The VL53L1X can do 50Hz - or 50 ranges per second.
If you want to go a little faster, you can go with the VL53L1CB. Same part basically, but the software running it is a touch more complex, and the parts are selected to insure they can the run the fancier code.
We get that 2X faster by cheating a little bit...
Time of Flight and Radar have an issue called aliasing - or wrap-around. It's when one pulse gets confused with the one prior to it. To combat this, we range with one pulse repetition, then with a different one.
the VL53L1X does both halves then reports an answer. This is ideal for ranging infrequently.
But if you are ranging continuously, it makes more sense to report the answer after every half range, knowing that the prior range is enough to solve the aliasing issue.
Using the VL53L1CB, you can range continuously at 100Hz.
But there are other advantages. With the CB, the sensor works differently. The sensor takes a histogram of the photon arrival times and reports those to your MCU. You MCU actually digs out the result. And this arrangement means you get a better answer. But the code we provide is more complex.
- john
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