Sensor Signal Interfaces

MAS

MAS6502 Piezoresistive Sensor Signal Interface IC

MAS6502 is a 16 bit Analog-to-Digital Converter (ADC) designed for piezoresistive sensor modules. It’s designed especially to meet the requirement for low power consumption, thus making it an ideal choice for battery powered systems.  Current consumption values of 2.3 µA (one pressure conversion in a second) or less can be achieved. The 256-bit EEPROM memory stores trimming and calibration coefficients on chip.

In addition to pressure measurement the device can be configured for temperature measurement using the external sensor bridge and the built-in sensor sampling switches. An advantage with this is that the temperature is measured directly on the bridge and not on the IC which means the IC doesn’t need to be placed directly beside the sensor bridge.


MAS6505 22-bit Low Power Low Noise Piezoresistive Sensor Signal Interface IC

MAS6505 is a high resolution sensor signal interface IC designed for piezoresistive sensor modules. Analog Front-End (AFE) comprises of a chopper amplifier having input noise down to 0.27uVrms. The 22-bit Analog-to-Digital Converter (ADC) employs delta-sigma conversion technique with high resolution performance. It can operate from a very wide range of supply voltages (1.71V…5.5V) and it has extremely low current consumption (down to 0.8uA, one measurement in a second) which make it an ideal solution for battery powered applications. Temperature sensing either from sensor bridge resistance or external diode are both supported. 512-bit EEPROM memory is available for storing sensor trimming and calibration coefficients on chip. The device is operated using standard I2C and SPI serial bus interfaces.


MAS6503 24-bit Low Power Piezoresistive Sensor Signal Interface IC

The MAS6503 uses a ratiometric AD-converter principle employing a delta-sigma (DS) conversion technique, giving very good noise performance. Its current consumption is extremely low (18.3 μA, one pressure conversion in a second at maximum resolution and including sensor bridge current) and it can operate at low supply voltage from 1.8 V to 3.6 V which makes it an ideal solution for interfacing a piezo-resistive sensor in power consumption critical portable applications. The effective number of bits (ENOB) of the ADC is 17.4 bits. The over sampling ratio (OSR) of the DS-converter has five values to choose from for further optimization between conversion accuracy, speed and current consumption. MAS6503 also features supply voltage monitoring mode which is especially useful in battery operated systems. The external sensor bridge can be used to sense not only pressure but also temperature, using the built-in sensor sampling switches. The MAS6503 communicates via a standard 2-wire I2C serial bus interface.


MAS6512 Capacitive Sensor Signal Interface IC

MAS6512 is a capacitive sensor signal conditioner IC, capable to interface both single and differential capacitance sensors. It uses a 16-bit Capacitance-to-Digital Converter, which employs a delta-sigma (ΔΣ) conversion technique. The output can be proportional either to capacitance difference or to capacitance ratio. The IC is designed especially to meet the requirement for low power consumption, thus making it an ideal choice for battery powered systems.

In addition to capacitance measurement the device has an internal temperature sensor for temperature measurement and temperature compensation purposes. The 256-bit EEPROM memory stores trimming and calibration coefficients on chip.


MAS6510 Capacitive Sensor Signal Conditioner IC

MAS6510 is a capacitive sensor signal conditioner IC, capable to interface both single and differential capacitance sensors. It uses a 24-bit Capacitance-to-Digital Converter, which employs a delta-sigma (ΔΣ) conversion technique. The output can be proportional either to capacitance difference or to capacitance ratio. The IC is designed especially to meet the requirement for low power consumption, thus making it an ideal choice for battery powered systems.

In addition to capacitance measurement the device has an internal temperature sensor for temperature measurement and temperature compensation purposes. The 256-bit EEPROM memory stores trimming and calibration coefficients on chip.


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