SNOU189 May   2022 TLV3811

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Features
    2. 1.2 EVM Specifications
      1. 1.2.1 Recommended Equipment
  3. 2How to Make a TPHL Propagation Delay Measurement With Split Supplies
  4. 3Board Setup
    1. 3.1 Supply Voltage
    2. 3.2 Inputs
    3. 3.3 Outputs
  5. 4Layout Guidelines
  6. 5Schematic
  7. 6Bill of Materials

3.3 Outputs

C7 and C8 are installed with 0.1-uF capacitors. If a 100-Ω differential probe is unavailable to measure the LVDS output, these capacitors allow for the AC portion of the signal to be seen on a 50-Ω terminated scope. Keep in mind that any duty cycle other than 50% will result in a DC portion of the signal that is not halfway between VOH and VOL. As mentioned earlier, this is because of the charging and discharging of the capacitors. A higher duty cycle will result in a higher DC output voltage because the capacitors are charging more than they are discharging.

Figure 3-4 Output Side Schematic

If equipment is available to measure the LVDS output with a respect to the 100-Ω resistor or with a differential probe, then C7 and C8 can be replaced with 0-Ω resistors to keep the DC integrity of the output signal.