The tracking accuracy is as shown in Figure 9-1.

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

±75

±50

±25

0

25

50

75

100

125

150

Temperature (ƒC)

C001

V

BIAS

9.3.2 Low Temperature Drift

The REF20xx-Q1 is designed for minimal drift error, which is defined as the change in output voltage over

temperature. The drift is calculated using the box method, as described by Equation 3:

REF(MAX)

REF(MIN)

6

REF

V

V

Drift

10

(ppm)

V

Temperature Range

§

·

x

¨

¸

x

©

¹

(3)

9.3.3 Load Current

outputs of the device are protected from short circuits by limiting the output short-circuit current to 50 mA. The

device temperature increases according to Equation 4:

‡

J

A

D

-$

T

T

P

R

(4)

where

The REF20xx-Q1 maximum junction temperature must not exceed the absolute maximum rating of 150°C.

9.4 Device Functional Modes

When the EN pin of the REF20xx-Q1 is pulled high, the device is in active mode. The device must be in active

mode for normal operation. The REF20xx-Q1 can be placed in a low-power mode by pulling the ENABLE pin

low. When in shutdown mode, the output of the device becomes high impedance and the quiescent current of

the device reduces to 5 µA in shutdown mode. See the Section 7.5 for logic high and logic low voltage levels.

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REF20-Q1

SBOSA80 – DECEMBER 2021

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