DLPS193 November 2020 DLP500YX
When DMD power and/or data and clock inputs are energized, twisting of the DMD, DMD socket, or DMD board must be avoided when trying to align the DMD within an optical engine. This twisting motion can create power intermittences and/or voltage spikes exceeding input power and data specifications of the DMD which may ultimately affect the DMD reliability. PCB power/data/clock/control circuits must be de-energized before making or removing connections, including cables, connectors, probes and bed-of-nails connections.
PCB and System design considerations must take into account ways to prevent external influence of DMD input power clock, data and control signals. Robust connectors must be used which are resistant to intermittent connections or noise spikes if jostled or vibrated. Connectors must be used which are rated to exceed the number of insertion/removal cycles expected in the application. External electromagnetic emitters must not be placed nearby these sensitive circuits unless adequate EMI shielding is properly used. Sufficient bulk decoupling and component decoupling capacitance as well as appropriate PCB layout techniques must be available for all electrical components within the DMD based "system" such that ground bounce does not occur. See the section on Section 10.1 for more layout information.