The ASIC interfaces with the newest generation of MOX (Metal OXide) gas sensors to measure VOCs (Volatile Organic Compounds). It contains analog heater drivers, a high-precision readout chain and an embedded MSP430 microcontroller core. The ASIC is designed towards low area and ultra-low-power consumption targeted to the mobile phone market.

FEATURES

• Fast analog drivers to heat the MOX material to up to 400°C
• High-precision resistance measurement to detect gas concentrations
• Time-multiplexing to minimise silicon area
• 12-bit ADC
• MSP430 core for increased system flexibility
  • 32 kByte Flash, 4 kByte SRAM, 512 Byte Rom
  • User-controllable timers and GPIO
  • I2C interface, 400kHz
  • Log2/Exp2 for fast calculations
  • Deep Sleep mode counter for ultra-low-power consumption
• Temperature ranges: -40°C – 100°C
• 0.18um CMOS (with embedded Flash)