120

100

80

60

40

20

0

-15

-10

-5

0

5

10

15

Load Current (mA)

ADS7822

V

CC

CS

D

OUT

DCLOCK

V

REF

+In

-In

GND

+

+

5W

1 F to 10 F

m

m

1 F to

m

10 F

m

3.3V

0.1 F

m

V

IN

V+

V

S

Microcontroller

REF3133

GND

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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.

REF3112, REF3120, REF3125

REF3130, REF3133, REF3140

SBVS046D – DECEMBER 2003 – REVISED MARCH 2016

REF31xx 15ppm/°C Maximum, 100-µA, SOT-23 Series Voltage Reference

1

1 Features

1

•

MicroSize Package: SOT23-3

•

Low Dropout: 5 mV

•

High Output Current: ±10 mA

•

High Accuracy: 0.2% Maximum

•

Low IQ: 115 µA Maximum

•

Excellent Specified Drift Performance:

–

15 ppm/°C (Maximum) from 0°C to +70°C

–

20 ppm/°C (Maximum) from –40°C to +125°C

2 Applications

•

Portable, Battery-Powered Equipment

•

Data Acquisition Systems

•

Medical Equipment

•

Hand-Held Test Equipment

3 Description

The REF31xx is a family of precision, low power, low

dropout, series voltage references available in the

tiny 3-pin SOT-23 package.

The

REF31xx's

small

size

and

low

power

consumption (100

μA typical) make it ideal for

portable

and

battery-powered

applications.

The

REF31xx does not require a load capacitor, but is

stable with any capacitive load and can sink or

source up to 10 mA of output current.

Unloaded, the REF31xx can operate on supplies

down to 5 mV above the output voltage. All models

are specified for the wide temperature range of –40°C

to +125°C.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

REF31xx

SOT-23 (3)

2.92 mm × 1.30 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Typical Application

Dropout Voltage vs Load Current