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Featured Products
High quality High fidelity
Sound Processors for Car AV
BD37033FV / BD37034FV / BD37068FV / BD34701KS2
Dedicated analog technology utilized
for high resolution audio with superior noise reduction
Low
Distortion
Low
Noise
High
Fidelity
Reduced switching pop noise
Decreases noise in mobile phones
through-sounds from
external sources
process technology
that improves noise
characteristics in the lowfrequency region
Achieves significantly lower
distortion through marketproven expertise
Optimized distortion and noise countermeasures
Minimal Noise
Reduced Distortion
Output Amplitude vs. Distortion
Frequency vs. Noise
1
-100
Standard Audio
-110
Standard Audio
Noise (dB)
THD+N (%)
0.1
0.01
0.001
Reduced
-120
10x
-130
10x
New
New
lower
0.0001
0.001
-140
0.005
0.01
0.05
Vo (Vrms)
0.1 0.2
0.5
1
2
10
20
50
100
200
500 1k
2k
5k 10k 20k
Frequency (Hz)
Technology cultivated over many years has allowed ROHM to successfully
minimize distortion and noise in regions that cannot be reproduced through simulation,
contributing to superior audio quality
Smooth, natural volume control
Advanced switching performance
With Switching
Volume control is considered the most important function of
a sound processor.
ROHM has been working to achieve
natural volume adjustment utilizing advanced proprietary
switching technology that eliminates popping noise for
smooth switching similar to analog volume control.
Magnified
Magnified
Without Switching
Natural, smooth volume adjustment
Considerably lower RF noise from mobile phones
New
Conventional
Noise reduced
by more than
10x
Unpleasant noise may be generated in car audio systems a few seconds before receiving phone calls. To prevent this,
ROHM has developed technology that reduces this RF noise by more than 10 times with no degradation in sound quality.
No through-noise from external audio sources (when OFF)
Through-Sound
New
Conventional
Power OFF
Audio
Sound leakage
reduced more
than 30x
Power Amp.
A sound leakage prevention function is built in that minimizes through-sound from external sources by more than 30x
at power OFF when using an external power amp. (BD37034FV)
Lineup (With Advanced Switching Function)
Recommended
Applications
Car Audio
Car Audio
(DSP Compatible)
Part No.
(DSP Compatible)
−
Tone Control External High Voltage
(bands)
Input (ch) Output
Volume
(ch)
Fader
(ch)
5
2
6
3
−
5
2
6
3
−
Package
BD37033FV
7.0 to 9.5
BD37034FV
VCCL=7.0 to 9.5
VCCH=VCCL to 13.0
BD37534FV
7.0 to 9.5
−
−
6
2
6
3
−
−
SSOP-B28
BD37523FS
7.0 to 9.5
−
−
5
2
5
2
−
−
SSOP-A24
BD37503FV
7.0 to 9.5
−
−
4
2
4
2
−
−
SSOP-B20
BD37068FV
VCCL=7.0 to 9.5
VCCH=VCCL to 17.0
−
6
6
−
6
−
SSOP-B28
SSOP-B28
SSOP-B40
BD3461FS
7.0 to 9.5
−
−
−
6
−
6
−
SSOP-A24
BD3465FV
7.0 to 9.5
−
−
−
4
−
4
−
SSOP-B20
−
12
8
−
8
SQFP-T52
8
−
8
SQFP-T80C
6
−
6
SQFP-T80C
BD34701KS2
AV Receivers
Operating Voltage RF Noise Pop Noise Sound
Input
Leakage Source (ch)
(V)
Reduction Reduction Prevention
±6.5 to ±7.5
BD3473KS2
±6.5 to ±7.5
−
−
18
BD3474KS2
±6.5 to ±7.5
−
−
16
The contents specified in this document are correct as of February 1st, 2014.
[O_033] Catalog No. 02.2014 ROHM © PDF
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