ba3131fs ROHM Co. Ltd., ba3131fs Datasheet - Page 4

• Manufacturer Part Number: ba3131fs
• Description: Dual Operational Amplifier With Switch, For Audio Use
• Manufacturer: ROHM Co. Ltd.

Measurement conditions (Figure 6)
Equations
Measurement circuits
(1) Input offset voltage (Vio)
(2) Input offset current (Iio)
(3) Input bias current (Ib)
(4) High-amplitude voltage gain (Avol)
(5) In-phase signal rejection ratio (CMRR)
(6) In-phase input voltage range (PSRR)
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
Vio = | VF1 | / (1 + Rf / Rs)
Iio = | VF2 - VF1 | / (Ri (1 + Rf / Rs) )
Ib = | VF4 - VF3 | / (2 Ri (1 + Rf / Rs) )
Avol = 20log (3 (1 + Rf / Rs) / | VF6 - VF5 | ) (dB)
CMRR = 20log (4 (1 + Rf / Rs) / | VF8 - VF7 | ) (dB)
PSRR = 20log (12 (1 + Rf / Rs) / | VF10 - VF9 | ) (dB)
Fig.9 Maximum output voltage: Low
Measurement Item
Fig.7 Iq
Vcc
18
8
8
8
8
8
8
6
Vref
Vref
Vref
Vref
Vref
Vref
VR
6
2
EK
5.5
2.5
－
－
－
－
－
8
0
4/8
VF10
VF1
VF2
VF3
VF4
VF5
VF6
VF7
VF8
VF9
VF
OFF
OFF
ON
ON
ON
ON
ON
S1
Fig.8 Maximum output voltage: High
Fig.10 Slew rate ( I )
OFF
OFF
ON
ON
ON
ON
ON
S2
OFF
OFF
OFF
OFF
OFF
ON
S3
OFF
OFF
OFF
OFF
OFF
OFF
S4
Equation
1
2
3
4
5
6