Datasheet Sound Processors for Home Theater Systems 7.1ch Sound Processor for High-Quality Audio with Built-in Micro-step Volume BD34704KS2 General description Key Specifications The BD34704KS2 is an 8ch independent volume system Total harmonic distortion: 0.0004%(Typ) realized high-quality sound by improved specification of Maximum output voltage: 4.2Vrms(Typ) op-amp and optimized layout of the element.The system Output noise voltage: 1.2Vrms(Typ) is designed to allow 7.1ch surround system application. Residual output noise voltage: 1.0Vrms(Typ) Micro-step volume can reduce the switching pop noise Cross-talk between channels: -105dB(Typ) during volume attenuation, so a high quality audio Cross-talk between selectors: -105dB(Typ) system could be achieved. This IC is available 12ch single-end input selectors to Package W(Typ) x D(Typ) x H(Max) maximum 3 zones. And also available 2 system multi SQFP-T80C 16.00mm x 16.00mm x 1.60mm input selector. Features 12ch input selectors (It is extendable to up to 18 in case of no use other functions such as Multi input, REC output and SUB output) Micro-step volume can reduce the switching pop noise during volume attenuation Zone 3 is supported 2ch sub-volume for zone output that is available for independent control with a micro step function SQFP-T80C 2-wire serial bus control, corresponding to 3.3/5V Applications Suitable for the AV receivers, home theater systems, etc Typical Application Circuit Figure 1. Application Circuit Product structureSilicon monolithic integrated circuit This product is not designed protection against radioactive rays www .rohm.com TSZ02201-0C2C0E100210-1-2 2015 ROHM Co., Ltd. All rights reserved. 1/36 TSZ2211114001 2015.2.25 Rev.002DatasheetDatasheet BD34704KS2 Pin Configuration Figure 2. Pin Configuration www.rohm.com TSZ02201-0C2C0E100210-1-2 2015 ROHM Co., Ltd. All rights reserved. 2/36 TSZ2211115001 2015.2.25 Rev.002 DA 1 60 SBRIN CL 2 59 GND VCC 3 58 INL1 DGND 4 57 INR1 VEE1 5 56 INL2 N.C. 6 55 INR2 VEE2 7 54 INL3 OUTFL 8 53 INR3 N.C. 9 52 INL4 OUTFR 10 51 INR4 N.C. 11 50 INL5 OUTSW 12 49 INR5 N.C. 13 48 INL6 OUTC 14 47 INR6 OUTSL 15 46 INL7 OUTSR 16 45 INR7 OUTSBL 17 44 INL8 OUTSBR 18 43 INR8 OUTPL 19 42 INL9 OUTPR 20 41 INR9