PCM1681PWPG4

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The PCM1681PWPG4 is an analog to digital converter (ADC) that belongs to the special purpose category in data acquisition. It is an 8-bit successive approximation register (SAR) ADC with a power consumption of 150mW that integrates a 1.5V internal reference. The PCM1681PWPG4 from Texas Instruments contains an operational amplifier (OA), fixed capacitors, and a comparator all in a 12-bit integrated device.

The PCM1681PWPG4 provides a high speed, yet low noise and high accuracy analog-to-digital conversion solution for a number of applications. It is suitable for use in medical imaging, optical applications, and voice recognition systems, among many other applications. The device offers the ability to integrate devices using left-or right-justified data alignment for digital output. It comes in a tiny TSSOP-16 package, and makes it suitable for portable applications.

The PCM1681PWPG4 is also characterized by its exceptional low power consumption, high speedsampling, low cost and wide dynamic range. The integrated internal reference ensures excellent regulation with no need to use an external reference voltage. This makes it much easier to design arrays of this ADC since the internal reference voltage can be shared with other adjacent circuits.

The PCM1681PWPG4 supports both single-ended and differential inputs, allowing users to select the most suitable analog input range for their application. The device has a sampling rate of up to 200kHz, a resolution of 8 bits and a wide dynamic range of 0 to 13.7V. This makes it applicable for a variety of analog sensing and signal processing applications.

In terms of working principle, the PCM1681PWPG4 uses an SAR conversion architecture to convert analog signals into digital signals. This ADC works by comparing an analog input voltage with a reference voltage calibrated to the input voltage range. In each sampling cycle, the device determines if the input voltage is higher or lower than the reference voltage. Depending on this comparison, the device then changes the digital output accordingly.

This cycle is repeated until the device reaches the desired resolution, in this case 8 bits. The device outputs an 8-bit digital word corresponding to the analog input, representing the converted value. The device also provides several features that reduce power consumption and increase accuracy, such as a power down mode and an offset null mode.

The PCM1681PWPG4 is an excellent choice if you are looking for a low cost, low power consumption ADC that can handle high speed sampling and provide an accurate and wide dynamic range. And with the integrated internal reference and left- or right-justified data alignment, it makes a great choice for a number of applications.

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