MAX134EQH+TD

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Data Acquisition (DA) is a necessary tool for many fields including healthcare, industrial, and telecommunications. In particular, Analog-to-Digital Converters (ADCs) and Digital-to-Analog Converters (DACs) are used to convert signals between analog and digital formats. Special purpose ADCs, such as the MAX134EQH+TD, have been developed in order to meet the needs of a variety of applications. This article will discuss the application field and working principle of the MAX134EQH+TD.

Application Field

The MAX134EQH+TD is a 10-bit true differential successive-approximation ADCs/DACs. This special-purpose system-on-chip (SoC) includes a digitally-controlled programmable gain amplifier (PGA), offset trimming, reference, and power management into a single device. This combination makes it ideal for applications including battery-powered hand-held devices, portable and instrumentation systems, and medical diagnostics/treatments.

The low power, small size, and low power dissipation of the MAX134EQH+TD make it an attractive solution for many applications. Its 15mW power consumption, 1.8V supply voltage, and ± 1LSB (10-bit) resolution make it the perfect choice for low-power applications. The small form factor and single-ended inputs also make it suitable for portable and hand-held applications. Additionally, the highly-integrated design of the MAX134EQH+TD eliminates the need for design complexity, making it ideal for rapid product development.

Working Principle

The MAX134EQH+TD is a Continuously-Multiplexed 10-bit Converter (CMXC) that uses successive-approximation and Compare (SAMC) to achieve conversion. The analog-to-digital conversion process begins with an external integrated potentiometer (IP) that is used to represent the analog input signal. This IP is then converted to a digital code using an SAR ADC. The digital code is then compared to the analog input signal using the compare block. Finally, the digital output is latched and the data is sent to the microprocessor.

The MAX134EQH+TD also has an integrated reference, temperature sensor, and offset trim register that allow for accurate, low-power conversions. The integrated temperature sensor can be used to adjust the offset trim value if the ambient temperature changes. The reference allows for the adjustment of the PGA gain, thus providing the option of increasing the gain when the input signal level is low.

Conclusion

In conclusion, the MAX134EQH+TD is a special-purpose ADC/DAC system-on-chip that is ideal for low-power applications. With its small size, low power dissipation, and integrated reference, temperature sensor, and offset trim register, it provides a simple, cost-effective solution for a variety of applications. Furthermore, its digitally-controlled PGA and compare functions make it well-suited for battery-powered hand-held devices, portable instruments, and medical diagnostics/treatments.

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