Table of Contents

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

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

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

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

5 Device Comparison Table...............................................4

6 Pin Configuration and Functions...................................5

7 Specifications.................................................................. 6

7.1 Absolute Maximum Ratings ....................................... 6

7.2 ESD Ratings .............................................................. 6

7.3 Recommended Operating Conditions ........................6

7.4 Thermal Information ...................................................6

7.5 REF7012 Electrical Characteristics ........................... 7

7.6 REF7025 Electrical Characteristics ........................... 8

7.7 REF7040 Electrical Characteristics ........................... 9

7.8 REF7050 Electrical Characteristics ..........................11

7.9 Typical Characteristics.............................................. 13

8 Parameter Measurement Information.......................... 17

8.1 Solder Heat Shift.......................................................17

8.2 Long-Term Stability................................................... 18

8.3 Thermal Hysteresis................................................... 18

8.4 Noise Performance................................................... 19

8.5 Temperature Drift...................................................... 21

8.6 Power Dissipation..................................................... 21

9 Detailed Description......................................................23

9.1 Overview................................................................... 23

9.2 Functional Block Diagram......................................... 23

9.3 Feature Description...................................................23

9.4 Device Functional Modes..........................................23

10 Application and Implementation................................ 25

10.1 Application Information........................................... 25

10.2 Typical Applications................................................ 25

11 Power Supply Recommendation................................30

12 Layout...........................................................................31

12.1 Layout Guidelines................................................... 31

12.2 Layout Example...................................................... 31

13 Device and Documentation Support..........................32

13.1 Documentation Support.......................................... 32

13.2 Receiving Notification of Documentation Updates..32

13.3 Support Resources................................................. 32

13.4 Trademarks.............................................................32

13.5 Electrostatic Discharge Caution..............................32

13.6 Glossary..................................................................32

14 Mechanical, Packaging, and Orderable

Information.................................................................... 32

4 Revision History

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

Changes from Revision B (April 2021) to Revision C (September 2021)

Page

• Add 1.25 V variant to Features on page1........................................................................................................... 1

• In the Device Comparison Table, added the 1.25V variant and added foot notes to indicate which devices are

released vs pre-production ................................................................................................................................ 4

• Changed Dropout voltage to min VIN = 2.75 V for VOUT < 2.5 V. .................................................................... 6

• Added Electrical Characteristics table for REF7012 (Product Preview)............................................................. 7

• Added Electrical Characteristics table for REF7040 (Product Preview)............................................................. 9

• Added Electrical Characteristics table for REF7050 (Product Preview)............................................................11

• Added to the notes above the Typical Characteristics plots, Vref = 2.5 V to the default conditions................. 13

• Under Temperature Drift section of the Parameter Measurement Information, corrected the figure from Long

Term Drift plot to Temperature Drift...................................................................................................................21

Changes from Revision A (December 2020) to Revision B (April 2021)

Page

• Changed REF7025 to more general REF70 series in heading and device information. Added ADC companion

products.............................................................................................................................................................. 1

• Changed Figures 7-2 and 7-20, Long-Term Stability (First 1000 Hours), to longer duration (2000 hours).......13

• Corrected typical shift from 0.021% to 0.009%.................................................................................................17

• Changed Figure 8-3, Long-Term Stability LCCC -1000 hours), to longer duration (2000 hours)..................... 18

• Corrected Figure 8-5, Thermal Hysteresis Distribution Cycle 2 (-40°C to 125°C), data and title..................... 18

• Reordered figures and paragraphs for better flow............................................................................................ 20

• Added missing supply bypass capacitor value (10-μF).................................................................................... 23

• Clarified piezoelectric contribution to noise and added links to resources....................................................... 26

• Added clarification on how to connect OUTF and OUTS in specific load current condition............................. 27

• Corrected part numbers and added links in Table 10-2, Reference Op Amp Options .....................................28

REF70

SNAS781C – OCTOBER 2020 – REVISED SEPTEMBER 2021

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