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OP4260-1 - 32 Digital Outputs

The OP4260-1 provides 32 push-pull digital outputs divided into two banks of 16. Each bank can be separately powered by the user. The board accepts up to 30Vdc and can sink or source 50 mA dc (recommended) with no trip action.

Higher currents trip the current protection and all the output levels provided in this datasheet are not applicable.


  • 32 Dout push-pull
  • Wide operating voltage range: Vuser* 5 Vdc to max 30 Vdc
  • Load current up to 50 mA DC per output
  • O/V and reverse voltage supply protection
  • Short-circuit current limitation
  • Operating frequency DC-500kHz
  • Low ON/OFF time propagation delay: <=200ns @ 25°C at 5 V, <=90ns @ 25°C at 30 V
  • Outputs are tri-stated when VUser is not present.
  • Outputs may be connected in parallel for higher (2 times) current capability: use matched pair (example: DOUT_0 with 1, DOUT_2 with 3, etc.)

* For more information about the use of Vuser and Vrtn pleaser refer to this article in the OPAL-RT knowledge base : How to power the different DB37 boards for digital outputs.

Circuit description

OP4260-1 block diagram


Users should adjust the power supply level (through the DB37 connector) to get the proper high voltage level at the DOUT.

Use a proper damping circuit, (a serial resistor-capacitor circuit tied to the GND as close as possible to the user Device Under Test) to minimize ringing and over/undershoot according to the connection length (from OP4260-1 to user device).

The following parameters are a good starting point for the RC values: R=10Ω, C = 1000pF. Tuning is necessary, according to application parameters. 

The OP4260-1 cassette includes the OP5360-2 mezzanine card.

OPAL-RT TECHNOLOGIES, Inc. | 1751, rue Richardson, bureau 1060 | Montréal, Québec Canada H3K 1G6 | | +1 514-935-2323