REF1112 10ppm/°C, 1μA, 1.25V Shunt Voltage Reference

1 Features

• Small package: SOT23-3

• Fixed reverse breakdown voltage of 1.25V

• Key specifications

– Output voltage tolerance: ±0.2% (maximum)

– Low output noise (0.1Hz to 10Hz): 25μVpp

(typical)

– Temperature range: −40°C to +125°C

– Operating current range: 1.2μA to 5mA

– Low temperature coefficient from 0°C to +70°C:

30ppm/°C (maximum)

– Low temperature coefficient from –40°C to

+85°C: 50ppm/°C (maximum)

2 Applications

• Battery-powered instruments

• Building security sensors

• Medical equipment

• Field transmitters

• Calibrators

SPACER

R

BIAS

V

S

V

OUT

I

REF

+ I

LOAD

I

REF

R

LOAD

I

LOAD

R

BIAS

=

V

S

− V

D

I

LOAD

+ I

REF

Shunt Reference Application Schematic

3 Description

The REF1112 device is a two-terminal shunt reference

designed for power and space sensitive applications.

The REF1112 features an operating current of 1μA

in a SOT23-3 package and is an improved, lower

power voltage reference for designs currently using

voltage references in larger packages, such as the

REF1004 and LT1004. The REF1112 is specified from

–40°C to +85°C with operation extending from –40°C

to +125°C.

The REF1112 complements other 1μA components

from Texas Instruments including the OPA349 and

TLV240x low-power operational amplifiers, and the

TLV349x micropower voltage comparator.

Device Information

PART NUMBER

PACKAGE (1)

BODY SIZE (NOM)

(2)

REF1112

SOT-23 (3)

2.92mm × 1.3mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

ㅤ

ㅤ

ㅤ

ㅤ

ㅤ

1

2

3

NC

SOT23

GND

V

O

A.

NC indicates the pin must be left unconnected or connected to

GND

Pinout

REF1112

SBOS283E – SEPTEMBER 2003 – REVISED DECEMBER 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.