FREQUENCY GENERATOR/JITTER ATTENUATION DEVICE FOR
WIRELESS INFRASTRUCTURE APPLICATIONS
813076 DATA SHEET
10 REVISION B 7/29/16
TABLE 5B. AC CHARACTERISTICS, V
CC
= V
CCO
= 3.3V±5%, V
EE
= 0V, TA = -40°C TO 85°C (VC = 1, VCXO MODE)
Symbol Parameter Test Conditions Minimum Typical Maximum Units
fosc XTAL Frequency 30.72 MHz
f
OUT
Output Frequency;
NOTE 1
QAx, QBx, QC
nBYPASS = 1, MF = 20, N = 1 614.4 MHz
nBYPASS = 1, MF = 20, N = 4 153.6 MHz
nBYPASS = 1, MF = 20, N = 5 122.88 MHz
nBYPASS = 1, MF = 20, N = 20 30.72 MHz
nBYPASS = 1, MF = 16, N = 1 491.52 MHz
nBYPASS = 1, MF = 16, N = 4 122.88 MHz
nBYPASS = 1, MF = 16, N = 5 98.304 MHz
nBYPASS = 1, MF = 16, N = 20 24.576 MHz
APR Absolute Pull Range -50 50 ppm
BW Modulation Bandwidth of VCXO 200 kHz
L
VC
Tuning Linearity VC = 0.6V to 1.4V ±6.5 %
tjit(Ø)
RMS Phase Jitter;
Integration Range: 12kHz - 20MHz
f
OUT
= 122.88MHz,
XTAL = 30.72MHz
0.88 ps/rms
F
n
Single-Side Band
Phase Noise at
f
OUT
= 122.88MHz
10Hz offset
XTAL = 30.72MHz
-41.18 dBc/Hz
100Hz offset -72.82 dBc/Hz
1kHz offset -104.19 dBc/Hz
10kHz offset -126.63 dBc/Hz
100kHz offset -128.57 dBc/Hz
spurious Does not include harmonic spurs -51 dB
sub harmonics -11 dB
tsk(o)
Output Skew;
NOTE 2
f
QA
= f
QB
= f
QC
240 ps
t
R
/ t
F
Output Rise/Fall Time 20% to 80% 160 700 ps
odc Output Duty Cycle
N ≠ 1
45 55 %
N = 1 40 60 %
NOTE 1: f
OUT
= ((30.72MHz) * MF) ÷ N ± 50ppm.
NOTE 2: Defi ned as skew between outputs at the same supply voltage and with equal load conditions.
