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PDF BD37522FS Data sheet ( Hoja de datos )
| Número de pieza | BD37522FS | |
| Descripción | Sound Processor | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
Sound Processor with Built-in 2-band Equalizer
BD37522FS
General Description
BD37522FS is a sound processor with built-in 2-band
equalizer for car audio. Other features are stereo 5ch input
selector, input-gain control, main volume, loudness and a
4ch fader volume. It is equipped with an “Advanced switch
circuit”, which is an original ROHM technology, that reduces
various switching noise (ex. No-signal, low frequency like
20Hz & large signal inputs).The “Advanced switch” makes
controlling of microcomputer easier and can be used for
designing high quality car audio systems.
Key Specifications
Power Supply Voltage Range:
Circuit Current (No Signal):
Total Harmonic Distortion:
Maximum Input Voltage:
Crosstalk Between Selectors:
Volume Control Range:
Output Noise Voltage:
Residual Output Noise Voltage:
Operating Temperature Range:
7.0V to 9.5V
38mA(Typ)
0.001%(Typ)
2.3Vrms(Typ)
-100dB(Typ)
+15dB to -79dB
3.8µVrms(Typ)
1.8µVrms (Typ)
-40°C to +85°C
Features
Reduced switching noise of input gain control, mute,
main volume, fader volume, bass, treble, and
loudness by using advanced switch circuit.
Built-in 1 differential input selector and 4
single-ended input selectors
Built-in ground isolation amplifier inputs which is
ideal for external stereo input.
Built-in input gain controller which reduces switching
noise for volume of a portable audio input.
Lesser number of external components due to
built-in 2-band equalizer filter and loudness filter.
These make it possible to control Q, Gv, fo of 2-band
equalizer, and Gv of loudness by I2C BUS
A gain adjustment quantity of ±20dB with a 1 dB step
gain adjustment is possible for the bass, middle, and
treble.
Energy-saving design resulting in low current
consumption is achieved by 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 be controlled by a 3.3V / 5V I2C BUS
Package
W(Typ) x D(Typ) x H(Max)
SSOP-A24
10.00mm x 7.80mm x 2.10mm
Applications
It is optimal for car audio systems. It can also be used
for audio equipment 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
1/27
TSZ02201-0C2C0E100470-1-2
16.Dec.2015 Rev.001
1 page  
BD37522FS
Electrical Characteristics - continued
Limit
Parameter
Symbol
Unit
Min Typ Max
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 － -100 -85
GV_ERR1
-2
0
+2
GV_ERR2
-3
0
+3
GV_ERR3
-4
0
+4
GB_BST
18
20
22
GB_CUT
-22
-20
-18
GB_ERR
-2
0
+2
GT_BST
17
20
23
GT_CUT
-23
-20
-17
GT_ERR
-2
0
+2
Volume = +15dB
dB VIN=100mVrms
GV=20log(VOUT/VIN)
Volume = -∞dB
dB GV=20log(VOUT/VIN)
BW = IHF-A
dB GAIN & ATT=+15dB to -15dB
dB ATT=-16dB to -47dB
dB ATT=-48dB to -79dB
GAIN=+20dB f=100Hz
dB VIN=100mVrms
GB=20log (VOUT/VIN)
GAIN=-20dB f=100Hz
dB VIN=2Vrms
GB=20log (VOUT/VIN)
dB Gain=+20dB to -20dB f=100Hz
Gain=+20dB f=10kHz
dB VIN=100mVrms
GT=20log (VOUT/VIN)
Gain=-20dB f=10kHz
dB VIN=2Vrms
GT=20log (VOUT/VIN)
dB Gain=+20dB to -20dB f=10kHz
Fader = -∞dB
GF_MIN － -100 -90 dB GF=20log(VOUT/VIN)
BW = IHF-A
GF_ERR1
-2
0
+2 dB ATT=-1dB to -15dB
GF_ERR2
-3
0
+3 dB ATT=-16dB to -47dB
GF_ERR3
-4
0
+4 dB ATT=-48dB to -79dB
ROUT - － 50 Ω VIN =100mVrms
VOM
2 2.2 － Vrms THD+N=1％
BW=400Hz-30KHz
Gain 20dB
GL_MAX
17
20
23 dB 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
TSZ02201-0C2C0E100470-1-2
16.Dec.2015 Rev.001
5 Page 
BD37522FS
(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. 7 bits in upper order are voluntary.
The least significant bit is “L” due to writing.
= ACKNOWLEDGE bit (Recognition of acknowledgement)
= Select every of volume, bass and treble.
= Data on every volume and tone.
= Stop condition (Recognition of stop bit)
(3) I2C BUS Interface Protocol
(a) Basic Form
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 ････
MSB
(Example)
LSB MSB
LSB MSB LSB
MSB LSB
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.
DataN A P
MSB LSB
(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
TSZ02201-0C2C0E100470-1-2
16.Dec.2015 Rev.001
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BD37522FS.PDF ] | |
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