**AD7124-4BRUZ-RL: A Low-Noise, Low-Power 24-Bit Sigma-Delta ADC for Precision Measurement Applications**

In the realm of precision measurement, the performance of the analog-to-digital converter (ADC) is paramount. The **AD7124-4BRUZ-RL** from Analog Devices stands out as a premier solution, engineered to deliver exceptional accuracy and stability for the most demanding applications. This 24-bit sigma-delta (Σ-Δ) ADC integrates critical signal conditioning components, making it an ideal, compact core for high-resolution data acquisition systems.

At the heart of its design is an ultra-**low-noise programmable gain amplifier (PGA)**. This allows the ADC to handle a wide range of input signal amplitudes directly from sensors like strain gauges, RTDs, thermocouples, and pressure transducers without requiring extensive external amplification. With gains from 1 to 128, it can resolve minute signals with incredible precision.

A key strength of the AD7124-4BRUZ-RL is its remarkable flexibility. It features **two matched programmable excitation current sources** for directly stimulating sensors such as RTDs, simplifying system design and reducing component count. Furthermore, it includes a precision **low-drift internal 2.5 V reference**, eliminating the noise and errors associated with an external reference circuit and enhancing overall measurement stability.

Power efficiency is a critical differentiator. The device operates with a typical power consumption of only **255 µA at full power mode and a mere 75 µA in low power mode**, making it exceptionally suited for portable, handheld, and battery-powered instrumentation where longevity is crucial. Despite its low power draw, it does not compromise on performance, offering a superb **noise level as low as 9.5 nV√Hz**.

The integrated digital filtering is highly configurable, allowing designers to optimize the trade-off between **output data rate (from 1.17 SPS to 19.2 kSPS)** and noise rejection. This enables the ADC to effectively suppress line cycle interference (50 Hz/60 Hz) in industrial environments, ensuring clean and reliable data.

**ICGOODFIND:** The AD7124-4BRUZ-RL is a highly integrated, precision ADC that masterfully balances ultra-low noise, minimal power consumption, and exceptional integration. It significantly reduces design complexity and bill of materials (BOM) for engineers developing sophisticated measurement systems in medical devices, industrial process control, and test and equipment.

**Keywords:** Low-Noise, Low-Power, 24-Bit Sigma-Delta ADC, Precision Measurement, Programmable Gain Amplifier (PGA)