MAS6502

DA6502.008 29 November 2012 MAS6502 Piezoresistive Sensor Signal Interface IC Optimized for Piezoresistive Pressure Sensors Very Low Power Consumption Ratiometric 16 Bit ∆Σ ADC Linearity 14 Bits Internal Clock Oscillator Serial Data Interface (I2C® Bus) 256 Bit EEPROM Memory DESCRIPTION MAS6502 is a 16 bit Analog-to-Digital Converter (ADC), which employs a delta-sigma (∆Σ) conversion technique. With the linear input signal range of 260 mVPP the linearity is 14 bits. MAS6502 is designed especially to meet the requirement for low power consumption, thus making it an ideal choice for battery powered systems. The MAS6502 is equipped with a standby function, i.e. the ADC is in power down between each conversion. By utilizing this and overall low power consumption, current consumption values of 2.5 µA (one pressure conversion in a second with full 14-bit accuracy) or less can be achieved. MAS6502 has an on-chip second order decimator filter to process the output of the second order ∆Σ -modulator. The ADC also has four selectable input signal ranges with one optional offset level. An internal trimmed clock oscillator provides a system clock signal (DCLK) eliminating the need for an external clock signal. A bi-directional I2C® bus compatible 2-wire serial bus is used for configuring conversion parameters, starting conversion and reading out the A/D conversion result. MAS6502 has one input channel suitable for a piezoresistive pressure sensor. In addition to pressure...