ROHM BD37541FS handbook
Contents
1. 1dB step Possible to use Advanced switch for prevention of switching noise Mixing Monaural input Electrical Characteristic Unless specified particularly Ta 25 C VCC 8 5V f 1kHz Vin 1Vrms Rg 600 2 RL 10k 2 A input Input gain OdB Mute OFF Volume OdB Tone control OdB Loudness OdB Fader OdB Mixing OFF Item Condition Current upon no signal Common mode rejection ratio D E No signal Gv 20log VOUT VIN CB GV1 GV2 VOUT 1Vrms BW 400 30KHz VOUT 1Vrms BW 400 30KHz Rg 02 BW IHF A Rg 02 BW IHF A Fader codB Rg 0 2 BW IHF A Rg 0 CTC 20log VOUT VIN BW IHF A f 100Hz VRR 100mVrms RR 20log VOUT VCCIN XP1 and XN input XP2 and XN input CMRR 20log VIN VOUT BW IHF A XX D E VIM at THD N VOUT 1 BW 400 30kHz Volume 15dB VIN 100mVrms Gv 20log VOUT VIN Volume eodB Gf 20log VOUT VIN BW IHF A THD N 1 BW 400 30kHz uVrms uVrms uVrms Vrms Vrms REV A ROHM SEMICONDUCTOR 13 640 2 Max13 95 include BURR Dimensional outline drawing F O 15 0 1 SSOP A32 UNIT mm Block Diagram Descriptions of terminal Terminal Name PC BUS LOGIC Loudness 3 Band P EQ Tone control Input selector 3 single end and 2 stereo ISO ISO amp 150 amp REV A 3 4 ROHM SEMICONDUCTOR 4 4 Cautions on use 1 Absolute maximum ratings If applied voltage operating temperature range or other ab2. ROHM SEMICONDUCTOR 1 4 Structure Silicon Monolithic Integrated Circuit Product Sound Processor for car audio Type BDbD37541FS Package SSOP A32 Feature 1 Reduce switching noise of input gain control mute main volume fader volume bass middle treble loudness 11 by using advanced switch circuit Possible to control all steps Built in ground isolation amplifier inputs ideal for external stereo input Built in differential input selector that can make various combination of single ended differential input Built in input gain controller reduce switching noise for volume of a portable audio input Decrease the number of external components by built in 3 band equalizer filter And possible to control Q Gv fo of 3 band equalizer by C BUS control freely It is possible for the bass middle treble to the gain adjustment quantity of 20dqB and 1 dB step gain adjustment Itis equipped with output terminals of Subwoofer Moreover the stereo signal of the front and rear also can be output by the I C BUS control Built in mixing input Bi CMOS process is suitable for the design of low current and low energy And it provides more quality for small scale regulator and heat in a set Package is SSOP A32 Putting input terminals together and output terminals together can make PCB layout easier and can makes area of PCB smaller It is possible to control by 3 3V 5V for IC BUS Absolute Maximum Ratin
3. e 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 Products 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 n
4. gs Ta 25 C Symbol Power supply Voltage Power Dissipation Pd 950 KT mw X1 At Ta 25 C or higher this value is decreaced to 8 5mW C When Rohm standard board is mounted Rohm standard board Size 70 x 70 x 1 6 mm material FR4 glass epoxy substrate copper foil area not more than 3 Operating Range Symbol Power supply Voge vec 70 95 v 5 Design against radiation proof isn t made REV A ROHM SEMICONDUCTOR Function 2 4 Function Specifications Input selector Stereo 3 single end input and 2differential input possible to switch single end input Input gain O 20dB 1dB step Possible to use Advanced switch for prevention of switching noise Mute Possible to use Advanced switch for prevention of switching noise Volume 15dB 79dB 1dB step codB Possible to use Advanced switch for prevention of switching noise Bass 20 20dB 1dB step Q 0 5 1 1 5 2 fo 60 80 100 120Hz Possible to use advanced switch at changing gain Middle 20 20dB 1dB step Q 0 75 1 1 25 1 5 fo 500 1k 1 5k 2 5kHz Possible to use advanced switch at changing gain Treble 20 20dB 1dB step Q 0 75 1 25 fo 7 5k 10k 12 5k 15kHz Possible to use advanced switch at changing gain Fader OdB 79dB 1cB step codB Possible to use Advanced switch for prevention of switching noise Loudness OdB 20dB
5. ot 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
6. solute maximum ratings are exceeded the LSI may be damaged Do not apply voltages or temperatures that exceed the absolute maximum ratings If you think of a case in which absolute maximum ratings are exceeded 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 2 GND potential Make the GND pin voltage such that it is the lowest voltage even when operating below it Actually confirm that the voltage of each pin does not become a lower voltage than the GND pin including transient phenomena 3 Thermal design Perform thermal design in which there are adequate margins by taking into account the allowable power dissipation in actual states of use 4 Shorts between pins and misinstallation When mounting the LSI on a board pay adequate attention to orientation 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 LSI or between a pin and a power supply or a pin and a GND 5 Operation in strong magnetic fields Adequately evaluate use in a strong magnetic field since there is a possibility of malfunction REV A Notice 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 chang
7. under the Law Thank you for your accessing to ROHM product informations More detail product informations and catalogs are available please contact us ROHM ROHM Customer Support System SEMICONDUCTOR http www rohm com contact www rohm com 2010 ROHM Co Ltd All rights reserved R1010A
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ROHM BD37541FS handbook