MAX1134BCAP+

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Data Acquisition - Analog to Digital Converters (ADC)

Analog to digital converters (ADCs) help bridge the divide between analog and digital processing circuits by taking an analog signal as the input and outputting a digital representation of it. The Maxim Integrated Exchange ADC, the MAX1134BCAP+, is one example of such a product available on the market.

This ADC is a low-cost, ultra-small, 3.2V to 5V powered, 8-bit successive approximation register (SAR) ADC with an integrated voltage reference. With a single-cycle conversion and a user selectable conversion rate from 1ksps to 50ksps, the MAX1134BCAP+ is the ideal solution for applications that require both an accurate measurement and high throughput.

The MAX1134BCAP+ is a flexible ADC, which is suitable for a variety of applications, including data acquisition, metering, portable instrumentation, product test, and automated test equipment.

The working principle of the MAX1134BCAP+ is relatively simple. To acquire a digital representation of an analog voltage, the successive approximation register (SAR) algorithm is implemented. This involves comparing the input voltage against the resistor-string representation of the chosen resolution of the ADC output data.

The determined difference between the voltage and the resistor-string determines the bit pattern the input will produce. After each conversion, the value stored in the SAR is compared to an external reference voltage, and if the voltage is greater than or equal to the reference value, then the highest bit of the SAR is set, otherwise it is cleared. The comparison is repeated until all of the bits of the SAR have been set.

The integrated voltage reference that comes with the MAX1134BCAP+ contains a regulated bandgap reference, a reference buffer circuit, and a rail-to-rail input and output amplifier to provide accurate references for the voltage range of the ADC. The internal reference also allows for reference tracking between different conversion channels, eliminating the need for external references.

The internal reference and the low number of external components required make the MAX1134BCAP+ one of the most cost-effective solutions available on the market. It not only provides a low-noise, high-resolution digital output, but is also robust, low power, and contains integrated features such as temperature compensation, which increases accuracy and temperature stability.

Overall, the MAX1134BCAP+ is an ideal choice for applications in the data acquisition, metering, portable instrumentation, product test and automated test equipment fields, due to its accuracy, low-cost, high throughput, and low power requirements.

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