Home / Products / Flow Sensing / AS6040 Ultrasonic Flow Converter

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
  • 50 kHz to 1 MHz at 6 V to 17 V drive voltage, generated from battery supply
  • Integrated PGA, gain 2 to 200
  • 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

Benefits

  • Single-chip solution provides ready flow information
  • System design compatible with mechanical meters
  • High flexibility in choice for external µP handling communication and further data management
  • Operation from Battery
  • Precision down to low flow rates
  • Leakage detection
  • Handles weak signals for small transducers and multiple reflections
  • Compact design
  • Low BOM

Product parameters

Analog Frontend
Yes, with PGA and HV charge pump
First Wave Detection
Yes, Split burst
Amplitude Measurement
Yes
Number of Hits
31
Resolution TDC [ps]
22
Operating Supply Range
3.0 to 3.6
Interface
SPI, Pulse, 2-wire master
CPU
32-bit
Firmware
-
Memory
4k NVRAM, 4k ROM
GPIO
5
Ambient Temperature Range [°C]
-40 to +85
Package
QFN48

Applications

  • Residential gas meters
  • Industrial gas meters
  • Clamp-on water meters
  • Volume counters

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