BD37524FS_15 Datasheet, PDF (1/35 Pages) Rohm – Sound Processor with Built-in 3-band Equalizer

Datasheet
Sound Processor with Built-in 3-band Equalizer
BD37524FS
General Description
BD37524FS is a sound processor with built-in 3-band
equalizer for car audio. Other features are stereo 5ch
input selector, input-gain control, main volume,
loudness, 5ch fader volume, LPF for subwoofer, level
meter. It is equipped with an “Advanced switch circuit”,
which is an original ROHM technology that reduces
various switching noise (ex. No-signal, low frequency
likes 20Hz & large signal inputs). The “Advanced
switch” makes control of microcomputer easier and can
be used for designing high quality car audio systems.
Features
 Reduced switching noise of input gain control,
mute, main volume, fader volume, bass, treble,
and loudness by using advanced switch circuit
 Built-in differential input selector and 4
single-ended input selectors
 Built-in ground isolation amplifier inputs, which is
ideal for external stereo input.
 Built-in input gain controller reduces switching
noise for volume of a portable audio input.
 Lesser number of external components due to
built-in 3-band equalizer filter, LPF for subwoofer,
loudness filter. This makes,it possible to control
the Q, Gv, fo of 3-band equalizer, fc of LPF, fo, and
Gv of loudness through I²C BUS.
 A gain adjustment quantity of ±20dB with 1 dB
step gain adjustment is possible for bass, middle,
and treble.
 Built-in subwoofer output terminals.
 Energy-saving design resulting in low current
consumption is achieved by utilizing the Bi-CMOS
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 to keep the signal flow in one
direction which consequently, simplify pattern
layout of the set board and decrease the board
dimensions. .
 It is possible to be controlled by a 3.3V / 5V I²C
BUS
Key Specifications
 Power Supply Voltage Range:
 Circuit Current (No Signal):
 Total Harmonic Distortion1
(FRONT,REAR):
 Total Harmonic Distortion2
(SUBWOOFER):
 Maximum Input Voltage:
 Cross-talk Between Selectors:
 Volume Control Range:
 Output Noise Voltage1
(FRONT,REAR):
 Output Noise Voltage2
(SUBWOOFER):
 Residual Output Noise Voltage:
 Operating Temperature Range:
7.0V to 9.5V
38mA(Typ)
0.001%(Typ)
0.002%(Typ)
2.3Vrms(Typ)
-100dB(Typ)
+15dB to -79dB
3.8µVrms(Typ)
4.8µVrms(Typ)
1.8µVrms(Typ)
-40°C to +85°C
Package
W(Typ) x D(Typ) x H(Max)
SSOP-A24
10.00mm x 7.80mm x 2.10mm
Applications
It is optimal for car audio systems. It is also suitable for
other audio equipment such as mini Compo, micro
Compo, TV etc
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has no designed protection against radioactive rays
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TSZ02201-0C2C0E100490-1-2
16.Dec.2015 Rev.001