BA3308F,BA3308FV : Audio ICs
Contents
1. 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand XR ER RE NR zw F Direction of feed 1pin Unit mm Order quantity needs to be multiple of the minimum quantity SSOP B14 Tape and Reel information Embossed carrier tape RRRRR 2500pos M E2 ia The direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 5 0 0 2 en 6 60 0 0 0 0 0 0 6 6 0 006 JSG Direction of feed Unit mm Order quantity needs to be multiple of the minimum quantity www rohm com 9 9 2012 06 Rev C 2011 ROHM Co Ltd All rights reserved Datasheet Notice Precaution on using ROHM Products 1 Our Products are designed and manufactured for application in ordinary electronic equipments such as AV equipment OA equipment telecommunication equipment home electronic appliances amusement equipment etc If you intend to use our Products in devices requiring extremely high reliability such as medical equipment Mee transport equipment traffic equipment aircraft spacecraft nuclear power controllers fuel controllers car equipment including car accessories safety devices etc and whose malfunction or failure may cause loss of human life b2. voltage below the GND at any time regardless of whether it is a transient signal or not Thermal design Perform thermal design in which there are adequate margins by taking into account the permissible dissipation Pd in actual states of use Short circuit between terminals and erroneous mounting Pay attention to the assembly direction of the ICs Wrong mounting direction or shorts between terminals GND or other components on the circuits can damage the IC Operation in strong magnetic fields Using the ICs in a strong electromagnetic field can cause operation malfunction The BA3308F FV has an on chip power supply mute circuit that checks for pop noise at power on This prevents the occurrence of pop noise by timing the charge times of the direct current cut capacitors C3 and C4 of 10pin and 11pin and of capacitor Ca for the ripple filter of 5pin Accordingly to obtain an adequate effect it is recommended that the constants of the application circuit be used in C3 C4 R3 R4 Cs and Ra 8 9 2012 06 Rev C 2011 ROHM Co Ltd All rights reserved BA3308F BA3308FV Technical Note GENGE Ordering part number SA Jeejee eee Part No Part No Package Packaging and forming specification F SOP14 E2 Embossed tape and reel FV SSOP B14 SOP14 lt Tape and Reel information gt MAX 3 05 include BURR Embossed carrier tape 14 A A A A A 8 Quantity 2500pcs T E2 misa The direction is the
3. 100 1k 100k FREQUENCY f Mhi VOLTAGE GAIN Gv dB Fig 4 Voltage gain vs frequency 120 100 Vout 300mWns f 1kHz Ri 10kQ 40 n5 o CLOSED LOOP VOLTAGE GAIN Gvc dB 950 25 0 25 50 75 100 AMBIENT TEMPERATURE Ta C Fig 7 Closed loop voltage gain vs ambient temperature OUTPUT VOLTAGE Vour dBV TOTAL HARMONIC DISTORTION THD INPUT VOLTAGE Vin dBV Fig 10 ALC characteristics 4 2 sU veerv im EL 1 4 amp 2 LUMI LETT 3 E A E os ter LL E ost TL soa M ETT AIT o2L LUMI FLT gi LIMIT I VII LOAD RESISTANCE Rt Q Fig 13 Maximum output voltage vs load resistance www rohm com 4 9 2012 06 Rev C 2011 ROHM Co Ltd All rights reserved BA3308F BA3308FV Technical Note Description of operations 1 Recording 1 Record amplifier BA3308 The BA3308F FV amplifier of chi and ch2 input stage 13pin 9pin can be direct coupled or use coupling capacitors C1 C2 The voltage gain of the record amplifier is determined by Gv R5 R3 The R5 R6 and C3 R3 regulate control of the pop noise that occurs at power on see Cautions on use and direct current bias fed back is set by R5 R6 and C5 C6 at the output stage INPUT OUTPUT Fig 14 2 ALC The BA3308F FV has an on chip signal rectifier and electronic volume needed for ALC The signal rectifier compares the direct a current output voltage that is sup
4. 6 SUPPLY VOLTAGE Vcc V Fig 2 Quiescent current vs power supply voltage 1 0 96 7V E LUI I a r0 2 NAB 1 1 1k 10k 100k FREQUENCY f Hz oooococoooco TOTAL HARMONIC DISTORTION THD ure e Fig 5 Total harmonic distortion vs frequency mii miim Vec 7V Gv 52dB SER R 10ko DIN AUDIO Ln EN m nmt EER T amA H it Odo 01 0 1 10 100 SIGNAL SOURCE RESISTANCE Rg kQ INPUT NOISE VOLTAGE Vuu 44 Vrms Fig 8 Input conversion noise voltage vs signal source resistance e L Gv 52dB R TOk Q OUTPUT VOLTAGE Vout V ms TOTAL HARMONIC DISTORTION THD 96 Oso 70 60 50 40 30 20 INPUT VOLTAGE Vu dBV Fig 11 1Input output characteristics QUIESCENT CURRENT la mA Oso 25 0 25 50 75 100 AMBIENT TEMPERATURE Ta C Fig 3 Quiescent current vs ambient temperature Rs Re 39kQ RsRe 6 8kQ 0 2 4 6 8 10 12 14 16 SUPPLY VOLTAGE Vcc V VOLTAGE GAIN Gv dB Fig 6 Voltage gain vs supply voltage 2 2 3 Ree 4 eG Ke e Q zZ o z amp o UM LEO UIN L4 14 A uJ N Lu a lt a o BAS UU TU ZA THE TERRE ETE CT BULL A A A 100k FREQUENCY f Hz Fig 9 Channel separation vs frequency 10 12 14 16 SUPPLY LEE Vcc V Fig 12 Maximum output voltage vs power supply voltage IN di AX T HL ELA Po EDUC HE LOL LL BAUR E UR E LUE TEE TRE TUE Qo
5. F 18kQ R4 390 Ce I 10pF L4 I R9 R10 C4777 TOOHF i R11 R12 120kO OUTPUT2 4 3kQ For playback connect the following NAB time constant circuit between ce tho pins 11 and 1 and pins 10 and 7 in place of R5 and R6 0 027UF Fig 18 www rohm com 7 9 2012 06 Rev C 2011 ROHM Co Ltd All rights reserved BA3308F BA3308FV Technical Note Notes for use 1 2 www rohm com Numbers and data in entries are representative design values and are not guaranteed values of the items 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 circuits may Cause variations in both static and transient characteristics for external components as well as this Rohm IC Allow for sufficient margins when determining circuit constants 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 regarding 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 GND potential Ensure a minimum GND pin potential in all operating conditions Make sure that no pins are at a
6. ROHM Technical Note SEMICONDUCTOR Audio Accessory ICs P Preamps with Built in ALC matee RoHS BA3308F BA3308FV No 11087ECTO1 GO Description The BA3308F FV is a dual preamplifier for recording and playback with ALC auto level control developed for stereo radio cassette recorders tape recorders and other pre amplifiers audio applications ALC circuit has a build in rectification circuit with wide adjustable dynamic range high gain low distortion amplifiers with direct coupling and mute circuit used to cut off pop noise during power on Available in SOP14 or SSOP B14 Packages QG Features Built in ALC rectification diode x 2 Wide operating power supply voltage range Vcc 4 5 14 V 3 Low current consumption lQ 3 5mA 4 High gain Gvo 80dB 5 Low distortion THD 0 1 6 Low noise VNIN21 Vrms 7 Input coupling capacitor not needed 8 Good ALC channel balance 9 Built in power supply mute circuit 10 Dynamic range of ALC can be changed by attaching input resistance Applications Stereo radio cassette tape recorders stereo cassette decks home stereos music centers etc OG Line up matrix BA3308F BA3308FV SOP14 SSOP B14 www rohm com l 1 9 2012 06 Rev C 2011 ROHM Co Ltd All rights reserved BA3308F BA3308FV Technical Note Absolute maximum ratings Ta 25 C Parameter Symbol Limits Unit Supply voltage Voc 16 V Power BA3308F 450 dis
7. applied in a short period of time such as pulse is applied confirmation of performance characteristics after on board mounting is strongly recommended Avoid applying power exceeding normal rated power exceeding the power rating under steady state loading condition may negatively affect product performance and reliability 7 De rate Power Dissipation Pd depending on Ambient temperature Ta When used in sealed area confirm the actual ambient temperature 8 Confirm that operation temperature is within the specified range described in the product specification 9 OHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in this document Precaution for Mounting Circuit board design 1 When a highly active halogenous chlorine bromine etc flux is used the residue of flux may negatively affect product performance and reliability 2 n principle the reflow soldering method must be used if flow soldering method is preferred please consult with the ROHM representative in advance For details please refer to ROHM Mounting specification Notice GE Rev 002 2014 ROHM Co Ltd All rights reserved Datasheet Precautions Regarding Application Examples and External Circuits 1 If change is made to the constant of an external circuit please allow a sufficient margin considering variations of the characteristics of the Products and external components including transien
8. at playback a time constant circuit is established in the NF section 1 11pin 7 10pin to obtain NAB characteristics The voltage gain at this time is determined by BA3308 the following formula Gv Rtt Re jwC Rg R3 Obtain the necessary gain by regulating the power on pop noise prevention NAB time constant circuit in the same way when regulating the gain at recording stage The operating o2 ll i point of the output stage 1 7pin is fixed at 3VF to F E i A i 0 027 u F 10u F Accordingly even if Vcc is raised to 5V or more as in the i m ur VMAX Vcc characteristic Fig 13 the maximum output voltage ESI Fig 16 OUTPUT does not rise above 1 2V Typ 4pin is grounded at playback since ALC is not needed For better signal to noise ratio characteristics at playback don t use R1 and R2 which are attached to the input pin 13pin 9pin rohm 2011 ROHM Co Ltd All rights reserved BA3308F BA3308FV Technical Note OG Measurement circuit SW6A Y f 10UF 1 p Vi 120k 1 390 V A 30k INPUT1 3 9k 4 SW3A lt VOU Q 22yF E mnm ES m 2200 SL 330yF 3 9k SW3B 30k INPUT2 Q 120k 1 10uF 2 390 n SW2B 1 3 O SW6B OUTPUT2 wo C2 Ww A5 2 SW1B Vi 10kO LL 100uF 2 2k Fig 17 Application circuit 9 OUTPUT C3 ZZ 100uF r7 R3 390 C5 10uF R5 C5 p A INPUT1 10uF R7 z VCC 7 iMQ TIT 2 2uF Re z 330uF C8 C2 2200 mm H INPUT2 o 10u
9. e Products are exposed to high Electrostatic 2 Even under ROHM recommended storage condition solderability of products out of recommended storage time period may be degraded It is strongly recommended to confirm solderability before using Products of which storage time is exceeding the recommended storage time period 3 Store transport cartons in the correct 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 ROHM s internal use only Precaution for Disposition When disposing Products please dispose them properly using an authorized industry waste company Precaution for Foreign Exchange and Foreign Trade act Since our Products might fall under controlled 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 foregoing information or data will not infringe any intellectual property rights or any other rig
10. erposed in the output stage 1 7pin me lt a m signal to the reference voltage 4 5Vr 3V 1VF is approximately ch1 ch 0 7V in the comparator circuit and if the output voltage is higher it gt gt D turns the comparator ON to charge the smoothing capacitor C7 Since the operation point of the output stage of amplifier ch1 and ch2 is fixed at 3VF the comparator turns ON when the peak value of the signal output voltage is 1 5VF effective value approx 0 75V Once the direct current signal for electronic volume is controlled ALC operation starts The electronic volume which is connected between the input line 13 9pin and GND causes the input signal to attenuate according to the ratio of the external resistance R1 R2 to the resistance value of the electronic volume The ALC range varies according to the values of R1 and R2 For small ALC variation the S N will determinate an adequate ALC range is obtained by applying several KQ of the Ri and R2 The attack time and recovery time of ALC are set according to C7 and R7 of 4pin If the time constants C7 R7 are large the recovery time will be long and as C7 becomes smaller and the attack time will be shorter 4 5Vr BA3308 Vout DC AC 1 7 4 13 9 Fig 15 www rohm com 5 9 2012 06 Rev C 2011 ROHM Co Ltd All rights reserved BA3308F BA3308FV Technical Note 2 On playback Since amplifier ch and ch2 are used as a NAB equalizer amplifier
11. hts 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 other damages arising from use of such information or data 2 Nolicense 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 whole 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 way whatsoever the Products and the related technical information contained in the Products or this document for any military purposes including 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 Notice GE Rev 002 2014 ROHM Co Ltd All rights reserved Datasheet General Precaution 1 Before you use our Products you are requested to care fully read this document and fully understand its contents ROHM shall not be in an y way responsible or liable for failure malfunction or accident arising from the use of a ny ROHM s Products against warning caut
12. ion or note contained in this document 2 All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior notice Before purchasing or using ROHM s 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 any damages expenses or losses incurred by you or third parties resulting from inaccuracy or errors of or concerning such information Notice WE Rev 001 2014 ROHM Co Ltd All rights reserved
13. nder 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 including 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 are exposed to sea wind or corrosive gases including Cl2 H2S NH3 SO2 and NO2 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 even 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 subject 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
14. odily injury or serious damage to property Specific Applications please consult with the ROHM sales 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 ROHM s Products for Specific Applications Note1 Medical Equipment Classification of the Specific Applications JAPAN CHINA CLASS IE CLASSI CLASS I b CLASSI CLASSIV CLASS I 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 design 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 conditions as exemplified below Accordingly ROHM shall not be in any way responsible or liable for any damages expenses or losses arising from the use of any ROHM s Products u
15. sipation BA3308FV 350 ns Operating temperature Topr 25 79 C Storage temperature Tstg 55 4 125 C Reduce by 4 5 mW C over 25 C when mounted on a 70mm x 70mm x 1 6mm PCB board Reduce by 3 5 mW C over 25 C G Operating conditions Ta 25 C Parameter Symbol Min Typ Max Unit Supply voltage Vcc 4 5 14 V Note This IC is not designed to be radiation resistant OG Electrical characteristics Unless otherwise noted Ta 25 C Vcc 7 0V f 1kHz BPF20 20kHz Open loop voltage gain G dB Vour 10dBV Fig 17 T 0 1 03 NAB34dB Vour 40m Vis Fig 17 V 1 2 V V 1 2 iVm A 45 2 5 E 08 45 EN Nc Tw Finputresistance Fw Maximum output volage Vou Input conversion noise voltage Rg 2 2kQ referenced to NAB 34dB Fia 17 hits at 1kHz Rg 3 9 KQO Vin 70 dBV standard THD 3 nigel dB Vin 600BV 30dBV Fig 17 dB Vo 0dBV NAB 34dB Fig 17 ALC channel balance AALC Channel separation CS 79 NE ER RN vO HD Rin OM NIN ALC range LC C CS M 2 9 2012 06 Rev C 2011 ROHM Co Ltd All rights reserved BA3308F BA3308FV Technical Note Block diagram BA3308F FV OUTPUT1 OUTPUT M 3 9 2012 06 Rev C 2011 ROHM Co Ltd All rights reserved Technical Note BA3308F BA3308FV OG Electrical characteristic curves Reference data QUIESCENT CURRENT le mA 0 2 4 6 8 10 12 14 1
16. t characteristics as well as static characteristics 2 You agree that application notes reference designs and associated data and information contained in this document are presented only as guidance for Products use Therefore 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 the Products maximum rating will not be applied to Products Please take special care under dry condition e g Grounding of human body equipment solder iron isolation from charged objects setting of lonizer friction prevention and temperature humidity control Precaution for Storage Transportation 1 Product performance and soldered connections may deteriorate if the Products are stored in the places where a the Products are exposed to sea winds or corrosive gases including CI2 H2S NH3 SO2 and NO2 b the temperature or humidity exceeds those recommended by ROHM c the Products are exposed to direct sunshine or condensation d th
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