○Product structure：Silicon monolithic integrated circuit ○This product has no designed protection against radioactive rays

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TSZ02201-0C2C0E100420-1-2

© 2015 ROHM Co., Ltd. All rights reserved.

TSZ22111・14・001

www.rohm.com

16.Dec.2015 Rev.001

BD37512FS

General Description

BD37512FS is a sound processor with built-in 2-band

equalizer for car audio. The functions are 4ch stereo

input selector, input-gain control, main volume and 4ch

fader volume. Moreover, its

“Advanced switch circuit”,

which is an original ROHM technology, can reduce

various switching noise (ex. No-signal, low frequency

like 20Hz & large signal inputs). “Advanced switch”

makes control of microcomputer easier, supporting the

construction of a high quality car audio system.

Features



Reduce switching noise of mute, main volume,

fader volume, bass, trebles by using advanced

switch circuit



Built-in

1

differential

input

selector

and

3

single-ended input selectors.



Built-in ground isolation amplifier inputs, ideal for

external stereo input.



Decrease the number of external components due

to built-in 2-band equalizer filter.



It is possible to adjust the gain of the bass and

treble up to ±20dB with 1 dB step gain adjustment.



Energy-saving design resulting in low current

consumption, by utilizing the Bi-CMOS process. It

has the advantage in quality over scaling down the

power heat control of the internal regulators.



Input terminals and output terminals are organized

and separately laid out to keep the signal flow in

one direction which results in simpler and smaller

PCB layout.



Applications

It is optimal for use in car audio systems. It can also be

used for audio equipment of mini Compo, micro Compo,

TV, etc.

Key Specifications



Power Supply Voltage Range:

7.0V to 9.5V



Circuit Current (No Signal):

15mA(Typ)



Total Harmonic Distortion:

0.005%(Typ)



Maximum Input Voltage:

2.3Vrms(Typ)



Cross-talk Between Selectors:

-100dB(Typ)



Volume Control Range:

+0dB to -40dB



Output Noise Voltage:

6µVrms(Typ)



Residual Output Noise Voltage:

2µVrms(Typ)



Operating Temperature Range:

-40°C to +85°C

Package

W(Typ) x D(Typ) x H(Max)

SSOP-A20

8.70mm x 7.80mm x 2.01mm

Datasheet

Datasheet