cronologic time tagger time to digital converter zoomed image


Low cost, mid resolution time-to-digital converter

If a resolution of 500ps is sufficient, the TimeTagger4G can replace our high end TDCs at a lower cost.
Low cost

Low cost

The TimeTagger4 is available at the lowest cost, while still providing picosecond resolution.


The threshold discriminators can use positive or negative thresholds with configurable voltage. This allows you to use TimeTaggers with a wide range of detectors or constant fraction discriminators (CFD).
TiGer timing generator

TiGer timing generator

All inputs can also be used to output periodic pulse patterns to control your setup. The exact timing of these is measured by the TDC.

Cronologic presents an exciting series of low-cost, mid-resolution time-to-digital converters. These time interval analyzer boards feature 500ps to 1ns single-shot resolution at a high readout bandwidth.

Time Taggers are ideally suitable in applications that do not require the highest single-shot timing resolution, but high data acquisition rates and the lowest multiple hit deadtime. These include certain types of mass spectroscopy (TOF-MS), time-correlated single photon counting (TCSPC) and frequency counting applications.

TimeTaggers are high-bandwidth, low-cost common start time-to-digital converters (TDCs). The timestamps of leading or trailing edges of digital pulses are recorded from the TimeTagger4-1G with a single shot time resolution (bin size) of 1000 ps. The TimeTagger4-2G, on the other hand, records these with a single-shot time resolution of 500 ps.

For both time interval meters, cronologic will support you with drivers for Windows and Linux.

Please note: "TimeTagger" is a registered trademark of cronlogic.



(fluorescence-lifetime imaging microscopy)
The decay time of an excited fluorophore is typically in the range of a few nanoseconds. In fluorescence lifetime imaging the exponential decay of a sample is determined requiring a timing resolution in the picosecond regime.


also known as: LIDAR, LiDAR, and LADAR, "light detection and ranging", "laser imaging, detection, and ranging", "3-D laser scanning", "LIDAR mapping", "airborne laser scanning", ALS
LIDAR Systems emit ultraviolet, visible, or near-infrared light to image objects and measuring the time-of-flight (TOF) of reflected photons. Such systems are used for object detection and tracking in many different fields, ranging from archaeology to agriculture, autonomous vehicles and robots etc.


optical time-domain reflectometry, optical time-domain reflectometer, remote fiber testing
In optical time-domain reflectometry the time of the reflections is determined from the reflection loss by measuring from the same end of the fiber how much light returns via the Rayleigh backscatter or is being reflected from individual locations along the fiber.

TOF mass spectrometry

TOF- & MASS- spectroscopy detectors, TOFMS
In many TOFMS units cronologic TDCs are used to measure precisely the arrival of single ions. From the arrival time, the ion’s time-of-flight is deduced, from which the mass-to-charge ratio of the detected particle can be determined.

Time Domain Reflectometry

TDR, distance-to-fault, DTF
TDR (Time Domain Reflectometry) is an electronic measurement method that measures reflections along a conductor. It belongs to the category of Distance-to-Fault (DTF) measurements. TDR measurements provide meaningful information about the broadband behavior of transmission systems.

Time-Correlated Single Photon Counting

TCSPC, photon counting, time-correlated single photon counting, detection of individual photons, single-photon detectors (SPD), photosensors
Whether in astrophysics, materials science, quantum information science, quantum encryption, medical imaging, DNA sequencing or in fiber-optic communication: Single-photon detectors (SPD) provide a timing signal from which, for example, fluorescence lifetimes of excited matter can be deduced.

phase shift measurements

frequency and phase shift measurements, phase-noise-analyzers
In phase measurements the phase of an incident signal is compared to the phase of a device's response signal. With increasing frequency, such phase shift measurements become more challenging. cronologic TDCs provide many features which help to address this difficult task.

quantum research

Quantum research affects many areas of modern science: quantum cryptography, quantum information science, quantum encryption, quantum key distribution (QKD), quantum electro dynamics (QED), quantum computing etc.
Quantum phenomena such as superposition, uncertainty, and entanglement are studied in quantum research with the goal that they can be safely fabricated when needed and made useful in various disciplines.


- Data

Optimized for
low cost
1 start & 4 stop channels
5x LEMO 00
1 ns (1G) / 500 ps (2G)
2 ns (1G) / 1 ns (2G)
1000x per start event
48 MHits/s
8 ms, 2.147 s extended
yes / no
PCIe x1 @ 200MB/s
50 ppb on board
TDC channels @ bin size
Additional inputs
Bin size
Double pulse resolution
Dead time between groups
Readout rate
Common start/stop
Number of boards that can be synced
Readout interface
Time base
Linux support available
Currently there are no Downloads available for this product.

TimeTagger4-2G & TimeTagger4-1G Product Brief
TimeTagger4-2G & TimeTagger4-1G User Guide
TimeTagger4 driver_v1.2.0.exe for Windows 7/8
TimeTagger4 driver_v1.4.4.exe for Windows 10 & 11
get support for your Linux distribution