Bullet Sensors & Transducers e-Digest, Vol. 133, Issue 10, October 2011: Product News

    (ISSN 1726-5479)



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Micro Analog Systems Releases Low Power Piezo Resistive
Sensor Signal Interface IC


Helsinki, Finland 06 October 2011 - Micro Analog Systems Oy has announced MAS6502, a 16-bit Piezo Resistive Sensor Signal Interface IC primarily intended for MEMS based pressure sensor modules.


The device uses a ratiometric AD-converter principle employing a delta-sigma (ΔΣ) conversion technique, giving very good noise performance. Its current consumption is extremely low (2.3 μA ) and it can operate at low supply voltage from 2.0 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 14-bits. The over sampling ratio (OSR) of the ΔΣ-converter has four values to choose from for further optimization between conversion accuracy, speed and current consumption. The external sensor bridge can be used to sense not only pressure but also temperature, using the built-in sensor sampling switches. The MAS6502 communicates via a standard 2-wire I2C serial bus interface.



MAS6502 Piezo Resistive Sensor Signal Interface



  • Low Standby Current Consumption 0.1 μA Typ

  • Very Low Supply Current: 0.35 μA2.3 μA

  • Supply Voltage: 2.0 V3.6 V

  • Ratiometric ΔΣ Conversion

  • Selectable Input Signal Ranges (VDD=2.35V): 325 mVPP, 220 mVPP, 150 mVPP, 100 mVP

  • Selectable Optional Offset (VDD=2.35V): 33 mV

  • Selectable Sensor Resistance Values 5 kΩ, 4.5 kΩ, 4 kΩ, 3.4 kΩ

  • Over Sampling Ratio: 512, 256, 128, 64

  • Conversion Times 0.8 ms10.6 ms Typ

  • 2-Wire Serial Data Interface (I2C Bus)

  • 256 Bit EEPROM Memory

  • Good Noise Performance thanks to the ΔΣ Architecture

MAS6502 is available in a QFN-16 4x4x0.75 package as well as tested wafers or dies in waffle pack. For further information and samples please contact Micro Analog Systems Oy.



About Micro Analog Systems


Founded in 1984, Micro Analog Systems Oy is a privately owned fabless semiconductor house located in Helsinki, Finland. MAS supplies Application Specific Standard Parts and ASICs for worldwide customer base. MAS current product portfolio consists of time signal receiver ICs, crystal oscillator ICs and AD converters for sensor applications as well as of other high performance analog ICs.





Jan Gripsborn

VP Sales & Marketing

Micro Analog Systems Oy

Kutomotie 16, FI-00380, Helsinki Finland

Tel.:+46 708 778 110


Web: http://www.mas-oy.com


MAS6502 Piezo Resistive Sensor Signal Interface




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