TDC-GPX2 − General Description Key Benefits & Features The benefits and features of this device are listed below: Figure 2: Added Value of Using TDC-GPX2BenefitsFeatures• 4 stop channels with serial • 20ns pulse-to-pulse spacing • Maximum 35MSPS • 2 combined channels with • Simple data post-processing thanks to • 5ns pulse-to-pulse spacing calibrated results • Maximum 70MSPS • Single shot accuracy • 20ps rms single shot resolution per channel • 10ps rms with high resolution option • Unlimited measuring range 0s to 16s • Differential reference clock input 2MHz to 12.5MHz, optional with quartz • Event assignment thanks to reference clock • Inputs optional with LVDS or CMOS level index simplifies coincidence measurements • Readout with LVDS or SPI • Easy pulse width measurements • 16-stage FIFO per channel • High efficiency thanks high sample rate • Automatic calibration to reference clock (no PLL or DLL) • SPI compatible 4-wire interface for configuration • Compact design thanks to small package • Supply voltage 3.3V and low number of external components • Power dissipation 60mW to 450mW • Reduced cooling thanks to low power • Standby current 60μA consumption • QFN64 (9mm x 9mm) or QFP64 (12mm x 12mm) Applications• Automated Test Equipment • Laser Range Measurement • Medical Imaging • Time-of-Flight Measurement • Particle Physics • Lidar, Radar, Sonar Page 2ams Datasheet Document Feedback [v1-03] 2017-Dec-18 Document Outline General Description Key Benefits & Features Applications Block Diagram Pin Assignments Pin Diagram Pin Description Absolute Maximum Ratings Recommended Operation Conditions Converter Characteristics Power Supply Characteristic Reference Clock and Stop Input Requirements LVDS Data Interface Characteristics Serial Communication Interface Typical Operating Characteristics Histograms Integral Non-Linearity Register Description Configuration Register Overview Detailed Configuration Register Description Read Register Overview Detailed Description Time Measurements and Results Measurements of TDC-GPX2 Output Results Calculation of Time Differences Resolution RMS-Resolution Versus Effective Resolution High Resolution Combining Two Stop Channels Channel Combination for Low Pulse-to-Pulse Spacing Channel Combination for Pulse Width Measurement Input Pins for Time Measurement REFCLKP/N: Reference Clock Input REFOSCI/O: Quartz Driver as Reference Clock RSTIDXP/N: Reference Index Counter Reset STOP1…STOP4P/N: Stop Channels DISABLE/N: Stop Disable Input Levels, CMOS or LVDS LVDS Output Interface Digital Output Interface Output Setup and Configuration: LVDS Output Buffers Differential LCLKIN Input LVDS Single Data Read Output Interface (SDR) LVDS Double Data Read Output Interface (DDR) LVDS Output Test Pattern SPI Communication Interface General Detailed Pin Description Communication Commands (Opcodes) Detailed Command Description Initialization Reset Write / Incremental Write Read / Incremental Read Using SPI Interface for Read-Out of Stop Results Coding of Results Configuration of LSB by REFCLK_DIVISIONS Examples for Codes of Time Measurements Results Maximum Time Differences Conversion Latency and Conversion Rate Converter Latency LVDS Synchronization Latency Conversion Rate Peak Conversion Rate Read-Out Rate Average Conversion Rate Examples for Read-Out Rate with LVDS FIFOs for Adapting Peak and Average Conversion Rate Application Information Configuration Examples Typical Configuration for LVDS Example C++ Code Schematic External Components PCB Layout Package Drawings & Markings Mechanical Data QFN64 QFN64 Tray Information QFP64 QFP64 Tape & Reel Information Soldering & Storage Information Ordering & Contact Information RoHS Compliant & ams Green Statement Copyrights & Disclaimer Document Status Revision Information Content Guide
