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March 2021

MAS6513 – 24-bit Capacitive Sensor Signal Conditioning IC

By News

Helsinki, Finland – 5 March 2021

MAS6513 – 24-bit Capacitive Sensor Signal Conditioning IC

Micro Analog Systems Oy introduces sensor signal conditioning IC primarily intended for humidity and pressure sensor modules. The MAS6513 can interface both single and dual capacitance sensors.

The heart of the IC comprises of a delta-sigma based capacitance to digital converter (CDC) with a high-resolution output (24-bit). Three different capacitance measurement modes are supported and the output can be proportional to capacitance difference (CS-CR), ratio (CS-CR)/CS or a sum (CS+CR). In addition to capacitance measurement the device has on-chip temperature sensor which is capable of measuring temperature in wide temperature range from -40 °C to +125 °C.

The device can operate in wide range of supplies from 1.9 V to 5.5 V and it has an extremely low current consumption down to 0.77 μA for one capacitance and temperature measurement in a second. This makes it an ideal solution for battery powered and power critical applications. 

Built-in 24-bit calculation engine produces calibrated high-resolution output which can comprise of up to 3rd order linearization and 2nd order temperature compensation of sensor capacitance value and up to 2nd order linearization of the on-chip temperature sensor signal. The device includes a 512-bit EEPROM memory for storing capacitive sensor front-end trim values and calibration coefficients on-chip.

The MAS6513 can run measurements either command based (One shot mode) or automatically (Continuous mode). Optional interrupt output can be configured to given an interrupt when new results are available or when any result has exceeded programmable alert limits. Communication via standard 2-wire I2C bus and 4/3-wire SPI serial interfaces is supported.

Samples are available as dies and in DFN-12 3x3x0.75 package. For further information and samples, please contact Micro Analog Systems Oy at