STW81103 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STW81103' PDF : 53 Pages View PDF
Electrical specifications
STW81103
Table 6. Phase noise specification (1) (continued)
Parameter
Test conditions
VCO A with divider by 2 (1250 MHz-1525 MHz) – open loop(3)
Phase noise @ 1 kHz
Phase noise @ 10 kHz
Phase noise @ 100 kHz
Phase noise @ 1 MHz
Phase noise @ 10 MHz
Phase noise floor @ 40 MHz
VCO B with divider by 2 (2175 MHz-2500 MHz) – open loop(3)
Phase noise @ 1 kHz
Phase noise @ 10 kHz
Phase noise @ 100 kHz
Phase noise @ 1 MHz
Phase noise @ 10 MHz
Phase noise floor @ 40 MHz
VCO A with divider by 4 (625 MHz-762.5 MHz) – open loop(3)
Phase noise @ 1 kHz
Phase noise @ 10 kHz
Phase noise @ 100 kHz
Phase noise @ 1 MHz
Phase noise @ 10 MHz
Phase noise floor @ 40 MHz
VCO B with divider by 4 (1087.5 MHz-1250 MHz) – open loop(3)
Phase noise @ 1 kHz
Phase noise @ 10 kHz
Phase noise @ 100 kHz
Phase noise @ 1 MHz
Phase noise @ 10 MHz
Phase noise floor @ 40 MHz
Min.
Typ.
Max. Unit
-65
-93
-115
-137
-153
-155
-60
-88
-111
-132
-150
-154
-71
-99
-121
-142
-154
-155
-66
-94
-117
-138
-153
-154
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
1. Phase Noise SSB. VCO amplitude setting to value [11]. All closed-loop performances are specified using a reference clock
signal at 76.8 MHz with a phase noise of -135 dBc/Hz @1 kHz offset, -145dBc/Hz @10kHz offset and -149.5 dBc/Hz of
noise floor.
2.
Normalized
comparison
PN = Measured PN –
frequency at the PFD
20log(N)
input.
–
10log(FPFD),
where
N
is
the
VCO
divider
ratio
(N=B*P+A)
and
FPFD
is
the
3. Typical phase noise at centre band frequency.
An evaluation kit is available upon request, including a powerful simulation tool
(STWPLLSim) that allows a very accurate estimation of the device’s phase noise according
to the desired project parameters (VCO frequency, selected output stage, reference clock,
frequency step, and so on); refer to Section 8: Application information for more details.
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