AD42/206-0

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Analog-to-digital converters (ADCs) are devices used to convert analog signals such as temperature, pressure, sound, and other physical parameters into discrete digital numbers. The AD42/206-0 is a particular two-channel analog-to-digital converter designed specifically for applications where the conversion of low-frequency, low-level analog signals is required. This ADC offers exceptional performance, with accurate 16-bit resolution conversion and sample rates up to 500 kHz for each channel with no missing codes.

The AD42/206-0 is a sigma-delta converter with a low-power, low-noise linear transconductor amplifier and a high speed, low-power clock divider. It offers a reference voltage of up to 4.096 V and a gain of up to 20 V/V. The analog input range is normally programmable between ± 5 to ± 50 mV, and an internal reference divider gives an options of ±100, ±200, ±400 and ±800 ppm accuracy.

The main application field of the AD42/206-0 includes earthquake monitoring, industrial process monitoring, geographical audits, seismology, automotives safety systems, supercharger control systems, and other precision data monitoring applications, where accurate and low-noise operation is of primary importance. This ADC is suitable for any area of research that requires accurate acquisition of low-frequency, low-level analog signals.

The working principle of the AD42/206-0 is based on the sigma-delta modulator, which uses a so-called 1-bit A/D inherent counter. This counter sets the desired analog-to-digital resolution by counting the number of times a sigma-delta modulated signal has to reach its peak voltage before the output is changed from 0 to 1. It performs the conversion of the analog input signal at the same time that it sets the resolution.

The value of the modulated sigma-delta signal is determined by the free running oscillator and the reference clock, which is used to determine the rate of the conversion and determine the number of bits of resolution. The number of digital output bits can be adjusted by increasing or decreasing the reference clock frequency. As a result, the low-frequency resolution of the AD42/206-0 is up to 16 bits and can achieve a resolution of up to 20 V/V.

The AD42/206-0 offers a range of digital output formats that conform to various standards, including serial data, parallel data and single-ended or differential outputs. The digital output directly connects to the user’s system using either a standard serial or parallel interface. The dual-channel architecture of the ADC allows simultaneous sampling of two analog inputs, ensuring that both channels always have identical timing and output characteristics.

In conclusion, the AD42/206-0 is a two-channel analog-to-digital converter that provides exceptional performance and accuracy with low-frequency, low-level analog signals. It is suitable for applications where accurate acquisition of data is of primary importance, such as earthquake monitoring, industrial process monitoring, geographical audits, seismology and automotives safety systems. The AD42/206-0 also offers a range of digital output formats, and its dual-channel architecture allows simultaneous sampling of two analog inputs.

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