TDC-GP22 5K T&R

Sensor And Detector Interfaces Overview

The TDC-GP22 is a dual-channel Time-to-Digital Converter (TDC) designed for ultrasonic flow measurement applications. It features an integrated analog frontend with chopper-stabilized comparators and first-wave detection capabilities. The device supports Measurement Mode 1 with two channels at 90 ps resolution or Measurement Mode 2 with single-channel resolutions of 45 ps or 22 ps. Operating voltages range from 2.5 V to 3.6 V, with an ambient temperature range of -40°C to +125°C. It utilizes a 4-wire SPI interface and is housed in a QFN-32 package.

Sensor And Detector Interfaces Feature Summary

• Integrated analog frontend with programmable offset comparators and first-wave detection for signal monitoring.
• Dual-channel time-to-digital converter supporting high-resolution measurements up to 22 ps.
• Built-in temperature measurement unit compatible with PT500/PT1000 sensors.
• Programmable fire pulse generator for ultrasonic transducer excitation.

Sensor And Detector Interfaces Applications

• Ultrasonic heat meters
• Ultrasonic water meters
• Gas flow meters

Sensor And Detector Interfaces Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to ensure correct packaging configuration. Confirm that the component matches the required pinout and electrical specifications for the target application design.

Sensor And Detector Interfaces Selection Notes

Select this component for designs requiring high-precision time-of-flight measurements in compact form factors. Ensure power supply decoupling meets the low-noise requirements specified for the analog frontend to maintain measurement accuracy.

Sensor And Detector Interfaces Part Context

This part is a successor to the TDC-GP21, offering enhanced functionality including first-wave detection. It maintains pin compatibility while providing improved performance for dynamic flow metering applications.

Sensor And Detector Interfaces Replacement Considerations

The TDC-GP22 is functionally and pin-compatible with the TDC-GP21. Verify that any substitute components support the same voltage ranges and interface protocols.

Sensor And Detector Interfaces FAQ

What is the maximum resolution of the TDC-GP22?

In Measurement Mode 2 with Quad Resolution enabled, the typical resolution is 22 ps.

Does the TDC-GP22 include a temperature sensor interface?

Yes, it includes a dedicated temperature measurement unit capable of interfacing with PT500 or PT1000 sensors.

What is the purpose of the first-wave detection feature?

First-wave detection allows for automatic offset zeroing after the initial signal arrival, enabling signal strength monitoring and bubble detection.