GXSC Synchronous Sampling ADC Replaces AD7612 for Spectrum Analysis

Spectrum analysis is a technique that decomposes complex signals into the sum of simpler signals at different frequencies, identifying parameters such as amplitude, power, and phase for each component. Its analysis targets encompass physical signals including sound waves, light waves, and electrical signals. It finds extensive application in fields such as communication testing, radar monitoring, medical instruments, and industrial inspection.

GXSC‘s single-channel 16-bit 750kSPS synchronous sampling ADC serves as an ideal replacement for the AD7612 in spectrum analysis. Its core advantages—programmable input range, high-speed sampling, excellent linearity, and high integration—perfectly align with the signal acquisition demands of medium-to-low-speed spectrum analysis scenarios, making it a preferred solution balancing precision and cost-effectiveness.

The GXSC ADC integrates a single-channel 16-bit fast, low-power successive approximation ADC with a conversion rate up to 750kSPS. Powered by a single 5V supply, it supports true bipolar input signals ranging from ±10V to ±5V. Through built-in calibration algorithms, the product comprehensively enhances dynamic and static performance, featuring bipolar zero-level error as low as ±2 LSB and linearity below 1 LSB. Its single 5V power supply further reduces power consumption.

To simplify PCB design for data acquisition systems, the GXSC ADC incorporates an input buffer with 1MΩ input impedance and an anti-aliasing filter for direct analog signal acquisition. It integrates a flexible, configurable high-precision reference voltage generator and buffer. Supports parallel or serial modes, configurable via different hardware pin connections. This feature enables multiple interface connection options for linking the device to microprocessors or DSPs.

Application Advantages:

True bipolar analog input

Pin/software-selectable ranges: 5V, 10V, ±5V, ±10V

Throughput rate: 750kSPS

Low power consumption: 60mW (typical)

Parallel/serial interface modes

High-speed serial interface (SPI/DSP)

ENOB: 14.5 bits (typical)

 SINAD: 89.2 dB (typical)

SFDR: 103 dB (typical)

INL: ±0.7 LSB (typical)

DNL: ±0.5 LSB (typical)

Operating Power Consumption: 65 mW (typical)

CQFP48 ceramic package, compatible with imported AD7612