Design Challenges:

• Input signals can be bipolar in nature (contains both positive and negative voltages) or the signals can originate from circuits operating at different supply voltage than downstream digital circuitry.
• The timing accuracy of the input signals needs to be preserved. This includes rising and falling edges of the waveforms.
• Downstream control devices require standard, single-ended logic levels at the inputs.

How High-Speed, High-Voltage Comparators with Separate Supplies Benefit the System

• The ability of a comparator to operate from independent input and output supplies eliminates the need to level shift input signals, greatly simplifying the input signal path.
  • The input supplies can be bipolar (+/-15V), while the output supply is ground referenced (single-ended) 3.3V or 5V.
  • The input supply can be single-ended 12V, 24V, or 36V, while the output supply is standard logic level.
• Fast propagation delay minimizes timing delays from input monitoring to output control.
• Push-pull output stage allows output rising and falling edges to have similar timing characteristics and shape.