Timepix3 is a general-purpose integrated circuit suitable for readout of both semiconductor detectors and gas-filled detectors. Compared to Timepix1 the circuit has more functionality, better time resolution and more advanced architecture for continuous sparse data readout with zero-suppression. Timepix3 can be used in a wide range of applications varying from X-rays imaging to particle track reconstruction. 

Depending on the application requirements user can choose one out of three data acquisition modes available in the Timepix3. In the data driven mode both arrival time information and charge deposit information are sent off chip for each hit together with the coordinates of the active pixel. The chosen architecture allows for continuous and trigger-free readout of sparsely distributed data with the rate up to 40Mhits/s/cm2. For imaging applications and for calibrations the possibility exists of operating in frame-based (non-continuous) data readout mode.

Advantages & Applications


  • Pixel size 55μm x 55μm
  • 256 x 256 pixels
  • Timepix3 is suitable for readout of both semiconductor detectors and gas-filled detectors
  • Single thresholds per pixel each with 4 bits of local adjustment
  • Two main measurement modes: (1) simultaneous 10 bit ToT and 18 bit TOA and (2) 10 bit event counting and 14 bit integral TOT
  • TOT monotonic for large positive charges
  • Fast TOA for time stamping with a precision of 1.56 ns
  • Data driven readout: dead time free, for a maximum hit rate of 40 Mhits/s/cm2
  • Shutdown/wake-up features for power pulsing tests on a full system
  • 3-side buttable (with a single 1.2mm dead edge)
  • TSV ready


  • X-rays imaging
  • Particle track reconstruction.
  • Timepix3 is suitable for readout of both semiconductor detectors and gas-filled detectors.


CMOS technology 0.13μm
Pixel size 55μm x 55μm
Pixel matrix 256 x 256
Design CERN, NIKHEF, Bonn University


Analog front end (pixel cell)
Signal polarity Positive and negative
Leakage current -10nA to +20nA
TOA jitter and mismatch Compatible with 1.56ns resolution (gas detector applications)
Time to peak 25ns
Noise 62 e- rms
Threshold variation (after tuning) 30 e- rms
Minimum operating treshold 500 e-


Digital part (pixel cell + periphery)
TOA precision 1.56ns
Number of bits per hit 48
Data sent per hit x, y TOT (10 bits) TOA (18 bits)
Readout uses up to 8 parallel LVDS lines (200 MHZ clock)  
Total analog power consumption (nominal conditions) 440mW
Total digital power consumption (@100MHz) 450mW
The Medipix Collaborations
Ready for licensing