Application of GXSC synchronous sampling analog-to-digital converter replacing AD7874 in optoelectronic encoder

The photoelectric encoder is a widely used rotary position detector in mechanical transmission systems, which has the advantages of high accuracy, high resolution, and fast response speed. With the increasing complexity and automation of mechanical transmission systems, the data acquisition and processing requirements of photoelectric encoders require more efficient and accurate data processing and transmission schemes. The GXSC four channel 12 bit analog-to-digital converter has fast sampling speed and excellent parameter stability, making it an ideal solution for high-speed data acquisition systems of photoelectric encoders.

The photoelectric encoder acquisition scheme based on GXSC analog-to-digital converter has the advantages of fast and high precision. The chip‘s self calibration technology and multi-level filter structure can effectively reduce noise levels, ensure data accuracy and reliability. For high-precision detectors such as photoelectric encoders, accurate data processing and transmission are crucial. The high pass band characteristic can effectively remove low-frequency noise to ensure the accuracy and stability of data.

The GXSC analog-to-digital converter is equipped with a 12 bit ADC, on-chip reference voltage source, on-chip clock, and four sample and hold amplifiers, allowing for simultaneous sampling of four input channels while maintaining their respective phase relationships. The aperture delay of the four sample and hold amplifiers is very small, and there are minimum and maximum limits that allow multiple chips to sample multiple input channels simultaneously without causing phase errors between signals connected to multiple devices. The reference voltage output/reference voltage input facility also allows multiple chips to be driven by the same reference voltage source.

Advantages of GXSC analog-to-digital converter products:

Powered by a 5V power supply, supporting the conversion of+10V true bipolar input signals

Product size, pins, and functionality are compatible with imported product AD7874

Standard digital interface creates conditions for the interface connection between devices and microprocessors or DSPs

Better signal-to-noise ratio, higher linearity

Lower bipolar zero level error, lower positive and negative full-scale error

Higher channel isolation

ENOB: 11.8 Bit (typical value)

SINAD: 73.4dB (typical value)

SFDR: 95dB (typical value)

INL: ± 0.1LSB (typical value)

DNL:+0.1LSB (typical value)

Working power consumption: 70mW (typical value)