I need to drive this Delta Sigma ADC, for current sensing, from a 50mV shunt. The common mode voltage can occasionally goto +6 or -6V.
The absolute maximum ratings specify
Input voltage of VDD+0.3 Max, and AGND-1.6V Min.
Continuous Current to the pin is +10mA or -10mA.
Will it be alright with a series resistors of 5k on the positive & negative inputs to drive this ADC? I can add a diode to VDD for positive side protection, but cannot do so for the negative side, as this ADC generates the negative supply internally with a charge pump and the negative supply pin is not available outside!
I would appreciate any suggestion for any other method of protection.
Thank You for your time.
Rama D
The absolute maximum ratings specify
Input voltage of VDD+0.3 Max, and AGND-1.6V Min.
Continuous Current to the pin is +10mA or -10mA.
Will it be alright with a series resistors of 5k on the positive & negative inputs to drive this ADC? I can add a diode to VDD for positive side protection, but cannot do so for the negative side, as this ADC generates the negative supply internally with a charge pump and the negative supply pin is not available outside!
I would appreciate any suggestion for any other method of protection.
Thank You for your time.
Rama D