REF70 Ultra-High-Precision Voltage Reference with Low Noise and Low Drift

1 Features

• Low noise :

• Low temperature drift coefficient :

– 2 ppm/°C (maximum for -40°C to 125°C)

• High accuracy: ±0.025% (maximum)

• Available in humidity resistance ceramic package

(LCCC)

• Low dropout: 250 mV

• Wide input voltage: 3 V to 18 V

• Output current: ±10 mA

• Industry standard voltage options: 2.5 V, 3.0 V, 3.3

V, 4.096 V, 5.0 V

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

2 Applications

• Precision data acquisition systems

• Industrial instrumentation

• Semiconductor test equipment

• Power monitoring

• PLC analog I/O modules

• Field transmitters

3 Description

The REF70 device family offers a unique combination

ppm/°C), and high accuracy (±0.025%). These

characteristics of the REF70, when paired with high-

resolution data converters, enable various end

equipment to achieve their performance targets.

High initial accuracy with very low temperature and

long-term drift help reduce the need for frequent in

system calibration.

LCCC (FKH) package helps improve the long term

drift and thermal hysteresis performance further for

applications requiring a very stable reference.

REF70 is specified for the wide temperature range of

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

enables the device to operate across various

applications. Contact the TI sales representative for

additional voltage and package options.

Device Information

PART NAME(1)

PACKAGE

BODY SIZE (NOM)

REF7025

LCCC (8)

5.00 mm × 5.00 mm

REF7025

VSSOP (8)

3.00 mm x 3.00 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

REF70

ADS124S08

OUT

OPS2320

AIN+

AIN-

VIN

VIN

REFIN

+

+

10µF

Simplified Schematic

Temperature (°C)

-50

-25

0

25

50

75

100

125

2.499

2.49925

2.4995

2.49975

2.5

2.50025

2.5005

2.50075

2.501

Output Voltage Vs Free-Air-Temperature

www.ti.com

REF70

SNAS781 – OCTOBER 2020

Copyright © 2020 Texas Instruments Incorporated

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REF70

SNAS781 – OCTOBER 2020

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.