ADC12C080CISQ/NOPB

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Analog to Digital Converters (ADC) enable conversion of analog signals into digital signals. ADC12C080CISQ/NOPB is a general purpose, low power, single-channel, 8-bit successive approximation analog-to-digital converter (ADC) with an SPI compatible serial interface. It is designed to accommodate a wide variety of low power, low voltage analog input applications.

Application Field

The ADC12C080CISQ/NOPB is used to interchange analog and digital signals in data acquisition systems. It is suitable for use in the fields of industrial process control, medical devices, building automation, remote sensing and instrumentation, HVAC and transportation markets. This device can be used to measure analog signals such as temperature, pressure, flow, level, strain and force.

Working Principle

The ADC is based on a successive approximation architecture and features two reference inputs and two fast bipolar inputs. The analog input is sampled when the START pin is activated by the microprocessor, triggering the sample and hold capacitors which captures the input voltage. The successive approximation register (SAR) next appoints each bit of the 8-bit result code and sequentially compares it to the sample voltage until it is within the specified accuracy of 2 mV. Once the result code is determined, it is transferred to the data register, available for retrieval by the microcontroller via the serial output.

The ADC12C080CISQ/NOPB meets the accuracy requirements for low-level signal measurement in industrial control and consumer applications. It occupies minimal board space, requires minimal power and provides accurate, non-linearity-compensated input signals. It also features temperature-compensated reference voltage and channels with microcontroller selectable 25% higher accuracy.

The 8-bit output code is stored in the data register. The start/end logic of the part is capable of operating in two modes, mode 0 and mode 3. In Mode 0, the START pin goes low when the microprocessor requests data and high to initiate the next conversion cycle. In Mode 3, the START pin remains continuously high, and the conversion process is initiated when the microcontroller writes the conversion instruction on the data line.

The ADC12C080CISQ/NOPB is a low-cost, low-power device for measuring analog signals including thermocouples, temperature sensors and bridge sensors. It is durable, reliable and cost effective, suitable for use in most industrial, consumer and medical applications.

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