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CDCLVC1102, CDCLVC1103, CDCLVC1104

CDCLVC1106, CDCLVC1108, CDCLVC1110, CDCLVC1112

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SCAS895B – MAY 2010 – REVISED FEBRUARY 2017

Product Folder Links: CDCLVC1102 CDCLVC1103 CDCLVC1104 CDCLVC1106 CDCLVC1108 CDCLVC1110

CDCLVC1112

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Copyright © 2010–2017, Texas Instruments Incorporated

Figure 13 shows this recommended power supply decoupling method.

Figure 13. Power Supply Decoupling

10.1 Power Considerations

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:

•

Power used by the device as it switches states.

•

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

and Figure 1 can be used to obtain the power consumption of the device:

Pdev = Pstat + n (Pdyn + PCload)

Pstat = VDD × IDD

Pdyn + PCload = see and Figure 1

where:

VDD = Supply voltage ( or 2.5 V)

IDD = Static device current (typical 6 mA for VDD = 3.3 V; typical 3 mA for VDD = 2.5 V)

n = Number of switching output pins

Example for device power consumption for CDCLVC1104: four 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 × IDD = 6 mA × 3.3 V = 19.8 mW

n (Pdyn + PCload) = 4 × 10 mW = 40 mW

NOTE

For dimensioning the power supply, the total power consumption must be considered. The

total power consumption is the sum of the device power consumption and the power

consumption of the load.