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Product details

Parameters

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

Features

  • 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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Description

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 suitable for test and measurement applications which demand a precise reference to be paired with precision high resolution data converters to achieve best performance in the signal chain. The REF70 is also suitable 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 a low long term drift for applications requiring 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
* Datasheet REF70 2 ppm/°C Maximum Drift, 0.23 ppmp-p 1/f Noise, Precision Voltage Reference datasheet (Rev. A) Dec. 23, 2020
User guide REF70EVM User's Guide Oct. 02, 2020

Design & development

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Hardware development

EVALUATION BOARD Download
document-generic User guide
59
Description

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 (...)

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

Design tools & simulation

SIMULATION TOOL Download
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 (...)
Features
  • 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
  • (...)

CAD/CAE symbols

Package Pins Download
LCCC (FKH) 8 View options

Ordering & quality

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