ESP32C3 lib of ad-read error

[voidlaobai]

Board

esp32-c3-devkitm-1

Device Description

nop

Hardware Configuration

nop

Version

v2.0.3

IDE Name

Arduino IDE

Operating System

Windows10

Flash frequency

80Mhz

PSRAM enabled

no

Upload speed

115200

Description

I want to read ad value.But here is a problem,i find C3's arduino lib ad attenuation have diference with datasheet.
datasheet show 750，1050，1300，2500 (mV)
but the arduino lib esp32-hal-adc.c Line 249 show
switch(__analogAttenuation){
case 3: max_mv = 3900; break;
case 2: max_mv = 2200; break;
case 1: max_mv = 1500; break;
default: break;
}

Sketch

nop

Debug Message

nop

Other Steps to Reproduce

No response

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.