PCM1742KE/2K

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The PCM1742KE/2K is a special-purpose data acquisition instrument that is used to measure, analyze and control data in real-time applications. It is a high-performance 16-bit, 2K sample/s analog-to-digital converter (ADC) and digital-to-analog converter (DAC).

The PCM1742KE/2K can be used as an ADC and DAC in many applications, such as medical imaging, high-speed instrumentation, data collection and analysis, and data acquisition systems. It is suitable for direct integration into embedded systems with integrated FPGAs, DSPs, and microcontrollers, and is also suitable for high-speed analog-to-digital and digital-to-analog conversion with a maximum sample rate of 2K samples per second (S/s). With its excellent dynamic range, the PCM1742KE/2K can be used for low-level signal conditioning, AD/DA conversion, and digital filtering.

The PCM1742KE/2K features a multi-channel Analog Front End (AFE) that enables multiplexed simultaneous acquisition of multiple analog channels. By partitioning the AFE, the sample rate per channel can be optimized according to application requirements. Additionally, the PCM1742KE/2K includes an FPGA that can be programmed to perform specialized custom processing tasks. It has an optimized data highway architecture that enables flexibility and scalability.

The working principle of the PCM1742KE/2K is based on the sampling and quantization process. In the sampling process, a continuous analog signal is divided by a sequence of discrete values and converted into a digital signal. Quantization is the process of encoding these discrete values into numbers for digital computers to interpret. The PCM1742KE/2K uses a 16-bit sigma-delta ADC that can convert an analog input signal into a digital output signal with an accuracy of up to 16 bits. The ADC operates in the sigma-delta modulation mode, in which an analog signal is sampled, quantized and encoded into a digital output.

The PCM1742KE/2K utilizes a dual-loop noise-shaping architecture to improve dynamic range and accuracy. The dual-loop architecture consists of two main parts, a coarse loop and a fine loop. The coarse loop has a static gain stage that is used to reduce the range of the input signal. The fine loop uses a feedback control technique to provide noise shaping and dynamic range extension.

The DAC used in the PCM1742KE/2K is a 16-bit current-mode DAC that converts digital data into analog signals. The data is stored in a digital-to-analog converter (DAC) register and then converted into a current signal. The DAC transfers the digital data to an analog current output signal with a resolution of 16 bits. The DAC output is buffered to keep the output clean and distortion free.

The PCM1742KE/2K provides a flexible and reliable solution for data acquisition, analysis and control applications. The device is ideal for applications that require low-level signal conditioning, high-speed data acquisition, and digital filtering. The PCM1742KE/2K offers the performance, flexibility, and scalability needed for today\'s demanding data acquisition and control tasks.

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