Essential Knowledge About Next-Gen Voltage References

In the face of emerging applications such as artificial intelligence (AI) and human-machine interaction, we need to collect various analog environmental data, transforming, analyzing, and learning from it, so that the system can make predictable and accurate responses based on changes in the environment. In this process, achieving precise measurement in analog-to-digital conversion is a key aspect, and to achieve this goal, a voltage reference source that is unaffected by input voltage or environmental temperature, and does not fluctuate with the system, is essential.

A voltage reference source is a precision analog device specifically designed to maintain a constant output voltage, even when environmental temperature or supply voltage changes, allowing other ICs to reference this voltage standard for measurements with the desired accuracy. With its high precision characteristics, the voltage reference source can also shine in other application scenarios besides data converters.

In this video lecture, experts from Texas Instruments (TI) will explain in detail the impact of key specifications such as power consumption, noise, temperature coefficient, and accuracy of voltage references on system performance in practical application designs, while also introducing TI’s next-generation high-performance voltage reference products and their rich application scenarios.

Speaker

Essential Knowledge About Next-Gen Voltage References

Wang Shubiao (王书彪)

TI – Texas Instruments – Field Application Engineer

Graduated with a master’s degree in Power Electronics from South China University of Technology in 2018. Joined TI in the same year in Shenzhen, responsible for technical support for major clients. His main technical application directions are in the fields of switch-mode power supplies, battery management, audio, etc.

Next, we will summarize the important knowledge points from this video lecture for your reference during product selection and development.

Important Parameters of Voltage References

Main Specifications

Impact on Systems

Low Quiescent Current (IQ)
  • Using low quiescent current (IQ) in series with voltage references can minimize power consumption and extend battery life.
  • Helps minimize power loss in all systems and extends the operating time of battery-powered devices such as blood glucose monitors, wireless headphones, and pressure transmitters.
  • Achieves low standby power consumption while reducing system costs.

Low Noise and High Precision
  • Low drift and high initial precision characteristics help achieve reliable stability under various variable temperatures and voltages.
  • Can provide excellent performance for many demanding industrial and automotive applications.

Small Package

  • Micro solutions suitable for space-constrained applications.

Comparison of Parallel and Series Voltage Reference Characteristics

Essential Knowledge About Next-Gen Voltage References

(Image Source: Texas Instruments)

REF35 New Series of Ultra-Low Power High-Precision Voltage Reference

Essential Knowledge About Next-Gen Voltage ReferencesFunctional Block Diagram Essential Knowledge About Next-Gen Voltage ReferencesSOT-23 (DBV)Package2.90mm×1.60mm
(Image Source: Texas Instruments)

Product Features

  • Low power, low drift, high precision reference device series
  • High initial precision (±0.05%), with power consumption typically below 700nA.
  • Low temperature drift (10ppm/°C) and low long-term drift (20ppm over 1000 hours)
  • Provides a wide output voltage range (1.024V to 5.0V)
  • Rated operating temperature range of -40°C to 125°C, can operate from -55°C to 125°C, suitable for industrial applications.
  • Space-saving SOT23 6-pin package

REF35 Application Examples

Essential Knowledge About Next-Gen Voltage References

(Image Source: Texas Instruments)

Reference Applications

  • FlowTransmitters
  • BloodGlucose Monitoring
  • ServoDriver Control Modules
  • PowerQuality Analyzers
  • FaultIndicators
  • WaveformGenerators
  • ProcessAnalysis

Related Technical Documentation

  • Digi-Key TI Voltage Reference Products
  • TI REF35 Product Page
  • REF35 Datasheet (Chinese)
  • White Paper: Tips and Tricks for Designing with Voltage References
  • White Paper: Long-Term Drift of Voltage References
  • White Paper: Voltage Selection and Design Tips for Data Converters
  • TI Voltage Reference Products
→ For more information on TI products, please visit the TI Texas Instruments product section on the Digi-Key website>>

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