Esp32-s2 higher deep sleep consumption then Esp32?

JonaB111
Posts: 3
Joined: Sun Mar 14, 2021 4:33 pm

Esp32-s2 higher deep sleep consumption then Esp32?

Postby JonaB111 » Wed Jul 14, 2021 4:46 am

Hello, as i want to build a battery powered application, with a long deep sleep time, i want to use an esp32-s2. However in the Datasheet it states, that it has a 4 times higher deep sleep current(20ua), than the "normal" esp32(5ua). Then on the internet i find a chart, where it states both consume only 5ua(See Attachements). What is right and if the Esp32-s2 has a 4 times higher Deep Sleep current: why?
Attachments
esp32_datasheet.png
esp32_datasheet.png (40.37 KiB) Viewed 5391 times
esp32-s2-datasheet.png
esp32-s2-datasheet.png (46.9 KiB) Viewed 5391 times
Comparison.png
Comparison.png (40.34 KiB) Viewed 5391 times

ESP_igrr
Posts: 2072
Joined: Tue Dec 01, 2015 8:37 am

Re: Esp32-s2 higher deep sleep consumption then Esp32?

Postby ESP_igrr » Thu Jul 15, 2021 4:31 pm

Hi JonaB111,
JonaB111 wrote:
Wed Jul 14, 2021 4:46 am
Hello, as i want to build a battery powered application, with a long deep sleep time, i want to use an esp32-s2. However in the Datasheet it states, that it has a 4 times higher deep sleep current(20ua), than the "normal" esp32(5ua). Then on the internet i find a chart, where it states both consume only 5ua(See Attachements). What is right and if the Esp32-s2 has a 4 times higher Deep Sleep current: why?
The information you found is correct, indeed ESP32-S2 chips available now have higher deep sleep current than the ESP32.

In the future there may be a new revision of ESP32-S2 silicon that improves the deep sleep current consumption, but it's not determined yet whether/when it will be made. For the time being, 20uA is the number you can expect.

davidbeccue
Posts: 6
Joined: Mon Dec 27, 2021 3:25 pm

Re: Esp32-s2 higher deep sleep consumption then Esp32?

Postby davidbeccue » Mon Dec 27, 2021 3:35 pm

So if I want to build an application that does ADC conversions 256 times per second (using ULP I'm assuming), and then store that long term in SRAM, which processor should I use for lowest power consumption?

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