-Does the PGA460 have a feature where at powerup a "calibration" pulse that can be used to set the baseline threshold for object detection or are there any type of adaptive thresholds? If not, is there a way the PA460 can output information to a microcontroller and have that set the threshold based on a dynamic environemnt?
I’ve read through the FAQ section which compares different ultrasonic sensing IC's but still need help selecting the ultrasonic IC for my application.
Application:
The Ideal sensing IC would take an intial TX and RX to set a baseline threshold for comparison later, then go sleep to save power and a micro would wake up from sleep ~twice a second to prompt the sensing IC to also wake up and transmit. Once awake the sensing IC would listen for a return pulse and compare that to the baseline threshold, if no new objects were detected it would go back to sleep, if an object was detected that wasn't in the baseline threshold it would pull an interrupt pin to to wake the micro high and then go back to sleep until prompted again. This way the micro would sleep unless it wakes up to trigger the sensing IC and the micro doesn't have to stay awake to perform object analysis on the return echo.
-Battery powered (low current draw is key)
-object detection (Could potentially use a TOF threshold)
-Single or dual transducer
-water coupled piezo
-Proximity and object sensing
