AD9281ARS

Number of A/D Converters:	2
Base Part Number:	AD9281
Supplier Device Package:	28-SSOP
Package / Case:	28-SSOP (0.209", 5.30mm Width)
Operating Temperature:	-40°C ~ 85°C
Features:	Simultaneous Sampling
Voltage - Supply, Digital:	2.7 V ~ 5.5 V
Voltage - Supply, Analog:	2.7 V ~ 5.5 V
Reference Type:	External, Internal
Architecture:	Pipelined
Series:	--
Ratio - S/H:ADC:	1:1
Configuration:	S/H-ADC
Data Interface:	Parallel
Input Type:	Differential, Single Ended
Number of Inputs:	2
Sampling Rate (Per Second):	28M
Number of Bits:	8
Part Status:	Active
Packaging:	Tube

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Data Acquisition - Analog to Digital Converters (ADC)

Analog-to-Digital Converters (ADCs) convert a continuous analog signal into a series of discrete digital values. This process is useful for transforming signals from the physical world, such as audio, temperature and voltage, into a form which can be analyzed and processed by computers. AD9281ARS is an Ultra Low Power 14-bit 125MS/s Analog to Digital Converter (ADC). It is a highly integrated ADC solution that features minimal footprints, very low power consumption, and high performance. This article will discuss the application field and working principles of AD9281ARS.

Applications of AD9281ARS

The AD9281ARS is well suited for a wide range of applications, such as medical device systems, portable biomedical systems, and battery powered instruments. It is also suitable for low power, high accuracy communications and automotive applications. This ADC is an ideal solution for any application requiring a high performance, low power digital front-end.For medical device systems, the AD9281ARS offers excellent dynamic performance and low power consumption. It is capable of converting analog signals up to 500ksps and has 14-bits resolution for accurate data acquisition. Its ultra-low power consumption makes it an ideal choice for powering patient monitoring and portable medical systems.Portable biomedical systems are also benefited from the AD9281ARS. Its power efficiency and anti-glitch capability make it suitable for low power, low noise systems. It also features wide input range and high speed conversion, making it ideal for applications requiring high accuracy and data rate.Battery powered instruments benefit from the AD9281ARS due to its low power consumption. The ADC\'s high speed conversion allows for fast data acquisition of analog signals, while its wide input range makes it suitable for signals coming from various sources. In addition, its integrated sigma-delta modulator makes it a good candidate for power-sensitive applications.The AD9281ARS is also suitable for low power, high accuracy communications and automotive applications. Its low power design is ideal for embedded applications where power is limited. Its integrated sigma-delta modulator also enables low jitter performance over a wide frequency range, making it suitable for high speed communications.

Working Principle of AD9281ARS

The AD9281ARS is an ultra low power Analog to Digital Converter that utilizes a capacitive array multistage delta-sigma architecture to convert analog signals into discrete digital data. The ADC is a single-ended device featuring a single reference input of up to 500kHz.The ADC supports a wide range of input range, from 0 to 3.3V for input voltage and 0 to 10V for output voltage. It features low noise, fast sampling, and plenty of dynamic range. The ADC can convert up to 1000ksps and offers 14-bits resolution for high accuracy and precision.At the core of the AD9281ARS is a multi-stage delta-sigma architecture, which utilizes capacitive arrays to convert the analog input signal into a digital stream of data. This is done by measuring the difference between the analog input voltage and a reference voltage, and then implementing a high-speed modulator that produces digitally encoded pulses.The output of the modulator is then fed into a decimating filter, which converts the pulsed output stream into a digital data stream. This digital data stream is then converted into a standard digital format by a low pass filter and digital-to-analog converter (DAC).

Conclusion

The AD9281ARS is an ultra low power, highly integrated Analog to Digital Converter (ADC) solution. It offers 14-bits resolution for high accuracy and precision, and a wide input range for signals from various sources. Its low power design and anti-glitch capability make it suitable for medical device systems, portable biomedical systems, battery powered instruments, and low power, high accuracy communications and automotive applications. The ADC utilizes a capacitive array multi-stage delta-sigma architecture to convert analog signals into discrete digital data.

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