**AD7981HRMZ: A 1 MSPS, 18-Bit Precision PulSAR® ADC for High-Accuracy Data Acquisition Systems**

In the realm of high-performance data acquisition, the ability to accurately capture real-world signals with speed and precision is paramount. The **AD7981HRMZ from Analog Devices** stands as a pinnacle component in this field, representing a critical evolution in analog-to-digital converter technology. This 18-bit, 1 MSPS PulSAR® ADC is engineered to deliver exceptional performance in the most demanding measurement and control applications.

At its core, the AD7981HRMZ is built on Analog Devices' proprietary **PulSAR® (Successive Approximation Register) architecture**, which is renowned for its exceptional accuracy and low power operation without the latency typically associated with delta-sigma (ΔΣ) converters. This architecture enables the device to achieve true 18-bit resolution with no missing codes, ensuring every bit of the digital output is meaningful and reliable. The capability to sample at **1 million samples per second (1 MSPS)** provides system designers with the necessary bandwidth to capture fast-transient signals accurately, making it suitable for applications like precision instrumentation, medical imaging, and automated test equipment.

A key strength of the AD7981HRMZ lies in its outstanding **dynamic performance and accuracy**. It boasts a typical signal-to-noise ratio (SNR) of 96 dB and a spurious-free dynamic range (SFDR) of -110 dB, ensuring that even the smallest signals are digitized with clarity and minimal distortion from harmonics. Its exceptionally low power dissipation, consuming only 13 mW at 1 MSPS, makes it an ideal choice for portable, battery-operated systems where power efficiency is as critical as performance. Furthermore, the device features a versatile serial interface that is compatible with both SPI and DSP protocols, simplifying integration into a wide array of digital systems.

The integration of this ADC significantly enhances system-level design. It includes a high-performance, low-noise sample-and-hold amplifier and a proprietary reference buffer, reducing the number of external components required and thereby saving board space and overall system cost. Its operation from a single 2.5 V power supply simplifies power supply design, while its wide input bandwidth supports complex signal chains.

**ICGOOODFIND**: The AD7981HRMZ is a superior 18-bit ADC that masterfully combines high speed (1 MSPS), exceptional linearity, and low power consumption. Its PulSAR® architecture delivers precise, latency-free conversions, making it an indispensable component for engineers designing next-generation, high-accuracy data acquisition systems.

**Keywords**: High-Accuracy Data Acquisition, 18-Bit Resolution, 1 MSPS Sampling Rate, PulSAR® Architecture, Low Power Consumption.