Replace ADS1278 with GX1278 24-Bit Eight-Channel 256 KSPS ADC for Acoustic Measurement

Acoustic measurement is one of the important technologies in environmental monitoring, product quality inspection, and architectural acoustics. Modern acoustic measurement systems have shifted from single-channel sound pressure level measurement to multi-channel array acquisition. Since acoustic signals themselves have a large dynamic range (covering sound pressure levels from 20 dB to 140 dB) and a wide frequency range, the analog-to-digital converter chips used must have high resolution and a high signal-to-noise ratio. In addition, their algorithms require strictly synchronized sampling among channels, with inter-channel phase errors controlled within an extremely small range.

The Delta-Sigma architecture 24-bit ADC GX1278 can replace the ADS1278 in acoustic measurement systems. Its data output rate can support up to 256 kSPS. The chip internally includes functional modules such as a Delta-Sigma modulator, digital filter, serial data output, clock, logic control, and IO ports, making it very suitable for multi-channel acoustic measurement scenarios.

The GX1278 not only achieves precise DC measurement characteristics, but its AC-related performance is also at a relatively high level. The chip provides a total of five modes for users to choose from: ultra-high-speed, high-speed, high-precision, low-power, and low-speed. The corresponding operating mode can be entered through hardware configuration of the relevant pins. The on-chip integrated digital filter is responsible for converting the oversampled signal output by the analog-side Delta-Sigma modulator into a low-noise digital signal.

GX1278 Product Features:

Product dimensions and pin functions are compatible with the reference model, supporting Pin-to-Pin replacement of the ADS1278

Higher sampling rate, supporting up to 256 KSPS

Low power consumption, no heat sink required

Low sampling aperture error

Data can be read out through a serial interface, supporting both SPI and Frame-Sync interface protocols.

Supports cascaded data output from multiple chips and external synchronization, making it convenient for applications requiring more than 8 ADC channels

Uses a 64-pin LQFP package, with a supported operating temperature range of -55°C to +125°C