Product details

VO (V) 5 Initial accuracy (Max) (%) 0.05 Temp coeff (Max) (ppm/ degree C) 3 Vin (Min) (V) 5.2 Vin (Max) (V) 18 Iq (Typ) (uA) 800 Rating Catalog Features TRIM/NR pin Iout/Iz (Max) (mA) 10
VO (V) 5 Initial accuracy (Max) (%) 0.05 Temp coeff (Max) (ppm/ degree C) 3 Vin (Min) (V) 5.2 Vin (Max) (V) 18 Iq (Typ) (uA) 800 Rating Catalog Features TRIM/NR pin Iout/Iz (Max) (mA) 10
SOIC (D) 8 19 mm² 3.91 x 4.9 VSSOP (DGK) 8 15 mm² 3 x 4.9
  • Low temperature drift:
    • High-grade: 3 ppm/°C (maximum)
    • Standard-grade: 8 ppm/°C (maximum)
  • High accuracy:
    • High-grade: 0.05% (maximum)
    • Standard-grade: 0.1% (maximum)
  • Low noise: 3 µVPP/V
  • Excellent long-term stability:
    • 50 ppm/1000 hr (typical) first 1000 hours (VSSOP)
    • 25 ppm/1000 hr (typical) second 2000 hours (VSSOP)
  • High-output current: ±10 mA
  • Temperature range: –40°C to 125°C
  • Low temperature drift:
    • High-grade: 3 ppm/°C (maximum)
    • Standard-grade: 8 ppm/°C (maximum)
  • High accuracy:
    • High-grade: 0.05% (maximum)
    • Standard-grade: 0.1% (maximum)
  • Low noise: 3 µVPP/V
  • Excellent long-term stability:
    • 50 ppm/1000 hr (typical) first 1000 hours (VSSOP)
    • 25 ppm/1000 hr (typical) second 2000 hours (VSSOP)
  • High-output current: ±10 mA
  • Temperature range: –40°C to 125°C

The REF50xx is a family of low-noise, low-drift, very high precision voltage references. These references are capable of both sinking and sourcing current, and have excellent line and load regulation.

Excellent temperature drift (3 ppm/°C) and high accuracy (0.05%) are achieved using proprietary design techniques. These features, combined with very low noise, make the REF50xx family ideal for use in high-precision data acquisition systems.

Each reference voltage is available in both high grade (REF50xxIDGK and REF50xxID) and standard grade (REF50xxAIDGK and REF50xxAID). The reference voltages are offered in 8-pin VSSOP and SOIC packages, and are specified from –40°C to 125°C.

The REF50xx is a family of low-noise, low-drift, very high precision voltage references. These references are capable of both sinking and sourcing current, and have excellent line and load regulation.

Excellent temperature drift (3 ppm/°C) and high accuracy (0.05%) are achieved using proprietary design techniques. These features, combined with very low noise, make the REF50xx family ideal for use in high-precision data acquisition systems.

Each reference voltage is available in both high grade (REF50xxIDGK and REF50xxID) and standard grade (REF50xxAIDGK and REF50xxAID). The reference voltages are offered in 8-pin VSSOP and SOIC packages, and are specified from –40°C to 125°C.

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Technical documentation

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Type Title Date
* Data sheet REF50xx Low-Noise, Very Low Drift, Precision Voltage Reference datasheet (Rev. J) PDF | HTML 14 Jul 2022
Application note Voltage Reference Design Tips For ADC Pairing (Rev. A) PDF | HTML 02 Jun 2021
E-book Tips and tricks for designing with voltage references (Rev. A) 07 May 2021
Application note Long-Term Drift in Voltage References PDF | HTML 25 Mar 2021
Application note Low-Noise Negative Reference Design with REF5025 01 Dec 2019
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
White paper Voltage reference selection basics white paper (Rev. A) 23 Oct 2018
Circuit design ±12-V voltage sensing circuit with an isolated amplifier and differential input 20 Sep 2018
Circuit design High-current battery monitor circuit: 0–10A, 0-10kHz, 18 bit 22 Dec 2017
Technical article How to achieve higher-precision data acquisition in benchtop test equipment 16 Dec 2016
Technical article Understanding voltage references: level shift of precision voltage references 15 May 2015
Technical article Understanding Voltage References: Using a Shunt Reference as a Comparator 12 May 2015
Technical article Understanding Voltage References: How to achieve shunt reference flexibility with series reference precision 05 May 2015
Application note Stacking the REF50xx for High-Voltage References 29 May 2013
Application note Low Power Input and Reference Driver Circuit for ADS8318 and ADS8319 24 Jun 2009

Design & development

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