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BD37544FS データシート(PDF) 1 Page - Rohm

部品番号 BD37544FS
部品情報  Sound Processor with Built-in 3-band Equalizer
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メーカー  ROHM [Rohm]
ホームページ  http://www.rohm.com
Logo ROHM - Rohm

BD37544FS データシート(HTML) 1 Page - Rohm

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〇Product structure : Silicon monolithic integrated circuit 〇This product has no designed protection against radioactive rays
.
1/37
TSZ02201-0C2C0E100590-1-2
© 2015 ROHM Co., Ltd. All rights reserved.
16.Dec.2015 Rev.001
TSZ22111 • 14 • 001
www.rohm.com
Sound Processor with Built-in 3-band Equalizer
BD37544FS
General Description
BD37544FS is a sound processor with built-in 3-band
equalizer for car audio. The functions are stereo input
selector
(which can switch single and GND isolation),
input-gain control, main volume, super bass, 5ch fader
volume, LPF/HPF for subwoofer, 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,
super bass, 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, LPF for subwoofer,
and HPF. It is possible to control Q, GV, fO of 3-band
equalizer and fC of LPF/HPF through I2C BUS
control.
It is possible to adjust the gain of the bass, middle,
and 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 and mixing attenuator.
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:
7.0V to 9.5V
Circuit Current (No Signal):
38mA (Typ)
Total Harmonic Distortion:
THD+N1
0.001% (Typ)
THD+N2
0.002% (Typ)
Maximum Input Voltage:
2.3Vrms(Typ)
Cross-talk Between Selectors:
-100dB(Typ)
Volume Control Range:
+15 dB to -79dB
Output Noise Voltage:
VNO1
3.8µVrms(Typ)
VNO2
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)
.
Applications
It is optimal for car audio systems. It can also be used for
audio equipment of mini Compo, micro Compo, TV, etc.
.
SSOP-A32
13.60 mm x 7.80mm x 2.01mm
Datasheet
Datasheet


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