R

G

R

F

R

1

C

1

V

IN

V

OUT

= 1 +

V

V

OUT

IN

R

R

F

G

1

1 + sR C

1

1

(

((

(

1

2pR C

1

1

f

=

-

3 dB

Time

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

Input

Output

F

V

I

R

A

R

17

TLV314, TLV2314, TLV4314

www.ti.com

SBOS754A – MARCH 2016 – REVISED MARCH 2016

Product Folder Links: TLV314 TLV2314 TLV4314

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Copyright © 2016, Texas Instruments Incorporated

Typical Application (continued)

When the desired gain is determined, choose a value for RI or RF. Choosing a value in the kilo ohm range is

desirable for general-purpose applications because the amplifier circuit uses currents in the milliamp range. This

milliamp current range ensures the device does not draw too much current. The trade-off is that very large

resistors (100s of kilo ohms) draw the smallest current but generate the highest noise. Very small resistors (100s

of ohms) generate low noise but draw high current. This example uses 10 k

Ω for RI, meaning 36 kΩ is used for

RF. These values are determined by Equation 3:

(3)

9.2.3 Application Curve

Figure 16. Inverting Amplifier Input and Output

9.3 System Examples

When receiving low-level signals, limiting the bandwidth of the incoming signals into the system is often required.

The simplest way to establish this limited bandwidth is to place an RC filter at the noninverting terminal of the

amplifier, as Figure 17 shows.

Figure 17. Single-Pole, Low-Pass Filter