**AD7945BRSZ-REEL: A 14-Bit, 250 kSPS PulSAR ADC for Precision Data Acquisition Systems**

In the realm of precision data acquisition, the choice of Analog-to-Digital Converter (ADC) is paramount. It serves as the critical bridge between the analog physical world and the digital domain of processors and microcontrollers. The **AD7945BRSZ-REEL** from Analog Devices stands out as a premier solution, engineered to deliver high accuracy, exceptional performance, and robust operation in demanding applications.

This 14-bit ADC is built on Analog Devices' proprietary **PulSAR® architecture**, a charge-redistribution successive approximation register (SAR) technology renowned for its precision and stability. Unlike delta-sigma (ΔΣ) ADCs that can introduce latency due to their filtering nature, the SAR architecture provides a **deterministic response and no pipeline delay**, making the AD7945 ideal for multiplexed systems and control loops where speed and immediate data availability are crucial.

Operating at a speedy **250 kSPS (kilo Samples Per Second)**, the AD7945BRSZ-REEL effectively captures fast-changing signals. Its **14-bit resolution ensures superb dynamic performance**, characterized by outstanding INL (Integral Non-Linearity) of ±0.4 LSB typical and exceptional SNR (Signal-to-Noise Ratio) of 88 dB, guaranteeing that even the smallest analog signals are digitized with minimal error.

A significant advantage of this ADC is its remarkably **low power consumption**, drawing only 6.5 mW at 250 kSPS with a 5 V supply. This feature is indispensable for portable, battery-operated instruments, and high-channel-density systems where power dissipation is a primary design constraint. Furthermore, it offers a flexible power/throughput trade-off, allowing designers to reduce power consumption at lower sampling rates to optimize battery life.

The device incorporates a robust and versatile serial interface that is compatible with SPI, QSPI, MICROWIRE, and DSP standards, simplifying connections to a vast array of modern microcontrollers and processors. It also features a **pseudo-differential analog input** that can help mitigate the effects of common-mode noise, a common challenge in electrically noisy industrial environments.

Housed in a compact **10-lead MSOP package**, the AD7945BRSZ-REEL is designed for space-constrained applications without compromising on performance or functionality. Its specified operating temperature range of -40°C to +85°C ensures reliable performance across industrial and extended environmental conditions.

**ICGOOFind:** The AD7945BRSZ-REEL is a high-performance, precision ADC that masterfully balances speed, accuracy, and power efficiency. Its PulSAR architecture delivers instantaneous results with no latency, making it a superior choice for a wide spectrum of applications, including **industrial automation, precision instrumentation, medical diagnostics, data acquisition systems (DAQs), and battery-powered portable devices.**

**Keywords:** **14-Bit ADC**, **PulSAR Architecture**, **250 kSPS**, **Low Power Consumption**, **SPI Interface**.