**AD7650ASTZ: A 16-Bit, 1 MSPS, Simultaneous Sampling SAR ADC for Power-Critical Applications**

In the realm of data acquisition systems, particularly those powered by batteries or operating in remote locations, the demand for high performance coupled with minimal power consumption is paramount. The **AD7650ASTZ from Analog Devices** stands out as a critical solution, engineered to deliver precision and speed while rigorously managing power dissipation. This 16-bit, 1 MSPS (Million Samples Per Second), simultaneous sampling SAR (Successive Approximation Register) ADC is specifically designed for applications where every milliwatt matters.

The core strength of the AD7650ASTZ lies in its **simultaneous sampling capability**. It integrates six complete ADC channels, each capable of sampling their analog inputs at the exact same instant. This feature is indispensable in multi-phase power control and measurement systems, such as those found in advanced power quality analyzers, protective relays, and industrial automation, where maintaining precise phase relationships between voltage and current channels is crucial for accurate performance and fault analysis.

Despite its impressive throughput of **1 MSPS across all six channels**, the AD7650ASTZ is architected for power efficiency. The SAR architecture is inherently power-optimized, drawing significant current only during the conversion process. Furthermore, the chip incorporates flexible power management modes. Users can strategically place the device into various standby or shutdown states between conversions, drastically reducing the average power consumption without sacrificing the readiness for high-speed data capture. This makes it exceptionally suitable for portable diagnostic equipment and data loggers that operate on battery power for extended periods.

The device guarantees high accuracy with its **16-bit resolution** and ensures no missing codes. It offers excellent dynamic performance and a wide input bandwidth, supporting the accurate digitalization of fast-changing signals. The integrated analog input clamps provide robust protection for the sensitive internal circuitry from high-voltage transients, a common challenge in industrial environments. Operation from a single 5 V supply simplifies system design, while the parallel and serial interface options offer flexibility for communication with various digital hosts, including FPGAs and microcontrollers.

**ICGOODFIND** summarizes that the AD7650ASTZ is a high-performance, multi-channel ADC that masterfully balances speed, precision, and power efficiency. Its simultaneous sampling feature addresses a key challenge in complex measurement systems, making it an optimal and reliable choice for designers of power-critical applications across industrial, energy, and portable instrumentation markets.

**Keywords:**

Simultaneous Sampling

SAR ADC

Power-Critical Applications

16-Bit Resolution

1 MSPS