LTC2290CUP#TRPBF

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Data Acquisition - Analog to Digital Converters (ADC)

The LTC2290CUP#TRPBF, a low-power, high-accuracy, low-noise analog-to-digital converter (ADC), is a useful tool for most data acquisition tasks. It has a 8-bit resolution and can be used in both single-ended and differential data acquisition applications. It is optimized for low-voltage and low-power applications and is housed in a 3mm x 3mm QFN package.

The LTC2290CUP#TRPBF includes a low-power, low-noise continuously auto-calibrated (CAC) Delta-Sigma ADC, a digital signal processor (DSP), and an on-board voltage reference. It has an input range of -2V to +2V and a fully-differential input. It is powered through a low-noise source and has an internal programmable gain amplifier (PGA) with gains of 1, 2, 4, 8, 16, 32, 64, or 128. It also has an internal temperature sensor.

Application Field

The LTC2290CUP#TRPBF is suitable for a variety of data acquisition tasks, including:

• High-accuracy signal measurements
• Low-power sensing applications
• Portable device design
• Consumer and industrial applications
• Medical device design
• Automotive systems design
• Audio/video applications

Working Principle

At the heart of the LTC2290CUP#TRPBF is a low-power, low-noise CAC Delta-Sigma ADC. The ADC is a single-bit data converter which uses a high-pass digital filter to reject out-of-band noise. This provides excellent dynamic range and low distortion for single- and multi-tone signals. The ADC is continuously auto-calibrated to remove any offset and temperature drift, ensuring consistent and accurate results.

The input signal is amplified by the low-noise PGA, which provides gains from 1 to 128. The PGA is followed by a sample-and-hold circuit which allows the input signal to be held constant while the ADC progresses through its conversion process. The ADC also has an internal temperature sensor which ensures that the conversion results are accurate even in ambient temperatures.

Once the ADC has finished its conversion process, the data is sent to the on-board DSP, which digitally filters the data to remove any noise and performs gain-scaling adjustments as needed. The output of the ADC is then sent to the on-board voltage reference, which is used to scale the voltage levels of the output data.

Conclusion

The LTC2290CUP#TRPBF is a low-power, high-accuracy, low-noise analog-to-digital converter - an ideal solution for a broad range of data acquisition tasks. Its low-power consumption makes it suitable for portable device design, while its wide range of gain settings makes it suitable for a variety of applications. The low-noise design ensures high-accuracy results, while the internal auto-calibration feature helps to maintain consistent and accurate results over time.

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