BD37532FV_15 Datasheet, PDF (1/34 Pages) Rohm – Sound Processor with Built-in 3-band Equalizer

Datasheet
Sound Processor with Built-in 3-band Equalizer
BD37532FV
General Description
BD37532FV 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, 5ch fader volume and LPF for subwoofer.
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 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 for portable audio input.
 Decreased number of external components due to
built-in 3-band equalizer filter, LPF for subwoofer
and loudness filter. It is possible to freely control Q,
Gv, fo of 3-band equalizer and fc of LPF, Gv of
loudness by I²C BUS control.
 A gain adjustment quantity of ±20dB with a 1 dB
step gain adjustment is possible for bass, middle
and treble.
 Equipped with terminals for 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 in such a way that it simplifies
the pattern layout of the PCB and decreases 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:
 Crosstalk 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 equipments like 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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TSZ02201-0C2C0E100530-1-2
16.Dec.2015 Rev.001