REF34xx Low-Drift, Low-Power, Small-Footprint Series Voltage Reference

1 Features

• Initial accuracy: ±0.05% (maximum)

• Temperature coefficient : 6 ppm/°C (maximum)

• Operating temperature range: −40°C to +125°C

• Output current: ±10 mA

• Low quiescent current: 95 μA (maximum)

• Wide input voltage: 12 V

• Excellent long-term stability 25 ppm/1000 hrs

• Multiple small footprint 6SOT-23 package pinouts:

REF34xx and REF34xxT

2 Applications

• Data acquisition systems

• Analog I/O modules

• Field transmitters

• Lab & field instrumentation

• Battery test equipment

• DC power supply, AC source, electronic load

• Digital multimeters

3 Description

The REF34xx device is a low temperature drift

(6 ppm/°C), low-power, high-precision CMOS voltage

reference, featuring ±0.05% initial accuracy, low

operating current with power consumption less than

95 μA. This device also offers very low output noise of

signal integrity with high-resolution data converters in

noise critical systems. With a small SOT-23 package,

REF34xx offers enhanced specifications and pin-to-

pin replacement for MAX607x and ADR34xx. The

REF34xx family is compatible to most of the ADC and

DAC such as ADS1287, ADUCM360, ADS1112.

Stability and system reliability are further improved by

the low output-voltage hysteresis of the device and

low long-term output voltage drift. Furthermore, the

small size and low operating current of the devices

(95 μA) can benefit portable and battery-powered

applications.

REF34xx is specified for the wide temperature range

of

−40°C

to

+125°C.

Contact

the

TI

sales

representative for additional voltage options.

Device Information

PART NAME

PACKAGE

(1)

BODY SIZE (NOM)

REF34xx

SOT-23 (6)

2.90 mm × 1.60 mm

REF34xxT

(2)

SOT-23 (6)

2.90 mm × 1.60 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet

(2)

Product Preview

10

10

Input Signal

124

1 nF

ADS1287

VIN

REF

CIN

1µF

COUT

10 µF

-

+

REF34xx

Copyright © 2017, Texas Instruments Incorporated

Simplified Schematic

Load Current (mA)

0

0.04

0.08

0.12

0.16

0.2

0.24

0.28

0.32

0.36

0.4

5

10

0

+25°C

-40°C

+125°C

D001

Dropout vs. Current Load Over Temperature

www.ti.com

REF3425, REF3430, REF3433, REF3440, REF3450

SBAS804C – SEPTEMBER 2017 – REVISED FEBRUARY 2021

Copyright © 2021 Texas Instruments Incorporated

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Product Folder Links: REF3425 REF3430 REF3433 REF3440 REF3450

REF3425, REF3430, REF3433, REF3440, REF3450

SBAS804C – SEPTEMBER 2017 – REVISED FEBRUARY 2021

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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION

DATA.