BA4558RFVT datasheet(23/29 Pages) ROHM

23 / 29 page

Datasheet

www.rohm.com

TSZ02201-0RAR1G200010-1-2

23/26

4.SEP.2012 Rev.003

TSZ22111･15･00

BA4558xxx, BA4558Rxxx

Examples of circuit

○Voltage follower

○Inverting amplifier

○Non-inverting amplifier

Fig. 52 Voltage follower circuit

Fig. 53 Inverting amplifier circuit

Fig. 54 Non-inverting amplifier circuit

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, Vi(b) Derating curve voltage

gain decided R1 and R2, and phase reversed voltage

is outputted.

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

operational

amplifier’s

input

Impedance.

VEE

Vout

Vin

VCC

VEE

R1//R2

Vin

Vout

VCC

VEE

VCC

Vin

Vout

BA4558RFVT Datenblatt(PDF) 23 Page - Rohm

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