ba3570fs ROHM Co. Ltd., ba3570fs Datasheet - Page 6

• Manufacturer Part Number: ba3570fs
• Description: Als Headphone Driver
• Manufacturer: ROHM Co. Ltd.

HPF cutoff
frequency 2
Amp D gain :
Furthermore, as R
G
The total gain G
and the total gain G
3) Combined frequency characteristics
As shown in Fig. 6, the ALS characteristics can be ob-
tained from the bass characteristics (Fig. 4) and the
treble characteristics (Fig. 6).
(2)
The signal circuit when ALS is off is shown in Fig. 7.
The gain and cutoff frequency of each block is as follows:
ATT2 attenuation:
G
G
Audio ICs
V(D)
H1
H2
= 20log
= 20log
= +9.5 (dB)
ALS OFF
:
R
R
G
f
CH2
R
8
6
H1
+R
V(D)
/ / R
9
R
14
for the frequency band ftf
=
G
9
H2
9
= 20log
= 2R
V(ATT2)
8
2
for the frequency band f
+R
+9.5+15
S
9
(R
13
= 20log
,
6
+9.5+15
R
8
+R
R
R
8
8
R
+R
13
R
10
+R
+R
13
R
9
17
6
R
14
+R
R
18
10
)
18
S
C
10
CH1
CH2
is
tf is
(Hz)
(dB)
(dB)
(dB)
(dB)
Amp D’ gain:
As R
is off is
G
and it is flat as shown in Fig. 8.
V (OFF)
17
= R
= G
18
*6
V (ATT2)
and R
G
V(D)
+G
19
= 20log
V (D)
= R
)6
20
+G
BA3570F / BA3570FS
, the total gain G
V (MUTE)
0
R
19
R
+R
+G
19
15
20
V (E)
= 15
V(OFF)
when ALS
(dB)
559
(dB)