**AD7793BRUZ-REEL: A Comprehensive Guide to the Low Noise, Low Power 24-Bit Sigma-Delta ADC**

In the world of precision measurement, the ability to accurately capture small analog signals is paramount. The **AD7793BRUZ-REEL** from Analog Devices stands as a pinnacle of this capability, representing a complete front-end solution for low-frequency measurement applications. This 24-bit Sigma-Delta Analog-to-Digital Converter (ADC) integrates critical components on a single chip, offering designers an unparalleled combination of **ultra-low noise, minimal power consumption, and high integration**.

At the heart of the AD7793's performance is its **low-noise, 24-bit Sigma-Delta core**. This architecture is specifically engineered for DC and low-frequency AC measurements, such as those found in strain gauge bridges, thermocouples, and RTD (Resistance Temperature Detector) systems. With an effective resolution of up to 21.7 bits (peak-to-peak resolution) and an RMS noise level as low as 40 nV at a 4.17 Hz update rate, it excels at resolving the most minute signal changes. This makes it an ideal candidate for high-precision industrial process control, portable instrumentation, and medical equipment.

A key feature that sets the AD7793 apart is its **remarkably low power consumption**. The device operates from a single 2.7 V to 5.25 V supply and consumes only 400 µA typical current during normal operation. Furthermore, it includes a power-down mode that reduces current consumption to a mere 1 µA. This attribute is indispensable for **battery-powered and portable applications** where extending operational life is a critical design constraint.

The integration level of the AD7793 significantly simplifies system design. The chip incorporates a precision, low-noise instrumentation amplifier, allowing it to directly interface with low-level output transducers like strain gauges without requiring extensive external signal conditioning. Additionally, it features an on-chip **low-drift, internal reference** (typical drift of 4 ppm/°C), which eliminates the need for an external reference component, saving both board space and cost. The device is offered in a compact 16-lead TSSOP package and communicates via a simple 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP protocols.

Designers can configure the AD7793 for a wide range of applications through its programmable gain amplifier (Pain ranges from 1 to 128) and selectable output data rates (from 4.17 Hz to 470 Hz). Its built-in clock oscillator and flexible calibration modes (internal zero-scale and full-scale, system calibration) ensure accuracy over temperature and time.

**ICGOOODFIND**: The AD7793BRUZ-REEL is a superior choice for designers seeking a high-precision, low-power data acquisition solution. Its exceptional noise performance, integrated features, and low power envelope make it a versatile and reliable ADC for the most demanding measurement challenges in industrial, medical, and portable systems.

**Keywords**: **24-Bit Sigma-Delta ADC**, **Low Noise**, **Low Power Consumption**, **Integrated Precision Instrumentation Amplifier**, **On-Chip Reference**.