ADS800U

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Analog to Digital Converters (ADC) are critical components in data acquisition systems. The ADS800U is a 16-bit, single-channel, voltage input, analog to digital converter (ADC) with an oil-immersed, hermetic package. This article will discuss the application field and working principle of the ADS800U.

The ADS800U is suitable for applications including scientific instrumentation, industrial control, and process automation. It features wide dynamic range, high sampling rate, and low power consumption. With a ultra-low noise input amplifier and a wide operating temperature range of -55℃ to +125℃, it is capable of digitizing signals in a variety of industrial and environmental conditions. Moreover, a 24-bit total unadjusted precision is available, providing the highest level of accuracy.

The ADS800U operates with a single +5V power supply, consuming only 8.7mW per channel at 10kHz sampling rate. Its advanced power management architecture allows the user to achieve an optimized ratio between power consumption and performance. The device offers various power down modes and an automatic sleepmode triggered by zero input. This allows for an extremely low sleep current of 10 nA.

The ADS800U uses a resistive external differential input range of +10V to –10V, with a maximum input offset of ±0.25mV per channel. It can operate at sampling rates up to 40kSPS, with a conversion accuracy up to 24 bits unadjusted. The response time is less than 3μs. The full-scale differential output current is 6μA typ, with an absolute resolution of 0.18 pA. The device includes an I/O pin interface and an internal reference.

The working principle of the ADS800U is to measure an analog input voltage and convert it into a digital number. The analog voltage is first amplified by the internal gain stage and the amplified voltage is then converted into a linear digital value using a successive approximationregister (SAR) ADC. The SAR ADC gradually reduces the analog input voltage until its digital code matches the voltage, at which point the conversion is complete. This data is then processed and transferred to the memory for further processing.

The ADS800U also offers an on-chip temperature sensor which allows for automatic calibration of the ADC in order to maintain a specific accuracy level. The temperature sensor is used to measure the ambient temperature and then adjusts the full scale analogue range accordingly. This ensures that the ADC can still perform accurate measurements even in temperatures outside its specified operating range.

The ADS800U is a powerful and efficient ADC for a variety of industrial and environmental conditions. Its features make it ideal for power-sensitive applications and its onboard temperature sensor allows for precise temperature compensation, ensuring accurate measurements in varying temperature conditions. With its wide input range and low power consumption, the ADS800U is a great choice for data acquisition systems.

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