LTC1865HMS#PBF

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Data Acquisition - Analog to Digital Converters (ADC)

Analog to digital converters (ADCs) are essential components of a variety of applications such as medical devices, industrial and automotive control systems, and even specialized consumer electronics. The LTC1865HMS#PBF is one type of ADC which can be used in a broad range of applications. In this article, we will discuss the application field and working principle of the LTC1865HMS#PBF.

Application Field

The LTC1865HMS#PBF is a 12-bit successive-approximation register analog-to-digital converter (SAR ADC). It is available in skinnyDIP, SOIC, and TSSOP packages, and operates from a +2.7V to +5.5V single supply. This device is designed for both automotive and standard applications.

The ADC offers highly accurate data conversions with 0.5LSBINL (Integral Non-Linearity) and 0.2LSBSDNL (Differential Non-Linearity) performance at fCLK = 30 MHz. It is ideal for digital panel meters, test equipment, and applications requiring precision such as radiation levels in hospital operation rooms, industrial control systems, and automotive control systems.

The LTC1865HMS#PBF offers numerous features such as an on-chip digital calibration, a flexible over-range indicator,a Temperature Sensor Input (TSI) and a Shutdown Mode. The ADC also includes an analog reference, reference bypass, data ready output enable and a gap detector, features which enable its usage in demanding applications.

Working Principle

The ADC employs a successive-approximation register (SAR) architecture, which is suited for low power, low cost data conversion. It uses a simple three-step process for data conversion: configuration, acquisition, and conversion.

The configuration step involves initializing the registers that control the reference voltage, the conversion clock, and the resolution of the data. It sets the registers to the desired values, prior to entering the data acquisition phase.

In the data acquisition step, the ADC acquires the input signal. This is done by measuring the sample time, which is set based on the speed and accuracy of the ADC conversion.

Finally, in the conversion step, the ADC performs the conversion from the analog input signal to a digital number. This is done by comparing the analog input signal to a reference voltage. The ADC then produces a binary number, which is then converted to a digital output code.

The LTC1865HMS#PBF provides an easy and cost-effective way to convert analog signals to digital signals for various types of applications. It offers accuracy and performance, making it an ideal choice for data acquisition purposes.

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