5.1ch Sound Processors - BD3818KS

ROHM 5.1 sound processor ICs make it easy to configure 5.1 home theater systems.

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* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Unit Quantity
Minimum Package Quantity
Packing Type
BD3818KS Active SQFP80 500 50 Tray Yes
Vcc(Min.)[V] 10.0
Vcc(Max.)[V] 14.8
Iq[mA] 56.0
I/F 2-wire
Outputs 6
Volume Range 0to-95dB 1dB / step
Tone Control Band BASS, Treble
Input Gain[dB] 0, 3, 6, 9dB
THD[%] 0.0020
Output Noise[µVrms] 1
Output voltage(Max.)[Vrms] 4.3
Operating Temperature (Min.)[°C] -20
Operating Temperature (Max.)[°C] 75
  • ・Independent 6 channels for Master Volume (0 to -103dB, 1dB/Step, MUTE, BD3811K1)
        (0 to -95dB 1dB/Step, MUTE, BD3818KS)
        Implementation of a resistance ladder type circuit reduces residual noise and a
        shock sound at switching.
    ・Low current consumption design achieved by adopting the BiCMOS process
    ・Maximum output voltage (BD3818KS): 4.3Vrms (Vcc=7V, VEE=-7V, RL=10kohm)
        Maximum output voltage (BD3811K・: 4.2Vrms (Vcc=7V, VEE=-7V, RL=10kohm)
    ・Built-in Input Gain Amp useful for adjusting the output signal voltages
    ・Built-in Operational Amplifier useful for filter construction (BD3818KS)
    ・Built-in Dynamic Bass Boost circuit (BD3818KS)
    ・2-wire serial control (BD3818KS for 5V, BD3811K1 for both 3.3V and 5V)
    ・Built-in Output Gain Amp useful for adjusting the output signal voltages (BD3811K1)
    ・REC output terminal with a REC input/output switch useful for monitoring Equalizer Amp
    ・Output mute controlled by either serial data or an external control terminal
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Thermal Resistance