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ams AS6501 offers speed, precision for LiDAR and medical imaging applications

ams AS6501 offers speed, precision for LiDAR and medical imaging applications

25 September 2018
New time-digital converter for single-beam laser systems renders accurate, detailed outlines of objects in the field of view

Premstaetten, Austria (25 September, 2018) -- ams (SIX: AMS), a leading worldwide supplier of high performance sensor solutions, today 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 dualchannel 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.

By optimizing the AS6501 for single-beam applications, ams has been able to combine very high performance with compact dimensions. The two-channel AS6501 is housed in a QFP48 package measuring just 7mm x 7mm, a 40% reduction in board footprint compared to its four-channel counterpart, the TDC-GPX2. The AS6501, which includes on-board logic for measuring the time interval between the Start and Stop signals, requires few external components. 

Power consumption is as much as ten times lower than that of competing TDCs that offer a similar level of precision: typical power consumption in normal operation is just 450mW at a supply voltage of 3.3V. Stand-by current is 60µA.  The AS6501 can also be used in designs based on a microcontroller which require a serial peripheral interface (SPI).

The AS6501 features a four-wire SPI for configuration settings, which can also optionally be used for data read-out. 

“By creating a compact version of our highly regarded TDC family with two channels, ams has been able to make high-speed time-of-flight measurement possible in a wider range of applications, including those with tight space and cost constraints, while maintaining the extremely high performance of the successful TDC-GPX2 device,” said Norbert Breyer, Product Manager at ams.  The AS6501 is available now in production volumes. Unit pricing is available on request from ams. 

For sample requests or for more technical information, go to 

About ams

ams is a global leader in the design and manufacture of advanced sensor solutions. Our mission is to shape the world with sensor solutions by providing a seamless interface between humans and technology.  ams’ high-performance sensor solutions drive applications requiring small form factor, low power, highest sensitivity and multi-sensor integration. Products include sensor solutions, sensor ICs, interfaces and related software for consumer, communications, industrial, medical, and automotive markets.  With headquarters in Austria, ams employs about 11,000 people globally and serves more than 8,000 customers worldwide. ams is listed on the SIX Swiss stock exchange (ticker symbol: AMS). More information about ams can be found at

  • ams Sensors Germany GmbH 
    Göschwitzer Str. 32
    07745 Jena
    Germany / Europe
    Tel.: +49 3641 2809-0
    Fax: +49 3641 2809-12
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