ADS8684IDBTR

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Analog to digital converters (ADC) change an analog signal, such as sound or light, into a digital representation for use in computers and other digital systems. An ADC is a vital component of such systems, allowing computers to take readings from the real world, which can then be processed. The ADS8684IDBTR is a high speed, ultra-low power 8-bit 1-GHz flash ADC from Texas Instruments.

Due to its high speed, low power, and wide operating temperature range, the ADS8684IDBTR is an ideal part for applications such as communications and audio processing, medical and scientific equipment, automotive telematics, and data acquisition systems. It offers an outlined analogue bandwidth of 1 GHz, and typical power consumption of as low as 2.7 mW per Msps. The device also features an wide operating temperature of -40 to 125 °C (-40 to 85 °C on the T version), making it suitable for use in a range of potential applications.

Working Principle

At a basic level, the ADS8684IDBTR functions by converting an analogue input signal into a digital representation. When an analogue signal enters the ADC, the voltage level of the signal is measured and compared to a reference voltage. This reference voltage is then divided into a number of discrete levels, and the input signal is then quantized into one of these discrete levels. The converter then produces a digital output code whose binary equivalent represents the amplitude of the input signal.

The ADS8684IDBTR features a single-slope architecture, an internal sample-and-hold stage and a voltage reference. This configuration provides a fast throughput of up to 1GHz, with a resolution of up to 8-bits and a signal-to-noise ratio (SNR) of up to 58dB. The signal-to-noise and distortion ratio (SINAD) is also impressive, reaching 60dB from DC to 0.5GHz, and 55dB from 0.5GHz to 1GHz. The converter also offers a wide common-mode voltage input range from 0V to 0.9V, and a differential nonlinearity of 0.5LSB.

In terms of its output, the ADS8684IDBTR allows for either dual analog out or digital, with an output data rate of up to 1GHz. The device also includes an internal voltage reference, an output register and an output control register. These components allow the user to customize the ADS8684IDBTR’s output in order to accommodate their specific application.

Conclusion

The ADS8684IDBTR is an ideal part for applications such as communications and audio processing, medical and scientific equipment, automotive telematics, and data acquisition systems. Its single-slope architecture and ultra-low power consumption make it a great choice for a range of applications. With an operating temperature range from -40 to 125 °C, an SNR of up to 58dB, and a differential nonlinearity of 0.5LSB, the ADS8684IDBTR is a great option for those looking to convert analogue signals into digital form.

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