REF3112_16 Datasheet, PDF (12/26 Pages) Texas Instruments – SOT-23 Series Voltage Reference

REF3112, REF3120, REF3125
REF3130, REF3133, REF3140
SBVS046D – DECEMBER 2003 – REVISED MARCH 2016
www.ti.com
Feature Description (continued)
8.3.5 Long-Term Stability
Long-term stability refers to the change of the output voltage of a reference over a period of months or years.
This effect lessens as time progresses, as is shown by the long-term stability curves. The typical drift value for
the REF31xx is 70 ppm from 0 to 1000 hours. This parameter is characterized by measuring 30 units at regular
intervals for a period of 1000 hours.
20
0
-20
-40
-60
-80
-100
-120
0
100 200 300 400 500 600 700 800 900 1000
Time (Hrs)
Figure 22. REF3112 Long-Term Stability
8.3.6 Load Regulation
Load regulation is defined as the change in output voltage due to changes in load current. The load regulation of
the REF31xx is measured using force and sense contacts as pictured in Figure 23. The force and sense lines
reduce the impact of contact and trace resistance, resulting in accurate measurement of the load regulation
contributed solely by the REF31xx. For applications requiring improved load regulation, force and sense lines
must be used.
Sense Line
+
V_OUT
-
Output Pin
Contact and
Trace Resistance
Force Line
I_L
Meter
Load
Figure 23. Accurate Load Regulation of REF31xx
12
Submit Documentation Feedback
Copyright © 2003–2016, Texas Instruments Incorporated
Product Folder Links: REF3112 REF3120 REF3125 REF3130 REF3133 REF3140