Replacing the LT1021/ADR435/REF4050 with the GXSC Voltage Reference Source in Digital Voltmeters

Digital voltmeters achieve quantitative detection of voltage parameters and error verification by precisely acquiring various DC voltage signals. As precision electronics technology evolves, market demands for high measurement accuracy, long-term stability, low temperature drift, and resistance to fluctuations in digital voltmeters continue to rise.

The measurement accuracy of a digital voltmeter does not depend solely on the ADC’s sampling resolution; it also relies on the precision and stability of the voltage reference source. The temperature drift, noise, and accuracy deviation of the reference source directly contribute to the overall measurement error of the instrument. This article recommends using GXSC’s high-precision voltage reference source in voltage measurement devices. Leveraging its ultra-low power consumption, high precision, and low temperature drift, it enables accurate voltage measurements in outdoor and on-site environments with varying conditions, while balancing the need for portability, long battery life, and high-precision measurement.

Precision voltmeters impose stringent requirements on reference voltage error; they require a reference source with minimal initial deviation to reduce system-wide measurement errors at the source and ensure accurate quantitative measurements in low-voltage and ultra-low-voltage scenarios. This GXSC voltage reference source provides a 5V output that remains virtually unaffected by input voltage variations across a wide power supply voltage range of 7.2V to 40V, and supports bidirectional load currents of up to 10mA. The GXSC voltage reference source employs a patented circuit design that ensures excellent noise performance and extremely low temperature drift, making it an excellent choice for voltage references in any high-precision application.

GXSC Voltage Reference Source Features:

Wide power supply input range: 7.2V to 40V

Extremely low temperature drift: typical value of 3 ppm/°C

Initial accuracy: +0.05%

Low noise: 13 µVpp (0.1 Hz–10 Hz)

Supports fine-tuning of the output voltage

Supports bidirectional output current: +10 mA

Available in an SOP8 package

Operating temperature range: –55°C to 125°C.

Can replace the LT1021, ADR435, and REF4050