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參數(shù)資料
| 型號： | BA3131FS |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | ER 14C 14#16 PIN PLUG |
| 中文描述： | 雙運算放大器，開關(guān)，音頻使用（3輸入1輸出】】2） |
| 文件頁數(shù)： | 8/9頁 |
| 文件大?。?/td> | 110K |
| 代理商： | BA3131FS |
BA3131FS
Standard ICs
!
Operation notes
(1) Pin 13 is the reference output pin, from which 1 / 2 Vcc is output. The value for the bypass capacitor should be
determined based on the desired characteristics. A value between 500pF and 1
μ
F may produce oscillation, so if AC
grounding is being used, always use a bypass capacitor with a value of at least 10
μ
F.
Also, Pin 12 is designated for reference circuit input, so if reference output is being used, always use a bypass capacitor
for AC grounding. (We recommend a bypass capacitor with a value of 22
μ
F.)
Reference data (these values are intended only as a reference, and performance is not guaranteed)
10
–
35
150
22
–
42
300
47
–
48
550
Ripple rejection ratio (f
IN
= 100 Hz) (dB)
Pin 12 bypass capacitor (
μ
F)
Output rise time (ms)
Test conditions: When power supply is on (V
CC
= 8V), time equal to 90% of V
CC
bypass capacitor,Pin 13 bypass
capacitor 100
μ
F, output smoothing voltage.
(2) This IC offers stability even at low gain (0 to 20dB), but a capacitance load of 200pF or higher may cause oscillation
(the phase margin at a capacitance of 200pF is 10
°
typ. (Ta = 85
°
C, 0dB point) ). Consequently, please make sure
sufficient care is taken in terms of the capacitance load.
When using a 0dB buffer, as shown in the application example (Figure 13), introducing a bias resistance of several k
to
the negative input (R11 and R12 in Figure 13, indicated as circled items) results in greater stability in terms of the
capacitance load.
!
Truth value table
H
H
Corresponds to
μ
COM output
ch1
Conditions
“
H
”
when the applied voltage at pins 8 and 9 is 2.0V or more, and
“
L
”
when it is 1.0V or less.
SW1 (8pin)
SW2 (9pin)
H
L
ch2
L
H
ch3
L
L
OFF
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