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TDC-GP30 Ultrasonic Flow Converter

System on chip solution for ultrasonic flow metering


  • High performance and 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
  • High update rates with very low power consumption (e.g. 6 µA@8Hz)


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

Product parameters

Analog Frontend Yes
First Wave Detection Yes
Amplitude Measurement Yes
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 to +125
Package QFN32, QFN40

General Description

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.

This product suits for the following applications:

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


Title Category Headline Buy
TDC-GP30-F01 DemoKit Application Board Development Kit for TDC-GP30

Technical Documents

Name Type Description Version Language
TDC-GP30_AN000509_1-00.pdf Application Note TDC-GP30 Application note single transducer 1-00 English
TDC-GP30_AN000510_1-00.pdf Application Note TDC-GP30 Application note gas meter 1-00 English
TDC-GP30_TDC-GP30-F01_AN000511_1-00.pdf Application Note TDC-GP30 UART Communication 1-00 English
TDC-GP30_AN000540_1-00.pdf Application Note Simple FHL Regulation Method 1-00 English Application Note Simple FHL Regulation Method and ASM Source Code 1-00 English
TDC-GP30_AN000565_1-00.pdf Application Note Vol. 3 User Manual 1-00 English
TDC-GP22_GP30_AN000283_1-00.pdf Application Note Water / heat metering 1-00 English
TDC-GP30_AN000586_1-00.pdf Application Note Toggling GPIO pin of GP30 using open firmware section 1-00 English Application Note Toggling GPIO pin of GP30 using open firmware section and ASM Source Code 1-00 English
TDC-GP30_BD000307_1-00.png Block Diagram TDC-GP30 Block Diagram 1-00 English
TDC-GP30_DS000391_2-00.pdf Datasheet Volume 1 (General Description); 0.2 2-00 English
TDC-GP30_DS000392_1-00.pdf Datasheet Volume 2 (CPU, Memory, Firmware); 0.0 1-00 English
TDC-GP30_FS000213_1-00.pdf Factsheet Building Static Water Meters of High Quality 1-00 English
PCAPx_TDC-GPx_PS09_PD000176_1-00.pdf Other Product Document Change Notification_MOQ Amendment_PCAPx_TDC-GPx_PS09FN (issued 2017-Mar) 1-00 English
TDC-GP30_QG000115_1-00.pdf Quick Start Guide Development Kit 1-00 English
TDC-GP30_UG000292_2-00.pdf User Guide TDC-GP30-DEV-KIT Reference Board Manual 2-00 English
TDC-GP30_TDC-GP30-F01_UG000360_1-00.pdf User Guide TDC-GP30-EVA-KIT Standard Board Manual 1-00 English

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