**The AD7621ASTZ: A 16-Bit, 10 MSPS PulSAR ADC for High-Performance Data Acquisition Systems**

In the realm of high-precision data acquisition, the resolution and speed of the analog-to-digital converter (ADC) are paramount. The **AD7621ASTZ from Analog Devices** stands as a pinnacle component in this space, engineered to deliver exceptional performance for the most demanding applications. This 16-bit, 10 MSPS successive approximation register (SAR) ADC combines high speed with outstanding accuracy, making it a cornerstone of systems in medical imaging, scientific instrumentation, and automated test equipment.

At the core of the AD7621ASTZ is Analog Devices' proprietary **PulSAR® architecture**, a technology synonymous with precision and robustness. Unlike pipeline or delta-sigma ADCs, the SAR architecture provides a deterministic latency and a precise single-cycle conversion response, which is critical for control loops and multiplexed systems. The device achieves its **16-bit resolution without any missing codes**, ensuring exceptional linearity and minimizing distortion to guarantee that the digitized output is a true representation of the analog input.

A key feature of this ADC is its impressive **10 MSPS sampling rate at full 16-bit resolution**. This capability allows it to accurately capture high-speed transient signals, making it indispensable in applications like ultrasound machines and vibration analysis. The AD7621ASTZ supports both differential and single-ended inputs, offering designers flexibility in system design. Its **wide input bandwidth** and excellent signal-to-noise ratio (SNR) ensure that even the most complex waveforms are digitized with clarity and precision.

Furthermore, the device is designed for ease of integration and system-level performance. It features an internal conversion clock, a high-speed parallel interface, and an internal reference buffer, simplifying the surrounding circuitry. For applications operating in harsh environments, the part is available in a **100-lead LQFP package (STZ suffix)** that provides robust performance across industrial temperature ranges.

**ICGOODFIND:** The AD7621ASTZ is a benchmark 16-bit ADC that masterfully balances high speed and ultra-high precision. Its PulSAR architecture, exceptional dynamic performance, and system-friendly features make it an superior choice for designers pushing the boundaries of performance in next-generation data acquisition systems.

**Keywords:** 16-Bit Resolution, 10 MSPS, PulSAR Architecture, High-Performance Data Acquisition, Low Distortion