STM8L ADC输入绘图电流

我正在使用STM8L052r8来测量ADC通道24/25的温度。我正在使用经过验证的ADC例程，但我的预期数量并不正确。

看来我在ADC引脚的输入端有一个电压降/电流流过R1。
任何人都可以告诉我，从ADC输入到接地的微电路中存在什么内部电阻，以及我可能期望在那里流动的那种电流。
我将ADC引脚配置为浮动输入，并禁用施密特触发器。
温度探头连接在THP1和THM1上。 R2是驱动电阻9k09，R2与ADC输入串联1k。

我打赌真的很简单，但我对此很新。
提前致谢，
理查德



以下为原文





I’m using the STM8L052r8 to measure temperatures on the ADC channels 24/25. I’m using a proven ADC routine but my expected counts aren’t coming in correct.



It seems I've got a volt drop/ current flow across R1 on the input to the ADC pin.

Could anyone tell me what internal resistance there is in the micro from the ADC input to ground please, and the kind of current I can expect to be flowing there.

I have the ADC pins configured as input floating, with the Schmitt trigger disabled.

The temperature probe is connected across THP1 and THM1. R2 is the drive resistor 9k09, R2 is a 1k in series with the ADC input.



Really simple I bet but I'm pretty new to this.

Thanks in advance,
Richard