ams, a supplier of sensor solutions, introduced the AS6501, a two-channel time-to-digital converter (TDC) which enables high-speed scanning and high precision in single-beam optical ranging equipment and medical imaging systems.

The AS6501 features high-speed LVDS interfaces for the Start and Stop signals at the light source in optical ranging equipment and scanners, and LVDS measurement outputs. It can be used to measure the time-of-flight of optical signals to a precision of 20ps per channel, or 10ps in dual-channel high-resolution mode, and captures measurements at very high speeds of up to 70Msamples/s.

Single-beam laser ranging systems based on the precise, high-speed AS6501 can render extremely accurate and detailed outlines of objects in the field of view – an essential requirement of new assisted and autonomous driving systems in vehicles. Positron emission tomography (PET) medical imaging systems can also use the AS6501 to produce highly detailed images of a patient’s body.

Other features include:

  • Two-channel AS6501 is housed in a QFP48 package measuring just 7mm x 7mm
  • Forty percent reduction in board footprint 
  • Includes on-board logic for measuring the time interval between the Start and Stop signals
  • Can also be used in designs based on a microcontroller which require a serial peri-pheral interface (SPI)
  • Features a four-wire SPI for configuration settings, which can also optionally be used for data read-out