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

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TSZ02201-0C2C0E100530-1-2

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

TSZ22111・14・001

www.rohm.com

16.Dec.2015 Rev.001

BD37532FV

General Description

BD37532FV is a sound processor with built-in 3-band

equalizer for car audio. A stereo input selector is

available that functions to switch single end input and

ground isolation input, input-gain control, main volume,

loudness, 5ch fader volume and LPF for subwoofer.

Moreover, “Advanced switch circuit”, which is an

original

ROHM

technology,

can

reduce

various

switching noise (ex. No-signal, low frequency like 20Hz

& large signal

inputs). Also, “Advanced switch” makes

control of microcomputer easier, and constructs a high

quality car audio system.

Features



Reduced switching noise of input gain control,

mute, main volume, fader volume, bass, middle,

treble, loudness by using advanced switch circuit



Built-in differential input selector that can make

various combination of single-ended / differential

input.



Built-in ground isolation amplifier inputs, which is

ideal for external stereo input.



Built-in input gain controller reduces

volume

switching noise for portable audio input.



Decreased number of external components due to

built-in 3-band equalizer filter, LPF for subwoofer

and loudness filter. It is possible to freely control Q,

Gv, fo of 3-band equalizer and fc of LPF, Gv of



A gain adjustment quantity of ±20dB with a 1 dB

step gain adjustment is possible for bass, middle

and treble.



Equipped with terminals for subwoofer outputs.

Also, the audio signal outputs of the front, rear and

control.



Energy-saving design resulting in low current

consumption is achieved utilizing the BiCMOS

process. It has the advantage in quality over

scaling down the power heat control of the internal

regulators.



Input pins and output pins are organized and

separately laid out in such a way that it simplifies

the pattern layout of the PCB and decreases the

board dimensions.



Applications

It is optimal for car audio systems. It can also be used

for audio equipments like mini Compo, micro Compo,

TV etc.

Key Specifications



Power Supply Voltage Range:

7.0V to 9.5V



Circuit Current (No Signal):

38mA(Typ)



Total Harmonic Distortion 1:

(FRONT,REAR)

0.001%(Typ)



Total Harmonic Distortion 2:

(SUBWOOFER)

0.002%(Typ)



Maximum Input Voltage:

2.3Vrms(Typ)



Crosstalk Between Selectors:

-100dB(Typ)



Volume Control Range:

+15dB to -79dB



Output Noise Voltage 1:

(FRONT,REAR)

3.8µVrms(Typ)



Output Noise Voltage 2:

(SUBWOOFER)

4.8µVrms(Typ)



Residual Output Noise Voltage:

1.8µVrms(Typ)



Operating Temperature Range:

-40°C to +85°C

Package

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

SSOP-B28

10.0mm x 7.60mm x 1.35mm

Datasheet

Datasheet