BD37515FS_15 Datasheet, PDF (1/31 Pages) Rohm – Sound Processor with Built-in 2-band Equalizer

Datasheet
Sound Processor with Built-in 2-band Equalizer
BD37515FS
General Description
BD37515FS 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,
loudness, and 5ch 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 input gain control, mute,
main volume, fader volume, bass, treble, loudness
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.
 Built-in input gain controller reduces switching
noise for volume of a portable audio input.
 Decrease the number of external components due
to built-in 2-band equalizer filter, LPF for
subwoofer, and loudness filter. Also, it is possible
to control Q, Gv, fo of 2-band equalizer, fc of LPF
for subwoofer and Gv of loudness using I²C BUS
control.
 It is possible to adjust the gain of the bass and
treble up to ±20dB with 1 dB step gain adjustment.
 It is equipped with output terminals of Subwoofer.
 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.
 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 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-A20
8.70mm x 7.80mm x 2.01mm
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.
○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
1/27
TSZ02201-0C2C0E100450-1-2
16.Dec.2015 Rev.001