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| 1/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. sound processors for home theater systems 6ch / 9ch stereo input selectors BD3843FS,bd3841fs description BD3843FS is a function switch ic with two 6ch (9ch for bd3841fs) inputs. it can independently control outputs of 2 systems: 2ch rec output (3ch for bd3841fs) and 1ch line output. therefor e, it is can be used for 2nd room entertainment and 2nd source recording. BD3843FS has excellent cross-talk characte ristics between channels and selectors. low distortion, and low noise are realized by a basic pattern layout. features 1) 2 room entertainment / 2 source recording. 2) 6ch volume lsi bd3813ks/bd3815ks can be controlled simultaneously by the serial control bus. 3) 7ch volume lsi bd3816k1, bd3817ks with BD3843FS can be controlled simultaneously by the serial control bus. 4) 14ch input is available by combining 2chips (BD3843FS and bd3841fs). 5) excellent cross-talk characteristics between channels by basic pattern layout. 6) built-in buffer amplifier. 7) 2-line serial control bus (for both 3.3v and 5v). 8) operated by single and dual power sources. applications av receivers, home theater system s, mini-audio systems, and tvs. product lineup parameter BD3843FS bd3841fs input selector 6 9 rec output 2 3 package ssop-a24 ssop-a32 absolute maximum ratings (ta=25 ) parameter symbol ratings unit power supply voltage vcc 7.5 *1 v vee -7.5 input signal voltage vin vcc+0.3 vee-0.3 v power dissipation pd 800 (BD3843FS) 950 (bd3841fs) *2 mw operating temperature topr 20 +75 storage temperature tastg 55 +125 *1 even in the specified range of power supply voltage, applying voltage only to the vcc side may cause an excessive current may ca use permanent damage to the ic. when starting up power supplies, vee and vcc should be powered on simultaneously, or vee first followed by vcc. *2 reduced by 8 mw/ over 25 (BD3843FS), when installed on the standard board (size: 70 x 70 x 1.6mm). reduced by 7.7 mw/ over 25 (bd3841fs), when installed on the standard board (size: 70 x 70 x 1.6mm). no.10081eat07 downloaded from: http:///
2/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. technical note BD3843FS,bd3841fs operating range must function normally at ta = 25 , part no. parameter symbol ratings unit min. typ. max. BD3843FS action power source voltage (both power sources) vcc 4 7 7.3 v vee -7.3 -7 -4 action power source voltage (single power source) vcc- vee 8 14 14.6 bd3841fs action power source voltage (both power sources) vcc 5 7 7.3 v vee -7.3 -7 -5 action power source voltage (single power source) vcc- vee 10 14 14.6 electrical characteristics ta = 2 5 , vcc=7v, vee=7v, f=1khz, vin=1vrms, rl=10k , rg=600 , unless otherwise noted. parameter symbol limits unit conditions min. typ. max. circuit current vcc iq D 3 10 ma no signal vee -10 -3 D output output voltage gain 1ch gv1 -2 0 2 db output voltage gain 2ch gv2 -2 0 2 db total harmonic distortion ratio 1ch thd1 D 0.004 0.05 % bw=400 30khz total harmonic distortion ratio 2ch thd2 D 0.004 0.05 % bw=400 30khz maximum output voltage 1ch vomax1 3.4 4.2 D vrms thd=1% maximum output voltage 2ch vomax2 3.4 4.2 D vrms thd=1% output noise voltage 1ch vno1 D 1 5 vrms rg=0 , bw=ihf-a output noise voltage 2ch vno2 D 1 5 vrms rg=0 , bw=ihf-a cross-talk between channels 1ch 2ch ctc12 D -95 -80 db rg=0 , bw=ihf-a cross-talk between channels 2ch 1ch ctc21 D -95 -80 db rg=0 , bw=ihf-a cross-talk between selectors 1ch cts1 D -95 -80 db rg=0 , bw=ihf-a cross-talk between selectors 2ch cts2 D -95 -80 db rg=0 , bw=ihf-a rec output r voltage gain 1ch gvr1 -2 0 2 db rl=47k ? , r voltage gain 2ch gvr2 -2 0 2 db rl=47k ? , r total harmonic distortion ratio 1ch thdr1 D 0.01 0.09 % rl=47k ? , bw=400 30khz r total harmonic distortion ratio 2ch thdr2 D 0.01 0.09 % rl=47k ? , bw=400 30khz r output noise voltage 1ch vnor1 D 1 5 vms rg=0 , bw=ihf-a r output noise voltage 2ch vnor2 D 1 5 vms rg=0 , bw=ihf-a r output impedance 1ch routr1 D 50 100 ? r output impedance 2ch routr2 D 50 100 ? * note: this ic is not designed to be radiation-resistant. downloaded from: http:/// 3/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. technical note BD3843FS,bd3841fs timing chart 1. signal timing standards ? data is read at the rise of clock. ? latch is read at the fall of clock. ? end latch signal at low. * to avoid malfunctions, clock and data signals must terminate with the low state. 1byte=17bit fig.1 parameter symbol limit unit min. typ. max. minimum clock width twc 2.0 s minimum data width twd 2.0 s minimum latch width twl 2.0 s low hold width twh 2.0 s data setup time (data clk) tsd 1.0 s data hold time (clk data) thd 1.0 s latch setup time (clk latch) tsl 1.0 s latch hold time (data latch) thl 1.0 s latch low setup time ts 1.0 s latch low hold time th 1.0 s 2. voltage standards of control signal parameter conditions limits unit min. typ. max.( Q vcc) h input voltage vcc=5 7.3v vee=-5 -7.3v 2.2 5.5 v l input voltage 0 1.0 v w w w w w a w downloaded from: http:/// 4/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. technical note BD3843FS,bd3841fs 3. control data format list (1) BD3843FS control data format data input direction msb lsb data d16 d15 d14 d13 d12 d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 input function 1 input function 2 reca0:off 1:on recb0:off 1:on * 0 0 0 select address (2) bd3841fs control data format data input direction msb lsb data d16 d15 d14 d13 d12 d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 input function 1 input function 2 reca0:off 1:on recb0:off 1:on recc0:off 1:on * * * 1 0 1 *:dont care. (ex.) data input direction msb lsb data l "l" represents latch. downloaded from: http:/// 5/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. technical note BD3843FS,bd3841fs block diagram, application circuit 1)BD3843FS) (both power sources) fig.2 2)bd3841fs (both power sources) fig.3 unit resistance capacitor f * f-sw1 input function1 f-sw2 input function2 30 29 31 32 24 23 25 26 27 28 18 17 19 20 21 22 15 16 14 13 12 11 10 9 8 7 6 5 4 3 2 1 logic 10k ? 10k ? 47 47 47k 47k 47k 47k 47k 47k 47k cl 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k da v ee v cc reca1 reca2 recb1 recb2 recc1 recc2 out1 out2 ini1 ini2 ina1 ina2 inb1 inb2 inc1 inc2 ind1 ind2 ine1 ine2 inf1 inf2 ing1 ing2 inh1 inh2 47k f- s w1 f-sw2 - - downloaded from: http:/// 6/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. technical note BD3843FS,bd3841fs 3)BD3843FS (single power source) fig.4 4)bd3841fs (single power source) fig.5 * f-sw1 input function1 f-sw2 input function2 - - 30 29 31 32 24 23 25 26 27 28 18 17 19 20 21 22 15 16 14 13 12 11 10 9 8 7 6 5 4 3 2 1 10k ? logic 10k ? 47 47k 47k 47k 47k 47k 47k 47k cl 47 k 47k 47 k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k da 1/2v cc v cc reca1 reca 2 recb1 recb2 recc1 recc2 out1 out2 ini1 ini2 ina1 ina2 inb1 inb2 inc1 inc2 ind1 in d2 ine1 ine2 inf1 inf2 ing1 ing2 inh1 inh2 47k 47k 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 47k 10 10 10 10 10 10 10 10 10 10 f-sw1 f-sw2 unit resistance ? capacitor f resistance ? downloaded from: http:/// 7/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. technical note BD3843FS,bd3841fs -5 -4 -3 -2 -1 0 1 2 3 4 5 024681 0 vcc,vee (v) circuit current (ma) 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 input voltage (vrms) output voltage (vrms) 0.0001 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 + % - - yz 0.0 1.0 2.0 3.0 4.0 5.0 024681 0 vcc,vee (v) noise ( vrms) 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 input voltage (vrms) output voltage (vrms) 0.0001 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 input voltage (vrms) thd+n (%) -2 -1 0 1 2 10 100 1000 10000 100000 frequency (hz) gain (db) 0.0 1.0 2.0 3.0 4.0 5.0 024681 0 vcc,vee(v) noise( vrms) reference data fig.6 circuit current - supply voltage fig.7 output voltage - input voltage fig.8 total harmonic distortion - input voltage fig.9 voltage gain - frequency fig.10 output noise voltage C supply voltage fig.11 rec output voltage - input voltage fig.12 rec total harmonic distortion - input voltage fig.13 rec voltage gain - frequency fig.14 rec output noise - supply voltage vcc vee downloaded from: http:/// 8/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. technical note BD3843FS,bd3841fs notes for use 1. numbers and data in entries are representative design values and are not guaranteed values of the items. 2. although rohm is confident that the example application circuit reflects the best possible recommendations, be sure to verify circuit characteristics for your particular application. modification of constants for other externally connected circui ts may cause variations in both static and trans ient characteristics for external compo nents as well as this rohm ic. allow for sufficient margins when determining circuit constants. 3. absolute maximum ratings use of the ic in excess of absolute maximum ratings, such as the applied voltage or operating temperature range (topr), may result in ic damage. assumptions should not be made r egarding the state of the ic (short mode or open mode) when such damage is suffered. a physical safety measure, such as a fuse, should be implemented when using the ic at times where the absolute maximum ratings may be exceeded. 4. vee potential make the vee pin voltage such that it is the lowest volt age even when operating below it. actually confirm that the voltage of each pin does not become a lower volt age than the vee pin, including transient phenomena. 5. thermal design perform thermal design, in which there are adequate margins, by taking into account the power dissipation (pd) in actual states of use. 6. short circuit between terminals and erroneous mounting pay attention to the assembly direction of the ics. wrong m ounting direction or shorts betw een terminals, gnd, or other components on the circuits, can damage the ic. 7. operation in strong electromagnetic field using the ics in a strong electromagnetic field can cause operation malfunction. 8. operating voltage range and operating temperature range circuit function actions are gu aranteed within the action voltage range and the action temperature range. however, the specific values of the electrical c haracteristics are guaranteed under the s pecified conditions of the electrical characteristics. therefore, carry out set considerations in sufficient considerati on of ic characteristic fluctuations.. 9. power on/off (a) at power on/off, a shock sound will be g enerated. therefore, use mute on the set. (b) when turning on power supplies, vee and vcc should be powered on simultaneously, or vee first followed by vcc. if the vcc side is started up first, an excessive current may flow from vcc to vee. 10. serial control for the cl and da terminals, the patterned and other wirings should be routed as not to cause interference with the analog-signal-related lines. 11. function switching for all functions, other than master volume, treble, and bass gain settings, use mute on the set. downloaded from: http:/// 9/9 www.rohm.com 2010.06 - rev . a ? 2010 rohm co., ltd. all rights reserved. technical note BD3843FS,bd3841fs ord e ri ng p a rt num be r b d 3 8 4 3 f s - e 2 part no. part no. 3843 3841 package fs: ssop-a24 ssop-a32 packaging and forming specification none: tray ? order quantity needs to be multiple of the minimum quantity. datasheet d a t a s h e e t notice - ge rev.002 ? 2014 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our products are designed and manufac tured for application in ordinary elec tronic equipments (such as av equipment, oa equipment, telecommunication equipment, home electroni c appliances, amusement equipment, etc.). if you intend to use our products in devices requiring ex tremely high reliability (such as medical equipment (note 1) , transport equipment, traffic equipment, aircraft/spacecra ft, nuclear power controllers, fuel c ontrollers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (specific applications), please consult with the rohm sale s representative in advance. unless otherwise agreed in writing by rohm in advance, rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ro hms products for specific applications. (note1) medical equipment classification of the specific applications japan usa eu china class class class b class class class 2. rohm designs and manufactures its products subject to strict quality control system. however, semiconductor products can fail or malfunction at a certain rate. please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe desi gn against the physical injury, damage to any property, which a failure or malfunction of our products may cause. the following are examples of safety measures: [a] installation of protection circuits or other protective devices to improve system safety [b] installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. our products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditio ns, as exemplified below. accordin gly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of an y rohms products under any special or extraordinary environments or conditions. if you intend to use our products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] use of our products in any types of liquid, incl uding water, oils, chemicals, and organic solvents [b] use of our products outdoors or in places where the products are exposed to direct sunlight or dust [c] use of our products in places where the products ar e exposed to sea wind or corrosive gases, including cl 2 , h 2 s, nh 3 , so 2 , and no 2 [d] use of our products in places where the products are exposed to static electricity or electromagnetic waves [e] use of our products in proximity to heat-producing components, plastic cords, or other flammable items [f] sealing or coating our products with resin or other coating materials [g] use of our products without cleaning residue of flux (ev en if you use no-clean type fluxes, cleaning residue of flux is recommended); or washing our products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] use of the products in places subject to dew condensation 4. the products are not subjec t to radiation-proof design. 5. please verify and confirm characteristics of the final or mounted products in using the products. 6. in particular, if a transient load (a large amount of load applied in a short per iod of time, such as pulse. is applied, confirmation of performance characteristics after on-boar d mounting is strongly recomm ended. avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading c ondition may negatively affect product performance and reliability. 7. de-rate power dissipation (pd) depending on ambient temper ature (ta). when used in seal ed area, confirm the actual ambient temperature. 8. confirm that operation temperat ure is within the specified range described in the product specification. 9. rohm shall not be in any way responsible or liable for fa ilure induced under deviant condi tion from what is defined in this document. precaution for mounting / circuit board design 1. when a highly active halogenous (chlori ne, bromine, etc.) flux is used, the resi due of flux may negatively affect product performance and reliability. 2. in principle, the reflow soldering method must be used; if flow soldering met hod is preferred, please consult with the rohm representative in advance. for details, please refer to rohm mounting specification downloaded from: http:/// datasheet d a t a s h e e t notice - ge rev.002 ? 2014 rohm co., ltd. all rights reserved. precautions regarding application examples and external circuits 1. if change is made to the constant of an external circuit, pl ease allow a sufficient margin considering variations of the characteristics of the products and external components, including transient characteri stics, as well as static characteristics. 2. you agree that application notes, re ference designs, and associated data and in formation contained in this document are presented only as guidance for products use. theref ore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in this document. rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. precaution for electrostatic this product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. please take proper caution in your manufacturing process and storage so that voltage exceeding t he products maximum rating will not be applied to products. please take special care under dry condit ion (e.g. grounding of human body / equipment / solder iron, isolation from charged objects, se tting of ionizer, friction prevention and temperature / humidity control). precaution for storage / transportation 1. product performance and soldered connections may deteriora te if the products are stor ed in the places where: [a] the products are exposed to sea winds or corros ive gases, including cl2, h2s, nh3, so2, and no2 [b] the temperature or humidity exceeds those recommended by rohm [c] the products are exposed to di rect sunshine or condensation [d] the products are exposed to high electrostatic 2. even under rohm recommended storage c ondition, solderability of products out of recommended storage time period may be degraded. it is strongly recommended to confirm sol derability before using products of which storage time is exceeding the recommended storage time period. 3. store / transport cartons in the co rrect direction, which is indicated on a carton with a symbol. otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. use products within the specified time after opening a humidity barrier bag. baking is required before using products of which storage time is exceeding the recommended storage time period. precaution for product label qr code printed on rohm products label is for rohms internal use only. precaution for disposition when disposing products please dispose them proper ly using an authorized industry waste company. precaution for foreign exchange and foreign trade act since our products might fall under cont rolled goods prescribed by the applicable foreign exchange and foreign trade act, please consult with rohm representative in case of export. precaution regarding intellectual property rights 1. all information and data including but not limited to application example contained in this document is for reference only. rohm does not warrant that foregoi ng information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. rohm shall not be in any way responsible or liable for infringement of any intellectual property rights or ot her damages arising from use of such information or data.: 2. no license, expressly or implied, is granted hereby under any intellectual property rights or other rights of rohm or any third parties with respect to the information contained in this document. other precaution 1. this document may not be reprinted or reproduced, in whol e or in part, without prior written consent of rohm. 2. the products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. in no event shall you use in any wa y whatsoever the products and the related technical information contained in the products or this document for any military purposes, incl uding but not limited to, the development of mass-destruction weapons. 4. the proper names of companies or products described in this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties. downloaded from: http:/// datasheet datasheet notice C we rev.001 ? 2014 rohm co., ltd. all rights reserved. general precaution 1. before you use our pro ducts, you are requested to care fully read this document and fully understand its contents. rohm shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny rohms products against warning, caution or note contained in this document. 2. all information contained in this docume nt is current as of the issuing date and subj ec t to change without any prior notice. before purchasing or using rohms products, please confirm the la test information with a rohm sale s representative. 3. the information contained in this doc ument is provi ded on an as is basis and rohm does not warrant that all information contained in this document is accurate an d/or error-free. rohm shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information. downloaded from: http:/// |
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