Tool/software:
Hi,
I want to design a radio battery ultrasonic sensor using TUSS4470, so the main issue is low power.
The idea is to power on (via a mosfet) the chip, take the measure and shut down.
The datasheet states 10ms before the chip can accept any SPI command. Unfortunately current consumption during this phase is 11.5 mA, too high.
But I found that after 1ms of power on if I send a sleep or standby command this is accepted and current consumption goes down according to the power mode selected (220uA/1.5mA).
So why datasheet says 10ms? Ok it's a max value, but from 1 to 10ms the time is long.
Thank you and best regards