Product details


VO (V) 2.5 Initial accuracy (Max) (%) 0.025 Temp coeff (Max) (ppm/ degree C) 2 Rating Catalog Vin (Min) (V) 3 Vin (Max) (V) 18 Iq (Typ) (uA) 4000 Features Enable pin Iout/Iz (Max) (mA) 10 Operating temperature range (C) -40 to 125 Shutdown current (Typ) (uA) 5 open-in-new Find other Series voltage references

Package | Pins | Size

LCCC (FKH) 8 open-in-new Find other Series voltage references


  • Low noise enables precision measurements:
    • 1/f Noise (0.1 Hz to 10 Hz): 0.23 ppmp-p
    • 10 Hz to 1 kHz: 0.35 ppmrms
  • Low temperature drift coefficient:
    • 2 ppm/°C maximum (-40°C to 125°C)
  • High accuracy: ±0.025% maximum
  • Humidity resistant hermetic ceramic package (LCCC)
  • Low long-term stability (1k hr): 28 ppm
  • Low dropout: 400 mV
  • Designed for a wide range of applications:
    • Wide input voltage up to 18 V
    • Output current: ±10 mA
    • Voltage options: 2.5 V, 3 V, 3.3 V, 4.096 V, 5 V
  • Ultra-flexible solution:
    • Stable with 1-µF to 100-µF output low-ESR capacitor
    • High PSRR: 107 dB at 1 kHz
    • Operating temperature range: −40°C to +125°C

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The REF70 is a family of high precision series voltage references that offers the industry’s lowest noise (0.23 ppmp-p), very low temperature drift coefficient (2 ppm/°C), and high accuracy (±0.025%). The REF70 offers a high PSRR, low drop-out voltage and excellent load and line regulation to help meet strict transient requirements. This combination of precision and features is designed for applications such as test and measurement that demand a precise reference to be paired with precision, high-resolution data converters such as ADS8900B, ADS127L01 and DAC11001A, to achieve optimal performance in the signal chain. The REF70 is also designed for noise-sensitive medical applications such as ultrasound and X-ray to help enable low-noise measurements from the analog front end.

The REF70 family is available in VSSOP and LCCC package options. The LCCC (FKH) package is a hermetically sealed ceramic package that allows for low, long-term drift for applications that require a stable reference over a long time period without calibration.

The REF70 is specified for the wide temperature range of −40°C to +125°C. The wide temperature range enables operation across various industrial applications.

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Technical documentation

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Type Title Date
* Data sheet REF70 2 ppm/°C Maximum Drift, 0.23 ppmp-p 1/f Noise, Precision Voltage Reference datasheet (Rev. B) Apr. 16, 2021
Application note Voltage Reference Design Tips For ADC Pairing (Rev. A) Jun. 02, 2021
Technical article How to design an accurate DC power supply Apr. 08, 2021
Application note Long-Term Drift in Voltage References Mar. 25, 2021
User guide REF70EVM User's Guide Oct. 02, 2020

Design & development

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Hardware development

document-generic User guide

The REF70 evaluation module (EVM) is a platform for evaluating the REF70 product, which is an ultra-low noise, high-precision voltage reference. REF70 offers an ultra-low 1/f noise of 0.23 ppmp-p during operation while maintaining a very precise voltage output over temperature of 2 ppm/C. REF70EVM (...)

  • Ultra-low noise
  • Ultra-low temperature drift
  • High accuracy
  • Available in a ceramic package
  • Wide input voltage (VIN)

Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

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LCCC (FKH) 8 View options

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