Sound Processors with Built-in 2-Band Equalizer - BD3490FV

ROHM's sound processors deliver high-fidelity audio, are easy to use, integrate a two-band equalizer, and are compatible with power supply voltages between 4.75V and 9.5V due to low current consumption operation, making them ideally suited for use in portable stereo systems.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
BD3490FV-E2 Active SSOP-B28 2000 2000 Taping 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
  • ・Low noise (5μVrms(TYP.)) and low distortion(0.002% (TYP.)).
    ・Built-in simple surround. Furthermore, it can constitute good surround of sound image
        normal position with an external part.
    ・It can constitute a bass boost or output gain with an external part.
    ・When the volume setting exchanging, it can use a volume terminal as a microphone input
        because there is not an impedance change of a volume terminal.
    ・Bi-CMOS process is suitable for the design of low current and low energy. And it provides
        more quality for small scale regulator and heat in a set.
    ・The package of this IC is SSOP-B28. It gathers a sound input terminals, sound output
        terminals respectively and it arranges them, to be arranging facilitates the
        laying-out of PCB pattern and reduces PCB area to one-way in the flow of the
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New Products:
Technical Data
Thermal Resistance

The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.