GXSC Analog-to-Digital Converter Replaces AD9689 in Microwave Backhaul Equipment

With the widespread adoption of emerging technologies like 5G and IoT, demand for microwave backhaul equipment—a critical communication infrastructure—has surged significantly. From a supply-demand perspective, the current industry faces a shortage, particularly in high-frequency, high-capacity, low-latency products where market needs are most urgent. To meet this demand, companies are intensifying R&D investments and driving technological innovation to enhance product performance and reduce costs.

Microwave backhaul equipment imposes higher demands on transmission capacity, latency, interference resistance, and bandwidth flexibility. Particularly in high-frequency deployments (e.g., 28GHz, 70/80GHz), it requires high-precision, high-speed acquisition and digital processing of broadband microwave signals, necessitating stringent selection criteria for key components like analog-to-digital converters (ADCs). This paper recommends the GXSC dual-channel 14-bit 2.6GSPS high-speed analog-to-digital converter, which offers pin-to-pin replacement for ADI‘s AD9689.

The GXSC ADC is a high-speed, high-resolution, dual-channel ADC designed for high-end, high-performance applications. Its key features include a 1.25GSPS sampling rate, 14-bit resolution, and two integrated channels. The JESD204B high-speed serial interface simplifies system connectivity. It is suitable for scenarios demanding stringent requirements for sampling speed, channel count, signal bandwidth, and dynamic range, such as radar, instrumentation, and communication infrastructure.

Core Features of the GXSC Analog-to-Digital Converter:

Dual-Channel ADC: Integrates two independent 14-bit analog-to-digital converter channels for simultaneous acquisition of two analog signals.

Ultra-High Sampling Rate: Achieves a maximum sampling rate of 1.25 GSPS, enabling capture of extremely high-frequency signals or realization of exceptionally high instantaneous bandwidth.

14-bit Resolution: Delivers excellent dynamic range and signal-to-noise ratio, suitable for high-precision applications.

Wide Input Bandwidth: Optimized analog input circuitry provides outstanding linearity and dynamic performance at high sampling rates, with effective input bandwidth typically reaching hundreds of MHz or even GHz levels.

Key Performance Metrics for GXSC Analog-to-Digital Converters (Typical Values):

Signal-to-Noise Ratio (SNR): Typically around 65 dBFS (actual value depends on input frequency and sampling rate).

Spurious-Free Dynamic Range (SFDR): Typically 80-90 dBc or higher, indicating strong suppression of spurious signals.

Power Consumption: Relatively high power consumption (typically 1.5-2.5 watts depending on mode and sampling rate) is a trade-off for high performance, requiring robust thermal management.

Power Supply: Requires multiple voltage rails (e.g., 1.3V, 2.5V) with stringent noise and ripple specifications.

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