ADC3421: Input Impedance

Hello,

Could you please share more information on the absolute maximum ratings?
There is no input current spec in absolute maximum rating table in the datasheet.
What is the maximum input current rating for ADC3421 when input voltage is higher than 1.9V?
This will help us size an input resistor.

Wondering if this is related to internal ESD diode’s threshold voltage and maximum current.
Spice model of ADC3421 doesn’t include internal ESD diode model.

Thanks so much for your help.  Keith

Hello,

This does not answer our question about ‘absolute maximum input current rating’ of ADC3421 like the table below for ADS131M0x ADC.

The datasheet of ADC3421 doesn’t have ‘absolute maximum input current’ spec like ADS131M0x ADC.

We are trying to protect ADC3421 from input overstress case like the attached your app note, sbaa506.

Thank you, Keith

Hi Keith,

We will have to check with the design team on what the abs max input current would be for this device.

Let me get back to you in a few days.

Thanks,

Rob