High precision, low-temperature drift, low-noise voltage reference GX45XX replaces ADR4525/4525/4540 for application in precision current sources

A precision current source is a key device that provides stable current excitation, and the accuracy, stability, and linearity of its output current directly determine the reliability of test or experimental results. The key requirement for such devices is to have low output current error and long-term drift of less than 5ppm/℃ in a wide load range and wide temperature environment. The voltage reference source GX45XX of GXSC has the characteristics of high precision, low temperature drift, and low noise. Its excellent long-term stability and strong anti-interference ability make it an ideal solution for precision current sources.

The GX45XX series is a high-precision, low-temperature drift, low-noise, and low-power voltage reference source. Its absolute voltage accuracy can reach within ± 0.1%. In the temperature range of -40 ℃~125 ℃, the typical temperature drift is 10ppm/℃, and the extremely low-temperature drift version has a temperature drift as low as 3ppm/℃. When the output voltage is 2.048V, the 1/f noise voltage is 9 μ Vpp. Within the range of 0Hz~1KHz, the power suppression ratio can reach up to 60dB.

Precision current sources require long-term stable operation, and long-term drift of the reference voltage can lead to a gradual decrease in current output accuracy; Meanwhile, load changes may cause fluctuations in the reference voltage, affecting current stability. The working voltage range of GX45XX is 3.1V~5.5V, with a typical static working current of 900 μ A and a maximum load current of ± 10mA. Its performance is far superior to traditional reference source chips.

GX45XX features:

10ppm/℃ ultra-low temperature float, as low as 3ppm/℃

The absolute accuracy of the initial voltage reaches ± 0.1%

0Hz~1kHz, 60dB power ripple suppression

0.1Hz~10Hz, 1/f noise as low as 9 μ Vpp

900 μ A low static current

± 10mA driving current

SOIC-8 Small Package

The rated protection level of ESD is 6kV (HBM)