MAX1138KEEE+

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Data Acquisition - Analog to Digital Converters (ADC) encompass a variety of technologies and products capable of converting analog signals into a digital format that can be read and used by computers. The MAX1138KEEE+ is a particular type of ADC which is becoming increasingly popular due to its wide range of applications. This article will explore its application field, as well as its working principle.

The MAX1138KEEE+ is a 16-bit resolution ADC that features an on-chip programmable gain amplifier for attenuator-based amplifiers and a self-calibrated reference. Its low-power operation makes it an ideal choice for applications that need low power and high performance, such as battery powered instruments and portable computers. It is also suitable for industrial and automotive applications such as motor control, instrumentation, and laser modulators.

The MAX1138KEEE+ has a wide input range of ±1.024V, and is capable of accepting single-ended and differential input signals. It has an onboard reference with a voltage accuracy of ±1.5%, and the on-chip PGIA provides selectable gain ranges between ±10V and ±0.5V. Its onboard temperature coefficient (TC) is ±5ppm/°C, allowing for improved TC and accuracy.

The MAX1138KEEE+ has a sampling rate of up to 4.75MSPS, making it suitable for high-speed data acquisition. It also has low SNR and low harmonic distortion, making it suitable for applications such as medical imaging and machine vision. Its power-down mode ensures low-power operation.

The MAX1138KEEE+ operates on a 5V power supply, and it has an integrated power-on reset circuit. It has a built-in interface to the common control bus and the SPI bus, allowing for remote control of the ADC. It is also software programmable, which is useful for applications that require frequent adjustments or tuning.

In terms of its working principle, the MAX1138KEEE+ uses successive approximation register-based conversion to perform the analog-to-digital conversion. In this process, the input voltage is applied to the conversion register and then compared to the reference voltage. A successive approximation is used to adjust the resulting digital code until a match is made, and the digital value is then read from the register.

In summary, the MAX1138KEEE+ is a 16-bit resolution ADC, capable of accepting single-ended and differential input signals. It features an on-chip programmable gain amplifier and a self-calibrated reference. Its low power consumption, wide input range, accuracy, and high-speed sampling rate make it suitable for a variety of industrial and automotive applications. The MAX1138KEEE+ uses successive approximation register-based conversion to perform the analog-to-digital conversion.

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