**AD7490BRUZ-REEL7: A 16-Channel, 1 MSPS, 12-Bit SAR ADC for Precision Data Acquisition Systems**

In the realm of precision data acquisition, the ability to accurately digitize multiple analog signals with high speed and resolution is paramount. The **AD7490BRUZ-REEL7** from Analog Devices stands out as a highly integrated solution designed to meet these demanding requirements. This 16-channel, 12-bit successive approximation register (SAR) analog-to-digital converter (ADC) delivers a **high sampling rate of 1 MSPS** (Million Samples Per Second), making it an excellent choice for a wide array of industrial, medical, and communication applications.

The core of the AD7490's performance lies in its SAR architecture, which is renowned for its **precision and deterministic latency**. Unlike delta-sigma (ΔΣ) ADCs that require filter settling time, the SAR ADC provides a complete conversion result after a fixed number of clock cycles. This feature is critical for control systems and multiplexed applications where timing is exact and immediate data is necessary. The 12-bit resolution ensures fine granularity in the digital output, enabling systems to discern minute changes in the analog input signal.

A key advantage of the AD7490 is its **high level of integration**. By incorporating a 16-channel multiplexer, a track-and-hold amplifier, the ADC core, and a serial interface into a single package, it significantly reduces the component count and board space required for complex multi-channel systems. This integration simplifies design logistics, lowers overall system cost, and enhances reliability. The on-chip multiplexer can be configured to handle either 16 single-ended or 8 differential inputs, offering flexibility to interface with various sensor types and signal sources.

The device operates on a single 2.7 V to 5.25 V supply, making it suitable for both portable, battery-powered equipment and robust industrial platforms. Its low power consumption is a standout feature, drawing only 13 mW typical with a 5 V supply and 4.5 mW with a 3 V supply at maximum throughput. Furthermore, it features a flexible power-down mode that reduces consumption to just 1 µW, ideal for applications where power efficiency is critical.

Communication with a microcontroller or DSP is streamlined through a **high-speed serial interface** (SPI/QSPI/MICROWIRE/DSP compatible), which facilitates easy isolation and reduces noise coupling in electrically noisy environments. The AD7490 is offered in a compact TSSOP-28 package, ensuring a small footprint for space-constrained designs.

**ICGOO**DFIND: The AD7490BRUZ-REEL7 is a highly capable and integrated ADC that combines **high channel count, fast conversion speed, and excellent accuracy**. Its combination of **low power consumption** and a small form factor makes it a superior choice for designers building efficient and compact precision data acquisition systems.

**Keywords:** SAR ADC, 1 MSPS, 16-Channel Multiplexer, Low Power Consumption, Serial Interface.