Four channel 16 bit 125MSPS ADC GX9653 compatible with AD9653 software and hardware for application in unmanned aerial vehicles

Drones are widely used in fields such as aerial photography, remote sensing, and security monitoring, and high-definition image transmission systems have high performance requirements for data acquisition and processing. The high-definition image transmission system of drones needs to meet the following key requirements:

High resolution: Supports 4K/8K video capture, requiring analog-to-digital converters to have high signal-to-noise ratio (SNR) and low distortion.

Low latency: Real time image transmission requires high-speed analog-to-digital converters and low processing latency.

Anti interference capability: The working environment of drones is complex, and ADCs need to have good anti electromagnetic interference (EMI) performance.

Low power consumption: To extend the endurance of the drone, the analog-to-digital converter needs to maintain low power consumption while maintaining high efficiency.

Miniaturization: Due to the limited space of drones, analog-to-digital converters need to be packaged compactly and reduce peripheral circuits.

The GXSC four channel 16 bit resolution, 125MSPS sampling rate, and 78dB SNR analog-to-digital converter GX9653 can perfectly meet these requirements. Modern drones are typically equipped with high-resolution CMOS/CCD sensors, and the output analog video signal needs to be converted into a digital signal through a high-speed analog-to-digital converter. The GX9653 analog-to-digital converter has a high dynamic range: 16 bit resolution can accurately capture details of low light or high contrast scenes, and a low noise 78dB SNR ensures clear images and reduces noise. In addition, it also supports multi-sensor data synchronization acquisition (such as RGB+infrared imaging).

The GX9653 analog-to-digital converter has on-chip sampling and holding circuits, which are characterized by low design cost, low power consumption, small size, and ease of use. Through optimized design, the conversion rate of this product can reach up to 125MSPS, achieving excellent dynamic performance and low power consumption in small-sized packaging applications. This ADC requires a 1.8V single power supply and a sampling clock compatible with LVPECL/CMOS/LVDS to achieve good performance. For most applications, no additional references or driving devices are required.

GX9653 is a 48 pin LFCSP package with a rated operating temperature range of -40 ℃~125 ℃. The chip is benchmarked against ADI‘s AD9653 series and can be replaced in situ. The main features of its chip are introduced as follows:

Data rate: 20Msps~125Msps

• Signal to Noise Ratio (SNR):

77.9dBFs@Vref =1V,fin=10MHz； 72.2dBFs@Vref =1V,fin=200MHz

• Stray free signal input range (SFDR):

96.66dBFs@Vref =1V,fin=10MHz； 78.8dBFs@Vref =1V,fin=10MHz

1.8V power consumption: single channel 170mW@125Msps

• Built in benchmark and clock buffer

Analog input bandwidth 650MHz

2Vpp input voltage range, supporting an increase to 2.6Vpp