ROHM Product Detail

BD37521FS

Sound Processors with built-in 2-band Equalizers
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BD37521FS

BD37521FS
Sound Processors with built-in 2-band Equalizers

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.

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* This is a standard-grade product.
For Automotive usage, please contact Sales.
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Product Detail

 
Part Number | BD37521FS-E2
Status | Recommended
Package | SSOP-A24
Packing Type | Taping
Unit Quantity | 2000
Minimum Package Quantity | 2000
RoHS | Yes

Specifications:

Input (ch) ?

Stereo 3

ISO Input (ch) ?

Stereo 1

Input Gain (dB/Ad-Sw) ?

+20~0/Yes

Vcc(Min.)[V]

7

Vcc(Max.)[V]

9.5

Iq[mA]

38

Outputs

4

Tone Control Band

BASS, Treble

Number of of single input

3

Volume (ch/Ad-Sw) ?

2/Yes

Volume Range/Step (dB/dB) ?

+15~-79, -∞/1

[I] Independent from Input Selector / [C] Cascade from Input Selector ?

C

Fader (ch/Ad-Sw) ?

4/Yes

Fader Range/Step (dB/dB) ?

0~-79, -∞/1

Output Voltage (V, typ)

2.2

THD+N (dB)

0.001

EQ (number of Band) ?

2

MUTE Terminal ?

Yes

Output Noise[µVrms]

3.8

Other ?

Loudness

I/F

I2C

Power Supply Voltage (V) ?

7.0~9.5

Temperature (Min.)[°C]

-40

Temperature (Max.)[°C]

85

Package Size [mm]

10.0x7.8 (t=2.1)

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Features:

  • 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, possible to control Gv by I²C BUS control.
  • 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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