STW81102ATR STMicroelectronics, STW81102ATR Datasheet - Page 45

• 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

STW81102
8.3
For differential to single conversion, the 50 to 100 Ω Johanson balun (1600BL15B100) is
recommended.
Divided by 4 output
The topology, components, values and considerations of
by 4 output (MATCH_LC_LUMP_1G_DIFF.dsn).
As for the previous sections, a solution to combine the differential outputs is the lumped LC
type balun tuned in the 1 GHz band (
Figure 34. LC lumped balun for divided by 4 output (MATCH_LC_LUMP_1G.dsn)
If you prefer to use an RF balun, you can adapt the topology depicted in
change the balun and the matching components (
0.75 - 1.17 GHz frequency range is the 1:1 Johanson 900BL15C050.
RF
RF
OUTP
OUTN
25 ohm
25 ohm
Vcc
Vcc
5.5nH
5.5nH
4pF
4pF
Figure 34
).
5.5nH
4pF
5.5nH
4pF
Figure 35
Figure 31
6pF
). The suggested balun for the
14nH
Application information
also apply to the divided
Figure 33
50 ohm
, and
45/53