Highest resolution 18-bit ADC in SOT-23

NewsSouth-East European INDUSTRIAL Мarket - issue 1/2007

Introduced as the highest resolution analogue-to-digital converter available in a 6-pin SOT-23 package, Microchip announced the low-power 18-bit Delta-Sigma MCP3421 ADC. The device 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 a I2C compatible serial interface, operates from a single power supply (2.7V to 5.5V), and consumes just 155uA 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; and consumer applications such as weigh scales and handheld meters, and automotive sensor interfaces and fuel gauges, says the company.