Domestic single-channel 16-bit 750kSPS synchronous sampling analog-to-digital converter replacing AD7612 for process control applications

In the field of industrial production, process control serves as a critical link in ensuring efficient, stable operations and reliable product quality. Across various industries, including chemical, power, and mechanical manufacturing, process control monitors and precisely regulates key parameters such as temperature, pressure, flow rate, and liquid level in real time. This maintains stable production processes and prevents quality defects or reduced efficiency caused by parameter fluctuations.

In complex industrial environments, process control relies on the precise sensing and acquisition of various analog signals. The GXSC single-channel 16-bit analog-to-digital converter, the GX7612, offers outstanding performance, making it an ideal choice for data acquisition. As a low-power successive approximation ADC, the GX7612 features a conversion rate of up to 750kSPS and is pin-compatible with the AD7612.

The GX7612 supports the conversion of true bipolar input signals of ±10V and ±5V with only a 5V power supply. Through its built-in correction algorithm, the product significantly enhances both dynamic and static performance, featuring a bipolar zero-level error as low as ±2LSB and linearity better than 1LSB. Due to its single 5V power supply, the power consumption is minimized.

To simplify the PCB design of the data acquisition system, the GX7612 incorporates an input buffer with 1MΩ input impedance and an anti-aliasing filter for direct analog signal acquisition. It also integrates a flexibly configurable high-precision reference voltage generator and buffer. The chip supports both parallel and serial modes, configured through different hardware pin connection schemes. This feature creates multiple connection conditions for interfacing the device with microprocessors or DSPs.

GX7612 Application Advantages:

True bipolar analog input

Pin and software selectable ranges: 5V, 10V, ±5V, ±10V

Throughput: 750kSPS

Low power consumption: 60mW (typical value)

Parallel and Serial Interface Modes

High-Speed Serial Interface SPI/DSP

ENOB: 14.5 Bits (Typical Value)

SINAD: 89.2 dB (typical value)

SFDR: 103 dB (typical value)

INL: ±0.7LSB (typical)

DNL: ±0.5 LSB (typical)

Working power consumption: 65mW (typical value)