**AD7658BSTZ-1: A 16-Bit, 8-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 **AD7658BSTZ-1** from Analog Devices stands as a pivotal solution, engineered to meet the stringent demands of complex industrial, medical, and test/measurement systems. This integrated circuit is a **16-bit, 8-channel, simultaneous sampling SAR ADC** that combines high resolution with exceptional channel density, setting a benchmark for performance in multi-channel systems.
At the core of the AD7658BSTZ-1's functionality is its **simultaneous sampling capability**. Each of its eight input channels is connected to an internal sample-and-hold amplifier, all of which are triggered at the exact same moment upon receiving a convert command. This feature is critical in applications like polyphase power metering, vibration analysis, and multi-axis motor control, where understanding the precise phase relationship between different signals is essential. By capturing all channels concurrently, it eliminates timing skew and provides a true "snapshot" of the system's state, leading to more accurate and reliable data.
The device leverages the **Successive Approximation Register (SAR)** architecture, which is renowned for its determinism and high speed without pipeline delays. The AD7658BSTZ-1 can achieve a throughput of up to **250 kSPS** for all eight channels, delivering a massive aggregate data rate. This makes it not only accurate but also fast enough for a wide range of dynamic signal acquisition tasks. Its **16-bit resolution** ensures excellent dynamic performance and a wide dynamic range, minimizing noise and allowing for the discernment of minute signal details.
For system designers, the ADC integrates several features that simplify design and enhance performance. It operates from a single **5 V supply** and accommodates true bipolar input ranges (±10 V, ±5 V), which is highly desirable in industrial environments. The built-in **2.5 V reference** and reference buffer are key to achieving specified accuracy and reducing external component count. Furthermore, the serial interface is designed for easy connection to modern microcontrollers and DSPs, supporting both SPI and daisy-chain configurations for efficient data retrieval in multi-ADC systems.
Robustness is another hallmark of this converter. It is designed to operate reliably in harsh electromagnetic environments and is specified over the industrial temperature range (-40°C to +85°C), making the AD7658BSTZ-1 a durable choice for field-deployed equipment.
**ICGOOODFIND**: The AD7658BSTZ-1 is an exceptional integrated circuit that masterfully addresses the challenge of acquiring multiple high-accuracy analog signals simultaneously. Its combination of high channel count, true simultaneous sampling, robust 16-bit resolution, and system-level integration makes it an indispensable component for engineers designing the most demanding data acquisition systems.
**Keywords**: **Simultaneous Sampling**, **16-Bit Resolution**, **SAR ADC**, **8-Channel**, **Data Acquisition System**
