Asset Publisher

TDC-GPX2 Time-to-Digital Converter

High-end multipurpose 4-channel converter


  • Simple data processing thanks to calibrated results and clock index
  • Easy pulse width measurements
  • High efficiency thanks to high sample rate
  • 4 differential stop channel inputs with serial differential output each (LVDS)
  • 16-stage FIFO per channel
  • Optional configuration as CMOS inputs


  • Suited for high-end applications
  • Allows for highest measurement rates and data throughput
  • Meets best in class resolution requirements
  • "Free running TDC" architecture
  • Enables compact designs (small form factor)

Product parameters

Channels 4
Inputs LVDS (CMOS)
Resolution [ps] 10
Pulse-Pair Resolution [ns] 20, channels combined < 5
Measurement Rate [MSPS] 70 (peak)
Multi-Hit Capability Unlimited
Operating Supply Range [V] 3.0 to 3.6
Interface Serial LVDS per channel, SPI
Ambient Temperature Range [°C] -40°C to +125°C
Package QFN64

General Description

The TDC-GPX2 is the most powerful member in our TDC family. Highest measurement performance and highest data throughput is achieved with LVDS stop inputs and LVDS serial output for each channel. Current saving operation is also possible with CMOS inputs and SPI readout. High configuration flexibility covers many applications. Applications range from gaming, portable handheld laser range equipment to ambitious time-of-flight of highest performance, such as in medical imaging applications. GPX2 operates without any locked loop technologies. All stop event measurement times are calibrated inside the GPX2 proportional to the applied reference clock. Combinations of best single-shot accuracy of 10ps with lowest pulse-to-pulse spacing 5ns and maximum data throughput rate 70 MBPS per stop input are possible.

This product suits for the following applications:

  • Laser scanners and ranging
  • Gaming
  • Virtual reality (VR)
  • Augmented reality (AR)
  • Medical imaging (PET)
  • Robotics (Robot cleaning, lawn mowers, drones, UAVs)
  • Time-of-Flight spectroscopy
  • Time-of-Flight measurement
  • Biomedical technology
  • Automated test equipment (ATE)


Title Category Headline Buy
TDC-GPX2EvalKit Application Board Evaluation Kit for TDC-GPX2

Technical Documents

Type Description Language
Datasheet Document version 1-03 English

Environmental Documents

Type Description Language
Material Declaration Form MDF_502050006_TDC-GPX2 English
RoHS Certificate RoHS Certificate TDC-GPX2 English

Other Information

Type Description Language
Block Diagram TDC-GPX2 Block Diagram English
Factsheet Clearer Images with Lower Dose English

Asset Publisher

Sciosense JV Teaser Environmental Sensors long

Ownership of this product has moved to Sciosense

Please be informed that this product is now owned by Sciosense B.V., a joint venture of ams AG and Wise Road Capital, effective January 13th, 2020.

ScioSense Environmental Sensors