Single Power Supply Sound Processors with Built-in Pre-amp for Tape Recording and Playback - BD3402KS2

ROHM sound processors integrate a five-input selector, electronic volume control, 2- or 3-band equalizer, and a cassette tape recording and playback amps on a single chip and feature low distortion (0.0013% Typ.), making them ideally suited for use in mini-component and portable audio systems. In addition, they offer compatibility with single power supplies.

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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
BD3402KS2 Active SQFP-T64 1000 1000 Tray Yes
Vcc(Min.)[V] 8.0
Vcc(Max.)[V] 9.5
Iq[mA] 28.0
I/F 2-wire
Tone Control Band BASS, Treble
Input Gain[dB] -5 / 0 / 3.5
THD[%] 0.0050
Output Noise[µVrms] 2.5
Output voltage(Max.)[Vrms] 2.5
Operating Temperature (Min.)[°C] -25
Operating Temperature (Max.)[°C] 75
  • ・Provides Surround and Bass Boost with the Soft-switching feature to reduce the shock
        sound at switching (BD3401KS・
    ・Provides a specialized power supply terminal in a digital circuit ,in order to set and
        maintain the state inside the IC by the minute stand-by current.
    ・Built-in preamplifier for cassette recording/playing allows for minimal external
        components,feeling up board space.
    ・Arranges all I/O terminals to a single point and allows easy PCB routing.
    ・Volume and Tone implemented with a resistance ladder circuit;achieving high
        performance with low noise and low distortion.
    ・Enargy-saving design resulting in low current consumption,by utilizing the BiCOMS
        process.It has the advantage in quality over the scaling down the power heat
        control of the     internal regulators.
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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.