ADS8344NB

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Data Acquisition - Analog to Digital Converters (ADC) is a crucial aspect of any industry that requires the conversion of a continuous physical variable into a digital form. These variable signals can represent anything from temperature and speed to pressure or energy. A device designed to facilitate this conversion isADS8344NB. This device is an analog-to-digital converter (ADC) that integrates high-speed, low-power, low-distortion, low-noise circuits to provide the performance required by many industrial applications.

Application Field

ADS8344NB is capable of providing a two-channel parallel A/D conversion for applications that require operation in harsh conditions. The device is suitable for use in embedded systems and high frequency acquisition systems requiring low power, low distortion, and low noise performance. Typical applications for the ADS8344NB include automotive, industrial automation, medical monitoring, instrumentation, and communication equipment.

Working Principle

The ADS8344NB combines an array of digital logic and circuitry on a 28-pin NSOP plastic package. The device’s core element is a high-performance, low-power, low-noise differential amplifier with variable gain, providing an excellent noise floor. The differential amplifier feeds a low-power/high-speed A/D converter, which operates in Parallel Data Acquisition (PDA) mode. The device is designed to deliver ultra-low-power consumption of less than 800 µA.

The A/D converter digitizes the input differential voltage on the INM and INP pins, samples the differential voltage at its nominal Nyquist frequency, and then converts the analog input signal into an 8-bit digital output. The device also includes a Code Lock Register with 8-bit data. This register allows the user to store a known level for comparison to the output of the A/D converted signal.

An external reference voltage, VREF, is supplied to the ADS8344NB to allow the converter to accurately convert the input signal into its digital equivalent, even with varying ambient temperature offsets present. The device also features Programmable Gain Selection, which enables the user to vary the converter’s gain depending on the application scenario.

The ADS8344NB also provides a high-frequency, low power external clock source. This clock source is used to control the data conversion rate, allowing the user to operate the device at speeds up to 250 kHz. A single power supply (VCC) is used to power the device and an internal clock oscillator is included to provide the aforementioned clock source.

In addition, the device features a thermal shutdown and an open-drain interrupt output. The input protection circuitry helps protect the device against ESD andelectrical fast transients, providing the necessary robustness for use in industrial applications.

Conclusion

To conclude, the ADS8344NB is a useful and highly efficient device for use in data acquisition applications requiring high performance and low power consumption. This device integrates low-noise and low-distortion circuits with a high-speed A/D converter, demonstrating unparalleled performance in various industrial and commercial applications.

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