ADS8861IDGSR

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Analog-to-digital converters (ADCs) are devices used to capture physical signals in the analog domain and convert them into digital signals that allow further use and processing. The ADS8861IDGSR is an 8-bit ADC designed for industrial field applications. In this article, we discuss the application field and working principle of the ADS8861IDGSR ADC.

The ADS8861IDGSR is a low power ADC with an analog input range of 0 to 4.095V, rated input bandwidth 700kHz, sampling rate up to 21 MSPS, and a high resolution of 8-bits. It is optimized for industrial applications such as industrial data acquisition, consumer electronics and automotive applications. Furthermore, it is designed with a user-selectable differential non-linearity (DNL) of ±1 LSB and a typical integral non-linearity (INL) of ±1 LSB. This makes it ideal for applications which require reliable and accurate conversion of analog input signals to digital signals.

The ADS8861IDGSR ADC has a three-stage architecture consisting of Analogue Front-end (AFE), Analogue-to-Digital Converter (ADC), and Digital Noise-shaping Filters (DNFs). The AFE contains a signal conditioning stage, an amplifier stage, and a peak detector. The signal conditioning stage amplifies the signal, before it is passed through the amplifier stage, which utilizes a nominally optimized rail-to-rail operational amplifier. The peak detector makes sure that the signal is correctly captured by sampling its peak within the sampling interval. The ADC is based on a folding and interpolation architecture, coupled with a sub-range technique, and is used to accurately convert the analog signal to a digital signal. The Digital Noise-shaping Filters are used to reduce the out-of-band noise and improve the signal-to-noise-and-distortion ratio.

The ADS8861IDGSR has several added features to make it ideal for industrial applications. It utilizes a 1.8V power supply, which minimizes the overall power consumption, and the power-down mode reduces the input sample current down to 5µA. The device also supports different code assignments, using various power and digital control modes. This allows for more efficient use of the ADC in different applications. The device also supports multi-stage calibration, allowing for adjustment of gain and offset within the ADC.

The ADS8861IDGSR is a great ADC for industrial applications. It has a low power rating, and provides accurate and reliable conversions of analogue signals to digital signals. The features such as power saving, digital control modes and calibration combined with the high resolution and sampling rate make it a great choice for industrial applications.

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