Product details

VO (V) 4.5 Initial accuracy (Max) (%) 0.05 Temp coeff (Max) (ppm/ degree C) 3 Vin (Min) (V) 4.7 Vin (Max) (V) 18 Iq (Typ) (uA) 800 Rating Catalog Features TRIM/NR pin Iout/Iz (Max) (mA) 10
VO (V) 4.5 Initial accuracy (Max) (%) 0.05 Temp coeff (Max) (ppm/ degree C) 3 Vin (Min) (V) 4.7 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
Circuit design High-input impedance, true differential, AFE attenuator circuit for SAR ADCs (Rev. A) 08 Mar 2019
White paper Voltage reference selection basics white paper (Rev. A) 23 Oct 2018
White paper Voltage-reference impact on total harmonic distortion 01 Aug 2016
Application note Stacking the REF50xx for High-Voltage References 29 May 2013

Design & development

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Package Pins Download
SOIC (D) 8 View options
VSSOP (DGK) 8 View options

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