**AD7660ASTZ: A Comprehensive Technical Overview of the 16-Bit 570 kSPS PulSAR® ADC**

The **AD7660ASTZ** from Analog Devices represents a pinnacle of performance in the realm of high-precision data acquisition. As a **16-bit, 570 kSPS successive approximation register (SAR) analog-to-digital converter (ADC)**, it is engineered for applications demanding both high speed and exceptional accuracy. This monolithic ADC leverages the proprietary **PulSAR® architecture**, which is renowned for its precision and stability, ensuring no missing codes over the entire operating temperature range.

Housed in a compact **48-lead LQFP or LFCSP package**, the AD7660ASTZ is designed for robust operation in industrial environments. Its core functionality is built around a **highly accurate internal conversion clock**, which eliminates the need for external timing components and simplifies design-in. A key feature is its **integrated analog input clamp protection**, safeguarding the device from overvoltage transients that are common in harsh electrical environments. Furthermore, it offers **outstanding AC performance**, typified by a high signal-to-noise ratio (SNR) of typically 91 dB and very low total harmonic distortion (THD), making it ideal for precision measurement and spectrum analysis.

The ADC operates from a single **5 V power supply** and features a versatile parallel and serial interface, providing flexibility for communication with various microprocessors and digital signal processors (DSPs). Its power dissipation is strategically managed; it consumes a mere **95 mW during normal operation** and features multiple power-down modes, reducing consumption to **150 µW in full shutdown**, which is critical for portable and battery-powered equipment.

The **on-chip reference and reference buffer** are significant advantages, offering excellent stability and low drift. Designers can also choose to utilize an external reference for applications requiring even higher precision or specific reference characteristics. The device guarantees **excellent linearity**, with a maximum ±2.5 LSB INL (integral non-linearity) error, ensuring that digital outputs are a faithful representation of the analog input.

**ICGOODFIND**: The AD7660ASTZ stands as a benchmark for 16-bit ADCs, masterfully combining high throughput with PulSAR® precision. Its integrated features, including the reference, clock, and protection circuits, significantly reduce the external component count and design complexity. This makes it an exceptionally reliable and efficient solution for a wide array of demanding applications in medical instrumentation, industrial process control, high-end data acquisition systems, and precision test and measurement equipment.

**Keywords**: 16-Bit ADC, PulSAR® Architecture, 570 kSPS, Integrated Reference, Low Power Consumption.