Datasheet TLA432 (Texas Instruments) - 9

TLA431, TLA432 www.ti.com
SNVSCR4A – JULY 2024 – REVISED OCTOBER 2024
7 Parameter Measurement Information
Input VKA IKA Vref
Figure 7-1. Test Circuit for VKA = Vref
Input VKA IKA R1 Iref R2 Vref æ R1 ö K V A = r V ef ç1 + ÷ + rIef × R1 è R2 ø
Figure 7-2. Test Circuit for VKA > Vref
Input VKA Ioff
Figure 7-3. Test Circuit for Ioff 7.1 Temperature Coefficient
The deviation of the reference voltage, Vref, over the full temperature range is known as VI(dev). The parameter of VI(dev) can be used to find the temperature coefficient of the device. The average full-range temperature coefficient of the reference input voltage, αVref, is defined as: αVref is positive or negative, depending on whether minimum Vref or maximum Vref, respectively, occurs at the lower temperature. The full-range temperature coefficient is an average and therefore any subsection of the rated operating temperature range can yield a value that is greater or less than the average. For more details on temperature coefficient, refer to the Voltage Reference Selection Basics White Paper. Copyright © 2024 Texas Instruments Incorporated Submit Document Feedback 9 Product Folder Links: TLA431 TLA432 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Device Comparison Table 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 Electrical Characteristics 6.6 Typical Characteristics 7 Parameter Measurement Information 7.1 Temperature Coefficient 7.2 Dynamic Impedance 8 Detailed Description 8.1 Overview 8.2 Functional Block Diagram 8.3 Feature Description 8.4 Device Functional Modes 8.4.1 Closed Loop 8.4.1.1 Stability (Closed Loop) 8.4.2 Open Loop (Comparator) 9 Applications and Implementation 9.1 Application Information 9.2 Typical Applications 9.2.1 Shunt Regulator/Reference 9.2.1.1 Design Requirements 9.2.1.2 Detailed Design Procedure 9.2.1.2.1 Programming Output/Cathode Voltage 9.2.1.2.2 Total Accuracy 9.2.1.2.3 Start-Up Time 9.2.1.3 Application Curve 9.2.2 Comparator With Integrated Reference 9.2.2.1 Design Requirements 9.2.2.2 Detailed Design Procedure 9.2.2.2.1 Basic Operation 9.2.2.2.1.1 Overdrive 9.2.2.2.2 Output Voltage and Logic Input Level 9.2.2.2.2.1 Input Resistance 9.2.2.3 Application Curve 9.3 System Examples 9.4 Power Supply Recommendations 9.5 Layout 9.5.1 Layout Guidelines 9.5.2 Layout Example 10 Device and Documentation Support 10.1 Device Nomenclature 10.2 Related Links 10.3 Receiving Notification of Documentation Updates 10.4 Support Resources 10.5 Trademarks 10.6 Electrostatic Discharge Caution 10.7 Glossary 11 Revision History 12 Mechanical, Packaging, and Orderable Information