AD5686R datasheet(26/32 Pages) AD

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AD5696R/AD5695R/AD5694R

Data Sheet

Rev. 0 | Page 26 of 32

THERMAL HYSTERESIS

Thermal hysteresis is the voltage difference induced on the

reference voltage by sweeping the temperature from ambient

to cold, to hot and then back to ambient.

Thermal hysteresis data is shown in Figure 57. It is measured by

sweeping temperature from ambient to −40°C, then to +105°C,

and returning to ambient. The VREF delta is then measured

between the two ambient measurements and shown in blue

in Figure 57. The same temperature sweep and measurements

were immediately repeated and the results are shown in red in

Figure 57.

Figure 57. Thermal Hysteresis

Table 15. 24-Bit Input Shift Register Contents for Internal Reference Setup Command1

DB23

(MSB)

DB22

DB21

DB20

DB19

DB18

DB17

DB16

DB15 to DB1

DB0 (LSB)

1/0

Command bits (C3 to C0)

Address bits (A2 to A0)

Don’t care

Reference setup register

1 X = don’t care.

–50

–100

–150

–200

DISTORTION (ppm)

FIRST TEMPERATURE SWEEP

SUBSEQUENT TEMPERATURE SWEEPS

AD5686R Datasheet(PDF) 26 Page - Analog Devices