BD37531FV_15 Datasheet, PDF (1/34 Pages) Rohm – Sound Processor with Built-in 3-band Equalizer

Datasheet
Sound Processor with Built-in 3-band Equalizer
BD37531FV
General Description
BD37531FV 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 and 5ch fader volume. 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 microcomputer control
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 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 freely control the Q, Gv, fo of the
3-band equalizer, and Gv of the loudness
through the I²C BUS control
 A gain adjustment quantity of ±20dB with a 1 dB
step gain adjustment is possible for the bass,
middle and treble.
 Equipped with terminals for the subwoofer outputs.
Also, the audio signal outputs of the front, rear and
subwoofer can be chosen using the I²C BUS
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 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 control I²C BUS with 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)
+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-B28
10.0mm x 7.60mm x 1.35mm
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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TSZ02201-0C2C0E100520-1-2
16.Dec.2015 Rev.001