The 16-bit 4-channel 125 MSPS Analog-to-Digital Converter GX9653, comparable to the AD9653, is applied in mechanical health monitoring

Mechanical structural health monitoring enables the continuous surveillance of structural conditions throughout the entire process of structural testing and service, facilitating condition-based maintenance, enhancing structural reliability, and reducing operational and maintenance costs. Consequently, mechanical structural health monitoring technology has garnered significant attention. Mechanical health monitoring is a critical technology for ensuring the safe operation of equipment and preventing unexpected failures. It involves collecting signals such as vibration, impact, temperature, and sound pressure from mechanical equipment through sensors and analyzing the characteristics of these signals.

This type of signal is characterized by a wide bandwidth and strong interference. This paper introduces the 16-bit, four-channel, 125 MSPS analog-to-digital converter (GX9653) for mechanical health monitoring. The domestically produced ADC meets the application requirements of mechanical health monitoring and can serve as a pin-to-pin replacement for the AD9653, offering a new alternative solution.

The GX9653 features an integrated sample-and-hold circuit, specifically designed for low cost, low power consumption, compact size, and ease of use. It boasts a maximum conversion rate of up to 125 MS/s, delivering outstanding dynamic performance and low-power characteristics, making it suitable for applications such as industrial automation, communications, test and measurement, and medical equipment. The GX9653 operates on a single 1.8V power supply and is compatible with LVPECL/CMOS/LVDS sample-rate clock signals, ensuring optimal performance. For most applications, external reference power sources or driver devices are unnecessary.

To achieve the appropriate LVDS serial data rate, the GX9653 automatically multiplies the sampling rate clock. It provides a data clock output (DCO) for capturing data at the output and a frame clock output (FCO) for transmitting new output byte signals. It also supports individual channels entering power-saving mode; when all channels are disabled, the power consumption is less than 10mW. Its key performance specifications are as follows:

1. Static Performance: DNL -0.9/+1.5 LSB, INL -8.0/+8.0 LSB  

Full Power Bandwidth: 6 GHz (-3dB)

2. Dynamic Performance (fs=125 MSps, Input Signal Power -1 dBFS)

fin=9.7MHz

ENOB=11.7Bit，SINAD=72.3dBFS，SNR=72.6dBFS

fin=70MHz

ENOB=11.3Bit，SINAD=69.5dBFS，SNR=69.8dBFS

fin=128MHz

ENOB=10.7Bit，SINAD=66.4dBFS，SNR=66.7dBFS

fin=200MHz

ENOB=10.2Bit，SINAD=62.9dBFS，SNR=63.2dBFS