Sound Processors with built-in 2-band Equalizers - BD37522FS

This series supports common control software, increasing design and development efficiency. In addition, an internal 2-band equalizer enables the adjustment of the tone and bass signals without using external components, while 3 input selectors and 4ch independent volume and fader control ensure compatibility with 3 audio inputs and 4ch output (front/rear/left/right), contributing to greater space savings.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
número de peça
Estado de Condição
Quantidade Unidade
Quantidade mínima Package
tipo de embalagem
BD37522FS-E2 Active SSOP-A24 2000 2000 Taping sim
Vcc(Min.)[V] 7.0
Vcc(Max.)[V] 9.5
Iq[mA] 38.0
Outputs 4
Volume Range +15to-79, -∞
Tone Control Band BASS, Treble
Number of of single input 4
Number of of ISO input 1
Input Gain[dB] 0to+20
Parametric EQ Yes
FADER[dB] 0to-79, -∞
THD[%] 0.0010
Output Noise[µVrms] 3.8
Output voltage(Max.)[Vrms] 2.3
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
  • ・Reduce switching noise of input gain control, mute, main volume,
        fader volume, bass, treble, loudness by using advanced switch circuit
        [Possible to control all steps]
    ・Built-in ground isolation amplifier inputs, ideal for external stereo input.
    ・Built-in input gain controller reduce switching noise for volume of
        a portable audio input.
    ・Decrease the number of external components by
        built-in 2-band equalizer filter and loudness filter.
        And, possible to control Q, Gv, fo of 2-band equalizer
        and fo, Gv of loudness by I²C BUS control freely.
    ・It is possible for the bass, treble to the gain adjustment
        quantity of ±20dB and 1 dB step gain adjustment.
    ・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.
    ・Package is SSOP-A24. Putting input-terminals together
        and output-terminals together can make PCB layout easier
        and can makes area of PCB smaller.)
    ・It is possible to control by 3.3V / 5V for I²C BUS.
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Dados técnicos
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.