GXSC Analog-to-Digital Converters Replace AD9694 and Are Widely Used in High-Frequency Wireless Communication Applications

High-frequency wireless communication systems are a type of traditional airborne long-range communication equipment operating in the 2–30 MHz frequency range, utilizing the shortwave band to enable long-distance air-to-ground communication. The key requirements for high-frequency wireless communication are high-speed, efficient, and highly reliable signal transmission, and the accuracy and speed of the signal acquisition stage directly determine the system’s communication bandwidth, transmission rate, and interference resistance.

Traditional ADCs suffer from issues such as insufficient sampling rates, excessive power consumption, and poor noise performance. This article recommends using GXSC’s four-channel 14-bit 500 MSPS analog-to-digital converter. This chip can be used as a pin-to-pin replacement for the AD9694 to achieve precise capture and efficient conversion of wideband high-frequency signals. It also features low power consumption, a compact size, and strong anti-interference capabilities, making it suitable for signal acquisition needs in various systems such as 5G, satellite communications, and radar, thereby reducing system development time and costs.

The GXSC ADC is designed using advanced CMOS technology, featuring a multi-stage differential pipeline architecture and integrated output error correction logic. Each ADC has a wide-bandwidth input and supports various user-selectable input ranges, with both analog inputs and clock signals configured as differential inputs. The data output of this domestically produced ADC is connected via an internal multiplexer to four digital downconverters (DDCs). Each DDC consists of multiple cascaded signal processing stages, including a 48-bit frequency converter (digital controlled oscillator) and up to four half-band decimation filters. Switching between DDC modes can be controlled via SPI programming.

The reference voltage source provides a stable reference voltage for the ADC; its stability and accuracy directly affect the accuracy and consistency of ADC conversions. The GXSC ADC’s built-in reference voltage source is optimized to deliver high-performance reference voltage, ensuring stable performance across the entire operating temperature and voltage range. Furthermore, through precise manufacturing process control, the chip’s reference voltage source ensures high performance while reducing dependence on the system power supply.

GXSC Analog-to-Digital Converter Product Advantages:

1. Package size is compatible with the reference model, supporting in-place replacement of the AD9694;

2. Power consumption is approximately 53% of the reference chip, effectively reducing the overall power consumption of the system solution;

3. Wider operating temperature range of -55°C to +125°C, offering better environmental adaptability;

4. Small package size, effectively reducing system footprint;

5. High integration, incorporating digital down-conversion and filters, which helps reduce system costs;

6. 204B high-speed interface, facilitating user layout and routing;

Translated with DeepL.com (free version)