GXSC ADC GX2245 Helps Improve Distribution Network Traveling Wave Ranging Device Accuracy, Replaces LTC2245

In order to better support distribution network operation and monitoring, operation and maintenance maintenance, fault disposal, it is required to strengthen single-phase ground fault processing and promote the application of mature sensing equipment at important nodes.

The current distribution line operating environment is poor, the failure rate is high, and it is very easy to cause danger, and the existing automation equipment can‘t realize the fault accurate ranging and early warning, which seriously restricts the further improvement of the reliability of modern intelligent distribution network power supply.

And traveling wave technology has been tentatively applied to the distribution network. Traveling wave technology is based on the collected fault traveling wave signals for calculation and analysis, in order to realize the accurate research and judgment of various types of faults as well as fault location, greatly improving the efficiency of operation and maintenance.

However, the current distribution network on traveling wave ranging device positioning accuracy requirements are extremely high, while facing the complex environment of the distribution network, in order to achieve a high degree of accuracy fault research and judgment and high-precision fault location, must rely on precision, high-speed analog signal chain products, this paper introduces a high-performance, low-power, low-cost industrial-grade solutions, which ADC can be used as a single-channel 14-bit 10/25/40/65/80Msps ADC GXX. 80Msps ADC GX2245.

Featuring a multi-stage differential pipeline architecture with built-in high-performance sample-and-hold circuitry and an on-chip reference voltage source, the GX2245 is designed to digitize high-frequency, wide-dynamic-range signals and is ideally suited for demanding imaging and communications applications. With a 72.8dB signal-to-noise ratio and 85dB spurious-free dynamic range at 80Msps sampling, the GX2245 can be used for input signals well beyond the Nyquist frequency. DC specifications include ±1LSB INL (typical), ±0.25LSB DNL (typical) and no leakage codes. Reference noise at the inputs is very low at 0.96LSB RMS.

The GX2245 is available in a small QFN-32 5mm x 5mm package and features low power consumption of only 60mW at 10Msps, which is extremely favorable for compact layouts and reduces design complexity while lowering power consumption throughout the system signal chain.