**AD7661ASTZ: A Comprehensive Technical Overview of the 16-Bit, 250 kSPS PulSAR ADC**

The **AD7661ASTZ** from Analog Devices represents a pinnacle of precision data conversion technology, integrating a high-performance, **16-bit, 250 kSPS successive approximation register (SAR) ADC** into a compact package. Designed for applications demanding high accuracy and speed, this PulSAR® ADC combines advanced architectural features with robust performance, making it a cornerstone component in industrial instrumentation, medical imaging, and high-end data acquisition systems.

At the core of the AD7661ASTZ is its **proprietary PulSAR architecture**, which ensures no missing codes over the entire operating temperature range and guarantees exceptional linearity. The device achieves a remarkable **signal-to-noise ratio (SNR) of 91 dB** and a total harmonic distortion (THD) of -100 dB, enabling precise digitization of analog signals with minimal error. Its **250 kilosamples per second (kSPS) throughput rate** allows for rapid data capture, critical for real-time processing applications.

The ADC operates from a single 5 V power supply and features a versatile analog input range, including **bipolar ±VREF settings**, with an externally configurable reference voltage up to 3.5 V. This flexibility facilitates seamless integration into diverse system designs. Additionally, the AD7661ASTZ incorporates a high-speed parallel interface and an internal conversion clock, simplifying timing management for designers.

Low power dissipation is another highlight, with the device consuming just **35 mW during normal operation**, reducing thermal concerns in densely packed systems. Its **-40°C to +85°C industrial temperature range** ensures reliability in harsh environments. The 48-lead LQFP package (STZ) offers a balance between size and thermal performance.

**ICGOOODFIND**: The AD7661ASTZ stands out as a high-accuracy, high-speed ADC solution, delivering **exceptional linearity**, **low noise**, and **robust performance** for demanding applications. Its blend of speed, precision, and power efficiency makes it an ideal choice for engineers developing next-generation measurement and control systems.

**Keywords**: 16-Bit ADC, 250 kSPS, PulSAR Architecture, High Precision, Low Power Consumption.