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BA3131FS PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BA3131FS
기능 Dual operational amplifier with switch/ for audio use (3 inputs 1 output 2)
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BA3131FS 데이터시트, 핀배열, 회로
Standard ICs
BA3131FS
Dual operational amplifier with switch,
for audio use (3 inputs × 1 output × 2)
BA3131FS
The BA3131FS contains two built-in circuits with operational amplifiers configured of three differential input circuits, an
output circuit, and a switch circuit. The three differential input circuits are separate, enabling independent settings to be
entered for the gain and frequency characteristics.
!Applications
Car stereos, audio amplifiers and other electronic circuits
!Features
1) High gain and low distortion. (Gv = 110dB, THD = 0.0015% typ.)
2) Low noise. (Vn = 2µVrms typ.)
3) Switching circuit can be directly coupled to microcomputer port.
4) Small switching noise.
5) Equipped with 1 / 2 Vcc output circuit for single power supply.
!Block diagram
+ IN1A 1
- IN1A 2
+ IN1B 3
- IN1B 4
+ IN1C 5
- IN1C 6
OUT1 7
SW1 8
SW2 9
GND 10
– + +–
– + +–
– + +–
33
RR
20 + IN2A
19 - IN2A
18 + IN2B
17 - IN2B
16 + IN2C
15 - IN2C
14 OUT2
13 Vref OUT
12 1 / 2 VCC
11 VCC




BA3131FS pdf, 반도체, 판매, 대치품
Standard ICs
BA3131FS
!Measurement conditions (Figure 1)
Measurement Item
Input offset voltage
Input offset current
Input bias current
High-amplitude voltage gain
Common-mode signal rejection ratio
(Common-mode input voltage)
Power supply voltage
rejection ratio
VCC VR EK VF S1 S2 S3 S4 Equation
8 Vref VF1 ON ON OFF OFF 1
8 Vref VF2 OFF OFF OFF OFF 2
VF3 OFF ON
8 Vref
OFF OFF
VF4 ON OFF
3
5.5 VF5
8 Vref
ON ON ON OFF
2.5 VF6
4
8 6 8 VF7
ON ON OFF OFF 5
8 2 0 VF8
6 Vref VF9
ON ON OFF OFF
18 Vref VF10
6
!Equations
(1) Input offset voltage (Vio)
Vio = | VF1 | / (1 + Rf / Rs)
(2) Input offset current (Iio)
Iio = | VF2 - VF1 | / (Ri (1 + Rf / Rs) )
(3) Input bias current (Ib)
Ib = | VF4 - VF3 | / (2 Ri (1 + Rf / Rs) )
(4) High-amplitude voltage gain (Avol)
Avol = 20log (3 (1 + Rf / Rs) / | VF6 - VF5 | ) (dB)
(5) In-phase signal rejection ratio (CMRR)
CMRR = 20log (4 (1 + Rf / Rs) / | VF8 - VF7 | ) (dB)
(6) (In-phase input voltage range) (PSRR)
PSRR = 20log (12 (1 + Rf / Rs) / | VF10 - VF9 | ) (dB)

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BA3131FS 전자부품, 판매, 대치품
Standard ICs
!Application example
BA3131FS
IN2C
IN2B
IN2A
3.3µ
C6 3.3µ
C5
3.3µ
C4
R2 R8
47k 1k
R4
R10 R6
R12
47k 1k
47k 1k
R16
10k
R14
3.3k
20 19 18 17 16 15 14 13 12 11
Aamp: Gv = 20dB
Bamp: Gv = 10dB
Camp: Gv = 0dB
OUT2
Vcc = 8V
BA3131FS
C7 C8 C9
100µ 0.022µ 22µ
C10
100µ
123
4 5 6 7 8 9 10
IN1A
IN1B
IN1C
3.3µ
C3
3.3µ
C2
3.3µ
C1
R13
3.3k
R15
10k
R1 R7
47k 1k
R3 R9 R5 R11
47k 1k
47k 1k
SW1 SW2
µCOM.
OUT1
Fig.13

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부품번호상세설명 및 기능제조사
BA3131FS

Dual operational amplifier with switch/ for audio use (3 inputs 1 output 2)

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