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Mixed Signal/Analog

Microchip Introduces 18-bit Delta-Sigma Analogue-to-Digital Converter in SOT-23 Package

22nd December 2006

ES Admin

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Microchip announces the highest resolution analogue-to-digital converter available in a 6-pin SOT-23 package. The low-power, 18-bit, Delta-Sigma MCP3421 ADC features an integrated voltage reference, oscillator and Programmable Gain Amplifier (PGA), which reduce the need for external components and enables a smaller overall design.

The MCP3421 ADC uses an I2C™ compatible serial interface, operates from a single power supply (2.7V to 5.5V), and consumes just 155μA during continuous conversion at 5V. In addition, the device’s onboard PGA allows users to select gains of x1, x2, x4 or x8 before the A-to-D conversion takes place, enabling very high-resolution conversion of even small input signals.

Example applications for the MCP3421 ADC include industrial products such as portable instrumentation, pressure sensors, weigh scales, handheld meters and multimeters; medical applications such as heart rate monitors and blood glucose meters; consumer applications such as weigh scales and handheld meters, and automotive sensor interfaces and fuel gauges.

The MCP3421 ADC Device is available to sample now at sample.microchip.com, and in volume at www.microchipdirect.com. In addition, for designers wanting to evaluate the MCP3421, Microchip offers the MCP3421 Evaluation Board (Part number MCP3421EV) which is also available to purchase at www.microchipdirect.com.