Features
- High performance + ultra-low power 32-Bit CPU
- 120 * 32 bit NVRAM (non-volatile RAM) for user firmware parameter & data
- 3968 * 8 bit NVRAM (non-volatile RAM) for user firmware program code
- 4k * 8 bit ROM for system task code and 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
- Integrated PGA, gain 2 to 30 @ 1 MHz
- First hit level and phase detection
- Amplitude measurement
- Up to 31 zero crossing measurements
- Precision time-to-digital converter and low-noise front-end with < 50 ps single shot with good 1MHz transducers on a DN20
- Ultra-low power consumption
- SPI serial interface
- General Purpose I/O Unit incl. pulse interface and 2-wire master interface (I2C like)
- Supply voltage 2.5 to 3.6 V
- 3.0 to 3.6 V NVRAM store only
- Operating temperature -40 to 85°C
- QFN48 package (7 x 7mm²)
Benefits
- Single-chip solution provided ready flow information
- System design compatible with mechanical meters
- High flexibility in choice for external μP handling communication and further data management
- Precision down to low flow rates
- Leakage detection
- Handles weak signals for small transducers and multiple reflections
- Compact design
- Low BOM
Product properties
Applications
- Water meters for utilities
- Industrial water meters
- Heat meters
- Gas meters
- Volume counters
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Description
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Documents
Technical Documents

Title
AS6031 Datasheet
Description
AS6031 Datasheet
Language
English

Title
AS6031 User Guide
Description
AS6031 User Guide
Language
English

Title
UFC ST Nucleo Shields Expansion Boards User Guide
Description
User Guide
Language
English

Title
AS6031/40 How to write custom firmware
Description
Application Note
Language
English

Title
AS6031 Concentration Measurement with single transducer
Description
Application Note
Language
English
Other documents

Title
Factsheet
Description
Ultrasonic flow converter for the next generations of ultrasonic water and heat meters
Language
English