Load Current (mA)

0

0.04

0.08

0.12

0.16

0.2

0.24

0.28

0.32

0.36

0.4

-10

-5

5

10

0

+25°C

-40°C

+125°C

drop

REF3425-Q1

OUT

2.5V VREF

IN

GND

ADS7828-Q1

AIN0

AIN1

VREF+

VREF-

VDD

3V VDD

AIN2

AIN3

TDA2 (MCU)

I2C

3.3V VDD

I2C

GPIOx

VDD

Copyright © 2017, Texas Instruments Incorporated

EN

GPIO0

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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. ADVANCE INFORMATION for pre-production products; subject to

change without notice.

REF3425-Q1, REF3430-Q1, REF3433-Q1, REF3440-Q1, REF3450-Q1

SBAS901 – JULY 2018

REF34xx-Q1 Low-Drift, Low-Power, Small-Footprint Series

Voltage References

1

1 Features

1

•

AEC-Q100 Qualified With the Following Results:

–

Device Temperature Grade 1: –40°C to

+125°C Ambient Operating Temperature

•

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)

•

Low Shutdown Mode Current: 3 μA (maximum)

•

Wide Input Voltage: 12 V

•

•

Excellent Long-Term Stability 25 ppm/1000 hrs

•

Small Footprint 6-Pin SOT-23 Package

2 Applications

•

Body Control Modules

•

On Board Chargers

•

Traction Inverters

•

Battery Management Systems

•

Advanced Driver Assistance Systems

3 Description

The REF34xx-Q1 devices are low-temperature-drift

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

references. The devices have ±0.05% initial accuracy

and low operating current with power consumption

less than 95 μA. These devices also offer very low

to maintain high signal integrity with high-resolution

data converters and noise critical systems.

Stability and system reliability are further improved by

the low output-voltage hysteresis of these devices

and low long-term output voltage drift. Furthermore,

the small size and low operating current of the

devices (95 μA) make them an excellent choise for

battery-powered

applications.

The

REF34xx-Q1

features an enable pin that can set the device into

shutdown where it consumes a low stand by current

(3 μA) to help with overall system power during

standby.

The REF34xx-Q1 family 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 NUMBER

PACKAGE

BODY SIZE (NOM)

REF3450-Q1

SOT-23 (6)

2.90 mm × 1.60 mm

REF3440-Q1

SOT-23 (6)

2.90 mm × 1.60 mm

REF3433-Q1

SOT-23 (6)

2.90 mm × 1.60 mm

REF3430-Q1

SOT-23 (6)

2.90 mm × 1.60 mm

REF3425-Q1

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.

Simplified Schematic

Dropout vs Current Load Over Temperature