REF53-Q1, 4ppm/°C Maximum Drift, 3ppmp-p 1/f Noise, 85μA Current, 30mA Load

Current, Precision Voltage Reference

1 Features

• Low temperature drift coefficient: 4ppm/°C

maximum

• Low quiescent current: 85μA typical

• Low noise

– 0.1Hz to 10Hz: 3ppmp-p

– 10Hz to 1kHz: 3ppmrms

• High accuracy: ±0.04% maximum

• Small Size: SOT-23-THN-6 (DDC) package

• Designed for a wide range of applications:

– Wide input voltage up to 18V

– Output current: +30mA/-10mA

– Voltage options: 1.2V, 1.25V, 1.8V, 2.048V,

2.5V, 3V, 3.3V, 4.096V, 4.5V, 5V

• Fit for all design requirement:

– Stable with 1μF to 50μF output low-ESR

capacitor

– High PSRR: 85dB at 1kHz

– Specified temperature range: −40°C to +125°C

– Operational temperature range: −55°C to

+125°C

2 Applications

• Field transmitters

• PLC analog I/O modules

• Power monitoring

• Medical Imaging

• Single and multiaxis servo drives

• Hospital patient care

• Electricity meter

• Battery management system

• Automotive camera

• LIDAR

• HEV/EV OBC and DC/DC converter

3 Description

The REF53-Q1 is a family of low-power, low-noise

and low-drift series voltage reference devices.

The REF53-Q1 family offers low temperature drift

coefficient (4ppm/°C) for a temperate range from

–40°C to +125°C, low-noise (2ppmp-p) and high-

accuracy (±0.04%) while consuming 150μA maximum

current. The REF53-Q1 with excellent load and

line regulation helps to meet strict performance

requirements of high precision applications. The

device family is designed as a companion device for

high-resolution data converters and AFEs. The device

is pin compatible performance upgrade to TI's REF34,

REF34-Q1 device families.

The REF53-Q1 family supports wide supply voltage

rating of 18V. This also protects the device in case

of power supply IC failure. The REF53-Q1 device

supports up to 30mA load current. The wide load

current support allows for direct connection of REF53-

Q1 as power supply to precision sensors. The REF53-

Q1 is specified for a temperate range from –40°C

to +125°C. The wide temperature range enables

operation across various industrial and automotive

applications.

Package Information

PART NAME

PACKAGE (1)

PACKAGE SIZE(3)

REF53-Q1

SOT-23-THN (6)

2.9mm × 2.8mm

SOIC (8) (2)

4.9mm × 6mm

VSSOP (8) (2)

3mm × 4.9mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

(2)

Preview package.

(3)

The package size (length × width) is a nominal value and

includes pins, where applicable.

REF53

GND

REF_S

IN

EN

CREF

VIN

VEN

VREF

CIN

REF_F

GND

GND

Basic Connection Diagram

Te mperature Coefficient (ppm/

C)

0

20

40

60

80

100

0

0.4

0.8

1.2

1.6

2

2.4

2.8

3.2

3.6

4

Temperature Drift Distribution

REF53-Q1

SNVSCU8 – AUGUST 2026

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 preproduction products; subject to change

without notice.