STW81101 datasheet(13/48 Pages) STMICROELECTRONICS

13 / 48 page

STW81101

Electrical specifications

13/48

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

Chapter 8: Application information for more details.

VCO A with divider by 2 (1650MHz-1950MHz) – open loop(3)

Phase noise @ 1 kHz

-62

dBc/Hz

Phase noise @ 10 kHz

-89

dBc/Hz

Phase noise @ 100 kHz

-112

dBc/Hz

Phase noise @ 1 MHz

-135

dBc/Hz

Phase noise @ 10 MHz

-151.5

dBc/Hz

Phase noise floor @ 40 MHz

-155

dBc/Hz

VCO B with divider by 2 (1900MHz-2200MHz) – open loop(3)

Phase noise @ 1 kHz

-61

dBc/Hz

Phase noise @ 10 kHz

-89

dBc/Hz

Phase noise @ 100 kHz

-112

dBc/Hz

Phase noise @ 1 MHz

-134

dBc/Hz

Phase noise @ 10 MHz

-151.5

dBc/Hz

Phase noise floor @ 40 MHz

-155

dBc/Hz

VCO A with divider by 4 (825MHz-975MHz) – open loop(3)

Phase noise @ 1 kHz

-68

dBc/Hz

Phase noise @ 10 kHz

-95

dBc/Hz

Phase noise @ 100 kHz

-118

dBc/Hz

Phase noise @ 1 MHz

-141

dBc/Hz

Phase noise @ 10 MHz

-154

dBc/Hz

Phase noise floor @ 40 MHz

-155

dBc/Hz

VCO B with divider by 4 (950MHz-1100MHz) – open loop(3)

Phase noise @ 1 kHz

-67

dBc/Hz

Phase noise @ 10 kHz

-95

dBc/Hz

Phase noise @ 100 kHz

-118

dBc/Hz

Phase noise @ 1 MHz

-140

dBc/Hz

Phase noise @ 10 MHz

-154

dBc/Hz

Phase noise floor @ 40 MHz

-155

dBc/Hz

Phase noise SSB.

VCO amplitude setting to value [11].

All the closed-loop performances are specified using a reference clock signal at 76.8 MHz with phase noise of

-135dBc/Hz @1kHz offset, -145dBc/Hz @10kHz offset and -149.5dBc/Hz of noise floor.

Normalized PN = Measured PN – 20log(N) – 10log(FPFD) where N is the VCO divider ratio (N=B*P+A) and FPFD is the

comparison frequency at the PFD input

Typical Phase Noise at centre band frequency

Table 6.

Phase noise specification (continued)

Parameter

Test conditions

Min

Typ

Max

Unit

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