ADC1112D125HN/C1:5

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Data Acquisition is the process of gathering data from both physical and digital sources, such as sensors, micro-controllers, processors, or other digital devices. Analog to Digital Converters (ADC) are used to convert the measured physical parameters into digital signals which can be further processed by the processor. ADC1112D125HN/C1:5 is one such device which is used in many data acquisition applications.

The ADC1112D125HN/C1:5 is a monolithic multi-channel analog-to-digital converter with 12-bit resolution and a 1:5 input range. It is a low power, high accuracy converter suitable for multiple operations in the 0 – 4.096 V range. The device features a maximum sampling rate of 125 kHz, an on-chip index reference, and low-power operation using two external control pins. The ADC1112D125HN/C1:5 also offers an input multiplexer, an auto-zero/calibration amplifier, a sample-and-hold circuit and a high-performance 12-bit A/D converter designed for minimal distortion and low power applications.

The device offers two separate reference inputs, one for the index and one for the input multiplexer. The index input provides the reference voltage to program the output voltage range, while the multiplexer input can be used to directly apply a reference voltage to the sample-and-hold storage capacitor. This allows the sampling rate to be scaled according to the application requirements.

The main application field of the device is in data acquisition. The device can be used in medical diagnosis systems, process control systems, machine monitoring applications, and other industrial applications. The amplifier and ADC architecture provides excellent noise and linearity performance, meaning the device can be used with high accuracy and low distortion. The 125 kHz sampling rate is suitable for most data acquisition applications.

The working principle of the ADC1112D125HN/C1:5 is based on the SAR (successive approximation) architecture. In this architecture, the analog input is converted into a digital output by successively comparing the analog input against a series of reference voltages. The reference voltages are generated by a reference voltage generator. The ADC1112D125HN/C1:5 uses the index input to program the reference voltage generator. The device also has a multiplexer input which applies an offset to the reference voltage generator, allowing for better performance in multiplexed applications.

The analog-to-digital converter begins its operation by retrieving the initial value^Mfrom the reference voltage generator. It then compares this voltage against the analog input. Depending on the result, the algorithm is repeated until the residual error is within acceptable limits. Once the optimum value is found, the result is stored in a memory location and the conversion is complete. The result is then read out in digital form at the appropriate output pin.

In conclusion, the ADC1112D125HN/C1:5 is a low power, high accuracy device which is suitable for many data acquisition applications. Its SAR architecture and external controls make it easy to program for various applications. The 125 kHz sampling rate is also suitable for most applications. The device provides excellent imaging and linearity performance, making it suitable for applications requiring high accuracy and minimal distortion.

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