REF3312_16 Datasheet, PDF (10/35 Pages) Texas Instruments – SC70-3, SOT-23-3, and UQFN-8, 30-ppm Drift Voltage Reference

REF3312, REF3318, REF3320, REF3325, REF3330, REF3333
SBOS392F – AUGUST 2007 – REVISED NOVEMBER 2016
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Typical Characteristics (continued)
At T_A = 25°C and V_IN = 5 V, and REF3325 used for typical characteristic measurements (unless otherwise noted).
+5mA
V_IN
-5mA
-5mA
I_LOAD
V_OUT
V_OUT
Time (400ms/div)
C_LOAD = 10 μF, I_OUT = 0 mA
Figure 13. Line Transient
V_IN
V_OUT
200ms/div
C_L = 1 μF, ±5-mA Output Pulse
Figure 14. Load Transient
+1mA
-1mA
I_LOAD
-1mA
V_OUT
Time (200ms/div)
C_LOAD = 10 μF, I_OUT = 1 mA
200ms/div
C_L = 1 μF, ±1-mA Output Pulse
Figure 15. Line Transient
Figure 16. Load Transient
8 Parameter Measurement Information
8.1 Thermal Hysteresis
Thermal hysteresis for the REF33xx is defined as the change in output voltage after operating the device at
25°C, cycling the device through the specified temperature range, and returning to 25°C. It can be expressed as
Equation 1:
V_HYST
=
æ
ççè
V_PRE - V_POST
V_NOM
ö
÷÷ø ^{× 106}
(ppm)
where
•
•
•
•
V_HYST = thermal hysteresis (in units of ppm).
V_NOM = the specified output voltage.
V_PRE = output voltage measured at 25°C pretemperature cycling.
V_POST = output voltage measured after the device cycles from 25°C through the specified temperature range of
–40°C to 125°C and returns to 25°C.
(1)
10
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