**The AD7652ASTZ: A 16-Bit, 1 MSPS, Simultaneous Sampling Dual SAR ADC**
In the realm of data acquisition systems, particularly those demanding precise multi-channel measurement, the ability to capture multiple input signals at the exact same instant is paramount. The **AD7652ASTZ from Analog Devices** stands as a pivotal solution in this space, integrating two high-performance analog-to-digital converters (ADCs) into a single package to achieve true simultaneous sampling. This 16-bit, dual-channel Successive Approximation Register (SAR) ADC is engineered for applications where timing alignment between channels is critical for accurate system performance.
At the core of the AD7652ASTZ's capability is its **simultaneous sampling architecture**. Each of its two channels features a dedicated sample-and-hold amplifier, ensuring that both input signals are captured at precisely the same moment. This eliminates phase skew and timing errors between channels, a common drawback of multiplexed ADCs, making it indispensable for applications like polyphase power metering, condition monitoring, and three-phase motor control.
The device delivers impressive performance with a **maximum throughput of 1 MSPS (Mega Sample Per Second) per channel**. This high-speed conversion rate, combined with its 16-bit resolution, ensures that even rapidly changing signals are digitized with exceptional accuracy and detail. The SAR conversion technique provides a deterministic latency and a "no pipeline delay" characteristic, which is crucial for fast control loops in industrial automation.
Designed for robustness and versatility, the AD7652ASTZ supports a wide **analog input range of ±10 V, ±5 V, and +10 V**, selectable via a simple pin-strap or software configuration. This flexibility allows it to interface directly with a broad array of sensors, transducers, and signal conditioning circuits without requiring external level-shifting components. The converter operates from a single 5 V supply and features high input impedance, simplifying system power design.
Furthermore, the device includes integrated reference and reference buffers, enhancing its accuracy and reducing the bill of materials (BOM) and board space. Its serial interface simplifies isolation and connection to modern digital signal processors (DSPs) and microcontrollers. Housed in a compact **64-lead LQFP package**, it is designed for space-constrained environments while maintaining excellent thermal performance.
**ICGOODFIND**: The AD7652ASTZ is a high-integration, precision dual ADC that masterfully combines **simultaneous sampling**, **high resolution**, and **high speed** to solve complex multi-channel measurement challenges. Its flexible input ranges and integrated features make it a superior choice for designing efficient and accurate data acquisition systems in demanding industrial, instrumentation, and energy applications.
**Keywords**: Simultaneous Sampling, 16-Bit Resolution, 1 MSPS, SAR ADC, Dual Channel.
