BD3870FS-E2 Rohm Semiconductor, BD3870FS-E2 Datasheet - Page 9
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BD3870FS-E2
Manufacturer Part Number
BD3870FS-E2
Description
IC SOUND PROCESSOR SSOP-A24
Manufacturer
Rohm Semiconductor
Series
-r
Type
Audio Processorr
Datasheet
1.BD3870FS-E2.pdf
(16 pages)
Specifications of BD3870FS-E2
Applications
Audio Systems
Mounting Type
Surface Mount
Package / Case
24-SOP
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
BD3870FS-E2
Manufacturer:
ROHM/罗姆
Quantity:
20 000
●Description of operations
BD3870FS,BD3871FS,BD3872FS,BD3873FS
© 2010 ROHM Co., Ltd. All rights reserved.
www.rohm.com
1) Bass filter
Using external components, center frequencies and Q factors of the bass characteristics are flexible
Standard values of R3, R4 (reference)
(R1=5.6kΩ, R2=390kΩ, C1=C2=0.1µF)
* The actual boost cut amount may deviate from the standard values in some degree.
Bass Boost Cut Amount
IN
10dB
12dB
14dB
0dB
2dB
4dB
6dB
8dB
C1
R3
Fig.5
R2
R1
+
-
R4
C2
Resistance (kΩ) * Typ.
77.64
58.90
44.02
32.20
22.82
15.36
9.44
4.78
R3
18.73
33.60
45.42
54.80
62.26
68.18
72.84
R4
0
9/15
f
0
Q
G(boost)
G
2 π
cut
R1
R2
R1R2R4C1C2
G
R1R2
C1
20log
20log
R3
R2
C2
R3
1
R4
R1
R1
R3
R1
R1
R2(R3
R2
R2
R4
R2
R2
R2
R2R3
R4
Fig.6
R3
R3
C1C2
R3
R2R3
F0
R3
R3
R4
R4
R4
R4
(Hz)
R4
R4
Technical Note
2010.10 - Rev.A
C2
C2
C1
C1
C2
C2
C1
C1
1
1
( dB)
1
1
G
G
(dB)
f