MAX5316GTG+T

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Data acquisition, the process of capturing, measuring and interpreting data, is the cornerstone of countless industrial applications, featuring automation and control systems, energy management and process monitoring. Digital to analog converters (DACs) are integral components of such systems, as they enable digital systems to interact with or control analog loads, such as temperature and pressure sensors, actuators and motors.

Texas Instruments’ MAX5316GTG+T is a family of 16-bit, low power and low voltage DACs that offer a high degree of accuracy and robust performance in challenging data acquisition applications. This family of devices is well-suited for factory automation, transportation and health monitoring.

Applications

The MAX5316GTG+T family of DACs is designed to drive thermocouples and RTDs and operate in industrial as well as consumer environments. Additionally, these devices can measure dampers, valves, pumps and other types of load cell. Specifically, they offer the following features:

• Rich feature set and integrated voltage reference
• Low power processing of up to 6 mW
• Optimized noise reduction technologies
• 12-bit programmable output range and high speed
• Low leakage current of 0.25 μA
• Integrated digital interface
• 16-bit voltage buffering
• Programmable low temperature offset compensation

The MAX5316GTG+T’s integrated voltage reference ensures an accurate and stable output voltage or current. Furthermore, the programmable output range allows for improved performance and flexibility when connecting multiple analog channels.

Working Principle

The MAX5316GTG+T family of DACs uses sigma-delta conversion principle to convert digital words into analog. This process is centered on two components, the digital modulator and the analog output filter.

The digital modulator is responsible for transforming the digital signal into a pulse-density modulated output. This modulator operates on a 1-bit-resolution ADC, which actively runs at higher frequencies than the input signal. This higher frequency exchange affords great noise rejection capabilities due chip-level quantization and noise filtering. The resulting output at the modulator stage is then sent to the analog filter, which removes the imposed noise and shapes the signal into a cleaner, more accurate output.

The output filter further shapes the signal, creating a low-pass filter that functions as an anti-aliasing filter. The filter removes the unwanted noise and ensures an undistorted reproduction of the input signal. The higher order sigma-delta conversions guide the formation of more accurate output signals. In a nutshell, the digital modulator and analog output filter work together to produce accurate, low noise, and low power signals.

Conclusion

The MAX5316GTG+T family of optimized 16-bit data acquisition DACs from Texas Instruments offers superior accuracy, robust performance and low power consumption in a wide range of industrial applications. The MAX5316GTG+T utilizes sigma-delta conversion principle and an integrated voltage reference to provide a stable and accurate output, making it the ideal data acquisition and measurement solution for temperature, pressure and other such applications.

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