TIME TO DIGITAL CONVERTERS
AS6501: 2 Channel Time to Digital Converter (TDC)
The AS6501 is a two-channel time-to-digital converter that is ideal for high speed measurement tasks like range finders and medical imaging.
The AS6501 features high speed LVDS interfaces for Start and Stop signals 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 with up to 70 Msamples/s and unlimited measurement range.
All internal stop measures are calculated by AS6501, proportionate to the applied reference clock. It is feasible to combine the lowest pulse-to-pulse spacing of less than 5 ns, the highest data throughput rate of 70 MSPS per stop input, and the best single shot precision of 10 ps.
Products
Features
- 2 stop channels with 5 ns / 20 ns pulse-to-pulse spacing.
- Maximum 70 MSPS per LVDS output.
- Single shot accuracy 20 ps RMS resolution per channel, 10 ps RMS with high resolution option.
- Unlimited measuring range 0s to 16s.
- Differential reference clock input 2 MHz to 12.5 MHz, optional with quartz.
- LVDS Inputs and outputs, 16-stage FIFO per channel, SPI compatible 4-wire interface for configuration, optionally to be used for data readout.
- Automatic calibrationto reference clock.
- Supply voltage 3.3 V.
- Power dissipation up to 450 mW, standby current 60 μA.
- QFP48 package (7 x 7 mm², 9 × 9 mm² with leads).
Benefits
- Simple data post-processing thanks to calibrated results.
- Event assignment thanks to reference clock and index simplifies coincidence measurements.
- EAsy pulse width measurements.
- High efficiency due to high sample rate.
- Compact design thanks to small package and low number of external components.
- Reduced cooling because of low power consumption.
Documentation & Downloads
AS6501 Downloads
Ordering Numbers
| Type | Part number | Package | RoHS compl. | Shipping package |
|---|---|---|---|---|
| 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 |
