You see, I want to know what is the ADC input impedance . Because I want to mesure the voltage value of the battery . So I must select the the right pressure resistance.
I have check the post ,and in this posthttp://support.dialog-semiconductor.com/using-adc-read-voltage-divider-v... 你说: (Without an attenuator, the max input is 1.2V and the input is high impedance : with attenuator set, the max input is 3.6V and ther is a 200K/100K attenuator in front of the ADC .) My question: when the max input is 1.2V and the input is high impedance , what is the high impedance mean ? Did the high impedance > 100M Ω？
Hi liyang,
Please check this post.http://support.dialog-semiconductor.com/adc-input-loading-characteristics
Thanks MT_dialog
Hi,Dialog
I have check the post ,and in this posthttp://support.dialog-semiconductor.com/using-adc-read-voltage-divider-v...
你说:
(Without an attenuator, the max input is 1.2V and the input is high impedance : with attenuator set, the max input is 3.6V and ther is a 200K/100K attenuator in front of the ADC .)
My question:
when the max input is 1.2V and the input is high impedance , what is the high impedance mean ? Did the high impedance > 100M Ω？
Thanks liyang.
Hi liyang,
Without the attenuator meaning 1,2V the input impendance is infinite.
Thanks MT_dialog