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product structure silicon monolithic integrated circuit this product has no designed protection against radioactive rays 1/ 12 tsz02201 - 0c2c0ez00400 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 13.nov.2015 rev.001 tsz 22111 ? 14 ? 001 www.rohm.com ground isolation amplifier b a3123f general description BA3123F is a ground isolation amplifier developed for car audio applications. this ic efficiently eliminates problems caused by wiring resistance and removes noise generated by other electrical devi ces used in automobiles. the external capacitor values required for this ic are so small that it allow s for compact and reliable set design. features large c apacitors not r equired high c ommon -m ode r ejection r atio low n oise low d istortion two c hannels ap plications car audio systems key specifications ? power supply voltage range : 4 v to 1 8v ? quiescent current : 9.0ma ( typ ) ? high common - mode rejection ratio (1khz): 57db( typ ) ? low noise : v no = 3. 5v rms( typ ) ? low distortion : thd = 0.002%( typ ) ? o peration temperature range : -40 c to +85 c package w (typ) x d(typ) x h(max) typical application circuit so p 8 5.00 mm x 6. 2 0mm x 1. 71 mm datashee t datashee t
BA3123F 2 / 12 tsz02201 - 0c2c0ez00400 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 13.nov.2015 rev.001 www.rohm.com tsz22111 15 001 block diagram and pin configurat ion absolute maximum ratings (ta = 25 c ) parameter symbol limit unit power supply voltage v cc 18 v power dissipation pd 0. 45 (note 1) w operation temperature topr - 40 to + 85 c storage temperature tstg - 55 to + 125 c (note 1) reduced by 4.5mw in ta of 1 c over 25 c . caution: operating the ic over the absolute maximum ratings may damage the ic. the damage can either be a short circuit between pins o r an open circuit between pins and the internal circuitry. therefore, it is impo rtant to consider circuit protection measures, such as adding a fuse, in case the ic is operated over the absolute maximum ratings . recommended operating condition s ( ta=25 c) parameter symbol min typ max unit power supply voltage v cc 4 12 18 v electr ical characteristics ( unless otherwise noted, ta = 25 ? min typ max unit conditions quiescent current i q 5.6 9.0 14.0 ma v in vrms 8k v/s
BA3123F 3 / 12 tsz02201 - 0c2c0ez00400 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 13.nov.2015 rev.001 www.rohm.com tsz22111 15 001 typical performance curves figure 4. voltage gain vs power supply voltage power supply voltage : v cc (v) voltage gain : g v (db) figure 1. quiescent current vs power supply voltage power supply voltage : v cc (v) quiescent current : i q (ma) v in = 0vrms figure 2. maximum output voltage vs power supply voltage power supply voltage : v cc (v) maximum output voltage : v om (vrms) thd=0.1% r l = 10k
BA3123F 4 / 12 tsz02201 - 0c2c0ez00400 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 13.nov.2015 rev.001 www.rohm.com tsz22111 15 001 typical performance curves C =10k rg=1.8k/open =10k rg=0 =10k
BA3123F 5 / 12 tsz02201 - 0c2c0ez00400 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 13.nov.2015 rev.001 www.rohm.com tsz22111 15 001 typical performance curves C =10k rg=1.8k rg=1.8k
BA3123F 6 / 12 tsz02201 - 0c2c0ez00400 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 13.nov.2015 rev.001 www.rohm.com tsz22111 15 001 measurement circuits figure 12 BA3123F
BA3123F 7 / 12 tsz02201 - 0c2c0ez00400 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 13.nov.2015 rev.001 www.rohm.com tsz22111 15 001 application information 1. circuit operation figure 1 3 . flow of noise in car audio systems car audio systems are grounded to the c ar body. for this reason, electrical noise generated by the car electrical system can enter the power amplifier input through the chassis and become audible. ba312 3f utilizes the common - mode rejection characteristics of an operational amplifier to elimi nate this noise. without BA3123F noise enters the power amplifier input s directly . with BA3123F, the cmrr of operational amplifiers 1 - a and 2 - a eliminates the noise. principle of noise elimination: to obtain the output voltage (e o ) figure 1 4 . the principle of noise rejection with BA3123F, the elimination level of the noise is expressed as: cmrr = 20log (e o /e i )(e i = e 1 = e 2 ) therefore, cmrr ? ? i o i v r r r e r r e e r r r v ? ? ? ? ? ? ? ? 1 2 1 1 1 2 2 4 3 4 ? ? 2 4 3 1 3 2 4 1 2 1 1 2 2 4 3 4 1 2 1 1 1 2 ) ( - - - ) ( - e r r r r r r r e e r r e r r r r r r e r r e o ? ? ? ? ? ? ? ? ? ? ?
BA3123F 8 / 12 tsz02201 - 0c2c0ez00400 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 13.nov.2015 rev.001 www.rohm.com tsz22111 15 001 operational notes 1. reverse c onnection of p ower s upply connecting the power supply in reverse polarity can damage the ic. take pr ecautions against reverse polarity when connecting the power supply , such as mounting an external diode between the power supply and the ic subject the ic to stress. always discharge capacitors completely after each process or step. the ics power supply
BA3123F 9 / 12 tsz02201 - 0c2c0ez00400 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 13.nov.2015 rev.001 www.rohm.com tsz22111 15 001 operational notes C n n p + p n n p + p s u b s t r a t e g n d n p + n n p + n p p s u b s t r a t e g n d g n d p a r a s i t i c e l e m e n t s p i n a p i n a p i n b p i n b b c e p a r a s i t i c e l e m e n t s g n d p a r a s i t i c e l e m e n t s c b e t r a n s i s t o r ( n p n ) r e s i s t o r n r e g i o n c l o s e - b y p a r a s i t i c e l e m e n t s
BA3123F 10 / 12 tsz02201 - 0c2c0ez00400 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 13.nov.2015 rev.001 www.rohm.com tsz22111 15 001 ordering information b a 3 1 2 3 f - e 2 part number package f : sop 8 packaging and forming specification e2: embossed tape and reel marking diagram sop8 (top view) 3123 part number marking lot number 1pin mark
BA3123F 11 / 12 tsz02201 - 0c2c0ez00400 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 13.nov.2015 rev.001 www.rohm.com tsz22111 15 001 physical dimension , tape and reel information package name sop8 (unit : mm) pkg : sop8 drawing no. : ex112 - 5001 - 1 (max 5.35 (include.burr))
BA3123F 12 / 12 tsz02201 - 0c2c0ez00400 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 13.nov.2015 rev.001 www.rohm.com tsz22111 15 001 revision history date revision changes 13.nov .2015 001 new release
datasheet d a t a s h e e t notice-pga-e rev.00 2 ? 2015 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, ro hm 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 hm?s 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 rohm?s 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 bel ow), 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 depending on ambient temperatur e. when used in sealed area, c onfirm that it is the use in the range that does not exceed t he maximum junction temperature. 8. confirm that operation temperat ure is within the specified range descr ibed 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 us ed on a surface-mount products, the flow soldering method must be used on a through hole mount products. if the flow sol dering method is preferred on a surface-mount products, please consult with the rohm representative in advance. for details, please refer to rohm mounting specification
datasheet d a t a s h e e t notice-pga-e rev.00 2 ? 2015 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 c onsidering 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 indepen dent 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 hum idity 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 rohm?s 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 concerned goods might be fallen under listed items of export control prescribed by foreign exchange and foreign trade act, please consult with rohm in case of export. precaution regarding intellectual property rights 1. all information and data including but not limited to application example contain ed 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. 2. rohm shall not have any obligations where the claims, actions or demands arising from the co mbination of the products with other articles such as components, circui ts, systems or external equipment (including software). 3. 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 products or the informati on contained in this document. pr ovided, however, that rohm will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to manufacture or sell products containing the produc ts, subject to the terms and conditions herein. 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.
datasheet datasheet notice ? we rev.001 ? 2015 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.
datasheet part number BA3123F package sop8 unit quantity 2500 minimum package quantity 2500 packing type taping constitution materials list inquiry rohs yes BA3123F - web page distribution inventory

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