The 24-bit synchronous sampling analog-to-digital converter GX131E0X replaces ADS131E0X in signal analyzers

Signal analyzers are primarily used in fields such as electronic measurement, communication testing, and industrial diagnostics to test and verify parameters of signal sources, including frequency, power, phase noise, and harmonic distortion. Depending on their purpose and functionality, signal analyzers can be categorized into various types, such as spectrum analyzers, network analyzers, and logic analyzers. They require precise acquisition of weak signals while handling synchronous measurements across multiple channels. This article recommends the use of a 24-bit synchronous sampling analog-to-digital converter, the GX131E0X, for signal analyzers, as its performance fully meets the requirements for signal acquisition.

The 24-bit Δ-Σ analog-to-digital converter GX131E0X features built-in programmable gain amplifier, internal reference, and on-chip oscillator. With its wide dynamic range, scalable data transfer rate, and internal fault detection monitoring, the GX131E0X is favored for industrial power monitoring and protection as well as test and measurement applications. Its true high-impedance input enables this domestic analog-to-digital converter to directly connect to resistive voltage divider networks or potential transformers for line voltage measurement, or to current transformers or Rogowski coils for current measurement.

The high integration and outstanding performance of the GX131E0X allow for pin-to-pin replacement of TI‘s ADS131E0X. Using this device can reduce size, power consumption, and overall solution cost, making it a highly suitable replacement option at present. 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

• Unipolar 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 Rate: 0.25, 0.5, 1, 2, 4, 8, 16, 32, and 64 kSPS

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

• Fault detection and device testing functions

• SPITM data interface and four general-purpose input/output interfaces

• Excellent ESD capability

• Packaging: QFP-64, BGA-64

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