Table of Contents

1 Features............................................................................1

2 Applications..................................................................... 1

3 Description.......................................................................1

4 Revision History.............................................................. 2

5 Device Comparison Table...............................................3

6 Pin Configuration and Functions...................................3

7 Specifications.................................................................. 4

7.1 Absolute Maximum Ratings ....................................... 4

7.2 ESD Ratings .............................................................. 4

7.3 Recommended Operating Conditions ........................4

7.4 Thermal Information ...................................................4

7.5 Electrical Characteristics ............................................5

7.6 Typical Characteristics................................................ 7

8 Parameter Measurement Information.......................... 11

8.1 Solder Heat Shift....................................................... 11

8.2 Long-Term Stability................................................... 12

8.3 Thermal Hysteresis................................................... 12

8.4 Power Dissipation..................................................... 13

8.5 Noise Performance................................................... 14

9 Detailed Description......................................................15

9.1 Overview................................................................... 15

9.2 Functional Block Diagram......................................... 15

9.3 Feature Description...................................................15

9.4 Device Functional Modes..........................................16

10 Application and Implementation................................ 17

10.1 Application Information........................................... 17

10.2 Typical Application: Basic Voltage Reference

Connection.................................................................. 17

11 Power Supply Recommendations..............................19

12 Layout...........................................................................20

12.1 Layout Guidelines................................................... 20

12.2 Layout Example...................................................... 20

13 Device and Documentation Support..........................21

13.1 Documentation Support.......................................... 21

13.2 Receiving Notification of Documentation Updates..21

13.3 Support Resources................................................. 21

13.4 Trademarks.............................................................21

13.5 Electrostatic Discharge Caution..............................21

13.6 Glossary..................................................................21

14 Mechanical, Packaging, and Orderable

Information.................................................................... 21

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision B (March 2018) to Revision C (February 2021)

Page

• Added "Device Information" to include REF34xxT............................................................................................. 1

• Added hyperlinks to "Applications"..................................................................................................................... 1

• Added REF34xxT to "Device Comparison Table"...............................................................................................3

• Added REF34xxT to "Pin Configuration and Functions".....................................................................................3

• Added Configuration Information to "Electrical Characteristics”......................................................................... 4

• Changed ABS MAX IN MIN to "-0.3V"................................................................................................................4

• Added REF34xxT to "Layout Guidelines" and "Layout Example".....................................................................20

Changes from Revision A (December 2017) to Revision B (March 2018)

Page

• Added 2 new GPNS: REF3440 and REF3450 .................................................................................................. 1

• Changed "Excellent Long-Term Stability 30 ppm/1000 hrs" to "Excellent Long-Term Stability 25 ppm/1000

hrs" in Section 1 .................................................................................................................................................1

• Changed "...typical drift value for the REF34xx is 30 ppm from 0 to 1000 hours" to "...typical drift value for the

REF34xx is 25 ppm from 0 to 1000 hours" and changed Figure 8-3 in Section 8.2 ........................................ 12

• Changed "(as shown in Figure 26)" to " as shown in Figure 9-1 in last paragraph of Section 10.2.2.2 ..........18

Changes from Revision * (September 2017) to Revision A (December 2017)

Page

• Added production release of 2 new output voltage option devices, REF3430 and REF3433............................ 1

REF3425, REF3430, REF3433, REF3440, REF3450

SBAS804C – SEPTEMBER 2017 – REVISED FEBRUARY 2021

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