BA3131 Ver la hoja de datos (PDF) - ROHM Semiconductor

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componentes Descripción

Fabricante

BA3131

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

ROHM Semiconductor 

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 3

VF4 ON OFF

5.5 VF5

8 Vref

ON ON ON OFF 4

2.5 VF6

8

6

8 VF7

ON ON OFF OFF 5

8

2

0 VF8

6 Vref — VF9

ON ON OFF OFF 6

18 Vref — VF10

!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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