Sound Processor with Built-in Surround Sound Function - BD3491FS

Built in stereo 6 input selectors and volume that there is not an impedance change of a volume terminal. And this is sound processor can realize 2-band equalizer (Bass/Treble, Gain±14dB / 2dB_step) and BassBoost, Output gain, Surround by external components.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Unit Quantity
Minimum Package Quantity
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Constitution Materials List
BD3491FS-E2 Active SSOP-A32 2000 2000 Taping inquiry Yes
Vcc(Min.)[V] 4.75
Vcc(Max.)[V] 9.5
Iq[mA] 7.0
Volume Range 0to-87 / -∞ (1dB / step) Independent control
Tone Control Band BASS, Treble
Input Gain[dB] 0 / 2 / 4 / 6 / 8 / 12 / 16 / 20
Surround Yes
THD[%] 0.0020
Output Noise[µVrms] 5
Output voltage(Max.)[Vrms] 2.3
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
  • · Equipped with 6 single ended stereo input selectors.
    · Built-in input gain controller suitable for mobile audio.
    · Volume input terminal can be used as a microphone input terminal since its impedance remains constant even if volume setting is changed.
    · Bi-CMOS process is suitable for the design of low current and low energy. It also provides more quality for Bi-CMOS small scale regulator and heat in a set.
    · The package of this IC is SSOP-A32. Sound input terminals and output terminals arrangement is optimized for easy and fast layout of PCB pattern. At the same time, it minimizes PCB area.
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