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PDF BD37541FS Data sheet ( Hoja de datos )
| Número de pieza | BD37541FS | |
| Descripción | Sound Processor | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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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
1 page  
BD37541FS
Electrical Characteristics - continued
Parameter
Limit
Symbol
Min Typ Max
Minimum Input Gain
GIN_MIN
-2
0 +2
Maximum Input Gain
Gain Set Error
Mute Attenuation *
GIN_MAX
18
20
22
GIN_ERR
-2
0 +2
GMUTE
－ -105 -85
Maximum Gain
GV_MAX
13
15
17
Maximum Attenuation *
Attenuation Set Error 1
Attenuation Set Error 2
Attenuation Set Error 3
Maximum Boost Gain
GV_MIN
－ -100 -85
GV_ERR1
GV_ERR2
GV_ERR3
-2
-3
-4
0 +2
0 +3
0 +4
GB_BST 18 20 22
Maximum Cut Gain
Gain Set Error
Maximum boost gain
GB_CUT -22 -20 -18
GB_ERR
-2
0
+2
GM_BST
18
20
22
Maximum cut gain
Gain set error
Maximum Boost Gain
GM_CUT -22 -20 -18
GM_ERR
-2
0
+2
GT_BST 18 20 22
Maximum Cut Gain
Gain Set Error
Input Impedance
Maximum Input Voltage
Maximum Attenuation
GT_CUT -22 -20 -18
GT_ERR
-2
0
+2
RIN_M 19 27 35
VIM_M
2.0 2.2
－
GMX_MIN － -100 -85
Unit
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
kΩ
Vrms
dB
Conditions
Input gain 0dB
VIN=100mVrms
GIN=20log(VOUT/VIN)
Input gain 20dB
VIN=100mVrms
GIN=20log(VOUT/VIN)
GAIN=+1dB to +20dB
Mute ON
GMUTE=20log(VOUT/VIN)
BW = IHF-A
Volume = 15dB
VIN=100mVrms
GV=20log(VOUT/VIN)
Volume = -∞DB
GV=20LOG(VOUT/VIN)
BW = IHF-A
GAIN & ATT=+15dB to -15dB
ATT=-16dB to -47dB
ATT=-48dB to -79dB
Gain=+20dB f=100Hz
VIN=100mVrms
GB=20log (VOUT/VIN)
Gain=-20dB f=100Hz
VIN=2Vrms
GB=20log (VOUT/VIN)
Gain=-20dB to +20dB
f=100Hz
Gain=+20dB f=1kHz
VIN=100mVrms
GM=20log (VOUT/VIN)
Gain=-20dB f=1kHz
VIN=2Vrms
GM=20log (VOUT/VIN)
Gain=-20dB to +20dB f=1kHz
Gain=+20dB f=10kHz
VIN=100mVrms
GT=20log (VOUT/VIN)
Gain=-20dB f=10kHz
VIN=2Vrms
GT=20log (VOUT/VIN)
Gain=-20dB to +20dB
f=10kHz
VIM at THD+N(VOUT)=1％
BW=400Hz-30KHz
MIX=OFF
GMX=20log(VOUT/VIN)
BW=INF-A
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/33
TSZ02201-0C2C0E100560-1-2
16.Dec.2015 Rev.001
5 Page 
BD37541FS
Typical Performance Curves – continued
0
-10
-20
-30
-40
-50
-60
-70
10
100 1k 10k
Frequency [Hz]
100k
Frequency (Hz)
Figure 17. CMRR vs Frequency
2.5
2.0
1.5
1.0
0.5
0.0
100
1000 10000
出力R負LOA荷D [o[homh]m]
100000
Figure 18. Output Voltage vs RLOAD
Figure 19. Advanced Switch 1
Figure 20. Advanced Switch 2
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/33
TSZ02201-0C2C0E100560-1-2
16.Dec.2015 Rev.001
11 Page | ||
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| PDF Descargar | [ Datasheet BD37541FS.PDF ] | |
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