ADS6125IRHB25

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Analog-to-Digital Converters (ADC) allow an analog signal to be converted into a digital representation of that signal. The ADS6125IRHB25 is one example of an ADC, specifically designed for applications requiring higher speed and resolution. This article will explore the application field and working principle of the ADS6125IRHB25.

ADS6125IRHB25 Application Field

The ADS6125IRHB25 is a 25-bit Delta-Sigma ADC designed for applications requiring higher resolution such as medical imaging, signal processing, and scientific instrumentation. This device is especially well-suited for the measurement of signal sources with fast edges, such as those from a photodiode or CT scanner. Additionally, the ADS6125IRHB25 can support conversion rate up to 2MSPS which is ideal for high-speed capture of fast signal sources. As a SAR (Successive Approximation Register) ADC, the ADS6125IRHB25 offers excellent DC accuracy as well as high differential nonlinearity (DNL) and integral nonlinearity (INL) performance. The differential nonlinearity (DNL) of the ADS6125IRHB25 is typically +/- 0.5 LSB and integral nonlinearity (INL) is typically +/- 2LSB. The ADS6125IRHB25 also features a highly integrated architecture, with the logic and analog blocks optimized for low-noise performance and high-bandwidth operation.

ADS6125IRHB25 Working Principle and Internal Blocks

At its most basic, the ADS6125IRHB25 works by converting an analog input voltage into a Digital code. This is accomplished by the internal blocks of the ADS6125IRHB25, which consist of a voltage reference, modulator, quantizer, timing and control logic, and output register.

The input signal is first passed through a differential amplifier and then fed into the modulator. The modulator is a Sigma-Delta type architecture that converts the input signal into a sequence of pulses whose widths vary as a function of the input signal’s amplitude. This sequence of pulses is then fed into the quantizer, which is responsible for quantizing the modulator output and then outputting the digital code. The code is then sent to the output register, which is responsible for storing the digital code and regulating its output.

The ADS6125IRHB25 also includes several features that enable the device to operate at higher speeds and accuracy. These include the use of advanced loop filters, an undersampling mode, and a charge-sharing mechanism to reduce noise. Additionally, the ADS6125IRHB25 is designed to minimize the power and area requirement without sacrificing performance.

Conclusion

In summary, the ADS6125IRHB25 is a 25-bit Delta-Sigma analog-to-digital converter that is designed for higher-speed and higher-resolution applications. This device has a wide variety of features that enable it to operate at higher speeds and accuracy, while minimizing power and area requirement. The ADS6125IRHB25 is especially well-suited for medical imaging, signal processing, and scientific instrumentation and is capable of a conversion rate of up to 2MSPS.

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