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Data Acquisition - Analog to Digital Converters (ADC)

The AD7870KPZ-REEL is a general purpose, high speed and low noise analog-to-digital converter (ADC). It is part of Analog Devices’ higher precision semiconductor product portfolio. The AD7870KPZ-REEL combines a low-noise, high-performance 12-bit SAR ADC with a 1.8V to 5.5V input range, guaranteeing a maximum input voltage of 5V. It has two input ranges, a 2.4 Vpp to 0.3 Vpp positive input range and a 2.4V to -0.3V negative input range, both with a 0.1V offset. It also features a low-power, low-offset, high-resolution digital filter, which simplifies the design of solutions requiring accurate measurements over a wide range of frequencies.

The AD7870KPZ-REEL is ideally suited for applications that require measuring analog signals, as well as digital, switching, and RF signals. It also provides a high-resolution, high-speed analog-to-digital conversion solution. It is designed to support a wide range of applications including audio, IoT, motor control, medical and industrial automation, data converters, vision systems, intelligent systems, and instrumentation.

The AD7870KPZ-REEL features a high-speed, low-power 12-bit SAR ADC with a low-noise low-power 0.5MHz high-resolution digital filter. Additionally, the AD7870KPZ-REEL features a low-latency, low-power design, high sampling rate and low-jitter clock generator, and an Analog to Digital Conversion (ADC) rate of 2Msps. The AD7870KPZ-REEL is available in two packages, a small 6-pin LFCSP and a 6-pin SOIC package. The SOIC package has an externally adjustable full-scale input range.

The AD7870KPZ-REEL works by using two components in aloop-oriented architecture: a charge-modulation converter and a digital filter. The charge-modulationconverter converts an analog signal into digital codes, while the digital filter reconstructs the analog signal from the digital codes. The charge-modulationconverter is composed of an input multiplexer, sampling switch, charge-packer, reference buffer, and an analog-to-digital converter. The digital filter is composed of a digital filter storage register, multiplexer, latch, and output multiplexer.

The AD7870KPZ-REEL works by selecting the input signal to be measured, then the signal is sampled and the analog-to-digital converter is used to measure the signal, after that the digital filter is used to reconstruct the analog signal from the digital codes, that way it will be able to quantify the input signal. This ADC is able to sample input signals that can range from 2.4Vpp to 5Vpp.

The AD7870KPZ-REEL is a high-speed, low-noise 12-bit low-power SAR ADC and can be used in a wide range of applications such as audio, IoT, motor control, medical and industrial automation, data converters, vision systems, intelligent systems, and instrumentation. It works by using two components in a loop-oriented architecture, a charge-modulation converter and a digital filter. This ADC has a low-powered 0.5MHz high-resolution digital filter, with a low-latency, low-power design, and high sampling rate with low-jitter clock generator.

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