Are there any suggested protection schemes against ESD that should be considered with these products?
These converters are manufactured on a standard CMOS process and, therefore, all standard practices and protection schemes apply to these devices as with all other CMOS devices. There are ESD protection diodes on all the inputs that protect the device from possible ESD hits due to handling and production. These ESD protection diodes will clamp the voltage at any pin to within 0.5 V of the supplies. They can carry quite high currents but only for a short periof of time so, they can protect the IC from large pulses of short duration (the total energy is quite low). The latchup current is typically 100mA on all pins.
The maximum DC current that these protection diodes can withstand is 10 mA. Therefore, the maximum current that can be applied to any input is 10 mA. If it is possible for a current in excess of 10 mA to be applied to a pin due to an over-voltage, external protection is required. Protection schemes that can be applied include transzorbs on the power supply lines, series resistors on digital input lines, and resistors and diodes on analog inputs. For example, the external protection could be a resistor in series with the input pin to limit the current into the pin to less than 10 mA. For example, if the maximum overvoltage applied to a pin is 5V, a 1 Kohm series resistor in each line will limit the current to 5 mA.
There are a number of application notes and seminar material available on this topic. These are available on www.analog.com:
AN-202 Application Note, An IC Amplifier User’s Guide to Decoupling, Grounding and Making Things Go Right for a Change. www.analog.com/static/imported-files/application_notes/135208865AN-202.pdf
AN-311 Application Note, How to Reliably Protect CMOS Circuits Against Power Supply Overvoltage. www.analog.com/static/imported-files/application_notes/2915025627482692953221605948252614692AN311.pdf
AN-397 Application Note, Electrically Induced Damage to Standard Linear Integrated Circuits. www.analog.com/static/imported-files/application_notes/262799190AN-397.pdf
Overvoltage Effects on Analog ICs. www.analog.com/static/imported-files/seminars_webcasts/36900313320057Section7.pdf
Retrieving data ...