Which a periphery is named as "AMP" in Errata sheet?

[zanzara]

Hello!

In https://www.espressif.com/sites/default ... ata_en.pdf on 3.11 you can read

"3.11. When certain RTC peripherals are powered on, the inputs of GPIO36 and GPIO39 will be pulled down for approximately 80 ns.
Details:
Powering on the following RTC peripherals will trigger this issue:
• SAR ADC1
• SAR ADC2
• AMP ..."

What is means "AMP"?
Thank's.