Datasheet

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Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays

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TSZ02201-0C2C0E100210-1-2

© 2015 ROHM Co., Ltd. All rights reserved.

2015.2.25 Rev.002

www.rohm.com

TSZ22111・14・001

Sound Processors for Home Theater Systems

7.1ch Sound Processor for High-Quality Audio

with Built-in Micro-step Volume

BD34704KS2

General description

The BD34704KS2 is an 8ch independent volume system

realized high-quality sound by improved specification of

op-amp and optimized layout of the element.The system

is designed to allow 7.1ch surround system application.

Micro-step volume can reduce the switching pop noise

during volume attenuation, so a high quality audio

system could be achieved.

This IC is available 12ch single-end input selectors to

maximum 3 zones. And also available 2 system multi

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



2-wire serial bus control, corresponding to 3.3/5V

Applications



Suitable for the AV receivers, home theater systems,

etc

Key Specifications



Total harmonic distortion:

0.0004%(Typ)



Maximum output voltage:

4.2Vrms(Typ)



Output noise voltage:

1.2μVrms(Typ)



Residual output noise voltage:

1.0μVrms(Typ)



Cross-talk between channels:

-105dB(Typ)



Cross-talk between selectors:

-105dB(Typ)

Package

W(Typ) x D(Typ) x H(Max)

SQFP-T80C

16.00mm x 16.00mm x 1.60mm

SQFP-T80C

Typical Application Circuit

Figure 1. Application Circuit