ADS1259QPWRQ1

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ADCs (Analog-to-Digital Converters) play an important role in data acquisition and signal conversion. The ADS1259QPWRQ1 is an industry-leading low power 24-bit, 155kSPS, delta-sigma ADC specifically designed to serve high accuracy applications. It features integrated digital CT loop filter, track-and-hold, PGA, reference, and low jitter oscillator, making it ideal for industrial and consumer applications.

Applications

The ADS1259QPWRQ1 is a high-precision and wide flexibility ADC that can be used in a broad range of system configurations. It enables accurate, low-latency measurement of transducers, low-power sensing applications, and accurate signal acquisition in noisy environments. Its application field includes consumer and industrial pressure/flow/level/position/temperature/moisture/humidity sensors, automotive sensors, medical equipment, and portable industrial instrumentation.

Working Principle

The ADS1259QPWRQ1 employs the patented delta-sigma modulation architecture with a single-ended 24-bit resolution input signal. Its signal chain consists of an analog-front-end, a low-jitter oscillator, and a track-and-hold circuit which sample the input signal before being converted to digital data. The front-end filters provide noise suppression, while the track-and-hold captures an analog signal and provides a digital signal to the delta-sigma converter. The system converts these digital codes into a digital 24-bit differential voltage. This voltage is then sent to the power output stage, controlled by quantization noise model.

The power output stage converts the digital codes output by the delta-sigma modulator into a digital voltage. This voltage is then filtered with a CT loop filter which is integrated into the ADC. The filter provides superior performance in terms of distortion, noise-rejection, and accuracy. The filtered voltage then passes through the loop filter pre-amplifier stage to generate the analog output signal.

The ADS1259QPWRQ1 integrates a PGA (programmable gain amplifier) to provide improved linearity and accuracy while providing measurable user-definable gain settings. The reference voltage is compartmentalized, allowing the system to switch between different reference voltages. In addition, the output stage is designed with self-timed sequences that provide fast settling times, high accuracy, and low power consumption.

Conclusion

In conclusion, the ADS1259QPWRQ1 is a powerful and highly-flexible 24-bit ADC that is capable of delivering best-in-class performance in various demanding applications. Its unique combination of precision, ease-of-use, and power saving technologies allow it to serve a wide variety of applications. The integrated digital CT loop filter, track-and-hold, PGA, low jitter oscillator, and fast settling-time offers best-in-class accuracy and noise-rejection. This makes it well suited for sensing applications that require minimal design complexity and low system cost.

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