AMS – TDC-GPX2 Time-to-Digital Converter

  • Suited for high-end applications
  • Highest measurement rates and data throughput


High end multipurpose 4-channel converter

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 10 ps with lowest pulse-to-pulse spacing 5 ns and maximum data throughput rate 70 MBPS per stop input are possible.


Key Features

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

Key Benefits

  • Suited for high-end applicaitions
  • 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 Facts


Inputs LVDS (CMOS)
Resolution [ps] 10
Pulse-pair resolution [ns] 20, channels combined < 5
Measurement rate 70 MSPS peak
Multihit 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



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