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OP400 Quad Low-Offset, Low-Power Operational Amplifier

Discontinued Product. Please contact the factory for the latest replacement.


Part Number(s): OP400

DDC’s OP400 monolithic quad operational amplifier microcircuit features a greater than 100 krad (Si) typical total dose tolerance, depending upon space mission. Using DDC’s radiation-hardened RAD-PAK® packaging technology, the OP400 has an extremely low input offset voltage no less than 150 mV with a drift of under 1.2 mV/°C, guaranteed over the full military temperature range. The OP400 features low power consumption, drawing less than 725 μA per amplifier.

DDC’s patented RAD-PAK® packaging technology incorporates radiation shielding in the microcircuit package. It eliminates the need for box shielding while providing the required radiation shielding for a lifetime in orbit or space mission. In a GEO orbit, RAD-PA® provides greater than 100 krad (Si) radiation dose tolerance. This product is available with screening up to Class S.


  • RAD-PAK® technology-hardened against natural space radiation
  • Total dose hardness:
    • >100 krad (Si), depending upon space mission
  • Package:
    • 16 pin Rad-Pak® flat package
  • Low input offset voltage 150μV max
  • Low offset voltage drift
    • +1.2μV/°C max (over -55 to +125°C)
  • Low supply current (per amplifier) 725 μA max
  • High open-loop gain 5000V/mV min
  • Input bias current 3 nA Max
  • Low noise voltage density 11 nV per √HZ at 1 kHz
  • Stable with large capacitive loads 10 nF typ




OP400 Quad Low-Offset, Low-Power Operational Amplifier Data Sheet


How Rad Hard Do You Need? The Changing Approach To Space Parts Selection?

Proton Transport An Examination of Model and Experimental Data For Space Environment Protons

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