Home / Products / Flow Sensing / TDC-GP21 Ultrasonic Flow Converter

Features

  • 2-channel TDC with 22ps resolution
  • Analog frontend for ultrasonic flow meters
  • Chopper-stabilized low-offset comparator for zero crossing detection
  • Precise windowing for hit selection
  • Temperature measuring unit for PT1000 sensors
  • QFN32 package

 

Benefits

  • High precision
  • Low power
  • Few additional external component needed

 

Product parameters

Analog Frontend
Yes
First Wave Detection
-
Amplitude Measurement
-
Number of Hits
3
Resolution [ps]
22
Operating Supply Range
2.5 to 3.6
Interface
SPI
CPU
-
Firmware
-
Memory
-
GPIO
-
Ambient Temperature Range [°C]
-40 to +125
Package
QFN32

Applications

  • Ultrasonic heat meters
  • Ultrasonic gas meters
  • Ultrasonic flow indicators
  • Laser rangefinders
  • Magnetostrictive sensors

 

Tools

Product name
Evaluation Kit for TDC-GP21
Description

The GP21-EVA-KIT evaluation system is designed as a platform for a quick and easy start-up and evaluation of the TDC-GP21 Time-to-Digital Converter. The EVA-Kit offers user-friendly configuration and extensive testing of the TDC-GP21. The GP21-EVA-KIT is a full featured evaluation system for the TDC-GP21 Time to digital converter. It serves as - System for evaluating ultrasonic time-of-flight measurement applications - Evaluation Kit for TDC-GP21 time interval measurements

Product name
Demo Kit for TDC-GP22
Description

The GP22-DEMO-KIT evaluation system is designed as a platform for a quick and easy start-up and evaluation of the TDC-GP22 Time-to-Digital Converter. The DEMO-Kit offers user-friendly configuration and extensive testing of the TDC-GP22. The GP22-DEMO-KIT is a specialized evaluation system for the TDC-GP22 Time to digital converter. It serves as - System for evaluating ultrasonic time-of-flight measurement applications. All kits come with the PICOPROG interface box to connect to USB ports.

Product name
Evaluation Kit for TDC-GP22
Description

The GP22-EVA-KIT evaluation system is designed as a platform for a quick and easy start-up and evaluation of the TDC-GP22 Time-to-Digital Converter. The EVA-Kit offers user-friendly configuration and extensive testing of the TDC-GP22. The GP22-EVA-KIT is a full featured evaluation system for the TDC-GP22 Time to digital converter. It serves as system for evaluating ultrasonic time-of-flight measurement applications and evaluation Kit for TDC-GP22 time interval measurements. All kits come with the PICOPROG interface box to connect to USB ports.

Related Products

Product name
TDC-GP22 Ultrasonic Flow Converter
Description

TDC-GP22 is a 2-channel TDC with additional analog elements like extended fire-pulse generator, zero-cross detection and analog switches for simplifying the use in ultrasonic flow meter applications. The addition first-hit detection makes TDC-GP22 suitable for high dynamic applications as ultrasonic water meters. An optimized power managements of the various units brings down the operating current to a few µA at 2Hz measuring rate.

Product name
TDC-GP30 Ultrasonic Flow Converter
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.

Product name
TDC-GP30-F01 Ultrasonic Flow Converter
Description

TDC-GP30-F01 is a complete ultrasonic flow metering solution, including the flow calculation. 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-F01 firmware does the linearization and temperature compensation based on spool piece specific calibration data and completes the system-on-chip approach.