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PDF BD37534FV Data sheet ( Hoja de datos )

Número de pieza BD37534FV
Descripción Sound Processor
Fabricantes ROHM Semiconductor 
Logotipo ROHM Semiconductor Logotipo



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Datasheet
Sound Processor with Built-in 3-band Equalizer
BD37534FV
General Description
BD37534FV 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, LPF for subwoofer 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 microcomputer control 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 of a 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
the Q, Gv, fo of the 3-band equalizer and fc of the
LPF and Gv of the loudness through the I2C BUS
control
A gain adjustment quantity of ±20dB with a 1 dB
step gain adjustment is possible for the bass,
middle and treble.
Equipped with terminals for the subwoofer outputs.
Also, the audio signal outputs of the front, rear
and subwoofer can be chosen using the I2C BUS
control.
Built-in mixing input and mixing attenuator.
Energy-saving design resulting in low current
consumption is achieved by utilizing the BiCMOS
process. It has the advantage of 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. This consequently simplifies the pattern
layout of the set board and decreases the board
dimensions.
It is possible to control the 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:
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)
+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 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
1/35
TSZ02201-0C2C0E100550-1-2
16.Dec.2015 Rev.001

1 page




BD37534FV pdf
BD37534FV
Electrical Characteristics - continued
Parameter
Mute Attenuation *
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 Boost Gain
Maximum Cut Gain
Gain Set Error
Input Impedance
Maximum Input Voltage
Maximum Attenuation *
Maximum Gain
Maximum Boost Gain
Maximum Attenuation *
Gain Set Error
Attenuation Set Error 1
Attenuation Set Error 2
Attenuation Set Error 3
Output Impedance
Maximum Output Voltage
Symbol Min
GMUTE
GV_MAX
13
GV_MIN
GV_ERR1
GV_ERR2
GV_ERR3
GB_BST
-2
-3
-4
18
GB_CUT
GB_ERR
GM_BST
-22
-2
18
GM_CUT
GM_ERR
GT_BST
-22
-2
18
GT_CUT
GT_ERR
RIN_M
VIM_M
-22
-2
19
2.0
GMX_MIN
GMX_MAX
5
GF_BST
13
GF_MIN
GF_ERR
GF_ERR1
GF_ERR2
GF_ERR3
ROUT
VOM
-2
-2
-3
-4
-
2
Limit
Typ
-105
15
-100
0
0
0
20
-20
0
20
-20
0
20
-20
0
27
2.2
-100
7
15
-100
0
0
0
0
2.2
Max
-85
17
-85
+2
+3
+4
22
-18
+2
22
-18
+2
22
-18
+2
35
-85
9
17
-90
+2
+2
+3
+4
50
Unit Conditions
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Vrms
dB
dB
dB
dB
dB
dB
dB
dB
Ω
Vrms
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
ATT=+7dB
GMX=20log(VOUT/VIN)
Fader=15dB
VIN=100mVrms
GF=20log(VOUT/VIN)
Fader = -∞dB
GF=20log(VOUT/VIN)
BW = IHF-A
Gain=+15dB to +1dB
ATT=-1dB to -15dB
ATT=-16dB to -47dB
ATT=-48dB to -79dB
VIN=100mVrms
THD+N=1
BW=400Hz-30KHz
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
5/35
TSZ02201-0C2C0E100550-1-2
16.Dec.2015 Rev.001

5 Page





BD37534FV arduino
BD37534FV
Typical Performance Curves continued
0
-10
-20
-30
-40
-50
-60
-70
10 100 1k 10k 100k
FFrereqquueencyy[(HHzz] )
Figure 17. CMRR vs Frequency
2.5
2.0
1.5
1.0
0.5
0.0
100
1000 10000
出力負荷[ohm]
RLOAD [ohm]
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.
TSZ2211115001
11/35
TSZ02201-0C2C0E100550-1-2
16.Dec.2015 Rev.001

11 Page







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