bh3856fs ROHM Co. Ltd., bh3856fs Datasheet - Page 13

• Manufacturer Part Number: bh3856fs
• Description: 2-wire Serial Sound Control Ic
• Manufacturer: ROHM Co. Ltd.

Audio ICs
    Operation notes
(1) Operating power supply voltage range
As long as the operating power supply voltage and ambient temperature are kept within the specified range, the basic
circuits are guaranteed to function, but be sure to check the constants as well as the element settings, voltage settings,
and temperature settings.
(2) Bass filter
∗
(theoretical equation)
IC internal BIAS
B.P.F. composed of multiple feedback active f
f
G =
(When R
f
(
0
0
1
2
=
=
Vcc
2π
5kΩ
R1
5.1kΩ
R
1
1.0 × 10
)
2
×
1
C
× 1 +
= 5.1kΩ, R
BIN
R
−5
1
R
2
1
C
C
C
1
2
1
C
Q
2
0.1µF
0.1µF
2
C1
C2
= 50kΩ, C
−1
1.57
1
2
BVO
BVN
IC internal BIAS
1
G = 5.0
(
Q
= C
Note : Filter gain is calculated using the equation on the left. Total output
1
2
Vcc
2
R2
50kΩ
)
= C)
gain is the sum of the gain for each of the internal circuits.
−
R
2
0
C
1
can be varied according to the value of C.BIN
1
C
2
1
2
× (C
1
+ C
−3dB
2
)
−1
BH3856S / BH3856FS
∆f
f
0
Frequency f: (Hz)