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PDF BD37512FS Data sheet ( Hoja de datos )

Número de pieza BD37512FS
Descripción Sound Processor
Fabricantes ROHM Semiconductor 
Logotipo ROHM Semiconductor Logotipo



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Datasheet
Sound Processor with Built-in 2-band Equalizer
BD37512FS
General Description
BD37512FS 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 and 4ch
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.
Key Specifications
Power Supply Voltage Range:
Circuit Current (No Signal):
Total Harmonic Distortion:
Maximum Input Voltage:
Cross-talk Between Selectors:
Volume Control Range:
Output Noise Voltage:
Residual Output Noise Voltage:
Operating Temperature Range:
7.0V to 9.5V
15mA(Typ)
0.005%(Typ)
2.3Vrms(Typ)
-100dB(Typ)
+0dB to -40dB
6µVrms(Typ)
2µVrms(Typ)
-40°C to +85°C
Features
Reduce switching noise of mute, main volume,
fader volume, bass, trebles 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.
Decrease the number of external components due
to built-in 2-band equalizer filter.
It is possible to adjust the gain of the bass and
treble up to ±20dB with 1 dB step gain adjustment.
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.
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 structureSilicon monolithic integrated circuit
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product has no designed protection against radioactive rays
1/26
TSZ02201-0C2C0E100420-1-2
16.Dec.2015 Rev.001

1 page




BD37512FS pdf
BD37512FS
Electrical Characteristics - continued
Limit
Parameter
Symbol
Min Typ Max
Unit
Conditions
Mute Attenuation
Maximum Attenuation
Attenuation Set Error 1
Attenuation Set Error 2
Maximum Boost Gain
Maximum Cut Gain
Gain Set Error
Maximum Boost Gain
Maximum Cut Gain
Gain Set Error
Maximum Attenuation
Attenuation Set Error 1
Attenuation Set Error 2
Attenuation Set Error 3
Output Impedance
Maximum Output Voltage
GMUTE -105 -85
GV_MIN -43 -40 -37
GV_ERR1
-2
0
+2
GV_ERR2
-3
0
+3
GB_BST
18
20
22
GB_CUT
-22
-20
-18
GB_ERR
-2
0
+2
GT_BST
18
20
22
GT_CUT
-22
-20
-18
GT_ERR
-2
0
+2
GF_MIN -100 -90
GF_ERR1
-2
0
+2
GF_ERR2
-3
0
+3
GF_ERR3
-4
0
+4
ROUT - 50
VOM 2 2.2
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Ω
Vrms
Mute ON
GMUTE=20log(VOUT/VIN)
BW = IHF-A
Volume = -40dB
GV=20log(VOUT/VIN)
GAIN & ATT=0dB to -15dB
ATT=-16dB to -40dB
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=10kHz
VIN=100mVrms
GT=20log (VOUT/VIN)
Gain=-20dB f=10kHz
VIN=2Vrms
GT=20log (VOUT/VIN)
Gain=-20dB to +20dB
f=10kHz
Fader = -dB
GF=20log(VOUT/VIN)
BW = IHF-A
ATT=0dB to -15dB
ATT=-16dB to -47dB
ATT=-48dB to -62dB
VIN =100mVrms
THD+N=1
BW=400Hz-30KHz
VP-9690A(Average value detection, effective value display) filter by Matsushita Communication is used for * measurement.
Phase between input / output is same.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
5/26
TSZ02201-0C2C0E100420-1-2
16.Dec.2015 Rev.001

5 Page





BD37512FS arduino
BD37512FS
(2) I2C BUS FORMAT
MSB
LSB
S Slave Address
1bit 8bit
S
Slave Address
A
Select Address
Data
P
MSB
LSB MSB
LSB
A Select Address A
Data
AP
1bit 8bit 1bit 8bit 1bit 1bit
= Start condition (Recognition of start bit)
= Recognition of slave address. The first 7 bits correspond to the slave address.
The least significant bit is Lwhich corresponds to write mode.
= ACKNOWLEDGE bit (Recognition of acknowledgement)
= Select address corresponding to volume, bass or treble.
= Data on every volume and tone.
= Stop condition (Recognition of stop bit)
(3) I2C BUS Interface Protocol
(a) Basic Format
S Slave Address A
Select Address
A Data A
MSB
LSB MSB
LSB MSB LSB
P
(b) Automatic Increment (Select Address increases (+1) according to the number of data.)
S Slave Address A Select Address A Data1 A Data2 A ・・・・ DataN A
MSB
(Example)
LSB MSB
LSB MSB LSB MSB
LSB
Data1 shall be set as data of address specified by Select Address.
Data2 shall be set as data of address specified by Select Address +1.
DataN shall be set as data of address specified by Select Address +N-1.
MSB
LSB
P
(c) Configuration Unavailable for Transmission (In this case, only Select Address1 is set.)
S Slave Address A Select Address1 A Data A Select Address 2 A Data
MSB
LSB MSB
LSB MSB LSB MSB LSB MSB LSB
(Note) If any data is transmitted as Select Address 2 next to data, it is recognized
as data, not as Select Address 2.
AP
(4) Slave Address
MSB
LSB
A6 A5 A4 A3 A2 A1 A0 R/W
1 0 0 0 0 0 0 0 80H
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
11/26
TSZ02201-0C2C0E100420-1-2
16.Dec.2015 Rev.001

11 Page







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