ams AG - global leader in the design and manufacture of high performance analog ICs (integrated circuits)

TDC-GP30 Ultrasonic flow converter

System-on-Chip solution for ultrasonic flow metering


TDC-GP30 is the next step in ultrasonic flow metering. It drastically simplifies the design of ultrasonic heat and water meters and is the necessary step for compact energy-saving ultrasonic water meters. The ultra-low-current capabilities allow the use of standard 2/3 AA or AA lithium thionyl chloride batteries at 6-8 Hz measuring frequency even in the water meter version. The TDC-GP30 is a system-on-chip approach that allows you to perform all measurement tasks in one IC.

Key Features

  • High performance + ultra-low power 32-Bit CPU with 4k NVRAM and 4k ROM
  • Up to 31 multi-hits for flow measurement yield the highest accuracy
  • Advanced high-precision analog part
  • Transducers can be connected directly to GP30, no external components required
  • Amplitude measurements of receiving signal for secure bubble, aging and empty spool piece detection
  • Up to 31 multi-hits for flow measurement yield the highest accuracy
  • High update rates with very low power consumption of for example 6 µA at 8 Hz

Key Benefits

  • Lowest power solution for ultrasonic water meters
  • On-chip firmware allows fastest time-to-market
  • Best measurement performance for leakage detection

Product Facts

Analog Frontend
First wave detection
Amplitude measurement
Number of hits 31
Resolution [ps] 11
Operating supply range 2.5 to 3.6
Interface SPI, UART, Pulse
CPU 32-bit
Memory 4k NVRAM, 4k ROM
Ambient temperature range [°C] -40°C to +125°C
Package QFN32, QFN40

Additional Information

  • Ultrasonic water meters
  • Ultrasonic heat meters
  • Ultrasonic gas meters
  • Industrial flow indicators