LMK04826B, LMK04828B
SNAS605 AP –MARCH 2013–REVISED JUNE 2013
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Electrical Characteristics (continued)
(3.15 V < VCC < 3.45 V, -40 °C < TA < 85 °C. Typical values at VCC = 3.3 V, TA = 25 °C, at the Recommended Operating
Conditions and are not assured.)
Symbol
CLKout Closed Loop Jitter Specifications a Commercial Quality VCXO(1)
LVDS, BW = 100 Hz to 20 MHz
Parameter
Conditions
Min
Typ
Max
Units
106
104
99
LVDS, BW = 12 kHz to 20 MHz
HSDS 8 mA, BW = 100 Hz to 20 MHz
HSDS 8 mA, BW = 12 kHz to 20 MHz
97
LVPECL16 /w 240 Ω,
BW = 100 Hz to 20 MHz
LMK04826B, VCO0
fCLKout = 245.76 MHz
Integrated RMS Jitter
99
96
fs rms
(2)
LVPECL16 /w 240 Ω,
BW = 12 kHz to 20 MHz
LCPECL /w 240 Ω,
BW = 100 Hz to 20 MHz
100
97
LCPECL /w 240 Ω,
BW = 12 kHz to 20 MHz
JCLKout
LVDS, BW = 100 Hz to 20 MHz
LVDS, BW = 12 kHz to 20 MHz
99
97
92
90
HSDS 8 mA, BW = 100 Hz to 20 MHz
HSDS 8 mA, BW = 12 kHz to 20 MHz
LVPECL16 /w 240 Ω,
BW = 100 Hz to 20 MHz
LMK04826, VCO1
fCLKout = 245.76 MHz
Integrated RMS Jitter
91
89
92
89
fs rms
(2)
LVPECL20 /w 240 Ω,
BW = 12 kHz to 20 MHz
LCPECL /w 240 Ω,
BW = 100 Hz to 20 MHz
LCPECL /w 240 Ω,
BW = 12 kHz to 20 MHz
(1) VCXO used is a 122.88 MHz Crystek CVHD-950-122.880.
(2) Data collected using a Prodyn BIB-100G balun. Loop filter for PLL2 is C1 = 47 pF, C2 = 3.9 nF, R2 = 620 Ω, C3 = 10 pF, R3 = 200 Ω,
C4 = 10 pF, R4 = 200 Ω, PLL1_CP = 450 µA, PLL2_CP = 3.2 mA.. VCO0 loop filter bandwidth = 303 kHz, phase margin = 73 degrees.
VCO1 Loop filter loop bandwidth = 151 kHz, phase margin = 64 degrees. CLKoutX_Y_IDL = 1, CLKoutX_Y_ODL = 0.
18
ELECTRICAL SPECIFICATIONS
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