BD37541FS_15 Datasheet, PDF (1/37 Pages) Rohm – Sound Processor with Built-in 3-band Equalizer

Datasheet
Sound Processor with Built-in 3-band Equalizer
BD37541FS
General Description
BD37541FS is a sound processor with built-in 3-band
equalizer for car audio. The functions are stereo input
selector (which can switch single and ground isolation
input), input-gain control, main volume, loudness, 5ch
fader volume and mixing input. 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 can construct a high quality car audio
system.
Features
 Reduced switching noise of input gain control,
mute, main volume, fader volume, bass, middle,
treble, loudness, mixing 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 switching
noise for volume of a portable audio input.
 Decreased number of external components due to
built-in 3-band equalizer filter and loudness filter. It
is possible to control Q, GV, fO of 3-band equalizer
through I²C BUS control.
 It is possible to adjust the gain of the bass, middle,
treble up to ±20dB with 1 dB step gain adjustment.
 It is equipped with output terminals for Subwoofer.
Moreover, the stereo signal output of the front and
rear can also be chosen by the I²C BUS control.
 Built-in mixing input.
 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 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.
 It is possible to control the I²C BUS by 3.3V / 5V.
Key Specifications
 Power Supply Voltage Range:
 Circuit Current (No signal):
 Total Harmonic Distortion 1:
(FRONT,REAR)
 Total Harmonic Distortion 2:
(SUBWOOFER)
 Maximum Input Voltage:
 Cross-talk Between Selectors:
 Volume Control Range:
 Output Noise Voltage 1:
(FRONT,REAR)
 Output Noise Voltage 2:
(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)
+15 dB 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-A32
13.60mm x 7.80mm x 2.01mm
Applications
It is optimal for car audio systems. It can also be used
for audio equipment of 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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TSZ02201-0C2C0E100560-1-2
16.Dec.2015 Rev.001