ZHCSIV3 September 2018 DSLVDS1047
PRODUCTION DATA.
When using LVDS devices, it is important to remember to specify controlled impedance PCB traces, cable assemblies, and connectors. All components of the transmission media should have a matched differential impedance of about 100 Ω. They should not introduce major impedance discontinuities.
Balanced cables (for example, twisted pair) are usually better than unbalanced cables (ribbon cable) for noise reduction and signal quality. Balanced cables tend to generate less EMI due to field canceling effects and also tend to pick up electromagnetic radiation as common-mode (not differential mode) noise which is rejected by the LVDS receiver.
For cable distances < 0.5 M, most cables can be made to work effectively. For distances 0.5 M ≤ d ≤ 10 M, CAT5 (Category 5) twisted pair cable works well, is readily available and relatively inexpensive.
| DESIGN PARAMETERS | EXAMPLE VALUE |
|---|---|
| Driver Supply Voltage (VCC) | 3.0 to 3.6 V |
| Driver Input Voltage | 0 to 3.6 V |
| Driver Signaling Rate | DC to 400 Mbps |
| Interconnect Characteristic Impedance | 100 Ω |
| Termination Resistance | 100 Ω |
| Number of Receiver Nodes | 1 |
| Ground shift between driver and receiver | ±1 V |