SLAAE49 February   2022 DAC43204 , DAC53004 , DAC53204 , DAC53204W , DAC63004 , DAC63204

 

  1.   Design Objective
  2.   Design Description
  3.   Design Notes
  4.   Design Simulations
    1.     Transient Simulation Results
    2.     DC Transfer Simulation Results
  5.   Register Settings
  6.   Pseudo Code Example
  7.   Design Featured Devices
  8.   Design References

DC Transfer Simulation Results

The simulation shows the LED current vs the DAC output voltage. The base voltage needs to be 0.7 V less than the emitter voltage for a typical PNP-type BJTs to conduct. In this circuit, the chosen 2N2905 transistor starts conducting when the base voltge exceeds 900 mV.