ScioSense AS6031

The AS6031 enables next generation ultrasonic flow converters for water and heat meters. Time of flight information and flow calculation (-F01) is extracted by a front-end that is driving the transducers and processing the receive signal, a programmable gain amplifier allows handling weaker receive amplitudes while a phase-modulation provides even more robustness to the first hit level detection of the system.

The integrated low-power CPU combines flow calculation with a precise measurement front-end, providing outstanding low-flow detection capability down to leakage levels yet still enabling battery operated devices with years of lifetime.

Key features

• Precision time-to-digital converter and low-noise front-end
• Ultra-low power consumption
• Integrated PGA programmable gain amplifier
• Low-flow detection capability down to leakage levels

Additional features

• High performance and ultra-low power 32-Bit CPU
• NVRAM (non-volatile RAM) for user firmware parameter & data and program code
• ROM for special flow library code
• Advanced high-precision analog front-end for transducer frequencies of 50 kHz to 4 MHz at 2.5 V to 3.6 V drive voltage
• First hit level and phase detection
• Amplitude measurement
• Up to 31 zero crossing measurements
• SPI serial interface
• General Purpose I/O Unit incl. pulse interface
• Supply voltage 2.5 to 3.6 V
• Operating temperature -40°C to 85°C
• QFN48 package (7mm x 7mm)

Applications

• Water meters
• Heat meters
• Gas meters
• Volume counters
• Flow meters