Texas Instruments SLOU061A manual Sallen-Key Low-Pass Filter Wwith Dual Supply Using Area

Page 23
3.5 Sallen-KeyLow-Pass Filter
Sallen-KeyLow-Pass Filter

Figure 3–4 shows area 200 equipped with a dual operational amplifier configured as a second-order Sallen-Key low-pass filter using dual-power supplies.

Basic setup is done by proper choice of resistors R and mR, and capacitors C and nC. The transfer function is:

 

VOUT +

 

 

1

 

 

 

 

 

 

 

f ￿2 )￿j ￿￿f

 

VIN

 

 

 

 

 

1 *￿

 

 

 

 

 

￿

Where:

fo

Q

fo

 

 

 

 

 

 

 

fo +

1

 

 

 

 

2p￿m n RC

 

And

￿m n Q +m )1

Figure 3–4. Sallen-Key Low-Pass Filter Wwith Dual Supply Using Area 200

V2+

V2+

 

C206

C207

0.1 ∝ F

10 ∝ F

GND2

 

C209

C210

0.1 ∝ F

10 ∝ F

V2–

 

R221

A201–

R220

A202–

R219

A203+

mR

A204+

R217

+

R216

C215

R218

R

C211

 

 

 

R212

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Jumper

 

Vout

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

=

 

 

 

 

 

 

 

 

V2+

 

 

 

 

V

in

 

1– (f/fo)2

+ (j/Q)(f/fo)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

14

 

 

6

 

 

 

 

 

 

A2/SD

 

 

 

 

 

 

–

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A2OUT

 

 

 

 

3 +

 

 

 

 

 

 

 

 

 

 

 

4

 

U201A

 

 

 

 

 

 

 

1/2 Dual Op Amp

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V2–

 

 

 

 

 

 

 

 

 

fo =

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2π √

 

 

RC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

mn

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power Supply Bypass

V2+

R210

V2–

Vin

–

C212

R207

R215

Q =

√ mn

 

 

m+1

 

R214

A2 FLT

C213

 

 

 

 

 

C214

nC

 

 

C203

R211

VREF2

C

R204

B201–

R203

C202

R206

Jumper

9

 

B2/SD

 

R

C208

U202

B202–

R201

R205

12 –

13

B2OUT

11

 

A

R213

Voltage Reference Not Used

B203+

R202

B204+

Jumper

C204

+

U201B 1/2 Dual Op Amp

 

Not Used

R209

R208

B2 FLT

C205

C201

Example Circuits

3-5

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Page 22 Page 24
Contents User’s Guide Important Notice Related Documentation FromJTexas Instruments PrefacePage Contents Figures Introduction Power Requirements Design FeaturesEvaluation Module Layout Physical Considerations Area 100-Single Device Soic Shows the area 100 schematicArea 200-Dual Device Soic Shows the area 200 schematicArea 300-Quad Device Soic Shows the area 300 schematicArea 300 Schematic-Quad Device Soic 16 pin Maximum Power Dissipation vs Free-Air Temperature Shows component placement for the EVM board EVM Component PlacementEVM Board Layout-Top EVM Board LayoutEVM Board Layout-Bottom Example Circuits Inverting Amplifier Schematic ConventionsVREF1 +1.24 VR111R113R113 Noninverting AmplifierDifferential Amplifier Sallen-Key Low-Pass Filter Wwith Dual Supply Using Area Fo fo Sallen-Key High-Pass FilterSallen-Key High-Pass Filter With Single Supply Using Area Vout +VIN 1 2R212R220 R212R221VREF2 Two Operational Amplifier Instrumentation AmplifierArea Quad Operational Amplifier Instrumentation Amplifier Example Circuits Example Circuits

SLOU061A specifications

Texas Instruments SLOU061A is a comprehensive technical document that provides detailed information about one of the company's key offerings in the realm of integrated circuits. This document highlights important features, technologies, and characteristics of the specified device, ensuring users can make informed decisions during the design and implementation of their projects.

One of the main features of the Texas Instruments SLOU061A is its versatility in application. The device is designed to cater to a wide range of electronic systems, including consumer electronics, industrial equipment, and automotive applications. This versatility is further enhanced by its ability to operate in various environments, withstand extreme temperatures, and support different input/output configurations.

The SLOU061A incorporates advanced semiconductor technologies that facilitate improved performance and efficiency. The device is built on a state-of-the-art fabrication process, which not only enhances its reliability but also minimizes power consumption. This is crucial in today's market where energy efficiency is a significant concern for manufacturers and end-users alike. The integrated power management features allow for dynamic power scaling, helping to optimize energy usage in real-time.

In terms of communication interfaces, the SLOU061A supports several protocols, including I2C, SPI, and UART, thereby allowing seamless integration with various microcontrollers and processors. This compatibility ensures that designers can easily incorporate the device into existing systems or create new designs without the need for significant redesign efforts.

Another notable characteristic of the SLOU061A is its robust protection features. The device is equipped with built-in safeguards against overvoltage, overcurrent, and thermal events, ensuring longevity and reliability in application. This makes it an ideal choice for projects where durability is paramount.

Lastly, Texas Instruments' commitment to customer support is evident in the documentation provided alongside SLOU061A. The datasheets, application notes, and reference designs serve as valuable resources for engineers and developers, providing guidance and best practices for implementation.

In summary, Texas Instruments SLOU061A is a feature-rich integrated circuit that stands out for its versatility, efficiency, communicative capabilities, and robust protection features, making it an excellent choice for various electronic applications across multiple industries.
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