TIME TO DIGITAL CONVERTERS
TDC-GPX Multifunctional High-end Time-to-Digital Converter.
The TDC-GPX multifunctional architecture makes it a very powerful time-to-digital Converter (TDC). The TDC-GPX is designed for applications where high single-shot resolution, best pulse-pair resolution, and high measurement rates are required. This is a huge step forward in time measurement based on TDCs.

Time to Digital Converters
The TDC-GPX features 4 different operation modes, 8-channels with 32-fold multi-hit capability and a resolution down to 10 ps. These features make the TDC-GPX perfectly suited for industrial and scientific applications.
NTDC-GPX Applications
- Laser Scanners
- Time-of-Flight Spectroscopy
- Time-of-Flight Measurement
- Biomedical Technology
- Automated Test Equipment
Modes Overview
I-Mode
- 8 channels with 81 ps BIN
- LVTTL inputs
- 5.5 ns pulse-pair resolution with 32-fold multi-hit capability = 200 MHz peak rate
- Trigger to rising or falling edge
- Endless measurement range by internal retrigger of START
- 10 MHz continuous rate per channel
- 40 MHz continuous rate per chip
R-Mode
- 2 channels with 27 ps BIN
- Differential LVPECL inputs
- Measurement range 0 ns up to > 10 µs
- 5.5 ns pulse-pair resolution with 32-fold multi-hit capability 200 MHz peak rate
- Trigger to rising or falling edge
- Optional Quiet Mode (no ALU operation and Data-output during measurements)
- 40 MHz continuous rate per channel
- 40 MHz continous rate per chip
M-Mode
- 2 channels with 10 ps BIN
- 70 ps peak-peak
- Differential LVPECL inputs
- Measurement range 0 ns to > 10 µs
- Single hit per Start
- Minimum pulsewidth 1.5 ns
- Trigger to rising or falling edge
- Quiet Mode (no ALU operation and Data-output during measurements)
- 500 kHz continuous rate per channel
G-Mode
- 2 channels with 41 ps BIN
- Differential LVPECL inputs
- Measurement range 0 ns to > 10 µs
- 5.5 ns pulse-pair resolution between edges of equal slope with 32-fold multi-hit = 200 MHz peak rate
- Pulsewidth measurement down to 1.5 ns
- Trigger to rising and falling edge
- Optional Quiet Mode (no ALU operation and Data-output during measurements)
- 20 MHz continuous rate per channel
- 40 MHz continuous rate per chip
TDC-GPX Evaluation System
ATMD Evaluation System for ams (previously acam) TDCs

GENERAL FEATURES
- PC supported system; communication via PCI interface
- External ATMD-MB motherboard with AM-GPX (8 channels 81 ps resolution, 2 channels with 40 ps, 27 ps, or 10 ps resolution)
- No additional power supply for the external motherboard. The power supply is provided by the interconnecting cable
- Comfortable Windows software
- User specific software can be written in every programming language
- 2 operating modes (for details see the datasheets)
- a: AT-Bus polling mode up to approx. 200k measurings per second (without graphical display)
- b: Burst mode, up to approx. 1 Mio. measurings per second (peak, without graphical display)
- On board measurement cache as FIFO. It can store up to 32 K measurements on average (1 K default)
- External board with metal housing
It’s modular and all-around open architectural system enables the ATMD to serve as an evaluation-kit as well as a complete and efficient measurement instrument.
Documentation & Downloads
Datasheet
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DescriptionDatasheet TDC-GP22 Eval System: |
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DescriptionDatasheet TDC-GP22: |
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DescriptionDatasheet TDC-GP21 Eval System: |
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DescriptionDatasheet TDC-GP21: |
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DescriptionDatasheet TDC-GPX: |
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DescriptionDatasheet TDC-GPX2 Eval System: |
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DescriptionDatasheet TDC-GPX: |
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Application Notes
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DescriptionApplication Note 027: |
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DescriptionApplication Note 024: |
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Software
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DescriptionSoftware TDC-GPX2: Evaluation software package for GPX2 (incl. doc, cfg, drv) |
VersionV1.0.5 |
Size206MB |
Downloadprecision-measurement-tdc-gpx2-evalsw-v1-0-5-0.zip |
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DescriptionSoftware TDC-GP22: STM32 µC Sample code of Application Note 034 |
Version |
Size42kB |
DownloadGP22_main_AN034.c |
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DescriptionSoftware TDC-GP22: Software package for GP22-EVA-KIT |
VersionV1.9 |
Size111MB |
DownloadCD-GP22-EVA-XP-WIN7.zip |
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DescriptionSoftware TDC-GP21: Software package for GP21-EVA-KIT |
VersionV3.9 |
Size104MB |
DownloadCD-GP21-EVA-XP-WIN7.zip |
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DescriptionSoftware TDC-GPX: Evaluation software for ATMD-GPX |
VersionV4.0 |
Size18MB |
DownloadATMD-GPX.zip |
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DescriptionSoftware TDC-GPX: Visual-C++ sample code for ATMD-GPX |
Version |
Size214kB |
DownloadATMD-GPX-C-samples.zip |
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DescriptionSoftware ATMD-PCI: Driver files for ATMD-PCI interface card |
Version |
Size2kB |
DownloadAcamAtmdPci.zip |
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DescriptionSoftware PICOPROG V3.0 (V2.0): Driver Installer Stand-Alone |
VersionR11 |
Size5MB |
DownloadPicoProg_v2_Driver_Installer_Stand-Alone.zip |
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DescriptionSoftware National Instruments: NI VISA runtime engine for Windows XP |
VersionV3.2 |
Size14MB |
Downloadni-visa.zip |
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DescriptionSoftware National Instruments: NI VISA runtime engine for Windows XP |
VersionV3.2 |
Size14MB |
Downloadni-visa.zip |
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DescriptionSoftware National Instruments: NI VISA runtime engine for Windows 7 |
VersionV4.62 |
Size53MB |
Downloadvisa462runtime.exe |
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DescriptionSoftware National Instruments: NI VISA runtime engine for Windows Vista |
VersionV4.1 |
Size41MB |
Downloadvisa410full.exe |
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DescriptionSoftware National Instruments: NI VISA runtime engine for Windows XP |
VersionV3.2 |
Size14MB |
Downloadvisa320runtime.exe |
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DescriptionSoftware National Instruments: NI VISA runtime engine for Windows 98 |
VersionV2.6 |
Size8MB |
Downloadvisa260runtime.exe |
PCN/PDN (Product Change / Discontinuation Notes)
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DescriptionPB-Free Package |
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Datasheet
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DescriptionDatasheet TDC-GP22 Eval System: |
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DescriptionDatasheet TDC-GP22: |
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DescriptionDatasheet TDC-GP21 Eval System: |
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DescriptionDatasheet TDC-GP21: |
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DescriptionDatasheet TDC-GPX: |
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Description |
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Description |
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DescriptionDatasheet TDC-GPX2 Eval System: |
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Description |
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DescriptionDatasheet TDC-GPX: |
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Application Notes
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DescriptionApplication Note 034: Laser Range Finder with the TDC-GP22 |
VersionV1.3 |
Size837KB |
DownloadAN034_en.pdf |
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DescriptionApplication Note 027: TDC-GP2 to TDC-GP21 Migration and Compatibility Guideline |
VersionV0.1 |
Size400kB |
DownloadAN027_en.pdf |
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DescriptionApplication Note 024: Metrological Investigations of TDC-GP2 Temperature Measurement Unit |
VersionV1.0 |
Size1.2MB |
DownloadAN024_en.pdf |
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DescriptionApplication Note 016: TDC-GPX Reduced Decoupling |
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Size73kB |
DownloadAN016_en.pdf |
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DescriptionApplication Note 013: TDC-GPX – PLL Regulation Circuit |
VersionV3.0 |
Size100kB |
DownloadAN013_en.pdf |
Software
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DescriptionSoftware TDC-GPX2: Evaluation software package for GPX2 (incl. doc, cfg, drv) |
VersionV1.0.5 |
Size206MB |
Downloadprecision-measurement-tdc-gpx2-evalsw-v1-0-5-0.zip |
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DescriptionSoftware TDC-GP22: STM32 µC Sample code of Application Note 034 |
Version |
Size42kB |
DownloadGP22_main_AN034.c |
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DescriptionSoftware TDC-GP22: Software package for GP22-EVA-KIT |
VersionV1.9 |
Size111MB |
DownloadCD-GP22-EVA-XP-WIN7.zip |
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DescriptionSoftware TDC-GP21: Software package for GP21-EVA-KIT |
VersionV3.9 |
Size104MB |
DownloadCD-GP21-EVA-XP-WIN7.zip |
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DescriptionSoftware TDC-GPX: Evaluation software for ATMD-GPX |
VersionV4.0 |
Size18MB |
DownloadATMD-GPX.zip |
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DescriptionSoftware TDC-GPX: Visual-C++ sample code for ATMD-GPX |
Version |
Size214kB |
DownloadATMD-GPX-C-samples.zip |
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DescriptionSoftware ATMD-PCI: Driver files for ATMD-PCI interface card |
Version |
Size2kB |
DownloadAcamAtmdPci.zip |
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DescriptionSoftware PICOPROG V3.0 (V2.0): Driver Installer Stand-Alone |
VersionR11 |
Size5MB |
DownloadPicoProg_v2_Driver_Installer_Stand-Alone.zip |
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DescriptionSoftware National Instruments: NI VISA runtime engine for Windows XP |
VersionV3.2 |
Size14MB |
Downloadni-visa.zip |
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DescriptionSoftware National Instruments: NI VISA runtime engine for Windows XP |
VersionV3.2 |
Size14MB |
Downloadni-visa.zip |
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DescriptionSoftware National Instruments: NI VISA runtime engine for Windows 7 |
VersionV4.62 |
Size53MB |
Downloadvisa462runtime.exe |
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DescriptionSoftware National Instruments: NI VISA runtime engine for Windows Vista |
VersionV4.1 |
Size41MB |
Downloadvisa410full.exe |
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DescriptionSoftware National Instruments: NI VISA runtime engine for Windows XP |
VersionV3.2 |
Size14MB |
Downloadvisa320runtime.exe |
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DescriptionSoftware National Instruments: NI VISA runtime engine for Windows 98 |
VersionV2.6 |
Size8MB |
Downloadvisa260runtime.exe |
PCN/PDN (Product Change / Discontinuation Notes)
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DescriptionPCN/PDN TDC-GP1:Pd-free package |
VersionV1. |
Size67kB |
DownloadPCN0104.pdf |
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DescriptionPCN/PDN TDC-F1: PB-Free Package |
VersionV1 |
Size49kB |
DownloadPCN0204.pdf |
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DescriptionPCN/PDN TDC-F1:Discontinuation of production |
VersionV1 |
Size68kB |
DownloadPDN0711-01.pdf |
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DescriptionPCN/PDN ATMD-GP1 |
VersionV1 |
Size34kB |
DownloadPDN1009-01.pdf |
Ordering Numbers
TDC-GP22:
TDC-GP22 | MNR 1949 | QFN32 | Yes | Tray |
TDC-GP22 | MNR 1950 | QFN32 | Yes | Tape & Reel (5k) |
GP22-EVA-KIT | MNR 1951 | System | Yes | Box |
GP22-DEMO-KIT | MNR 1979 | System | Yes | Box |
TDC-GP21:
TDC-GP21 | MNR 1839 | QFN32 | Yes | Tray |
TDC-GP21 | MNR 1720 | QFN32 | Yes | Tape & Reel (3K/5K) |
GP21-EVA-KIT | MNR 1781 | System | Yes | Box |
TDC-GP2:
TDC-GP2 | MNR 1058 | QFN32 | Yes | Tray |
TDC-GP2 | MNR 1480 | QFN32 | Yes | Tape & Reel (2k) |
TDC-GP1:
TDC-GP1 | MNR 278 | TQFP44 | Yes | Tray |
TDC-GPX:
TDC-GPX | MNR 975 | TQFP100 | Yes | Tray |
TDC-GPX-FG | MNR 1089 | TFBGA120 | Yes | Tray |