LMK04821
,
LMK04826
,
LMK04828
SNAS605AR –MARCH 2013–REVISED DECEMBER 2015
www.ti.com
11 Power Supply Recommendations
11.1 Current Consumption / Power Dissipation Calculations
From Table 84 the current consumption can be calculated for any configuration. Data below is typical and not
assured.
Table 84. Typical Current Consumption for Selected Functional Blocks
(T
A
= 25 ° C, V
CC
= 3.3 V)
POWER POWER
TYPICAL I
CC
DISSIPATED DISSIPATED
BLOCK CONDITION
(mA) in DEVICE EXTERNALLY
(mW) (mW)
CORE and FUNCTIONAL BLOCKS
Dual Loop, Internal
Core PLL1 and PLL2 locked 131.5 433.95 -
VCO0
LMK04826B/LMK04828
13.5 44.55 -
VCO (with VCO divider for
B
VCO1 is selected
LMK04821)
LMK04821 22 72.6 -
OSCin Doubler Doubler is enabled EN_PLL2_REF_2X = 1 3 9.9 -
CLKin Any one of the CLKinX is enabled 4.9 16.17 -
Holdover is enabled HOLDOVER_EN = 1 1.3 4.29 -
HOLDOVER_HITLESS_
Holdover Hitless switch is enabled 0.9 2.97 -
SWITCH = 1
Track mode TRACK_EN = 1 2.5 8.25 -
SYNC_EN = 1 Required for SYNC and SYSREF functionality 7.6 25.08 -
Enabled SYSREF_PD = 0 27.2 89.76 -
Dynamic Digital Delay SYSREF_DDLY_PD = 0
5 16.5 -
enabled
SYSREF Pulser is enabled SYSREF_PLSR_PD = 0 4.1 13.53
SYSREF Pulses mode SYSREF_MUX = 2 3 9.9
SYSREF Continuous SYSREF_MUX = 3
3 9.9
mode
CLOCK GROUP
Enabled Any one of the CLKoutX_Y_PD = 0 20.1 66.33
IDL Any one of the CLKoutX_Y_IDL = 1 2.2 7.26
ODL Andy one of the CLKoutX_Y_ODL = 1 3.2 10.56
Divider Only DCLKoutX_MUX = 0 13.6 44.88
Clock Divider Divider + DCC + HS DCLKoutX_MUX = 1 17.7 58.41
Analog Delay + Divider DCLKoutX_MUX = 3 13.6 44.88
CLOCK OUTPUT BUFFERS
LVDS 100 Ω differential termination 6 19.8 -
HSDS 6 mA, 100 Ω differential termination 8.8 29.04 -
HSDS HSDS 8 mA, 100 Ω differential termination 11.6 38.28 -
HSDS 10 mA, 100 Ω differential termination 19.4 64.02 -
OSCout BUFFERS
LVDS 100 Ω differential termination 18.5 61.05 -
LVCMOS Pair 150 MHz 42.6 140.58 -
LVCMOS
LVCMOS Single 150 MHz 27 89.1 -
102 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated
Product Folder Links: LMK04821 LMK04826 LMK04828
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