Replacement for REF3125, GX3125 Applied to Inverter, Temperature Drift 15ppm/°C
Time:2025-03-24
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Frequency converter is an electric equipment to control AC motor by changing the frequency of motor‘s working power supply, which can realize adjustable voltage and frequency, energy saving and speed regulation. Frequency converter requires high accuracy of output voltage, so it is necessary to choose a voltage reference source with high accuracy. Generally speaking, a voltage reference source with an accuracy of ±0.1% or higher can meet the application requirements of most frequency converters to ensure the accuracy of the output voltage of the frequency converter, thus realizing precise control of the motor.
GX3125 is a low-temperature drift (up to 15ppm / ℃), low-power, high-precision CMOS reference voltage source, performance can replace TI‘s REF3125, industrial, medical equipment, instrumentation, precision measurement, automotive and other fields. Its cost advantage is a very high quality domestic replacement program.

The GX3125 has the highest initial accuracy of ± 0.15%, low operating current, power consumption of less than 125 μa. The device also provides 15 μVp-p/V low output noise, compatible with most ADCs and DACs, which provides a small SOT-23 package. The device‘s low output voltage hysteresis and low long-term output voltage drift further improve system stability and reliability. Replacement for REF3125, GX3125 for inverter applications, temperature drift 15ppm/°C
Key Features Description:
- Initial accuracy: ±0.15% max.
- Temperature coefficient: 15ppm/°C, -40°C to +125°C max.
- Operating temperature range: -40 °C to +125 °C
- Output Current: ±10mA
- Low Power Current: ±125μA
- Ultra Low Zero Load Voltage Drop: 200mV
- Input Voltage: 2.7V~5.5V
- Output 1/f noise (0.1Hz to 10Hz): 15μVp-p/V
- Long-term stability: 45ppm/10,000 hours
- Package type: SOT-23(3)