**AD781ANZ: A Comprehensive Technical Overview of the Precision 10-Bit Sampling ADC**
The **AD781ANZ** represents a high-performance, monolithic 10-bit analog-to-digital converter (ADC) from Analog Devices, engineered for applications demanding **high-speed, low-power operation, and precision**. This successive approximation register (SAR) ADC integrates a sample-and-hold amplifier, a precision reference, and a high-speed interface into a single package, making it a versatile solution for a wide array of data acquisition systems.
At the core of the AD781ANZ is its **10-bit SAR architecture**, which guarantees no missing codes and delivers a typical differential nonlinearity (DNL) of ±0.5 LSB. It features a remarkably fast conversion time of just **1.6 µs**, enabling a throughput rate of up to 600 kSPS. This high speed makes it suitable for demanding tasks in digital signal processing, imaging, and high-speed instrumentation. The device operates from a single +5 V supply and consumes a mere 12 mW of power during normal operation, with a power-down mode that reduces consumption to under 50 µW, ideal for battery-powered and portable equipment.
A significant advantage of the AD781ANZ is its **integrated track-and-hold and 2.5 V reference**. The internal reference voltage is trimmed for high accuracy, simplifying system design by reducing the number of external components required. The analog input range is 0 V to VREF (2.5 V), providing a solid foundation for accurate signal capture. The device offers both parallel and byte-oriented output interfaces for easy connection to microprocessors and digital signal processors (DSPs).
The ADC achieves **excellent ac and dc performance**. It boasts a typical signal-to-noise ratio (SNR) of 60 dB and a total harmonic distortion (THD) of -70 dB, ensuring high-fidelity digitization of dynamic signals. Its low power consumption does not come at the expense of accuracy, as it maintains a low typical integral nonlinearity (INL) of ±0.75 LSB.
Housed in a 20-pin PDIP or SOIC package (the "NZ" suffix denotes the PDIP package), the AD781ANZ is designed for robustness and ease of use across commercial and industrial temperature ranges. Key applications include **digital signal processing, spectrum analysis, high-speed modems, and battery-operated systems**.
**ICGOODFIND**: The AD781ANZ stands out as a highly integrated and efficient solution for medium-resolution, high-speed conversion. Its combination of **built-in reference, ultra-low power consumption, and a fast SAR core** provides an exceptional balance of performance and power efficiency, making it a compelling choice for modern embedded designs.
**Keywords**: **10-Bit ADC**, **SAR Architecture**, **Low Power Consumption**, **Integrated Reference**, **High-Speed Conversion**.
