ISL267450IBZ

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Analog to digital converters (ADCs) are a critical component in any data acquisition system, converting analog signals into fill digital values that can then be further processed, acted upon, or stored for future examination. The ISL267450IBZ is a precision, high performance, single-channel 24-bit analog-to-digital converter (ADC) from Intersil Corporation. It is designed for high-accuracy measurement applications where long-term accuracy and low noise performance are required. This article will discuss the applications and working principles of the ISL267450IBZ.

Applications of the ISL267450IBZ

The ISL267450IBZ is ideally suited for precision data acquisition and measurements, for example, in process control and data acquisition systems, and in medical instrumentation. It can also be used for a wide range of industrial automation and control systems, where measurement of very small signals with high precision is needed. It is specifically designed to measure low frequency signals that require long settling times. It has a built-in temperature sensor that allows the user to correct for the effects of ambient temperature.

In addition, the ISL267450IBZ has an internal oscillator and PGA (Programmable Gain Amplifier), allowing it to be used in applications that require remote or distributed sensing and data conversion. This makes it ideal for low-power, long-range applications such as remote weather stations and environmental monitoring.

Working Principle of the ISL267450IBZ

The ISL267450IBZ is a single-ended low frequency sigma-delta ADC. This type of ADC operates by converting a continuous waveform signal into a series of voltage levels. The voltage levels are then converted into numerical representations of the waveform. The resolution of the ISL267450IBZ is 24-bit, with a dynamic range of up to 95 dB.

In sigma-delta ADCs, the analog signal is first filtered to remove low-frequency noise and then sampled at a sampling rate that is higher than the Nyquist frequency. After sampling, the signal passes through a sigma-delta modulator, which converts it into a series of ones and zeros. The ones and zeros are then converted into a digital code, which is the output of the sigma-delta ADC.

The ISL267450IBZ uses a proprietary programming method to reduce noise and improve performance. It uses a multi-rate sampling technique, which enables the ADC to sample at different frequencies. This technique helps to reduce the noise that is usually present in a signal as it is being acquired. It also features an adaptive gain control algorithm that adjusts the signal sensitivity based on the signal strength, further reducing noise and improving accuracy.

The ISL267450IBZ has a wide signal input range (up to 1 V), making it suitable for signal conditioning and signal isolation. Its low power consumption (0.85 mW) and small size (0.7 mmx0.7 mm) make it ideal for applications requiring portability and low energy consumption.

In summary, the ISL267450IBZ is a high-precision ADC with a wide signal range and high dynamic range, making it suitable for a wide range of applications. It uses a sigma-delta conversion method, which ensures high accuracy even in low signal strength environments. Its onboard oscillator and PGA allow it to be used in applications requiring remote or distributed sensing and data conversion. Its low power consumption and small size make it ideal for low-power, long-range applications such as remote weather stations and environmental monitoring.

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