industry news
Subscribe Now

Compact ams time-to-digital converter provides high precision in optical ranging and 3D scanning

AS6500 in small 6mm x 6mm package measures time intervals to a resolution of 10ps

Premstaetten, Austria (5 March, 2019) — ams (SIX: AMS), a leading worldwide supplier of high performance sensor solutions, has introduced the AS6500, a new high-resolution time-to-digital converter (TDC) featuring CMOS inputs and compact packaging for use in space- and cost-constrained applications.

TDCs from ams can measure time intervals as short as 5ns with 10ps precision. The AS6500 is based on the existing ams TDC-GPX2, and offers resolution up to 10ps on four channels and a sampling rate of up to 1.5Msamples/s.

With high precision and a high sampling rate, light detection and ranging (LIDAR) and optical ranging systems in cars, drones and robots can make extremely detailed and accurate ranging measurements with a wide field of view, enabling them to perform accurate object detection and avoidance. In virtual- and augmented-reality applications, real-time 3D image rendering is supported by high sampling speeds and precision in one-centimeter detail.

The AS6500 TDC is optimized for space, power and cost. Like the TDC-GPX2, it is an integrated four-channel converter IC offering single-measurement resolution of up to 20psrms per channel in normal mode, and 20ns pulse-to-pulse spacing. Operating in dual-channel high-resolution mode, it can achieve a maximum resolution of 10psrms with 5ns pulse-to-pulse spacing.

The AS6500 is housed in a new, smaller 40-lead QFN package with a footprint of just 6mm x 6mm, making it 56% smaller than the TDC-GPX2. Its highly integrated design, which includes a 2MHz-12.5MHz reference clock input, means that few external components are required alongside the device.

Operating from a 3.3V supply, the AS6500 typically consumes just 60mW in normal operation, and draws 60µA in stand-by mode. It supports CMOS interfaces from a host system, and provides its calibrated output as a digital signal over a standard serial peripheral interface (SPI), for easy data processing in a host controller or processor.

The AS6500 is ideal for optical applications including general-purpose laser distance measurement in 1D, 2D and 3D, speed control, vehicle/truck scanning, object recognition, time-of-flight spectroscopy, automated test equipment (ATE), biomedical technology and analytics.

ams supplies a development kit, the AS6500-QF_DK, which includes a programmer and GUI software for PCs, enabling users to configure and connect their Start and Stop signals and begin taking sample time measurements within minutes.

“Increasing numbers of design teams are looking to implement laser ranging or 3D scanning systems in handheld or consumer devices, and limited space on the board is, in many cases, a design constraint. Using the AS6500 enables designers both to achieve very high levels of accuracy and precision, and to restrict the board footprint to a very small size,” said Norbert Breyer, Product Manager at ams.

“The AS6500 provides a critical block of an optical sensor system, and is compatible both with today’s AFD-based and with future SPAD-based receiver components,” he added.

The AS6500 is available now in production volume. Unit pricing is available on request from ams. For more technical information, go to https://ams.com/AS6500 

Leave a Reply

featured blogs
Mar 18, 2019
My latest article on embedded.com has been published. This piece is the thirtieth installment of the RTOS Revealed series, which will continue to appear for the next few months. The series covers every aspect of real time operating systems. Nucleus SE RTOS initialization and ...
Mar 18, 2019
Today'€™s dense and complex PCB designs require realistic 3D view to investigate the design issues way before they are ready for manufacturing. The complexity of the PCB designs is increasing... [[ Click on the title to access the full blog on the Cadence Community site. ]...
Mar 15, 2019
Readers of the Samtec blog are familiar with the benefits of FMC and FMC+. These popular interfaces define a compact electro-mechanical expansion interface for a daughter card to an FPGA baseboard or other device with re-configurable I/O capability. VITA 57.1 has been around ...
Jan 25, 2019
Let'€™s face it: We'€™re addicted to SRAM. It'€™s big, it'€™s power-hungry, but it'€™s fast. And no matter how much we complain about it, we still use it. Because we don'€™t have anything better in the mainstream yet. We'€™ve looked at attempts to improve conven...