AD7730BRUZ-REEL

AD7730 is a high performance, low power, multichannel, SigmaDelta A/D converter, containing two independent, simultaneous sampling, 24-bit A/D converters. AD7730BRUZ is one of the common variants that comes in reel packaging, making the device well-suited for automated board assembly. This article will focus on the application field and working principle of the AD7730BRUZ-REEL device.

Data Acquisition - Analog Front End (AFE)

The AD7730BRUZ-REEL can be used as part of an analog front-end (AFE) data acquisition system. The AFE system is used to amplify and condition signals prior to feeding them into a digital system. The AFE system typically consists of several building blocks such as high impedance analog inputs, low level sample and hold circuits, gain stages, voltage references and A/D converters. The AD7730BRUZ-REEL fits into the A/D converter role and is used to convert the analog input signals into digital output signals suitable for further processing by a digital system. The AD7730BRUZ-REEL can be viewed as an analog-to-digital bridge that converts electrical input signals into a digital output. The device accepts an analog input signal between 0 V – ±Vref (typically 4.096V). The signal is then digitised into a 24-bit digital output. The device also contains two independent independently sampling 24-bit A/D converters, allowing it to capture two simultaneous inputs at a sample rate of up to 160 KSPS. This allows for a high level of signal resolution and accuracy.

Working Principle

The working principle of the AD7730BRUZ-REEL is based on the Sigma-Delta (Σ-Δ) modulator architecture. This architecture is based on a feedback loop that is formed between the analog input, the comparator and the digital filter. The signal is first sampled and compared to a common reference voltage, yielding a single bit output. This bit is then digitally filtered by a low-pass filter resulting in a single-bit/multi-bit digital output. The frequency of the signal is determined by an on-board oscillator. The low-pass filter is designed to filter out any high-frequency noise or components above the sampling rate of the device (up to 160 KSPS). This ensures that only the useful signal components are digitised and the unwanted noise is filtered out. The AD7730BRUZ-REEL also contains several filtering options that can be used to further reduce the noise level in the output signal.

Conclusion

In conclusion, the AD7730BRUZ-REEL is an ideal A/D converter for automated board assembly, due to its compact package size and low power consumption. Furthermore, its Sigma-Delta modulator architecture allows for high resolution and accurate digitisation of the input signal, with noise suppression and multiple filter options to further improve the signal quality. As such, the AD7730BRUZ-REEL can be used for a variety of data acquisition applications such as in medical and industrial instrumentation.

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