 30 ado fdi ipc1 ipc2 ipr
KB22688 tv sound mps for two carrier system internal pin description 25 vdd power - - supply (digital) equivalent circuit description function symbol pin no limiter bypass capacitor pin lbc 31 ground through capacitor to extract dc level of output signal from the sc bpf output amplifier to the pd ( phase detector ) of id pll. connect to capacitor to sta- blize the reference voltage voltage reference capacitor pin rc 32 lbc rc
KB22688 tv sound mps for two carrier system operation description ? system KB22688 consists of if amp, fm det, agc, matrix, u-com interface and id det blocks. all blocks are non-abjust operable and available for korea standard broadcast system. - if amp block this block amplifies the provided if signal to a detectable level of fm det. total gain is over 60db and bandwidth is above 3 mhz . ? fm det KB22688 adopts non-adjust double-pll type fm detection circuits. 1st pll has a role of chasing fm carrier frequency with wide holding range ( for example, hold range is 2mhz ) and 2nd pll does actual fm detection with narrow holding range ( about 300khz ), its free running frequency is equal to fm carrier frequency that is detected by 1st pll as mentioned before, the free running frequency of 2nd pll is determined by 1st pll and the free running frequency of 2nd pll can be varied according to fm carrier frequency ( korea is 4.5mhz ).when 100% fm modulated signal is provided, the amplitude of the output signal at fm output port is 100mvrms. agc the agc block comprises agc detector part and cca part ( current control amplifier ).the matrix output signal level is set to 370mvrms when applied 100% modulated fm signal and supply voltage is 5v. as the gain of cca is about 5db and the gain of matrix is 6db , so the output signal level of cca is 185mvrms and the matrix output is 370mvrms. if over- modulated ( over 200% ) fm signal is added to KB22688 input port, the output will be clipped by supply voltage dynamic limitation range ( the linear amplify range is limited lower than 800mvrms). to prevent this problem, in KB22688 we use agc circuit to reduce the gain of cca part when the over- modulated fm signal has been applied, agc circuit is deactivated until the modulation is over 200 %. if agc is activated, the thd and separation characteristes of output signal would be deteriorated because the gain of cca is varied according to modulation ratio. matrix matrix part separates provided fm detected signal into mono, stereo, bilingual, and sub according to braodcast status and end user ? s setting , it mainly consists of analog switches and operational amplifiers. the input and output signal format of matrix is shown as follows. input broadcast mode remark s2 s1 stereo bilingual mono * can be main l - r sub none * l + r main main output broadcast mode mono sub bilingual stereo stereo bilingual mono rout 2 r main main lout 2 l main main rout l + r sub main lout l + r main main rout l + r main main lout l + r main main rout l + r sub main lout l + r sub main user select
KB22688 tv sound mps for two carrier system id det id signal is fm modulated to second carrier (sif2) with a 2.5khz fm modulation after am modulated to 55khz pilot sub-carrier with a 50% am modulation. id det part consists of 3 blocks : that is filter block for extracting pilot carrier, am detector block for am detection of id signal and digital block for detecting the frequency of provided id signal logically. in the filter block, audio signal is removed by hpf and pilot signal is extracted by the automatically adjusted switch - capacitor bpf(band pass filter) with a center frequency of 55khz. id signal is extracted from the pilot carrier in the am detector block , then digital block detects the frequency of id signal, the id signal can be detected in the range shown as follow: high off 176hz 312hz high on 160hz 300hz low on 140hz 255hz id stereo ( 150hz ) bilingual ( 276hz ) low off 125hz 237hz for id detector, the transition time from mono to multi sound mode ( stereo or bilingual ) is about 1 sec and from multi sound mode to mono transition is about 0.3 sec as to avoid detection error. KB22688 has 2 types of id output ; one is serial data out in iic bus u-com control mode, the other is open drain type dc output, it can drive led directely. 2 u-com KB22688 is available in dc control, normal u-com control, and iic bus u-com control system, and it can distinguish the control type automatically by monitoring pin 22(en) status. the relation of control source type and pin 22 status is shown as follows. a) protocol of iic bus u-com control ( pin 22: l ) the KB22688 can be controlled via the 2-line iic bus by the u-com. the two lines ( sda - serial data. scl - serial clock ) exchange information between the devices connected to the iic bus. both sda and scl are bidirectional lines which is connected to a positive supply voltage via a pull up resistor. when the bus is free both lined are high. the data on the sda line must be stable during the high period of the clock. the high or low data can only change when the clock signal line is low. a high -to -low transition of the sda line while scl is high is defined as a start condition. a low- to - high transition of the sda line while scl is high is defined as a stop condition. the bus receiver will be reset by the reception of a start condition and is considered to be busy after the start condition. after a stop condition the bus is considered as free again. 1st byte : 1 ~ 7th bit 8th bit - r/w 9th , 18th, 27th bit ---- acknowledge en ( pin 22) dc control always ? h ? iic bus always ? l ? normal u-com u -com strobe sda scl 3 2 1 27 26 25 slave address : write 84h, read 85h
KB22688 tv sound mps for two carrier system 2nd bype : 10th ~ 17th bit ---- sub address ( function ) 3rd bype : 19th ~ 26th bit ---- data ( d1 ~ d8 ) data transmitted to the KB22688 starts with the module address as follows: b) protocol of normal u-com control ( pin 22: strobe ) 1st byte : 1 ~ 7th bit ---- chip select code ( 1000010b ) 8th bit ---- not use ( don ? t care ) 2nd bype : 9th ~ 16th bit ---- function assignment 3rd bype : 17th ~ 24th bit ---- data ( d1 ~ d8 ) the module address of KB22688 in normal u-com control mode is as follows. the maximum strobe pulse width in normal u-com control mode should be under 6.0 msec. if the strobe pulse width excess the limit, KB22688 will be changed to dc control mode. c) control item in each control mode in each control mode, control items is limited as follows. *** definitions *** * pre-set : when power is on, u-com initials the status of KB22688 to pre-set status. ( all ic has same pre-set status data ) * pre-adjust set : when power is on, u-com initials the status of KB22688 to pre-measured and stored status. ( different each ic ) * data transmission : transmit stored data to u-com when u-com requests. * receive acknowledge : return acknowledge signal to u-com after data receipt. sda scl strobe (en) 3 2 1 24 23 22 lsb * msb first d msb 0 0 0 0 1 0 1 pre-set receive acknow -ledge data transmi -ssion pre- adjust set mode change mute lsb * msb first ack r/w msb 0 0 0 0 1 0 1 control o x x o x x o x x o o x o o x o o o iic bus normal u-com dc control
KB22688 tv sound mps for two carrier system d) u-com control map ** in iic bus mode, slave address = write : 84h, read : 85h ** in normal u-com mode, chip select code = 1000010b ic marker test 011xxxxx sub address (2nd byte) (msb <-> lsb) 000xxxxx (mode control) 001xxxxx (mute control ) 010xxxxx (test mode ) 100xxxxx 111xxxxx 101xxxxx 110xxxxx (test mode ) msb data (3rd byte) remark function lsb d1 d2 d3 d4 d5 d6 d8 d7 mono stereo bilingual sub mute off mute on korea not use not use not use sep. adjust* not use operating not use x x x x x x x x x x d3 x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x d5 x x x x x x x x x x x x x x x d4 x x x x x 0 0 1 1 x x 0 0 1 x d2 x 0 0 1 0 1 0 1 0 1 0 1 x x d1 x 0 1 x end user control set maker setting not use not use ic maker test * msb first * when power is on, all latch datas are ? 0 ? , so, KB22688 is set to mono off, mute off, separation adjust default (00001xxx). ? * separation adjust data d1d2d3d4d5 d1d2d3d4d5 d1d2d3d4d5 0 0 0 0 0 (min) <-- - 0 0 0 0 1 (typ) ----> 1 1 1 1 1 (max) e) control function descriptiom * mode control : control the matrix structure according to broadcast status and end user ? s setting. KB22688 has 4 modes ( mono, stereo, bilingual and sub ) * mute control : when mute control is on , the audio output of KB22688 is off . * sep. adjust : the separation characteristic of KB22688 in stereo mode can be controlled by iic bus. this option controls s2 fm demodulated output signal level so as to make the separation characteristic in best status. * test mode : ic maker ? s test item. f) dc control map ( pin22: h ) function sda dc ( logic ) input scl mono stereo bilingual sub 0 0 1 1 0 1 0 1
KB22688 tv sound mps for two carrier system g) read mode in iic bus u-com control mode KB22688 can transmit the data which is registered inside ic to the u-com in iic bus control system. if the 8th bit of module address is ? h ? , it means u-com requests the data stored in the ic and KB22688 enter data transmission mode. during the read mode, KB22688 ignores the data the data of 2nd bype ( sub address ) and transmits the internal data within the period of 3rd byte. the sda line of u-com should be maintain ? h ? to accept transmitted data from ic. the format of read data is as follows. h) others in iic bus control system, if the slave address is correct, the acknowledge signal will be generated by KB22688 nomatter the sub address is right or wrong , when sub address is wrong ic will do nothing. 8 1 7 0 6 zc 5 zc 4 st 3 bi 2 st 1 bi bit of 3rd byte transmit data 0011 : mono 1001 : bilingual 0110 : stereo 1100 : used in st ? bi mode transition other case : transmission error option for ic marker. (zc : ic test option )
KB22688 tv sound mps for two carrier system application circuit 1 (rlc type,non-adjustment) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 KB22688 + + + + + + + + + + + + 2nd sif 4.72mhz sif 1st sif 4.5mhz 0.047u 0.047u 3p 1u 1u 10u 10u 0.039u 4.7u 10u 0.039u 4.7u 4.7u lout vcc 10u 4.7u sda scl en stereo out (open drain) bilingual out (open drain) vdd 2.2u 1u 2k( ?? 1%) 56p( ?? 2%) 0.1u 0.01u from / to u-com rout 330 330 2.2mh 18nf 1m
KB22688 tv sound mps for two carrier system 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 KB22688 + + + + + + + + + + + + 2nd sif 4.72mhz sif 1st sif 4.5mhz 0.047u 0.047u 3p 1u 1u 10u 10u 0.039u 4.7u 10u 0.039u 4.7u 4.7u lout vcc 10u 4.7u sda scl en stereo out (open drain) bilingual out (open drain) vdd 2.2u 1u 33k 56p 0.1u 0.01u from / to u-com rout 330 330 application circuit 2 (vr type,low cost) 1m
KB22688 tv sound mps for two carrier system 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 KB22688 + + + + + + + + + + + + 2nd sif 4.72mhz sif 1st sif 4.5mhz 0.047u 0.047u 3p 1u 1u 10u 10u 0.039u 4.7u 10u 0.039u 4.7u 4.7u lout vcc 10u 4.7u sda scl en stereo out (open drain) bilingual out (open drain) vdd 2.2u 1u 2k( ?? 1%) 1p 0.1u 0.01u from / to u-com rout 330 330 application circuit 3 (crystal type,high stability) 3.58mhz x-tal 1m
KB22688 tv sound mps for two carrier system application circuit 4 (rc type,non-adjustment) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 KB22688 + + + + + + + + + + + + 2nd sif 4.72mhz sif 1st sif 4.5mhz 0.047u 0.047u 3p 1u 1u 10u 10u 0.039u 4.7u 10u 0.039u 4.7u 4.7u lout vcc 10u 4.7u sda scl en stereo out (open drain) bilingual out (open drain) vdd 2.2u 1u 2k( ?? 1%) 56p( ?? 1%) 0.1u 0.01u from / to u-com rout 330 330 1m
KB22688 tv sound mps for two carrier system note: 1. the characteristic of sif filter should be suitable to mpx sound system. we suggest to use murata co. products: sfsh4.5mcb and sfsh4.72mcb. 2. for vr type , we can adjust the variable resistor by testing the waveform of pin28, it is not fine adjusted until the duty ratio of square wave is just 50%. 110khz 0.5t 3. you can select the pll osc external components among 4 type: type item plc vr crystal rc stability middle low high middle cost middle middle high low ajustment no need no no ext.components 3 2 3 2 4. program control mathod: 1) install: run KB22688.exe 2) keyboard setup: [number lock] --- off , [caps lock] --- on 3) control mode select: i: iic bus mode , n: u-com mode , d: dc control mode 4) control item: mode select , mute set up , seperation adjust. 5) exit: cap olck off , ctl+ c 5. pc parallel prot pin description: pin 2 3 4 18 signal sck sda en end
KB22688 tv sound mps for two carrier system test circuit 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 KB22688 + + + + + + + + + + + 0.047u 0.047u 3p 1u 1u 10u 10u 0.039u 4.7u 10u 0.039u 4.7u 4.7u lout vcc 10u 4.7u sda scl en vdd 1u 2k( ?? 1%) 56p( ?? 1%) 0.1u 0.01u rout sif2 s s sif1 0.047u 0.047u m m m m 47k x 2 100k x 2 st bib
KB22688 tv sound mps for two carrier system package dimension #1 32 16 17 32 - sdip - 400 9.10 ?? 0.2 1.778 0.45 ?? 0.1 (1.37) 1.00 ?? 0.1 3.80 ?? 0.2 5.08max 3.30 ?? 0.3 0.51min dimensions in milimeters 10.16 0 - 15 ? 0.25 ?? 0.1 0.15

▲Up To Search▲

Price & Availability of KB22688

	To Download KB22688 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .