GXSC Voltage Reference GX4520/4525/4540 Replacing ADR4520/4525/4540 for Medical Equipment Applications

The precision of medical equipment directly impacts the accuracy of clinical diagnosis, and the reference voltage source serves as the "benchmark" for signal measurement, data conversion, and control circuits within the device. Firstly, it must achieve ultra-high precision and long-term stability, as even minor drift in the reference voltage can lead to measurement deviations in instruments. Secondly, it requires ultra-low noise characteristics, as the bioelectrical signals detected by medical equipment are typically of very low amplitude. Excessive noise from the reference voltage source may obscure critical physiological signal features.

The high-precision reference voltage source GX4520/4525/4540 from GXSC features exceptional stability, ultra-low noise, and a wide operating temperature range, enabling pin-to-pin replacement of ADR4520/4525/4540 for medical equipment applications. With an absolute voltage accuracy of within ±0.1%, the GX4520/4525/4540 exhibits a typical temperature drift of 5ppm/°C, while the low-drift version achieves a drift as low as 3ppm/°C, ensuring system stability in extreme environments for medical devices. At an output voltage of 2.5V, the 1/f noise voltage is 9uVpp, and the power supply rejection ratio reaches up to 60dB within the 0Hz~1KHz range.

The GX4520/4525/4540 series offers three output voltage options: 2.048V, 2.5V, and 4.096V. The typical quiescent operating current is 900μA, with a maximum load current of ±10mA. The series features an 8-pin SOIC package and operates within a temperature range of -55°C to 125°C.

Performance Indicators for GX4520/4525/4540:

Input voltage range: 2.3~6.5V

Ultra-low temperature drift, with a minimum of 3ppm/℃

The initial voltage absolute accuracy reaches ±0.1%

0Hz~1kHz, 60dB power ripple rejection

0.1Hz~10Hz, 1/f noise as low as 9μVpp

Low static current of 900μA

±10mA drive current

SOIC-8 Small Outline Integrated Circuit

Multiple voltage options: 2.048V, 2.500V, 4.096V

The ESD protection rating is 6kV (HBM)

The operating temperature range is -55°C to 125°C