ISL26324FVZ

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Data Acquisition systems are crucial for signal processing and embedded system designs. The Analog to Digital Converter (ADC) is a key component of such systems. As the signal being measured typically is analog, it needs to be converted to a digital signal for further analysis. The ISL26324FVZ is an advanced and fully featured 24-bit delta-sigma ADC designed for high-accuracy signal acquisition in a variety of applications.

The ISL26324FVZ utilizes BiCMOS process technology and is packaged in a tiny 5mm x5 mm QFN package. The device has low power consumption 0.6mW (typical) and is configured with an integrated voltage reference along with an ultra-low noise sigma delta modulator. The ADC is fully buffered making it ready to accept signals directly from off-chip sources such as transducers, sensors, and light detectors.

The ISL26324FVZ consists of a true differential 24-bit delta-sigma modulator, a bandpass anti-aliasing filter, and a multi-bit serial interface. The device provides a sampling rate up to 10 MSPS. The modulator supports both bipolar (V_REF) and unipolar (V_REF/2) referencing. It features dual-conversion architecture for improved dynamic resolution of the many orders of magnitude of inputs. It has a programmable gain amplifier from 1 to 128 allowing input signals from 0 to 6V (V_REF) or 0 to 3V (V_REF/2). It offers integrated programmable digital filtering, including low pass and notch filters.

The ISL26324FVZ has several features that improve the accuracy and dynamic range of the device. The on-chip voltage reference has a 0.9 mV drift and a 0.1 % relative accuracy across the entire operating temperature range. The internal oscillator can be calibrated with an external one to ensure highest overall system accuracy. The reference offset calibration and the input offset calibration enable the system to compensate for input and reference errors. The onboard temperature sensor also helps the system to compensate for temperature variations.

The ISL26324FVZ is ideal for application in data acquisition systems and signal processing designs where high resolution, low noise performance and low power consumption are required. The device is an excellent choice for automotive, industrial control, instrumentation, audio, and robotics applications due to its high dynamic range and wide bandwidth. Its small package size makes it suitable for applications with limited space.

The working principle of the ISL26324FVZ involves the delta-sigma modulator converting the incoming analog signal into a single or multi-bit “word” which is then outputted and passed through a low-pass filter. The digital word from the modulator is amplified to the desired level, filtered if needed, and then sent to an ADC for further processing. The ADC then converts the incoming digital word into a digital number for further use in the system.

In summary, the ISL26324FVZ is a high-precision 24-bit delta-sigma ADC ideal for a wide range of data acquisition and signal processing applications. Featuring low power consumption, small package size and multiple integrated features, the ISL26324FVZ is suitable for embedded system designs and applications where accuracy, resolution and speed are critical.

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