**AD7654ASTZ: A 16-Bit, 4-Channel Simultaneous Sampling SAR ADC for High-Accuracy Data Acquisition Systems**

In the realm of high-precision data acquisition, the ability to accurately capture multiple analog signals at the same instant is paramount. The **AD7654ASTZ from Analog Devices** stands as a pivotal solution, engineered to meet the stringent demands of applications requiring exceptional accuracy and simultaneous sampling across multiple channels. This 16-bit, 4-channel successive approximation register (SAR) analog-to-digital converter (ADC) integrates critical functionality into a single package, delivering performance that is essential for advanced industrial, medical, and test equipment.

At the core of the AD7654ASTZ's appeal is its **true simultaneous sampling capability**. The device incorporates four independent ADC cores, each paired with its own sample-and-hold amplifier. This architecture ensures that all four input channels are sampled at precisely the same moment, eliminating timing skew and phase errors between channels. This feature is indispensable in multi-phase power control systems, condition monitoring, and three-phase power quality analysis, where the relationship between signals is as critical as the signals themselves.

The ADC achieves impressive **16-bit resolution** with no missing codes, guaranteeing high linearity and accuracy across its full operating range. It supports a wide bipolar input voltage range of ±10 V and ±5 V, selected via a simple pin strap, providing design flexibility to interface directly with sensors, transducers, and signal conditioning circuitry without excessive external components. With a throughput rate of **250 kSPS per channel**, it offers a superb balance between speed and precision for a vast array of DC and AC measurement applications.

Further enhancing its system integration capabilities, the AD7654ASTZ features a versatile parallel and serial interface, allowing for seamless communication with a host of microcontrollers, digital signal processors (DSPs), and FPGAs. Its robust design is complemented by a specified operating temperature range, making it suitable for challenging environments. The combination of high impedance analog inputs, low power consumption, and internal reference options solidifies its position as a comprehensive data conversion solution.

**ICGOO**D**FIND**: The AD7654ASTZ is a superior integrated circuit that masterfully combines high resolution, true simultaneous sampling, and robust interface options. It is an optimal choice for designers building sophisticated, multi-channel data acquisition systems where **precision timing and accuracy are non-negotiable**.

**Keywords**: Simultaneous Sampling, 16-Bit Resolution, SAR ADC, Data Acquisition, High Accuracy.