Single-channel 10-bit analog-to-digital converter GX9215 replaces AD9215 for use in spectral analysis

In fields such as environmental monitoring and biomedicine, spectral analysis technology can accurately analyze the composition and structure of substances. In the core signal processing chain of spectral analysis equipment, the analog-to-digital converter serves as the “bridge” for converting analog signals to digital signals, determining the quality of spectral data and the accuracy of analysis results. The GXSC GX9215 is a single-channel 10-bit 105 MSPS multi-stage differential pipeline architecture ADC, making it the optimal solution to replace the AD9215.

The core of spectral analysis lies in capturing subtle differences in light signals to analyze material properties. During spectral signal acquisition, the analog signals output by photodetectors are often extremely weak and susceptible to environmental noise interference. This requires the ADC to have ultra-high resolution and excellent signal-to-noise ratio. Traditional solutions typically use ADI‘s AD9215, but the GXSC GX9215‘s low-noise performance makes it the preferred ADC solution for high-performance spectrometers.

The GX9215 is a single-channel, 10-bit, 105 MSPS ADC featuring a multi-stage differential pipeline architecture, an integrated high-performance sample-and-hold circuit, and an on-chip reference voltage source. It operates on a 3V analog power supply, and a separate output power supply can drive logic circuits operating at 2.1V to 3.6V.

The GX9215 is specifically designed for digitizing high-frequency, wide-dynamic-range signals, making it ideal for demanding spectroscopic analysis and communication applications. At 105 MHz sampling, it achieves a signal-to-noise ratio of 62 dB and a spur-free dynamic range of 72 dB. DC specifications include ±0.8 LSB INL (typical), ±0.25 LSB DNL (typical), and no missing codes. The chip‘s input-referred noise is extremely low, at just 0.4 LSB RMS.

GX9215 performance parameters:

• Flexible input range: 1 Vp-p to 2 Vp-p

• Low power consumption: 215 mW (105 MSPS)

• Differential nonlinearity (DNL): ±0.25 LSB (typical)

• Input reference noise: 0.4 LSB RMS

• On-chip reference voltage source and sample-and-hold circuit

• Package type: QFN-32

Finally, in terms of package type, both the GX9215 and AD9215 support QFN-32 packaging, with pin-to-pin compatibility, allowing for direct board replacement.