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CDCLVC1104PWR データシート(PDF) 7 Page - Texas Instruments |
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CDCLVC1104PWR データシート(HTML) 7 Page - Texas Instruments |
7 / 23 page tr Yn 80 % V OH -V OL CLKIN tf 20 % V OH -V OL VOH V OL tPLH V DD / 2 Y n V DD / 2 CLKIN tPHL Note : tsk (p) = | tPLH – t PHL | CDCLVC11xx www.ti.com SCAS895 – MAY 2010 PARAMETERS MEASUREMENT INFORMATION (continued) Figure 6. Pulse Skew tsk(p) and Propagation Delay Figure 7. Rise/Fall Times tr/tf tPLH/tPHL TYPICAL CHARACTERISTICS Power Consideration The following power consideration refers to the device-consumed power consumption only. The device power consumption is the sum of static power and dynamic power. The dynamic power usage consists of two components: 1. Power used by the device as it switches states. 2. Power required to charge any output load. The output load can be capacitive only or capacitive and resistive. The following formula and the power graphs in Figure 8 and Figure 9 can be used to obtain the power consumption of the device: Pdev = Pstat + n (Pdyn + PCload) Pstat = VDD x IDD Pdyn + PCload = see Figure 8 and Figure 9 where: VDD = Supply voltage (3.3 V or 2.5 V) IDD = Static device current (typ 6 mA for VDD = 3.3 V; typ 3 mA for VDD = 2.5 V) n = Number of switching output pins Example for Device Power Consumption for CDCLVC1104: 4 outputs are switching, f = 120 MHz, VDD = 3.3 V and Cload = 2 pF per output: Pdev = Pstat + n (Pdyn + PCload) = 19.8 mW + 40 mW = 59.8 mW Pstat = VDD x IDD = 6 mA x 3.3 V = 19.8 mW n (Pdyn + PCload) = 4 x 10 mW = 40 mW NOTE For dimensioning the power supply, the total power consumption needs to be considered. The total power consumption is the sum of the device power consumption and the power consumption of the load. Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): CDCLVC11xx |
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