60910hkim 20100427-s00009 no.a1744-1/9 LC72725KVS overview the LC72725KVS is ics that implement the signal processing required by the european broadcasting union rds (radio data system) standard and by the us nrsc (na tional radio system committee) rbds (radio broadcast data system) standard. these ics include band- pass filter, demodulator,and data buffer on chip. rds data can be read out from this on-chip memory by external clock input in slave operation mode. functions ? bandpass filter : switched capacitor filter (scf) ? rds demodulation : 57khz carrier and rds data clock regeneration, biphase decode, differential decode. ? buffer : 128 bit (about 100ms) can be restored in the on-chip data buffer. ? data output : master or slave output mode can be selected. ? rds-id : detect rds signal which can be reset by rst signal input. ? standby control : crystal oscillator can be stopped. ? fully adjustment free ? low voltage ordering number : ena1744 cmos ic rds(rbds) demodulation ic specifications of any and all sanyo semiconductor co.,l td. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer ' s products or equipment. to verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer ' sproductsor equipment. any and all sanyo semiconductor co.,ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, av equipment, communication device, office equipment, industrial equ ipment etc.). the products mentioned herein shall not be intended for use for any "special application" (medica l equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, t ransportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of re liability and can directly threaten human lives in case of failure or malfunction of the product or may cause har m to human bodies, nor shall they grant any guarantee thereof. if you should intend to use our products for app lications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. if there is n o consultation or inquiry before the intended use, our customer shall be solely responsible for the use.
LC72725KVS no.a1744-2/9 specifications absolute maximum ratings at ta = 25 c, v ss d = v ss a = 0v parameter symbol pin name conditions ratings unit maximum supply voltage v dd max v dd d, v dd a v dd a v dd d+0.3v -0.3 to +6.5 v v in 1 max test, mode, rst -0.3 to +6.5 v v in 2 max xin, rdcl -0.3 to v dd d+0.3 v maximum input voltage v in 3 max mpxin, cin -0.3 to v dd a+0.3 v v o 1 max rds-id(ready) -0.3 to +6.5 v v o 2 max xout, rdda, rdcl -0.3 to v dd d+0.3 v maximum output voltage v o 3 max flout -0.3 to v dd a+0.3 v i o 1 max xout, flout, rdda, rdcl +3.0 ma maximum output current i o 2 max rds-id(ready) +20.0 ma allowable power dissipation pd max (ta 85 c) 100 mw operating temperature topr v dd = 3.0v to 5.5v -40 to +85 c storage temperature tstg -40 to +125 c allowable operating ranges at ta = -40 to +85 c, v ss d = v ss a = 0v, v dd d = v dd a = 3.0v to 5.5v ratings parameter symbol pin name conditions min typ max unit supply voltage v dd v dd d, v dd a ta = -40 to +85 c 3.0 5.5 v v ih 1 test, mode, rst 0.7v dd d 6.5v input high-level voltage v ih 2 rdcl 0.7v dd d v dd dv input low-level voltage v il test, mode, rst, rdcl 0 0.3v dd dv v o 1 rdda, rdcl v dd dv output voltage v o 2 rds-id(ready) 6.5 v v in mpxin f = 57 2khz 1.6 50 mvrms input amplitude vxin xin 400 1500 mvrms guaranteed crystal oscillator frequencies xtal xin, xout ci 120 4.332 mhz crystal oscillator operating range txtal xin, xout fo = 4.332mhz 100 ppm rdcl setup time tcs rdcl, rdda 0 s rdcl high-level time tch rdcl 0.75 s rdcl low-level time tcl rdcl 0.75 s data output time tdc rdcl, rdda 0.75 s ready output time trc rdcl, ready 0.75 s ready low-level time trl ready 107 ms
LC72725KVS no.a1744-3/9 electrical characteristics at ta = -40 to +85 c, v ss d = v ss a = 0v, v dd d = v dd a = 3.0v to 5.5v ratings parameter symbol pin name conditions min typ max unit internal feedback resistance rf xin 1.0 m hysteresis vhis test, mode, rst, rdcl 0.1v dd d v v ol 1 rdda, rdcl i = 2ma 0.4 v output low-level voltage v ol 2 rds-id(ready) i = 8ma 0.4 v output high-level voltage v oh rdda, rdcl i = -2ma v dd d-0.54 v i ih 1 test, mode, rst, rdcl v i = 6.5v 5.0 a input high-level current i ih 2 xin v i = v dd d 2.0 11 a i il 1 test, mode, rst, rdcl v i = 0v 5.0 a input low-level current i il 2 xin v i = 0v 2.0 11 a output off leakage current ioff rds-id(ready) v o = 6.5v 5.0 a current drain i dd v dd d+v dd a v dd d+v dd a (v dd d = v dd a = 3.3v) 1.5 2.5 3.5 ma bandpass filter characteristics at ta = 25 c, v ss d = v ss a = 0v, v dd d = v dd a = 3.0v to 5.5v ratings parameter symbol pin name conditions min typ max unit rmpxin mpxin-v ss a f = 57khz 100 k input resistance rcin cin-v ss a f = 57khz 100 k center frequency fc flout 56.5 57.0 57.5 khz -3db band width bw-3db flout 2.5 3.0 3.5 khz gain gain mpxin-flout f = 57khz 28 31 34 db att1 flout f = 7khz 30 db att2 flout f<45khz, f>70khz 40 db stop band attenuation att3 flout f<20khz 50 db reference voltage output vref vref v dd a = 3v 1.5 v
LC72725KVS no.a1744-4/9 package dimensions pin assignment unit : mm (typ) 3178b block diagram lc72725kv top view 8 7 6 54321 9 10 11 1213141516 xout test cin flout v ss a v dd a mpxin vref rds-id/ready rdcl rdda rst mode v dd d xin v ss d reference voltage cin flout vref vref antialiasing filter 57khz bpf (scf) smoothing filter mpxin +3v v dd a v ss a pll (57khz) clock recovery (1187.5hz) +3v v dd d rds-id/ ready rst v ss d data decoder xout xin test test clk(4.332mhz) osc ram (128bit) rdda rdcl rds-id detect mode sanyo : ssop16(225mil) 5.2 4.4 6.4 0.22 0.65 (0.33) 18 9 16 0.5 0.15 1.5max 0.1 (1.3)
LC72725KVS no.a1744-5/9 pin descriptions pin no. pin name i/o function pin circuit 3 vref output reference voltage output (v dd a/2) 4 mpxin input baseband (multiplexed) signal input 7 flout output subcarrier output (filter output) 8 cin input subcarrier input (comparator input) 5 v dd a - analog system power supply (+3v) - 6 v ss a - analog system ground - 14 xout output crystal os cillator output (4.332mhz) 13 xin crystal oscillator input (external reference signal input) 9 test test input 10 mode read out mode (0:master, 1:slave) 15 rst input rds-id/ram reset (active high) 2 rdda output rds data output 16 rdcl i/o rds clock output (master mode) / rds read out clock input (slave mode) 1 rds-id/ ready output rds reliability data output (high:data with high rds reliability low: data with low rds reliability) ready output (active high) 12 v dd d - digital system power supply (+3v) - 11 v ss d - digital system ground - v dd a v ss a v dd a v ss a v dd a vref v ss a v dd d xout xin v ss d s v ss d v ss d v dd d v ss d s v ss d v dd d
LC72725KVS no.a1744-6/9 input/output data format test mode circuit operation mode rdcl pin rds-id/ready pin 0 0 master read out mode cl ock output rds-id output 0 1 slave read out mode clock input ready output 1 0 standby mode (crystal oscillator stopped) - - 1 1 ic test mode which is not available to user applications. - - rst pin rst = 0 normal operation rst = 1 rds-id ? demodulation circuit clear + ready ? memory clear (when slave mode) rds-id/ready pin master mode rds-id output (active-high) slave mode ready output (active-high) note: rds-id(ready) pin is an n-channel open-drain output, and requires an external pull-up resistor to output data. rdcl/rdda output timi ng in master mode rds-id output timing note: rds-id is high: data with high rds reliability, low: data with low rds reliability 421 s 421 s 17 s 17 s t p 1 t p 21 rdcl out p ut rdda out p ut rdda rdcl high/low high/low high/low high/low high/low high/low high/low rds-id
LC72725KVS no.a1744-7/9 rst operation in master mode note: rdcl and rdda outputs keep high level after input of rst until rds detection circuit output is detected. rdcl operation in slave mode ratings parameter symbol pin name conditions min typ max unit rdcl setup time tcs rdcl,rdda 0 s rdcl high-level time tch rdcl 0.75 s rdcl low-level time tcl rdcl 0.75 s data output time tdc rdcl,rdda 0.75 s ready output time trc rdcl,ready 0.75 s ready high-level time trh ready 107 ms rdcl rdda rdsdetection circuit output (ic internal) rst tp3 250ns ? rdda rdcl ready t ch t cl t cs t cs t dc t rc t rh
LC72725KVS no.a1744-8/9 notes: 1. rdcl input must be started after ready signal goes high. when ready signal is low, rdcl must be low level. 2. ready status must be checked after trc time from rdcl is set low. if the ready status is high, then next read cycle can be continued. if the ready status is low, next rdcl clock input must be stopped. 3. if the above condition is satisfied, rds data (rdda) ca n be read out at both rising and falling edge of rdcl. 4. ready signal goes low after the last data is read out from on-chip memory. if one rds data is stored in the memory, ready signal goes high again. 5. when the reception channel is changed, a memory an d ready reset must be applied using rst input. if a reset is not applied, reception data from the previous channel may remain in memory. if rst input is applied, reception data is not stored in memo ry until the first rds-id is detected, and ready output goes high after the first rds-id is det ected. after the first rds-id is detected, reception data is st ored even if rds-id is not detected. 6. the readout mode may be switched between master and slave modes during readout. applications must observe the following points to assure data continuity during this operation. 1) data acquisition timing in master made data must be read on the falling edge of rdcl 2) timing of the switch from master mode to slave mode after the rdcl output goes low and the rdda data has been acquired, the application must set mode high immediately. then, the microcontroller starts output by setting the rdcl signal low. the microcontroller rdcl output must start within 840 s (tms) after rdcl went low. in this case, if the last data read in master mode was data item n, then data starting with item n+1 will be written to memory. 3) timing of the switch from slave mode to master mode after all data has been read from memory and ready has gone high, the application must then wait until ready goes low once again the next time (timing a in the figure), immediately read out one bit of data and input the rdcl clock. then, at the point ready goes high, the microcontr oller must terminate rdcl output and then set mode low. the application must switch mode to low within 840 s (tms) after ready goes low (timing a in the figure). n n+1 n-1 n-2 m m+1 m+2 timing a t ms t sm input output input output input output rdcl (microcontroller status) rdcl (ic status) rdcl mode ready rdda undefined ?
LC72725KVS no.a1744-9/9 sample application connection circ uit (for master mode operation) note: if the rst pin is unused, it must be connected to ground. ps this catalog provides information as of june, 2010. specifications and information herein are subject to change without notice. sanyo semiconductor co.,ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated v alues (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all sanyo semiconductor co.,ltd. products described or contained herein. sanyo semiconductor co.,ltd. strives to supply high-qua lity high-reliability products, however, any and all semiconductor products fail or malfunction with some probab ility. it is possible that these probabilistic failures or malfunction could give rise to accident s or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damage to other property. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of sanyo semiconductor co.,ltd. or any third party. sanyo semiconductor co.,ltd. shall not be liable for any claim or suits with regard to a third party's intellectual property rights which has resulted from the us e of the technical information and products mentioned above. information (including circuit diagrams and circuit par ameters) herein is for example only; it is not guaranteed for volume production. any and all information described or contained he rein are subject to change without notice due to product/technology improvement, etc. when designing equip ment, refer to the "delivery specification" for the sanyo semiconductor co.,ltd. product that you intend to use. in the event that any or all sanyo semiconductor co.,ltd. products described or contained herein are controlled under any of applicable local export control l aws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of sanyo semiconductor co.,ltd. xout test v ss d 1 2 16 15 14 rdcl rst 13 9 xin mode rst rdcl rdsid/ready 4.332mhz v ss d 22pf v ss d 22pf cin flout v ss a v ss a v dd a v dd a 8 7 6 5 4 + 3 10 f v ss a mpxin mpxin 560pf 0.1 f 330pf vref v ss d v dd d 12 11 v ss d 0.1 f v dd d v dd d 10k rdsid/ready rdda rdda 10
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