SNVAA88 December   2023 LM51581-Q1 , TPS1H000-Q1 , TPS92642-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2System Description
    1. 2.1 Dual Cable Concept
    2. 2.2 Single Cable Concept
  6. 3Camera Module Design with Single Coaxial Cable Connection
    1. 3.1 Power-Over-Coax Filter
    2. 3.2 Boost Converter
    3. 3.3 High-Side Switch
    4. 3.4 Buffer Capacitor
    5. 3.5 LED Driver
    6. 3.6 Serializer
    7. 3.7 Design Steps
  7. 4Test Results
    1. 4.1 LED and PoC Voltage Waveforms
    2. 4.2 Margin Analysis Program Result
    3. 4.3 Differential Supply Noise Level
    4. 4.4 Test Cases
  8. 5Summary
  9. 6References

Margin Analysis Program Result

Margin Analysis Program (MAP) is used to evaluate the FPD-Link high-speed channel performance during the pulsing LED current. In MAP, the adaptive equalization process is disabled. The strobe position and equalization (EQ) level are set manually to create representations of the signal eye which can be used for system evaluation. The following two figures show the MAP result with and without pulsed LEDs.

Green areas indicate that for the given combination of EQ level and strobe position no bit errors have been detected. Red areas indicate where bit errors have been detected.

Figure 4-8 shows the MAP result without pulsing LEDs and Figure 4-8 shows the MAP result with pulsing LEDs. A comparison between both diagrams is showing insignificant differences in the results and therefore negligible impact on the FPD-Link communication from the pulsing LEDs.

GUID-20230928-SS0I-5XZG-HBSJ-NVS2WTXPLKV7-low.pngFigure 4-2 MAP result without pulsing LEDs
GUID-20230928-SS0I-GQPF-X2NZ-0DVVDHV12W8N-low.pngFigure 4-3 MAP result with pulsing LEDs

For more information on MAP, see Margin Analysis Program (MAP) and strobe positions for DS90UB954-Q1 and DS90UB960-Q1.