Chemical analysis instruments can use the 24-bit analog-to-digital converter GX7173 to replace the AD7173.

In the field of chemical analysis, high-precision signal acquisition is a core prerequisite for ensuring the accuracy of analysis results. Chemical analysis often involves the detection of trace substances, such as photocurrent signals in spectroscopic analysis and weak current signals in electrochemical analysis. These signals typically have strengths ranging from nanoamperes to microamperes and are easily affected by environmental noise. Therefore, the ADC must have extremely high resolution and extremely low noise levels, and must support multi-channel synchronous sampling.

The 8/16-channel 24-bit GX7173 high-performance ADC is fully capable of replacing the AD7173 in chemical analysis instrument applications, and it performs exceptionally well in key metrics such as noise performance, temperature stability, and long-term drift, making it the optimal solution for replacing the AD7173.

The GX7173 is a fast-settling, highly accurate, low-power, 8/16-channel, multiplexed ADC suitable for low-bandwidth input signals, featuring an integrated input buffer. The device integrates a precision 2.5V low-drift (3.5ppm/°C) bandgap reference voltage source and oscillator. The device offers eight flexible configurations for setting output data rates, digital filter modes, offset/gain error correction reference voltage selection, buffer enable, PGA, and more.

GX7173 Performance Specifications:

• 17.5-bit noise-free resolution (31.25 kSPS)

• 24-bit noise-free resolution (1.25 SPS)

• Integral nonlinearity (INL): ±3 ppm/FSR

• 50 Hz and 60 Hz suppression: 85 dB, with a settling time of 50 ms

• Operating voltage: 3.3V or 5V; current: 4mA

• 3/4-wire serial digital interface (SCLK is a Schmitt trigger)

• CRC error checking, compatible with SPI, QSPI, MICROWIRE, and DSP

• QFN-40 package, 6mm × 6mm

Summary: The analog-to-digital converter GX7173 enhances signal acquisition quality, driving chemical analysis toward higher sensitivity and broader dynamic range. As technology continues to advance, the GX7173 will play an increasingly critical role in fields such as environmental monitoring, biopharmaceuticals, and materials science.