**AD7495BRM: A Comprehensive Technical Overview of Analog Devices' 16-Channel 12-Bit SAR ADC**

In the realm of data acquisition systems, the ability to accurately and efficiently digitize multiple analog signals is paramount. The **AD7495BRM** from Analog Devices stands as a pivotal solution in this space, offering a highly integrated, **16-channel, 12-bit successive approximation register (SAR) analog-to-digital converter (ADC)**. This device is engineered to deliver high performance, flexibility, and reliability for a wide array of industrial, communication, and instrumentation applications.

Housed in a compact 10-lead MSOP package, the AD7495BRM is designed for space-constrained environments without compromising on functionality. Its core is a **high-speed, low-power SAR ADC** capable of throughput rates up to **1 MSPS (mega samples per second)**. This speed makes it suitable for applications requiring rapid multichannel sampling, such as power line monitoring, automated test equipment (ATE), and medical instrumentation.

A key feature of this ADC is its **16-channel multiplexer**. The multiplexer can be configured to handle either 16 single-ended inputs or 8 pseudo-differential input pairs, providing significant design flexibility to accommodate various sensor outputs and signal types. The on-chip sequencer allows for pre-programmed channel selection, enabling continuous conversion across a user-defined set of channels without requiring constant software intervention, thereby freeing up the system processor.

The **12-bit resolution** ensures sufficient dynamic range for precise measurement, delivering an effective number of bits (ENOB) that maintains accuracy across the full operating temperature range. The device typically exhibits excellent **DC accuracy** with ±1 LSB (least significant bit) integral nonlinearity (INL) and differential nonlinearity (DNL), ensuring no missing codes. Furthermore, it boasts a **wide power supply range from 2.7 V to 5.25 V**, allowing for seamless integration into both 3 V and 5 V systems.

The analog input range is from 0 V to VREF, and the reference voltage, which can be set between 100 mV and VDD, is applied externally, offering designers control over the ADC's full-scale range. The serial interface is SPI/QSPI/MICROWIRE/DSP compatible, facilitating easy connection to a vast majority of modern microcontrollers and digital signal processors (DSPs). For power-sensitive applications, the AD7495BRM features **automatic power-down modes** between conversions, reducing the typical supply current to just 1 µA during standby, which is critical for battery-operated portable devices.

Robust performance is guaranteed across the industrial temperature range (-40°C to +85°C), making it a dependable choice for harsh operating environments.

**ICGOODFIND:** The AD7495BRM is a highly integrated and versatile ADC solution that excels in system-level performance. Its combination of a **16-channel input multiplexer**, **high 1 MSPS throughput**, **low power consumption**, and **small form factor** makes it an outstanding choice for designers seeking to maximize channel density and efficiency in complex multichannel data acquisition systems.

**Keywords:** 16-Channel Multiplexer, 12-Bit Resolution, 1 MSPS, SAR ADC, Low Power Consumption.