GXSC Analog-to-Digital Converter Replaces LTC2175 in Test Instruments

Test instruments are specialized devices used to measure, analyze, and evaluate the performance of materials or systems. Through data processing and analysis, they provide reliable foundations for product R&D optimization, production quality control, and scientific data validation. These instruments are widely applied across multiple fields including scientific research and laboratories, industrial manufacturing, environmental monitoring, electronics, and communications.

High-speed, high-precision, multi-channel signal acquisition technology is the core driver for upgrading test instruments. The GXSC ADC features multi-channel synchronous sampling capability, high-speed sampling rates, outstanding accuracy and dynamic performance, while also balancing low power consumption and miniaturization. It is highly suitable for the design requirements of various portable and benchtop test instruments.

The GXSC ADC is specifically engineered for digitizing high-frequency signals with wide dynamic range. These devices excel in demanding precision instrumentation and communications applications, delivering AC performance including 73.1dB SNR and 88dB spur-free dynamic range (SFDR). Ultra-low jitter of 0.15ps RMS enables IF frequency undersampling and exceptional noise performance. DC specifications include ±1 LSB INL (typical) across the entire temperature range, ±0.3 LSB DNL (typical), and no missing codes. Conversion noise is exceptionally low at 1.2 LSB RMS.

The GXSC ADC‘s digital output employs serial LVDS to minimize data lines. Each channel outputs two bits simultaneously (“dual-lane” mode). A single-bit-per-channel option is available at lower sampling rates (“single-lane” mode). The LVDS driver features selectable internal termination and adjustable output levels to ensure clean signal integrity. The chip can drive the ENC+ and ENC- inputs differentially or single-ended using a sine wave, PECL, LVDS, TTL, or CMOS input. An internal clock duty cycle stabilizer achieves high performance at full speed and across multiple clock duty cycle conditions.

Key Features of the GXSC Analog-to-Digital Converter:

14-bit 125Msps, 4-channel low-power A/D converter

Serial LVDS Output: 1 or 2 lanes per channel

18V Single Supply

Low Power: 636mW (total), 159mW (per channel)

No Missing Code

Flexible Input: 1Vp-p to 2Vp-p Range

800MHz Full Power Bandwidth

Integrated Clock Duty Cycle Stabilizer

Supports Shutdown and Snooze Modes