M1025 Datasheet, PDF (12/14 Pages) Integrated Circuit Systems – VCSO BASED CLOCK PLL WITH AUTOSWITCH

Integrated
Circuit
Systems, Inc.
M1025/26
VCSO BASED CLOCK PLL WITH AUTOSWITCH
Product Data Sheet
ELECTRICAL SPECIFICATIONS (CONTINUED)
AC Characteristics
Unless stated otherwise, V_CC = 3.3V +5%,T_A = 0 ^oC to +70 ^oC (commercial), T_A = -40 ^oC to +85 ^oC (industrial), F_VCSO = F_OUT = 150-175MHz,
LVPECL outputs termnated with 50Ω to V_CC - 2V
Symbol Parameter
Min Typ Max Unit Conditions
F_IN
Input Frequency
DIF_REF0, nDIF_REF0,
DIF_REF1, nDIF_REF1
15
700 MHz
F_OUT
APR
K_VCO
PLL Loop ^RIN
Constants ¹
Output Frequency
FOUT, nFOUT
Absolute Pull-Range
of VCSO
VCO Gain
Internal Loop Resistor
Commercial
Industrial
Wide Bandwidth
Narrow Bandwidth
62.5
±120
±50
±200
±150
200
100
2100
175 MHz
ppm
ppm
kHz/V
kΩ
kΩ
BW_VCSO VCSO Bandwidth
Φn
Phase Noise
and Jitter
J(t)
Single Side Band
Phase Noise
@155.52MHz
Jitter (rms)
@155.52MHz
odc Output Duty Cycle ²
t_R
Output Rise Time ²
for FOUT, nFOUT
t_F
Output Fall Time ²
for FOUT, nFOUT
1kHz Offset
10kHz Offset
100kHz Offset
12kHz to 20MHz
700
-83
-113
-136
0.4
45
50
350 450
kHz
dBc/Hz ^{Fin=19.44 or}
dBc/Hz
38.88_MHz
Tot. PLL ratio = 8
dBc/Hz or 4. See pg. 3
0.6 ps
55 %
550 ps
20% to 80%
350 450
550 ps
20% to 80%
Table 11: AC Characteristics
Note 1: Parameters needed for PLL Simulator software; see Table 7, Example External Loop Filter Component Values, on pg. 9.
Note 2: See Parameter Measurement Information on pg. 12.
PARAMETER MEASUREMENT INFORMATION
Output Rise and Fall Time
Output Duty Cycle
nFOUT
20%
Clock Output
80%
t_R
80%
V_P-P
20%
t_F
Figure 6: Output Rise and Fall Time
FOUT
odc =
t_PW
t_PERIOD
t_PW
(Output Pulse Width)
t_PERIOD
Figure 7: Output Duty Cycle
M1025/26 Datasheet Rev 1.0
12 of 14
Revised 28Jul2004
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