TDC-GP21 1K

Sensor And Detector Interfaces Overview

The TDC-GP21 is a Time-to-Digital Converter (TDC) chip designed by ScioSense for ultrasonic flow measurement. It features dual-channel time measurement with a resolution of 22 picoseconds, enabling precise detection of transit time differences between upstream and downstream ultrasonic signals. The device integrates an analog front-end including a high-voltage pulse generator, low-noise amplifier, and bandpass filter centered at 40 kHz. It supports internal temperature measurement via a PT1000 interface with ±0.1°C accuracy to correct sound velocity variations. The chip utilizes a ring oscillator and coarse counter for time interval calculation, supporting a measurement range up to 20 bits.

Sensor And Detector Interfaces Feature Summary

• Integrated analog front-end with high-voltage pulse generation and low-noise amplification for direct transducer driving and signal conditioning
• Dual-channel hardware architecture for simultaneous upstream and downstream time stamping to minimize measurement error
• Built-in temperature sensing interface for real-time sound velocity correction without external sensors
• Low-power ceramic oscillator support with short wake-up times to reduce system current consumption

Sensor And Detector Interfaces Applications

• Ultrasonic heat meters for district heating systems
• Industrial water flow monitoring in environmental protection sectors
• Energy metering for residential and commercial utility applications

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix '1K' against official ScioSense documentation to confirm packaging or tape-and-reel specifications. Ensure compatibility with required voltage levels and clock frequencies before integration. Cross-reference pin assignments with the latest datasheet to avoid design errors due to potential revisions.

Sensor And Detector Interfaces Selection Notes

Select this component when high-precision time-of-flight measurement is required for liquid flow applications. It is suitable for designs needing integrated signal conditioning to reduce external component count. Consider its low-power characteristics for battery-operated metering devices requiring long operational lifespans.

Sensor And Detector Interfaces Part Context

The TDC-GP21 succeeds the TDC-GP2, offering enhanced integration for ultrasonic heat metering. It replaces discrete solutions by combining TDC, AFE, and temperature measurement functions. This consolidation simplifies PCB layout and improves system reliability by reducing interconnect complexity and potential noise sources in sensitive analog paths.

Sensor And Detector Interfaces Replacement Considerations

The TDC-GP2 is the predecessor model. Verify if legacy designs can migrate directly, noting that the GP21 offers improved integration and lower power consumption. No other direct substitutes are confirmed in public documentation.