ZHCSKG2B September 2016 – October 2019 DS280BR820
PRODUCTION DATA.
This example application result demonstrates the DS280BR820 equalizing for pre-channel and post-channel insertion loss introduced by FR4 channels.
Figure 24. 10 in Input Channel and 5 in Output Channel Test Setup
Figure 25. 25.78125 Gbps Eye Diagram with 10 in Input Channel and 5 in Output Channel, Linear Mode
Figure 27. 10.1325 Gbps nPPI Eye Mask with 10 in Input Channel and 5 in Output Channel, Linear Mode
Figure 26. 25.78125 Gbps CAUI-4 Eye Mask with 10 in Input Channel and 5 in Output Channel, FIR Limiting Mode | 25.78125 Gbps (CAUI-4) | 25.78125 Gbps (CAUI-4) | 10.3125 Gbps (nPPI) | |
|---|---|---|---|
| Transmission Line 1 | 10 in 5 mil FR4 + 8 in SMA cable | 10 in 5 mil FR4 + 8 in SMA cable | 10 in 5 mil FR4 + 8 in SMA cable |
| Transmission Line 2 | 5 in 5 mil FR4 + 8 in SMA cable | 5 in 5 mil FR4 + 8 in SMA cable | 5 in 5 mil FR4 + 8 in SMA cable |
| DS280BR820 Rx Channel Loss | 22 dB @ 12.9 GHz | 22 dB @ 12.9 GHz | 10 dB @ 5.2 GHz |
| DS280BR820 Tx Channel Loss | 14.5 dB @ 12.9 GHz | 14.5 dB @ 12.9 GHz | 6 dB @ 5.2 GHz |
| EQ BST1 | 7 | 7 | 7 |
| EQ BST2 | 7 | 7 | 7 |
| EQ BW | 3 | 3 | 3 |
| VOD | 3 | 3 | 2 |
| EQ DC Gain Mode | Low | Low | Low |
| Tx Mode | Linear | FIR Limiting | Linear |
| Tx Main-Cursor | N/A | 16 | N/A |
| Tx Pre-Cursor | N/A | 5 | N/A |
| Tx Post-Cursor | N/A | 10 | N/A |
| Total Jitter @ 1E-15 | 14.8 psP-P | 14.8 psP-P | 17.0 psP-P |
| Differential Eye Height @ 1E-15 | 67 mVP-P | 118 mVP-P | 407 mVP-P |
| Mask violations | N/A | 0 | 0 |