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PDF BD37514FS Data sheet ( Hoja de datos )
| Número de pieza | BD37514FS | |
| Descripción | Sound Processor | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
Sound Processor with Built-in 2-band Equalizer
BD37514FS
General Description
BD37514FS 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 and loudness filter.
Also, it is possible to control Q, Gv, fo of 2-band
equalizer, 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
TSZ02201-0C2C0E100440-1-2
16.Dec.2015 Rev.001
1 page  
BD37514FS
Electrical Characteristics - continued
(Unless specified otherwise, Ta=25°C, VCC=8.5V, f=1kHz, VIN=1Vrms, Rg=600Ω, RL=10kΩ, A input, Input gain 0dB,
Mute OFF, Volume 0dB, Tone control 0dB, Loudness 0dB, Fader 0dB)
Limit
Parameter
Symbol Min Typ Max
Unit
Conditions
Maximum Gain
Maximum Attenuation＊
Attenuation Set Error 1
Attenuation Set Error 2
Attenuation Set Error 3
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
Maximum Gain
GV_MAX +13 +15 +17
GV_MIN
GV_ERR1
GV_ERR2
GV_ERR3
GB_BST
－
-2
-3
-4
+18
-100
0
0
0
+20
-85
+2
+3
+4
+22
GB_CUT -22 -20 -18
GB_ERR
-2
0
+2
GT_BST
+18 +20
+22
GT_CUT -23 -20 -17
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 －
GL_MAX +17 +20 +23
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Ω
Vrms
dB
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=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 -79dB
VIN=100mVrms
THD+N=1％
BW=400Hz-30KHz
Gain 20dB
VIN=100mVrms
GL=20log(VOUT/VIN)
Gain Set Error
GL_ERR
-2
0
+2
dB GAIN=+20dB to +1dB
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.
TSZ22111・15・001
5/27
TSZ02201-0C2C0E100440-1-2
16.Dec.2015 Rev.001
5 Page 
BD37514FS
(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 “L” which 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
MSB
LSB MSB
LSB MSB LSB MSB LSB
MSB
(Example) ① Data1 shall be set as data of address specified by Select Address.
② Data2 shall be set as data of address specified by Select Address +1.
③ DataN shall be set as data of address specified by Select Address +N-1.
LSB
A
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 A
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.
P
(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.
TSZ22111・15・001
11/27
TSZ02201-0C2C0E100440-1-2
16.Dec.2015 Rev.001
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BD37514FS.PDF ] | |
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