1/4 rev. b structure : silicon monolithic integrated circuit product : 3 dual operational ampl ifier with switch for car audi o systems type : BA3131FS function : 1. high gain and lo w distortion. (gv = 110db, thd = 0.0015% typ.) 2. low noise. (vn = 2 ? vrms typ.) 3. switching circuit can be directly coupled to microcomputer p ort. 4. small switching noise. 5. equipped with 1/2 vcc output c ircuit for single power supply . absolute maximum ratings (ta=25) parameter symbol rating unit power supply voltage vcc 18.0 v power dissipation pd 750* mw operating temperature topr 4085 storage temperature tastg 55125 common-mode input voltage vi 3vcc v differential input voltage vid vcc v load current iomax. 50.0 ma this value decreases 7.5 mw/ for ta=25 or more. (when mounted on a glas s epoxy board (90mm ? 50mm ? 1.6t)) operating voltage range (ta=25) parameter symbol min. typ. max. unit conditions power supply voltage vcc 6.0 8.0 16.0 v single power source application example note that rohm cannot provide adequate confirmation of patents. the product described in this specification is designed to be u sed with ordinary electronic equipment or devices (such as audi o-visual equipment, office-automation equipment, communications devices, electrical appliances, and electronic toys). should you intend to use this pro duct with equipment or devices which require an extremely high level of reliability and the m alfunction of which would directly endanger human life (such as medical instr uments, transportation equipment, aerospace machinery, nuclear- reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance.
2/4 rev. b electrical characteristics unless otherwise noted, ta=25, vcc=8v parameter symbol limit unit conditions min. typ. max. quiescent current iq 2.0 4.9 7.8 ma v in 0,rl=,sw pin open input offset voltage vio 0.5 5.0 mv rsQ10k input offset current iio 5 200 na input bias current ib 50 500 na 1 high-amplitude voltage gain avol 86 110 db rlR2k?vo=1.5v common-mode input voltage vicm 3 6 v in-phase signal rejection ratio cmrr 60 72 db rsQ10k power supply voltage rejection ratio psrr 76 90 db rsQ10k maximum output voltage v oh /v ol 3 6 v rlR10k 3 6 v rlR2k input conversion noise voltage vn 2.0 4.0 vrms 2 reference voltage change v ref 10 mv ioref=1ma 0. 1 because the first stage is con figured with pnp transistors, i nput bias current is from the ic. 0. 2 tested under the following cond itions: gv = 40db, rs = 2k?, m atsushita tsuko vp-9690a (using din audio filter) design guaranteed values unless otherwise noted, ta=25, vcc=8v parameter symbol limit unit conditions min. typ. max. slew rate sr 0.5 1.2 v/s gv0db,rl=2k gainbandwidth product gbw 1.5 2.6 mhz f10khz crosstalk between a, b and c ct abc 60 73 db f1khz total harmonic distortion thd 0.0025 0.01 gv0dbf1khz vo1vrms channel separation cs 90 115 db f1khz,input conversion this item is not guaran teed during processes. outline dimension ssop-a20 unitmm ba 3 1 3 1f s lot no.
3/4 rev. b block diagram terminal number/ termin al name application example (1) numbers and data in entries are representative design value s and are not guaranteed values of the items. (2)although we are confident in recommending the sample applica tion circuits, carefully check their characteristics further when using them. when modifying extern ally attached component constants before use, determine them so that they have sufficient margins by tak ing into account variations in externally attached components and the rohm lsi, not only for static chara cteristics but also including transient characteristics. (3) absolute maximum ratings if applied voltage, operating temperature range, or other absol ute maximum ratings are exceeded, the lsi may be damaged. do not apply voltages or temperatures that exc eed the absolute maximum ratings. if you think of a case in which absolute maximum ratings are excee ded, enforce fuses or other physical safety measures and investigate how not to apply the conditions under which absolute maximum ratings are exceeded to the lsi. (4) gnd potential make the gnd pin voltage such that it is the lowest voltage eve n when operating below it. actually confirm that the voltage of each pin does not become a lower voltage th an the gnd pin, including transient phenomena. (5) thermal design perform thermal design in which there are adequate margins by t aking into account the allowable power dissipation in actual states of use. terminal number terminal name 1 +in1a 2 -in1a 3 +in1b 4 -in1b 5 +in1c 6 -in1c 7 out1 8 sw1 9 sw2 10 gnd 11 vcc 12 1/2 vcc 13 vref out 14 out2 15 -in2c 16 +in2c 17 -in2b 18 +in2b 19 -in2a 20 +in2a
4/4 rev. b (6) shorts between pins and misinstallation when mounting the lsi on a board, pay adequate attention to ori entation and placement discrepancies of the lsi. if it is misinstalled and the power is turned on, the lsi may be damaged. it also may be damaged if it is shorted by a foreign substance coming between pins of the ls i or between a pin and a power supply or a pin and a gnd. (7) operation in strong magnetic fields adequately evaluate use in a strong magnetic field, since there is a possibility of malfunction. (8) the 13 pin is the reference ou tput terminal, which outputs 1/2 vcc. determine the bypass condenser value in accordance with the desired characteristics. in addition, as the value may oscillate within the 500pf- 1 ? f, make sure to set the bypass condenser value of more than 10 ? f for alternate grounding. further, as 12 pin is located in the reference circuit, make sure to use bypass conde nser for ac grounding for reference output. (recommended value22 ? f) ? reference data (these values are intended only as a reference, and performance is not guaranteed) 12 pin bypass capacitor ? f ripple rejection fin=100hzdb output startup time 10 35 150 22 42 300 47 48 550 measuring condition: with power voltage on (vcc=8v), vcc path control, 13 pin path control100 ? f, the time which is 90% of equilibrium output voltage (9) this ic can be stably used in the low grain range (0-2db). it m ay oscillate at the capacity load of more than 200pf. [the phase margin 10typ.ta=85, 0db pointfor capacity 200pf] therefore, caution is required for using capacity load. in addition, for using 0db buffer, inserting bias resister of k to minus input will enable stable use against the capacity load. (10) truth value table h when the applied at pins8 and 9 is 2.0v or more, and l w hen it is 1.0v or less. ch1 ch2 ch3 off conditions sw18pin h h l l correspons to ? com output sw29pin h l h l
r1120 a www.rohm.com ? 2011 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specified herein is subject to change for improvement without notice. the content specified herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specifications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specified in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specified herein is intended only to show the typical functions of and examples of application circuits for the produc ts. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specified in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any product, such as derating, redundancy, fire control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specified herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.
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