CDK3402CTQ48MTR

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Data Acquisition - ADCs/DACs - Special Purpose

CDK3402CTQ48MTR is a high performance, low-power (1.6mW) analog to digital converter with a resolution of 12-bit and an operating frequency of up to 1MHz. This ADC is designed for applications requiring low-noise, high-accuracy, and fast sampling times. It is a low-power solution for the sampling of analog signals in harsh environments with high frequency, harmonic distortion, and temperature swings.

CDK3402CTQ48MTR is designed to operate over a wide range of temperatures and environmental conditions. The converter utilizes a charge-based architecture and works off of a negative-differential capacitor array, enabling a low-power solution and excellent performance over temperature. This device integrates on-chip over voltage detection and thermal shutdown protecting the integrity of digital data.

CDK3402CTQ48MTR application fields include communications, industrial, and medical systems. This ADC can be used in analog-to-digital signal conversion, digital-to-analog signal conversion, and analog control systems. It is well-suited for applications requiring ac-coupled inputs, higher dynamic range, and fast conversion speeds. It is ideally suited for many different applications such as medical imaging, automotive and avionics systems, and portable electronics.

The working principle behind CDK3402CTQ48MTR is based on a charge-based ADC design. The figure below illustrates the underlying architecture. A capacitive array is used where each cell processes a single ADC bit. The array is fed from an input voltage, which is transformed into a charge. The array is scanned by two clock signals; one that controls the input conversion and one that controls the sampling times. For each clock cycle, a bit is sampled and stored in the result register. The result register is then read out to a digital output.

The capacitor array is composed of switchable capacitors, each containing a fixed capacitor and a programmable capacitor. The fixed capacitor is connected in parallel with the programmable capacitor, which is controlled by the input clock signal. When the clock transitions from low to high, the programmable capacitor is pushed to a high state. As the input charge increases, the system grounds the capacitor until it reaches a target state. The magnitude of the input voltage is then determined by the total charge stored on the capacitor array.

The analog-to-digital conversion process requires two steps. The first step is to determine the magnitude of the input voltage. Once the magnitude is determined, the second step is to quantize the input voltage into bits. Once the magnitude is quantized, these bits are read from the result register and outputted to the digital output.

CDK3402CTQ48MTR is a low-power, high-performance ADC for applications requiring low-noise, high-accuracy, and fast sampling times. It is well-suited for many different applications such as medical imaging, automotive and avionics systems, and portable electronics. The underlying architecture is based on a charge-based design, making it capable of operating over a wide range of temperatures and environmental conditions. By utilizing a negative-differential capacitor array, this device can perform analog-to-digital and digital-to-analog signal conversion, as well as analog control systems. Being a low-power solution, it is an ideal ADC for use in harsh environments.

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