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OMAP4460 Datasheet, PDF (136/444 Pages) Texas Instruments – Multimedia Device
OMAP4460
SWPS046A – JANUARY 2012
Public Version
www.ti.com
a
Tx
Rdrv
Rload
Pad
vdds
Pulldown Turn-on
time measurement
Rdrv
a
Tx
Pad
Rload
Pullup Turn-on
time measurement
Vdds/2
vss
• Rload is kept equal to average Rdrv value for a given drive-strength setting level.
• Turn-on time is measured as time between 10% to 90% of the signal swing on pad.
Figure 3-1. Output Turn-on Time Measurement
SWPS040-121
VDDS
1 nH
A[0--> 1]
Driver
VDDS_L
VSSS_L
1 nH
PAD
5 pF Load
VSS
VSS
SWPS040-122
Figure 3-2. Output Supply Noise Measurement Setup(1)(2)
(1) Maximum supply noise = VDDS – minimum (VDDS_L – VSSS_L)
(2) 1 nH is used for a typical package inductance on the supplies.
136 Electrical Characteristics
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