2

REF3425, REF3430, REF3433, REF3440, REF3450

SBAS804B – SEPTEMBER 2017 – REVISED MARCH 2018

www.ti.com

Product Folder Links: REF3425 REF3430 REF3433 REF3440 REF3450

Submit Documentation Feedback

Copyright © 2017–2018, Texas Instruments Incorporated

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

Community 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 A (December 2017) to Revision B

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

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

•

Changed TEST CONDITION for Output voltage accuracy row under ACCURACY AND DRIFT in Electrical

•

Added "at 35°C" to TEST CONDITION and and change "30 ppm" to "25 ppm" for Long-term stability row under

HYSTERESIS AND LONG-TERM STABILITY in Electrical Characteristics; add separate row for 1000 - 2000 hours

at 35°C under same................................................................................................................................................................ 5

•

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 25 in Long-Term Stability ............................................... 12

•

Changed "(as shown in Figure 26)" to " as shown in Figure 28 in last paragraph of 4-Wire Kelvin Connections .............. 18

Changes from Original (September 2017) to Revision A

Page

•

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