GXSC GX7795 Replaces AD7795 in Gas Analysis

Gas analyzer is a precision instrument for detecting and measuring gas composition, which is widely used in environmental protection, industrial production, chemical industry and other fields, and it is capable of detecting small changes in the air.

The principle is to use the gas sensor to detect the environmental gas species, through the acquisition and analysis of a variety of gas sensor signals, you can determine the content of various components in the gas mixture. The gas sensor needs to work with a high-precision ADC to convert the analog signal output from the sensor into a digital signal to achieve accurate measurement of the gas concentration.

When selecting an ADC, attention needs to be paid to its matching with the sensor, the design of the signal conditioning circuit and the calibration of the system to ensure that accurate and reliable measurement results are obtained. This article introduces the GX7795 in the gas analyzer applications, GX7795 performance can be fully compatible with ADI‘s AD7795, is a cost-effective alternative, GXSC provides technical support and stable supply channels.

The GX7795 integrates a programmable gain amplifier and a low-drift on-chip reference voltage source, providing a high-precision measurement solution for bridge sensors, thermocouples and resistance temperature devices. It is a 24/16-bit ADC with low noise, low drift and high resolution.

GX7795 application advantages and performance characteristics are as follows:

1, programmable gain: 1/2/4/8/16/32/64/128

2, data rate: 4.17SPS to 890SPS

3, RMS noise.

  20nV at 4.17SPS (Gain=128)

  63nV at 16.7SPS (Gain=128)

  21.0 noiseless bits at 4.17SPS (gain=1)

4, Offset drift: 5nV/C (gain=128); Gain drift: 1ppm/C

5, 1.17V / 2.5V internal reference voltage source, with 4ppm / ° c drift

6, package form: 24-pin TSSOP