24 bit analog-to-digital converter GX131E0X replaces ADS131E0X for monitoring three-phase electrical parameters in smart grids

In the smart grid, three-phase electrical parameter monitoring mainly realizes electricity metering, load scheduling, fault warning and other links, real-time collection of three-phase voltage, current, power, harmonics and other parameters of transmission lines, distribution transformers, and user terminals, providing data support for grid optimization.

The collection system for smart grid monitoring scenarios requires multi-channel synchronization and simultaneous capture of the phase relationship between three-phase voltage and current to ensure accurate power and power factor calculations. It requires a wide dynamic range and covers large fluctuations from no-load microampere current to short-circuit kiloampere current; We also need to have strong anti-interference capabilities to resist complex interferences such as power grid frequency interference, switch operation surges, and electromagnetic radiation. The 24 bit 144KSPS4/6/8-channel analog-to-digital converter GX131E0X from GXSC is an ideal acquisition device for monitoring three-phase electrical parameters in smart grids, fully matching the needs of grid monitoring.

The GX131E0X is equipped with a programmable gain amplifier, internal reference, and onboard oscillator. With its wide dynamic range, scalable data transmission rate, and internal fault detection and monitoring capabilities, ADC has been favored for industrial power monitoring and protection, as well as testing and measurement applications. True high impedance input supports GX131E0X to be directly connected to a resistive voltage divider network or voltage transformer to measure line voltage, or connected to a current transformer or Rogowski coil to measure current. The high integration and excellent performance of GX131E0X can create upgradable industrial and commercial power systems while reducing size, power consumption, and overall cost.

The GX131E0X has a flexible input multiplexer on each channel, which is independently connected to generate signals internally for testing, temperature, and fault detection. Fault detection can be performed internally within the device, which utilizes an integrated comparator with trigger levels controlled by a digital to analog converter. The chip features are as follows:

Four/six/eight channel differential analog-to-digital converter input

Dynamic range: 120dB at 1kSPS; Crosstalk: -125dB; Total harmonic distortion: -108dB at 50Hz and 60Hz

Single pole power supply range: analog power supply 3V to 5V, digital power supply 1.8V to 3.6V

Low power consumption: 2.3mW per channel

• Data rates: 0.25, 0.5, 1, 2, 4, 8, 16, 32, and 64 kSPS

• Programmable gains: 1, 2, 3, 4, 6, 8, 12, and 24

• Fault detection and device testing functions

SPITM data interface and four universal input/output interfaces

• Excellent ESD capability

• Packaging: QFP-64, BGA-64

• Operating temperature range: -40 ° C to+105 ° C