Support software
CIRCUIT060054
Low-pass Sallen-Key filter circuit
CIRCUIT060054
Overview
The Butterworth Sallen-Key low-pass filter is a second-order active filter. Vref provides a DC offset to accommodate for single-supply applications. A Sallen-Key filter is usually preferred when small Q factor is desired, noise rejection is prioritized and when a non-inverting gain of the filter stage is required. The Butterworth topology provides a maximally flat gain in the pass band.
Features
- Input: Vi = -2.45V to 2.45 V
- Output: Vo = 0.05 V to 4.95 V
- Supply:
- Vcc = 5 V
- Vee = 0 V
- Gain: 1 V/V
- Cutoff frequency: 10 kHz
- Vref = 2.5 V
Get started
- Read the circuit design
- Read the application report
- Download the model
Downloads
Supported products & hardware
General-purpose op amps
Precision op amps (Vos<1mV)
Technical documentation
= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 6
| Type | Title | Date | |
|---|---|---|---|
| * | Circuit design | Single-supply, 2nd-order, Sallen-Key low-pass filter circuit | Jun. 28, 2021 |
| * | Application note | Active Low-Pass Filter Design (Rev. B) | Sep. 13, 2002 |
| Application note | AN-31 Amplifier Circuit Collection (Rev. D) | Oct. 21, 2020 | |
| Application note | FilterPro™ MFB and Sallen-Key Low-Pass Filter Design Program User Guide (Rev. C) | Feb. 25, 2011 | |
| Application note | Basic Introduction to Filters - Active, Passive, and Switched-Cap (Rev. A) | Apr. 21, 2010 | |
| Application note | Analysis of the Sallen-Key Architecture (Rev. B) | Sep. 13, 2002 |
Related design resources
Design tools & simulation
SIMULATION TOOL
CALCULATION TOOL
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.