STW81101AT STMicroelectronics, STW81101AT Datasheet - Page 45

• Manufacturer Part Number: STW81101AT
• Description: IC SYNTHESIZER MULTI RF 28VFQFPN
• Manufacturer: STMicroelectronics
• Type: Frequency Synthesizer (RF)r

Specifications of STW81101AT

• Pll: Yes
• Input: Clock, Crystal
• Output: Clock, Crystal
• Number Of Circuits: 1
• Ratio - Input:output: 3:2
• Differential - Input:output: No/No
• Frequency - Max: 4.4GHz
• 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: 4.4GHz
• Number Of Elements: 1
• Pll Input Freq (min): 10MHz
• Pll Input Freq (max): 200MHz
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: -40C to 85C
• Package Type: VFQFPN
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temperature Classification: Industrial
• Pin Count: 28
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STW81101
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
0.8 - 1.1 GHz frequency range is the 1:1 Johanson 900BL15C050.
RF
RF
OUTP
OUTN
25 ohm
25 ohm
Vcc
Vcc
5.5nH
5.5nH
(Figure
4pF
4pF
34).
5.5nH
4pF
5.5nH
4pF
(Figure
Figure
6pF
35). The suggested balun for the
14nH
31, also apply to the divided
Application information
Figure
33, and
50 ohm
45/53