REF54 0.8 ppm/°C Maximum Drift, 0.11 ppmp-p 1/f Noise, 380 μA Current, Precision

Voltage Reference

1 Features

• Low temperature drift coefficient:

– 0.8 ppm/°C maximum (C grade, 0°C to 70°C)

– 1.5 ppm/°C maximum (Q grade, -40°C to

125°C)

• Low noise (0.1 Hz to 10 Hz):

– 0.11 ppmp-p with CNR = 100 μF

– 0.45 ppmp-p with CNR = Open

• High accuracy: ±0.02% maximum

• Low quiescent current: 380 μA maximum

• Low long-term stability (1k hr): 25 ppm

• Designed for a wide range of applications:

– AEC-Q100 qualified

– Wide input voltage up to 18 V

– Output current: ±10 mA

– Voltage options: 2.5 V, 3 V, 4.096 V, 4.5 V, 5 V

• Fit for all design requirement:

– Stable with 1-μF to 100-μF output low-ESR

capacitor

– High PSRR: 100 dB at 1 kHz

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

2 Applications

• Semiconductor test equipment

• Precision data acquisition systems

• Precision weight scales

• Ultrasound scanner

• X-ray systems

• Industrial instrumentation

• PLC analog I/O modules

• Field transmitters

• Power monitoring

• Battery management system

3 Description

The REF54 is a family of high precision, low-drift,

low current consumption series voltage reference

devices. The REF54 family offers low temperature

drift coefficient (0.8 ppm/°C), low noise (0.11 ppmp-p)

and high accuracy (±0.02%) while consuming 260

μA current. The REF54 with low long-term drift (25

ppm), excellent load and line regulation helps meet

strict performance requirements of high precision

applications. The device family is designed as a

companion device for high-resolution data converters

such as ADS8900B, ADS127L11, ADS1285 and

DAC11001B.

The REF54 family supports wide supply voltage rating

of 18 V. The wide supply range allows for direct

connection to the battery or field supply. This also

protects the device in case of power supply IC

failure. The REF54 device supports up to 10 mA

load current. The wide load current support allows

for direct connection of REF54 as power supply to

precision sensors.

The REF54 is specified for the wide temperature

range of −40°C to +125°C. The wide temperature

range enables operation across various automotive

and industrial applications.

Device Information

PART NAME

PACKAGE (1)

BODY SIZE (NOM)

REF54

SOIC (8)

4.90 mm × 3.91 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

VIN

EN

1 μF

10 μF

GND

GND

GND

GND

GND

NR

VREF

Optional

Input

Output

REF54

Basic Connection Diagram

Basic Connection Diagram

Temperature (

C)

0

10

20

30

40

50

60

70

-100

-60

-20

20

60

100

Output Voltage Vs Free-Air-Temperature

REF54

SNVSCN7 – NOVEMBER 2023

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.