ROHM BD3811K1 Data Sheet
Summary
Elevate your home theater experience with these sophisticated 5.1 channel sound processors. Featuring advanced, integrated functionality for precise volume control across six channels, tone equalization (Bass/Treble), mixing, and dynamic signal boosting. This technical manual provides detailed specifications on power requirements, noise performance, and operational parameters necessary for seamless system integration. Designed for use in AV receivers, mini-audio systems, and high-end home theater setups by professional electronics manufacturers.
Page 1 Text Content
Sound Processors for Home Theater Systems
5.1ch Sound Processor
No.10081EAT02
BD3811K1,BD3818KS
●Description BD3811K1 and BD3818KS are 5.1ch sound processors, with built-in Mode Selector/Input Selector. Functions, including 6-ch Volume, Gain Amp, Bass, Treble, Mixing (BD3818KS), Dynamic Bass Boost (BD3818KS) and Bass Boost (BD3811K1) are integrated into a single chip.
●Features 1) Independent 6 channels for Master Volume (0 to -103d B, 1d B/Step, MUTE, BD3811K1) (0 to -95d B 1d B/Step, MUTE, BD3818KS) Implementation of a resistance ladder type circuit reduces residual noise and a shock sound at switching. 2) Low current consumption design achieved by adopting the Bi CMOS process 3) Maximum output voltage (BD3818KS): 4.3Vrms (Vcc=7V, VEE=-7V, RL=10kΩ) Maximum output voltage (BD3811K1): 4.2Vrms (Vcc=7V, VEE=-7V, RL=10kΩ) 4) Built-in Input Gain Amp useful for adjusting the output signal voltages 5) Built-in Operational Amplifier useful for filter construction (BD3818KS) 6) Built-in Dynamic Bass Boost circuit (BD3818KS) 7) 2-wire serial control (BD3818KS for 5V, BD3811K1 for both 3.3V and 5V) 8) Built-in Output Gain Amp useful for adjusting the output signal voltages (BD3811K1) 9) REC output terminal with a REC input/output switch useful for monitoring Equalizer Amp (BD3811K1) 10) Output mute controlled by either serial data or an external control terminal
●Applications AV receivers, home theater systems and mini-audio systems.
●Line up matrix
Parameter BD3811K1 BD3818KS
Input Selector 8 inputs 5 inputs
Input Gain 2Step 4 Step or 2 Step
Volume 0 to -103d B 1d B/Step 0 to -95d B 1d B/Step
Bass, Treble 14d B 2d B/Step 14d B 2d B/Step
Output Gain 0, 6 to 18d B 2d B/Step Variable depending on the external resistance
Mixing No Yes
Bass Boost 0 to 12d B, 4d B/Step 0 to 12d B, 4d B/Step
Dynamic type
Package QFP80 SQFP80
www.rohm.com 2010.06 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
Page Summary Contents For ROHM BD3811K1 Data Sheet
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 18 |
| File Size | 519.61 KB |
| Published | June 18, 2026 |
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Frequently Asked Questions
How should I power up this processor safely?
VEE and VCC must be powered on simultaneously, or VEE should be connected first, followed by VCC.
What is a major difference between BD3811K1 and BD3818KS?
The BD3818KS includes features not present in the K1 model, such as Dynamic Bass Boost and an operational amplifier.
How can I adjust the signal voltage levels?
You can use either the built-in Input Gain Amp or the Output Gain Amp for adjusting output signal voltages.
Can this processor be used in different home entertainment setups?
Yes, it is designed for AV receivers, general home theater systems and mini-audio systems.