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

1 µF

COUT

10 µF

±

+

REF34xx-EP

Copyright © 2017, Texas Instruments Incorporated

Product

Folder

Order

Now

Technical

Documents

Tools &

Software

Support &

Community

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-EP, REF3440-EP

SBAS942 – DECEMBER 2018

REF34xx-EP 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: –55°C to 125°C

•

Output Current: ±10 mA

•

Low Quiescent Current: 95 µA (Maximum)

•

Wide Input Voltage: 12 V

•

•

Small Footprint 6-Pin SOT-23 Package

•

Supports Defense, Aerospace, and Medical

Applications:

–

Controlled Baseline

–

One Assembly/Test Site

–

One Fabrication Site

–

Available Extended (–55°C to 125°C)

Temperature Range

–

Extended Product Life Cycle

–

Extended Product-Change Notification

–

Product Traceability

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-EP 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

high

signal

integrity

with

high-resolution

data

converters in noise critical systems. With a small

SOT-23

package,

REF34xx-EP

offers

enhanced

specifications

and

pin-to-pin

replacement

for

MAX607x and ADR34xx. The REF34xx-EP family is

compatible to most of the ADC and DAC such as

ADS1287, ADUCM360, ADS1112.

The small size and low operating current of the

devices (95 µA) can benefit portable and battery-

powered applications.

REF34xx-EP is specified for the wide temperature

range of –55°C to 125°C. Contact the TI sales

representative for additional voltage options.

Device Information(1)

PART NAME

PACKAGE

BODY SIZE (NOM)

REF3425-EP

SOT-23 (6)

2.90 mm × 1.60 mm

REF3440-EP

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

the end of the data sheet.

Simplified Schematic

Dropout vs Current Load Over Temperature