Other Parts Discussed in Thread: IWRL6432
We are designing a radar-based traffic monitoring system using the IWR6843. This is a solar-powered product, so power consumption is a big concern. We considered the newer IWRL6432, but we don't believe it fits this application well. Our design will send a chirp frame once every second, looking for an oncoming vehicle. We want to be able to detect cars at 100+ meters. Once a vehicle is detected, we will switch the frame rate from 1 to 5 Hz to measure the speed and distance.
I studied the XWR6843 Power Optimization app note (SWRA689) and found it very helpful. Below is a summary of the projected power optimization available during an idle period:
Does this summary seem reasonable or am I double counting some of the power reductions? We can gain 12 mW of further reduction by powering down the DSP, but that would require a complete reset before each new frame. Are there additional software and/or hardware techniques you could recommend? We do not plan to use the GPADC, the CAN-FD, the LVDS ADC output or the HIL interface.
Thanks-
Mike Schell
