STW81102 datasheet(14/43 Pages) STMICROELECTRONICS

부품명	STW81102

상세설명	Multi-band RF frequency synthesizer with integrated VCOs

PDF	43 Pages

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제조업체	STMICROELECTRONICS [STMicroelectronics]

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Typical performance characteristics

STW81102

14/43

Typical performance characteristics

The phase noise is measured with the Agilent E5052A Signal Source Analyzer. All the

closed-loop measurements are done with fSTEP=200 KHz setting properly the fPFD and the

Charge Pump current. The loop filter configuration used is depicted in the paragraph 8

(Application Diagram) and the Reference Clock signal is at 76.8 MHz with phase noise of -

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

Figure 3.

VCO A (Direct output) open loop

phase noise

Figure 4.

VCO B (Direct output) open loop

phase noise

Figure 5.

VCO A (Direct output) closed loop

phase noise at 3.6GHz

(FSTEP=200KHz; FPFD=200KHz;

ICP=3mA)

Figure 6.

VCO B (Direct output) closed loop

phase noise at 4.3GHz

(FSTEP=200KHz; FPFD=200KHz;

ICP=4mA)

1. 2 ° r m s

1.4° rms

STW81102 데이터시트(PDF) 14 Page - STMicroelectronics