ZHCSKF3B April 2017 – October 2019 LMH0397
PRODUCTION DATA.
In CD Mode (EQ/CD_SEL = H), SDI_IO is enabled as an SDI cable driver output. In either CD or EQ Mode, SDI_OUT is an SDI cable driver output. In EQ Mode, SDI_OUT serves as a loop-through output, and in CD Mode, SDI_OUT serves as a secondary cable driver output.
SDI_IO (in CD Mode) and SDI_OUT are designed for transmission across 75-Ω single-ended impedance. The nominal SDI cable driver output amplitude (VOD) is 800 mVp-p single-ended. In the presence of long output cable lengths or crosstalk, the SDI_VOD pin can be used to optimize the cable driver output with respect to the nominal amplitude. Table 8 details VOD settings that can be applied to both SDI_IO and SDI_OUT. The SDI_VOD pin can be overridden through register control. In addition, the nominal VOD amplitude can be changed by register control. For more information, refer to the LMH0397 Programming Guide (SNLU225).
| SDI_VOD | DESCRIPTION |
|---|---|
| H | about +5% of nominal |
| F | 800 mVp-p (nominal) |
| R | about +10% of nominal |
| L | about –5% of nominal |