R

G

R

F

R

2

R

1

C

2

V

IN

V

OUT

1

2pRC

f

=

-

3 dB

C

1

R

R = R

C

C = C

Q = Peaking factor

(Butterworth Q = 0.707)

1

1

2

2

=

=

R

(

(

R

F

2 -

1

Q

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

16

TLV316-Q1, TLV2316-Q1, TLV4316-Q1

SBOS845A – NOVEMBER 2016 – REVISED DECEMBER 2016

www.ti.com

Product Folder Links: TLV316-Q1 TLV2316-Q1 TLV4316-Q1

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Copyright © 2016, Texas Instruments Incorporated

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The TLV316-Q1, TLV2316-Q1, and TLV4316-Q1 devices are powered on when the supply is connected. The

devices can operate as a single-supply operational amplifier or a dual-supply amplifier, depending on the

application.

8.2 System Examples

When receiving low-level signals, the device often requires limiting the bandwidth of the incoming signals into the

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

amplifier, as shown in Figure 15.

Figure 15. Single-Pole, Low-Pass Filter

If even more attenuation is needed, the device requires a multiple-pole filter. The Sallen-Key filter can be used

for this task, as shown in Figure 16. For best results, the amplifier must have a bandwidth that is eight to ten

times the filter frequency bandwidth. Failure to follow this guideline can result in a phase shift of the amplifier.

Figure 16. Two-Pole, Low-Pass, Sallen-Key Filter