GXSC ultra-high precision, ultra-high integration, multi-channel analog acquisition AFE for Industry 4.0

In Industry 4.0 automated factories and process control application scenarios need to accurately sense information from various types of sensors (pressure, flow, temperature and weight, etc.), which means that a large number of analog signals need to be supported to collect and convert, and this type of complex automation system, there are a large number of power supplies, drives and other high-power, high-frequency power electronics, coupled with the complexity of wiring and long-distance transmission, the environment is full of various interference Factors. Therefore, a suitable analog front end (AFE) is essential for stable and accurate analog-to-digital conversion in the signal chain of sensors, analog acquisition input modules, and controllers.

The GXSC low-power, low-noise, highly integrated analog front-end chip contains high-voltage precision voltage divider resistors, 16-channel analog switches, a low-temperature-drift reference source, and a true-differential, high-precision 125KSPS 24-bit sigma-delta ADC, and supports a wide temperature range from -40 to 125°C, and provides up to 0.15% calibration-free accuracy over the full temperature range.

Product Description:

- Effective resolution: 17.9bits@62.5KSPS

- Number of channels: 16 single-ended / 8 differential pairs

- Output Rate: 125kSPS

- Overall Uncalibrated Error: 0.07%

- As low as: 0.5mV offset

- Single-supply high-voltage input: ±10V (±15V Max) input with up to ±40V input protection

- Highly integrated:

    Precision voltage divider resistor;

    Integrated internal reference: temperature drift 6ppm/°C (Typ.)

    Temperature sensor: built-in 2°C precision temperature sensor

- Support 50/60Hz simultaneous suppression

- High AC PSRR, 50dB@50Hz~100kHz

- High ESD/Temperature Rating: 2000V/1250V HBM/CDM

- Digital power supply: 2.7V~5.5V

- Analog supply: 4.5V~5.5V

- Package: 6.00mmx6.00mm QFN (40pin)

- Operating temperature range: -40°C to +125°C

The GXSC AFE is based on a sigma-delta type ADC core design, which features integral type acquisition with better noise rejection compared to SAR type ADCs, and is also capable of industrial frequency rejection. In addition, it adopts a true differential input structure, which can better suppress common mode interference and other noise interference in PLC applications. Chip front-end integrated high-voltage resistor network, support for single 5V power supply acquisition ± 10V, and provide a maximum of ± 40V input protection. It supports more channels (8 differential or 16 single-ended) and has the feature of zero return from broken line.