BU7242SF-E2 데이터 시트보기 (PDF) - ROHM Semiconductor

부품명

상세내역

제조사

BU7242SF-E2

Operational Amplifiers / Comparators Full Swing Low Voltage Operation CMOS Operational Amplifiers

ROHM Semiconductor 

BU7261/BU7261S family, BU7241/BU7241S family, BU7295/BU7295S family, BU7275/BU7275S family

BU7262/BU7262S family, BU7242/BU7242S family, BU7264/BU7264S family, BU7244/BU7244S family Technical Note

●Examples of circuit

○Voltage follower

VDD

Vout

Vin

VSS

Fig. 190 Voltage follower circuit

○Inverting amplifier

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

R1

Vin

R2

VDD

R1//R2

VSS

For inverting amplifier, Vin is amplified by voltage gain

decided R1 and R2, and phase reversed voltage is

outputted.

Vout is shown next formula.

Vout

Vout=-(R2/R1)・Vin

Input impedance is R1.

Fig. 191 Inverting amplifier circuit

○Non-inverting amplifier

R1

R2

VDD

Vin

VSS

Fig. 192 Non-inverting amplifier circuit

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

Vout=(1+R2/R1)・Vin

This circuit realizes high input impedance because Input

impedance is operational amplifier’s input Impedance.

www.rohm.com

© 2010 ROHM Co., Ltd. All rights reserved.

30/36

2010.12 - Rev.A

Share Link: