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AD7793BRU

AD7793BRU Description

The AD7793BRU from Analog Devices Inc. is a high-precision, 24-bit sigma-delta analog-to-digital converter (ADC) designed for low-frequency measurement applications. Housed in a 16-pin TSSOP package, it integrates a PGA (Programmable Gain Amplifier), enabling direct sensor interfacing with minimal external components. The ADC operates with differential inputs and supports both external and internal voltage references, providing flexibility in system design. Its SPI/DSP-compatible interface ensures seamless integration with microcontrollers and digital signal processors.

AD7793BRU Features

• 24-bit resolution for ultra-high precision in low-frequency signal acquisition.
• 3 differential inputs with a built-in PGA (gain: 1–128), ideal for sensor signal conditioning.
• Low power consumption with dual supply ranges (2.7V–5.25V analog/digital).
• Sampling rate up to 470 SPS, optimized for slow-varying signals like temperature or strain.
• Internal/external reference options (1.17V internal or external up to supply voltage).
• SPI/DSP interface for easy digital communication.
• Obsolete status but remains reliable for legacy designs, with MSL 1 (unlimited shelf life).

AD7793BRU Applications

The AD7793BRU excels in precision measurement systems requiring low noise and high resolution, such as:

• Industrial process control: Weigh scales, pressure sensors, and RTD/thermocouple interfaces.
• Medical instrumentation: Portable ECG monitors and blood glucose meters.
• Energy monitoring: Smart meters with shunt-based current sensing.
• Automotive sensors: Battery management systems (BMS) and torque sensing.
  Its PGA and differential inputs make it superior for environments with common-mode noise, outperforming lower-resolution ADCs in signal integrity.

Conclusion of AD7793BRU

Though marked obsolete, the AD7793BRU remains a robust choice for high-accuracy, low-speed data acquisition. Its 24-bit resolution, flexible reference options, and integrated PGA reduce system complexity while maintaining performance. Engineers in industrial, medical, and automotive fields can leverage its precision for legacy or niche designs, despite newer alternatives. For applications demanding uncompromising SNR and stability, the AD7793BRU delivers enduring value.