Ultrasonic Flow Converter with Integrated Analog Frontend
TDC-GP22 is an integrated ultrasonic flow converter front end.
It is a 100% pin and functionally compatible upgrade to TDC-GP21. It has additional functionality compared to the TDC-GP21 - the first hit detection and the patented signal strength monitoring by pulse width measurement. This makes it the first complete and easy to use front-end chip for ultrasonic water meters and heat meters.
The TDC-GP22 has analog elements like the fire-pulse generator, zero-crossing detection and analog switches that simplify the design of ultrasonic flow meters. The first-hit detection makes TDC-GP22 suitable for high dynamic range ultrasonic water meters. The optimized power management of the various subsystems allows the operating current to be only a few µA at 2 Hz measurement rate.
The TDC-GP22 is a good front-end solution for designing compact, low-cost ultrasonic flow meters and heat meters.
For even higher integration and lower current consumption, please see the TDC-GP30.
|First Wave Detection||Yes|
|Number of Hits||3|
|Operating Supply Range||2.5 to 3.6|
|Ambient Temperature Range [°C]||-40°C to +125°C|