REF4132-Q1

+

±

OPA735

+5 V

+5 V

-5 V

-2.5 V

+2.5 V

EN

VIN

VREF

GND

N/C

10 NŸ

10 NŸ

J

A

D

JA

T

T

P

R

T

u

REF(MAX)

REF(MIN)

6

REF

V

V

Drift =

10

V

Temperature Range

·

§

u

¸

¨

u

©

¹

14

REF4132-Q1

SNAS795A – FEBRUARY 2020 – REVISED JULY 2020

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Product Folder Links: REF4132-Q1

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Copyright © 2020, Texas Instruments Incorporated

Feature Description (continued)

9.3.2 Low Temperature Drift

The REF4132-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:

(3)

9.3.3 Load Current

device are protected from short circuits by limiting the output short-circuit current to 18 mA. The device

temperature increases according to Equation 4:

where

•

•

•

•

(4)

The REF4132-Q1 maximum junction temperature must not exceed the absolute maximum rating of 150°C.

9.4 Device Functional Modes

9.4.1

EN Pin

When the EN pin of the REF4132-Q1 is pulled high, the device is in active mode. The device must be in active

mode for normal operation. The REF4132-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 2.5 µA (typical) in shutdown mode. The EN pin must not be pulled higher than VIN supply

voltage. See the Thermal Information for logic high and logic low voltage levels.

9.4.2 Negative Reference Voltage

For applications requiring a negative and positive reference voltage, the REF4132-Q1 and OPA735 can be used

to provide a dual-supply reference from a 5-V supply. Figure 27 shows the REF4132-Q1 used to provide a 2.5-V

supply reference voltage. The low drift performance of the REF4132-Q1 complements the low offset voltage and

zero drift of the OPA735 to provide an accurate solution for split-supply applications. Take care to match the

temperature coefficients of R1 and R2.

Figure 27. REF4132-Q1 and OPA735 Create Positive and Negative Reference Voltages