STW81101AT STMicroelectronics, STW81101AT Datasheet - Page 43

• 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
8.2
Figure 30. Evaluation board (EVB4G) matching network (MATCH_EVB4G.dsn)
For differential to single conversion, the 50 to 100 Ω Johanson balun is recommended
(3700BL15B100).
Divided by 2 output
If your application does not require a balanced to unbalanced conversion, the output
matching reduces to the simple circuit shown below
differential to single-ended output network in the 1.65 - 2.2 GHz range
(MATCH_LC_LUMP_2G_DIFF.dsn). You can easily use this solution to provide one single-
ended output that terminates the other output at 50 Ω with a 3 dB power loss.
Figure 31. Differential/single-ended output network
RF
RF
OUTP
OUTN
50 ohm
50 ohm
(MATCH_LC_LUMP_2G_DIFF.dsn)
Vcc
Vcc
RF
RF
5.5nH
5.5nH
12pF
12pF
OUTP
OUTN
50 ohm
50 ohm
2:1
Vcc
Vcc
22nH
22nH
1pF
12pF
10pF
10pF
(Figure
1pF
31), which illustrates a
1.2pF
50 ohm
50 ohm
4.7pF
Application information
1.2pF
50 ohm
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