Home Power management Voltage references Series voltage references

REF50

ACTIVE

Low-noise, very low-drift, wide-VIN precision voltage reference

A newer version of this product is available

open-in-new Compare alternates
Drop-in replacement with upgraded functionality to the compared device
NEW REF50E ACTIVE Enhanced low-noise (0.5µVpp/V), low-drift (2.5ppm°/C), wide-VIN (42V) precision voltage reference Improved temperature drift of 2.5 ppm/°C, improved noise of 0.5 ppm p-p, and improved input voltage of 42V.

Product details

VO (V) 2.048, 2.5, 3, 4.096, 4.5, 5 Initial accuracy (max) (%) 0.05 Temp coeff (max) (ppm/°C) 3 Vin (min) (V) 2.7 Vin (max) (V) 18 Iq (typ) (mA) 0.8 Rating Catalog Features TRIM or noise-reduction pin Iout/Iz (max) (mA) 10 Operating temperature range (°C) -40 to 125
VO (V) 2.048, 2.5, 3, 4.096, 4.5, 5 Initial accuracy (max) (%) 0.05 Temp coeff (max) (ppm/°C) 3 Vin (min) (V) 2.7 Vin (max) (V) 18 Iq (typ) (mA) 0.8 Rating Catalog Features TRIM or noise-reduction pin Iout/Iz (max) (mA) 10 Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Low temperature drift (maximum):
    • Enhanced-grade (New): 2.5ppm/°C
    • High-grade: 3ppm/°C
    • Standard-grade: 8ppm/°C
  • High accuracy (maximum):
    • Enhanced-grade: 0.025%
    • High-grade: 0.05%
    • Standard-grade: 0.1%
  • Low noise:
    • Enhanced-grade: 0.5µVPP/V
    • High/Standard-grade: 3µVPP/V
  • Excellent long-term stability:
    • 22ppm after first 1000 hours (SOIC-8)
    • 50ppm after first 1000 hours (VSSOP-8)
  • Wide input voltage support:
    • Enhanced-grade: 42V
    • High/Standard-grade: 18V
  • High-output current: ±10mA
  • Temperature range: -40°C to 125°C
  • Low temperature drift (maximum):
    • Enhanced-grade (New): 2.5ppm/°C
    • High-grade: 3ppm/°C
    • Standard-grade: 8ppm/°C
  • High accuracy (maximum):
    • Enhanced-grade: 0.025%
    • High-grade: 0.05%
    • Standard-grade: 0.1%
  • Low noise:
    • Enhanced-grade: 0.5µVPP/V
    • High/Standard-grade: 3µVPP/V
  • Excellent long-term stability:
    • 22ppm after first 1000 hours (SOIC-8)
    • 50ppm after first 1000 hours (VSSOP-8)
  • Wide input voltage support:
    • Enhanced-grade: 42V
    • High/Standard-grade: 18V
  • High-output current: ±10mA
  • 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 (2.5ppm/°C) and high accuracy (0.025%) are achieved using proprietary design techniques. These features, combined with very low flicker noise (0.5µVPP/V), make the REF50xx family an excellent choice for use in high-precision data acquisition systems. REF50 family is available in enhanced grade (REF50xxEI), high grade (REF50xxI) and standard grade (REF50xxAI). The reference voltages are offered in 8-pin SOIC and VSSOP packages and are specified from –40°C to 125°C.

The REF50xxEI supports wide supply voltage rating of 42V with ultra-low IQ of 340µA. The wide supply range allows for direct connection to the battery or field supply. This also protects the device in case of power supply IC failure.

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 (2.5ppm/°C) and high accuracy (0.025%) are achieved using proprietary design techniques. These features, combined with very low flicker noise (0.5µVPP/V), make the REF50xx family an excellent choice for use in high-precision data acquisition systems. REF50 family is available in enhanced grade (REF50xxEI), high grade (REF50xxI) and standard grade (REF50xxAI). The reference voltages are offered in 8-pin SOIC and VSSOP packages and are specified from –40°C to 125°C.

The REF50xxEI supports wide supply voltage rating of 42V with ultra-low IQ of 340µA. The wide supply range allows for direct connection to the battery or field supply. This also protects the device in case of power supply IC failure.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 21
Type Title Date
* Data sheet REF50xx Low-Noise, Very Low Drift, Wide VIN Precision Voltage Reference datasheet (Rev. N) PDF | HTML 05 Mar 2025
Circuit design High-input impedance, true differential, AFE attenuator circuit for SAR ADCs (Rev. B) PDF | HTML 25 Sep 2024
Circuit design High-current battery monitor circuit: 0–10A, 0-10kHz, 18 bit (Rev. A) PDF | HTML 12 Sep 2024
Circuit design ±12 V-Spannungssensorschaltung mit isoliertem Verstärker und SAR-ADC mit Differenzeingang (Rev. A) PDF | HTML 22 Jul 2024
Circuit design 절연 증폭기와 차동 입력 SAR ADC를 지원하는 ±12V 전압 감지 회 로 (Rev. A) PDF | HTML 16 Jul 2024
Circuit design ±12-V voltage sensing circuit with an isolated amplifier and differential input (Rev. A) PDF | HTML 06 Jun 2024
Application note Voltage Reference Selection and Design Tips For Data Converters (Rev. B) PDF | HTML 09 Jan 2024
Application note Analog Time Gain Control (ATGC) Solutions for TI’s Ultrasound AFE PDF | HTML 18 May 2023
Application note Stacking the REF50xx for High-Voltage References (Rev. B) PDF | HTML 25 Apr 2023
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
Analog Design Journal Q3 2009 Issue Analog Applications Journal 24 Sep 2018
Analog Design Journal Q4 2009 Issue Analog Applications Journal 24 Sep 2018
Application brief Level Shifting Signals With Differential Amplifiers (Rev. A) 02 Apr 2018
White paper Voltage-reference impact on total harmonic distortion 01 Aug 2016
Analog Design Journal How the voltage reference affects ADC performance, Part 3 04 Oct 2009
Analog Design Journal How the voltage reference affects ADC performance, Part 2 14 Jul 2009
Application note Low Power Input and Reference Driver Circuit for ADS8318 and ADS8319 24 Jun 2009

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

ADS1148EVM-PDK — ADS1148 performance demonstration kit for 16-bit 2-kSPS ADC with PGA for sensor measurement

The ADS1148 evaluation module (EVM) performance demonstration kit (PDK) is an platform for evaluating the ADS1148 eight-channel, 16-bit, high-precision delta-sigma (ΔΣ) analog-to-digital converter (ADC). The EVM is designed to easily accept many types of analog temperature sensors (...)

User guide: PDF | HTML
Not available on TI.com
Evaluation board

ADS1248EVM-PDK — ADS1248 performance demonstration kit for 24-bit, 2-kSPS, eight-channel delta-sigma ADC

The ADS1248 evaluation module (EVM) performance demonstration kit (PDK) is an platform for evaluating the ADS1248 eight-channel, 24-bit, high-precision delta-sigma (ΔΣ) analog-to-digital converter (ADC). The EVM is designed to easily accept many types of analog temperature sensors, (...)

User guide: PDF | HTML
Evaluation board

ADS124S08EVM — ADS124S08 evaluation module

The ADS124S08EVM is a platform for evaluation of the ADS124S08 analog-to-digital converter (ADC). The ADS124S08 is a 24-bit, 4kSPS, 12 channel, low-power Delta-Sigma ADC for sensor measurement and process control applications. The ADS124S08 also includes a highly-accurate oscillator and excellent (...)
User guide: PDF
Evaluation board

ADS1282EVM-CVAL — ADS1282-SP radiation-tolerant evaluation module

The ADS1282-SP EVM is a compact evaluation kit for evaluating the ADS1282-SP, a radiation-tolerant, extremely high-performance, dual-channel ADC. The ADS1282-SP EVM plugs directly to the MSP430FR5959 launchpad (not included with ADS1282-SP EVM) which connects to PC via USB. Complete evaluation (...)

User guide: PDF
Not available on TI.com
Evaluation board

ADS8168EVM-PDK — ADS8168 8-channel 16-bit 1MSPS SAR ADC evaluation module performance demonstration kit (PDK)

The ADS8168 evaluation module (EVM) performance demonstration kit (PDK) is a platform for evaluating the performance of the ADS8168 successive-approximation register (SAR) analog-to-digital converter (ADC). The ADS8168EVM-PDK includes the ADS8168EVM board, the precision host interface (PHI) (...)

User guide: PDF
Not available on TI.com
Evaluation board

ADS8686SEVM-PDK — ADS8686S 16-channel 16-bit 1-MSPS dual simultaneous-sampling ADC performance demonstration kit (PDK)

The ADS8686S evaluation module (EVM) performance demonstration kit (PDK) is a platform for evaluating the ADS8686S dual simultaneous-sampling analog-to-digital converter (ADC) with an integrated analog front end (AFE).

ADS8686SEVM-PDK includes the ADS8686SEVM board and a precision host interface (...)

User guide: PDF
Not available on TI.com
Evaluation board

ADS8900BEVM-PDK — ADS8900B Fully-Differential Input, 20-Bit SAR ADC EVM Performance Demonstration Kit (PDK)

The ADS8900B evaluation module (EVM) performance demonstration kit (PDK) is a platform for evaluating the performance of the ADS8900B successive-approximation register (SAR) analog-to-digital converter (ADC), which is a fully-differential input, 20-bit, 1-MSPS device. (...)

User guide: PDF | HTML
Not available on TI.com
Evaluation board

ADS9120EVM-PDK — ADS9120 16-Bit, 2.5MSPS, 15.5mW SAR ADC EVM Performance Demonstration Kit (PDK)

The ADS9120 evaluation module (EVM) performance demonstration kit (PDK) is a platform for evaluating the performance of the ADS9120 successive-approximation register analog-to-digital converter (SAR ADC). The ADS9120EVM-PDK includes the ADS9120 EVM board, the PHI controller board, and accompanying (...)

User guide: PDF
Not available on TI.com
Evaluation board

DIP-ADAPTER-EVM — DIP adapter evaluation module

Speed up your op amp prototyping and testing with the DIP adapter evaluation module (DIP-ADAPTER-EVM), which provides a fast, easy and inexpensive way to interface with small surface-mount ICs. You can connect any supported op amp using the included Samtec terminal strips or wire them (...)

User guide: PDF
Not available on TI.com
Evaluation board

DLPNIRSCANEVM — DLP® NIRscan™ Evaluation Module

 

The DLP NIRscan is a complete evaluation module (EVM) to design a high performance, affordable near-infrared spectrometer.  This flexible tool contains everything a designer needs to start developing a DLP-based spectrometer right out of the box.  The EVM features the DLP 0.45 WXGA NIR (...)

User guide: PDF
Not available on TI.com
Evaluation board

PLABS-SAR-EVM-PDK — TI Precision Labs SAR ADC Evaluation Module Performance Demonstration Kit (PDK)

PLABS-SAR-EVM-PDK is an experimental platform used in conjunction with TI Precision Labs videos to gain a deeper understanding of successive approximation register (SAR) analog-to-digital converter (ADC) circuits. The evaluation module (EVM) platform contains two channels for common SAR (...)

User guide: PDF
Not available on TI.com
Development kit

EVMK2GXS — 66AK2Gx (K2G) 1GHz High-Secure Evaluation Module

The K2G 1GHz High Secure Evaluation Module (EVM) enables developers to start  evaluating and testing the programming of the  high secure developmental version of the  66AK2Gx processor, and to accelerate the next stage of secure boot product development of audio and industrial real (...)

User guide: PDF
Simulation model

REF5010 PSpice Model (Rev. A)

SLIM178A.ZIP (38 KB) - PSpice Model
Simulation model

REF5010 TINA-TI Reference Design (Rev. A)

SLIM177A.TSC (127 KB) - TINA-TI Reference Design
Simulation model

REF5010 TINA-TI Spice Model (Rev. A)

SLIM176A.ZIP (7 KB) - TINA-TI Spice Model
Simulation model

REF5020 PSpice Model (Rev. A)

SLIM160A.ZIP (39 KB) - PSpice Model
Simulation model

REF5020 TINA-TI Reference Design (Rev. B)

SLIM159B.TSC (129 KB) - TINA-TI Reference Design
Simulation model

REF5020 TINA-TI Spice Model (Rev. B)

SLIM158B.ZIP (8 KB) - TINA-TI Spice Model
Simulation model

REF5025 PSpice Model (Rev. A)

SLIM163A.ZIP (39 KB) - PSpice Model
Simulation model

REF5025 TINA-TI Reference Design (Rev. A)

SLIM162A.TSC (134 KB) - TINA-TI Reference Design
Simulation model

REF5025 TINA-TI Spice Model (Rev. A)

SLIM161A.ZIP (7 KB) - TINA-TI Spice Model
Simulation model

REF5030 PSpice Model (Rev. B)

SLIM166B.ZIP (39 KB) - PSpice Model
Simulation model

REF5030 TINA-TI Reference Design (Rev. A)

SLIM165A.TSC (130 KB) - TINA-TI Reference Design
Simulation model

REF5030 TINA-TI Spice Model (Rev. A)

SLIM164A.ZIP (8 KB) - TINA-TI Spice Model
Simulation model

REF5040 TINA-TI Reference Design (Rev. A)

SLIM168A.TSC (130 KB) - TINA-TI Reference Design
Simulation model

REF5040 TINA-TI Spice Model (Rev. A)

SLIM167A.ZIP (7 KB) - TINA-TI Spice Model
Simulation model

REF5045 PSpice Model (Rev. A)

SLIM172A.ZIP (39 KB) - PSpice Model
Simulation model

REF5045 TINA-TI Reference Design (Rev. A)

SLIM171A.TSC (130 KB) - TINA-TI Reference Design
Simulation model

REF5045 TINA-TI Spice Model (Rev. A)

SLIM170A.ZIP (7 KB) - TINA-TI Spice Model
Simulation model

REF5050 PSpice Model (Rev. A)

SLIM175A.ZIP (39 KB) - PSpice Model
Simulation model

REF5050 TINA-TI Reference Design (Rev. A)

SLIM174A.TSC (130 KB) - TINA-TI Reference Design
Simulation model

REF5050 TINA-TI Spice Model (Rev. A)

SLIM173A.ZIP (7 KB) - TINA-TI Spice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)

Many TI reference designs include the REF50

Use our reference design selection tool to review and identify designs that best match your application and parameters.

Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos