PRE

POST

6

HYST

NOM

V

V

V

10 (ppm)

V

æ

ö

-

=

×

ç

÷

ç

÷

è

ø

Time(200 s/div)

m

V

IN

V

OUT

200 s/div

m

V

OUT

-1mA

+1mA

-1mA

I

LOAD

Time(400 s/div)

m

V

IN

V

OUT

200 s/div

m

V

OUT

-5mA

+5mA

-5mA

I

LOAD

10

REF3312, REF3318, REF3320, REF3325, REF3330, REF3333

SBOS392H – AUGUST 2007 – REVISED AUGUST 2019

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Product Folder Links: REF3312 REF3318 REF3320 REF3325 REF3330 REF3333

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Copyright © 2007–2019, Texas Instruments Incorporated

Typical Characteristics (continued)

At TA = 25°C and VIN = 5 V, and REF3325 used for typical characteristic measurements (unless otherwise noted).

CLOAD = 10 μF, IOUT = 0 mA

Figure 13. Line Transient

CL = 1 μF, ±5-mA Output Pulse

Figure 14. Load Transient

CLOAD = 10 μF, IOUT = 1 mA

Figure 15. Line Transient

CL = 1 μF, ±1-mA Output Pulse

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:

where

•

VHYST = thermal hysteresis (in units of ppm).

•

VNOM = the specified output voltage.

•

VPRE = output voltage measured at 25°C pretemperature cycling.

•

VPOST = 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)