INDUSTRY COMPONENT

Voltage Reference

A precision electronic component that provides a stable reference voltage for voltage regulation circuits.

Component Specifications

Definition
A voltage reference is a critical electronic component that generates a precise, stable, and temperature-independent DC voltage used as a reference point in analog and mixed-signal circuits. In voltage regulator ICs, it serves as the fundamental comparison standard against which the output voltage is continuously measured and adjusted to maintain regulation despite input voltage variations, load changes, and temperature fluctuations.
Working Principle
The voltage reference operates by exploiting the predictable electrical characteristics of semiconductor materials (like bandgap references) or precision components (like zener diodes) to generate a fixed voltage. In voltage regulator ICs, this reference voltage is compared to a scaled-down version of the output voltage via an error amplifier. Any difference (error) drives the control circuitry to adjust the pass element (transistor), thereby correcting the output voltage to match the reference.
Materials
Semiconductor materials (silicon, gallium arsenide), doped silicon for zener or bandgap structures, metal layers (aluminum, copper) for interconnects, passivation layers (silicon nitride, silicon dioxide), ceramic or plastic packaging.
Technical Parameters
  • Output Current 1 mA to 10 mA
  • Output Voltage 1.2V, 2.5V, 5V, 10V (typical)
  • Initial Accuracy ±0.05% to ±1%
  • Long-Term Stability 20 ppm/1000 hours
  • Supply Voltage Range 2.7V to 40V
  • Operating Temperature -40°C to +125°C
  • Temperature Coefficient 1 ppm/°C to 100 ppm/°C
Standards
ISO 9001, IEC 60747, JEDEC JESD22

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Voltage Reference.

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Reference voltage drift over time or temperature
  • Noise injection affecting regulator stability
  • Overload damage from excessive current
  • Packaging failure under thermal stress
FMEA Triads
Trigger: Semiconductor aging or contamination
Failure: Reference voltage drift beyond specification
Mitigation: Use high-quality materials, implement burn-in testing, design with redundancy or trimming
Trigger: Excessive load current or short circuit
Failure: Reference output degradation or permanent damage
Mitigation: Add current limiting circuitry, use robust packaging, follow derating guidelines
Trigger: Thermal stress from environment or adjacent components
Failure: Temporary or permanent shift in reference voltage
Mitigation: Implement thermal management, select references with low temperature coefficients, ensure proper PCB layout

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Voltage tolerance typically within ±0.1% to ±1% of nominal value across specified temperature and time ranges
Test Method
Testing per IEC 60747 for semiconductor devices, including voltage accuracy measurement, temperature cycling, long-term stability testing, and noise spectral density analysis

Buyer Feedback

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Frequently Asked Questions

What is the difference between a voltage reference and a voltage regulator?

A voltage reference provides a precise, stable voltage for comparison but has limited current output. A voltage regulator uses this reference to actively control and deliver a regulated voltage at higher currents to a load.

Why is temperature stability important in a voltage reference?

Temperature stability ensures the reference voltage remains constant across operating conditions, preventing drift that could cause output voltage errors in the regulator, critical for sensitive analog and digital circuits.

What are common types of voltage references?

Common types include bandgap references (most popular for ICs), buried zener references (high precision), and XFET references (low noise), each with different accuracy, noise, and power trade-offs.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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