Compatible with AD7699 and GX7699, widely used in industrial process control

As is well known, precise data collection and processing in the field of industrial process control can ensure system stability, efficiency, and quality issues. For industrial production, power monitoring, process control, etc., analog-to-digital converters work together with other components such as controllers and actuators to achieve precise monitoring and control of the production process, optimize the production process, improve production efficiency, reduce costs, and ensure the safety and reliability of the production process. This article mainly introduces the application of GX7699 analog-to-digital conversion chip replacing AD7699 in industrial process control.

GX7699 has the characteristics of high resolution and high precision, and can perform extremely fine measurement and conversion of various analog signals in industrial process control. It can provide accurate and reliable digital outputs for key parameters such as pressure, temperature, flow rate, and liquid level, providing precise feedback information for the control system.

The GX7699 is equipped with all the necessary components for a multi-channel, low-power data acquisition system, including a lossless 16 bit SAR ADC, a low crosstalk 8-channel multiplexer, a low drift 4.096V reference and buffer, a temperature sensor, an optional single pole filter, and a sequence generator for sequentially scanning channels. GX7699 uses SPI interface to read and write configuration registers. The SPI interface is powered by a separate VIO power supply and operates at a temperature range of -40 ° C to+125 ° C.

The analog-to-digital converter has good linearity and stability, which can ensure the accuracy and reliability of measurement results during long-term operation. This is a key factor in ensuring production efficiency and safety for process control systems that require continuous and stable operation. Its main characteristics are as follows:

1. Resolution: 16 bits, Sampling rate: 500kSPS

2. 8-channel multiplexer with input options: unipolar single ended input, differential input (using reference ground), pseudo bipolar input, fully differential input

3 SNR： 90.8dB@1kHz ， VREF=4.096V； 90.1dB@20kHz ， VREF=4.096V

4. Analog input range: 0V to VREF (VREF up to VDD)

5. Built in channel sequencer, optional single pole filter, busy indicator

6. Power supply voltage: single power supply 5V; logic interface voltage: 1.8V to 5V

7. Serial interface: compatible with SPI, MICROWIRE, QSPI, and DSP

8. Power consumption: 8.3mW@500kSPS ；1.8μW@100SPS

9. Standby current: 23nA

10. 4mm × 4mm QFN-20 package