BA4580RFVT datasheet(30/43 Pages) ROHM

30 / 43 page

Datasheet

www.rohm.com

TSZ02201-0RAR1G200030-1-2

30/40

20.Nov.2014 Rev.003

TSZ22111･15･00

BA4580Rxxx BA4584FV BA4584Rxx

Application Examples

○

Voltage Follower

○

Inverting Amplifier

○

Non-inverting Amplifier

Figure 74. Voltage Follower Circuit

Figure 75. Inverting Amplifier Circuit

Figure 76. Non-inverting Amplifier Circuit

Voltage gain is 0dB.

Using this circuit, the output voltage (OUT) is

configured to be equal to the input voltage (IN). This

circuit also stabilizes the output voltage (OUT) due to

high input impedance and low output impedance.

Computation for output voltage (OUT) is shown below.

OUT=IN

For inverting amplifier, input voltage (IN) is amplified

by a voltage gain and depends on the ratio of R1 and

R2. The out-of-phase output voltage is shown in the

next expression

OUT=-(R2/R1)・IN

This circuit has input impedance equal to R1.

For non-inverting amplifier, input voltage (IN) is

amplified by a voltage gain, which depends on the ratio

of R1 and R2. The output voltage (OUT) is in-phase

with the input voltage (IN) and is shown in the next

expression.

OUT=(1 + R2/R1)・IN

Effectively, this circuit has high input impedance since

its input side is the same as that of the operational

amplifier.

VEE

OUT

VCC

VEE

R1//R2

OUT

VCC

VEE

VCC

OUT

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