Datasheet REF35 (Texas Instruments) - 9

REF35 www.ti.com
SNAS809C – DECEMBER 2021 – REVISED SEPTEMBER 2024
6.7 Typical Characteristics (continued)
at TA = 25°C, VIN = VEN = VREF + 0.3V, IL = 0mA, CL = 10µF, CIN = 0.1µF (unless otherwise noted) 500 VREF = 2.5V VREF = 4.096V VREF = 3V 300 ) 100 rift (ppm D -100 -300 -500 -40 0 40 80 120 Te mperature (C) WCSP Package VREF < 2.5V (-40ºC to 85ºC) WCSP Package VREF ≥ 2.5V (-40ºC to 85ºC)
Figure 6-7. Temperature Coefficient Distribution Figure 6-8. Output Voltage Drift vs Free-Air Temperature
5,000 50 VREF = 2.5V VREF = 4.096V VREF = 3V 3,800 40 ) 2,600 30 rift (ppm D 1,400 opulation (% 20 P 200 10 -1,000 -40 -7 26 59 92 125 Te mperature C) 0 0 1 2 3 4 5 6 7 8 9 10 WCSP Package VREF ≥ 2.5V (-40ºC to 125ºC) Te mperature Coefficient (ppm/C)
Figure 6-9. Output Voltage Drift vs Free-Air Temperature
WCSP Package VREF ≥ 2.5V (-40ºC to 85ºC)
Figure 6-10. Temperature Coefficient Distribution
60 40 CL = 10uF CL = 1uF 48 32 36 24 ation (%) ation (%) 24 16 Popul Popul 12 8 0 0 -0.05 -0.03 -0.01 0.01 0.03 0.05 1.2 2 2.8 3.6 4.4 5.2 6 6.8 7.6 8.4 9.2 10 10.8 Initial Accuracy (%) Noise Bin (ppmp-p)
Figure 6-11. Initial Accuracy Distribution Figure 6-12. 0.1Hz to 10Hz Noise Distribution (VREF = 1.25V, CNR = Open, IL = 0mA)
Copyright © 2024 Texas Instruments Incorporated Submit Document Feedback 9 Product Folder Links: REF35 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Device Comparison 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 Electrical Characteristics YBH package 6.7 Typical Characteristics 7 Parameter Measurement Information 7.1 Solder Heat Shift 7.2 Temperature Coefficient 7.3 Long-Term Stability 7.4 Thermal Hysteresis 7.5 Noise Performance 7.5.1 Low-Frequency (1/f) Noise 7.5.2 Broadband Noise 7.6 Power Dissipation 8 Detailed Description 8.1 Overview 8.2 Functional Block Diagram 8.3 Feature Description 8.3.1 Supply Voltage 8.3.2 EN Pin 8.3.3 NR Pin 8.4 Device Functional Modes 8.4.1 Basic Connections 8.4.2 Start-Up 8.4.3 Output Transient Behavior 9 Application and Implementation 9.1 Application Information 9.2 Typical Applications 9.2.1 Negative Reference Voltage 9.2.2 Precision Power Supply and Reference 9.2.2.1 Design Requirements 9.2.2.2 Detailed Design Procedure 9.2.2.2.1 Selection of Reference 9.2.2.2.2 Input and Output Capacitors 9.2.2.2.3 Selection of ADC 9.2.2.3 Application Curves 9.3 Power Supply Recommendations 9.4 Layout 9.4.1 Layout Guidelines 9.4.2 Layout Examples 10 Device and Documentation Support 10.1 Documentation Support 10.1.1 Related Documentation 10.2 Receiving Notification of Documentation Updates 10.3 Support Resources 10.4 Trademarks 10.5 Electrostatic Discharge Caution 10.6 Glossary 11 Revision History 12 Mechanical, Packaging, and Orderable Information