STW81102ATR STMicroelectronics, STW81102ATR Datasheet - Page 26

• Manufacturer Part Number: STW81102ATR
• Description: IC SYNTHESIZER MULTI RF 28VFQFPN
• Manufacturer: STMicroelectronics
• Type: Frequency Synthesizerr

Specifications of STW81102ATR

• Pll: Yes
• Input: Clock, Crystal
• Output: Clock, Crystal
• Number Of Circuits: 1
• Ratio - Input:output: 3:2
• Differential - Input:output: No/No
• Frequency - Max: 4.65GHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-VFQFN, 28-VFQFPN
• Frequency-max: 4.65GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Circuit description
5.10
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External VCO Buffer
Although the main benefits of the STW81102 are the two wideband and low-noise VCOs,
the capability to use an external VCO is also provided.
The external VCO Buffer is able to manage a signal coming from an external VCO in order
to build a synthesizer using the STW81102 only as PLL IC. The output signal of the
synthesizer can also be taken from the output section of the STW81102 (direct, divided by 2
or divided by 4 by) by properly setting the PD[4:0] bits, thus providing additional flexibility.
The external VCO signal can range from 625 MHz up to 5 GHz and its minimum power level
must be -10 dBm.
STW81102