BU7241G ROHM [Rohm], BU7241G Datasheet - Page 26

• Manufacturer Part Number: BU7241G
• Description: Low Voltage Operation CMOS Operational Amplifiers
• Manufacturer: ROHM [Rohm]

BU7261G,BU7261SG,BU7241G,BU7241SG,BU7262F/FVM,BU7262SF/FVM,BU7242F/FVM,BU7242SF/FVM
BU7461G,BU7461SG,BU7441G,BU7441SG,BU7462F/FVM,BU7462SF/FVM,BU7442F/FVM,BU7442SF/FVM
●Examples of circuit
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Vin
○Voltage follower
○Inverting amplifier
○Non-inverting amplifier
Vin
Vin
R1
R1
R1//R2
VDD
VSS
R2
R2
VDD
VSS
VDD
VSS
Vout
26/32
Vout
Vout
Voltage gain is 0 [dB].
This circuit controls output voltage (Vout) equal
input voltage (Vin), and keeps Vout with stable
because of high input impedance and low output
impedance.
Vout is shown next formula.
Vout=Vin
For inverting amplifier, Vin is amplified by voltage
gain decided R1 and R2, and phase reversed
voltage is outputed.
Vout is shown next formula.
Vout=-(R2/R1)・Vin
Input impedance is R1.
For non-inverting amplifier, Vin is amplified by
voltage gain decided R1 and R2, and phase is
same with Vin.
Vout is shown next formula.
Vout=(1+R2/R1)・Vin
This circuit realizes high input impedance because
Input impedance is operational amplifier’s input
Impedance.
Technical Note
2009.05 - Rev.A