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

10

10

Input Signal

124

1 nF

ADS1287

VIN

REF

CIN

1µF

COUT

10 µF

-

+

REF34xx

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Reference

Design

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.

REF3425, REF3430, REF3433

SBAS804A – SEPTEMBER 2017 – REVISED DECEMBER 2017

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

1

1 Features

1

•

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 30 ppm/1000 hrs

•

Small Footprint 6-Pin SOT-23 Package

2 Applications

•

Precision Data Acquisition Systems

•

PLC Analog I/O Modules

•

Field Transmitters

•

Portable, Battery - Operated Equipment

•

Industrial Instrumentation

•

Test Equipment

•

Power Monitoring

•

LCR Meters

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

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(1)

PART NAME

PACKAGE

BODY SIZE (NOM)

REF3425

SOT-23 (6)

2.90 mm × 1.60 mm

REF3430

REF3433

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

the end of the data sheet.

Simplified Schematic

Dropout vs. Current Load Over Temperature