STW81101AT STMicroelectronics, STW81101AT Datasheet - Page 22

• 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

Circuit description
Note:
22/53
Table 7.
The current is output on pin ICP. During VCO auto calibration, the ICP and VCTRL pins are
forced to VDD/2
Figure 18. Loop filter connection
CPSEL2
0
0
0
0
1
1
1
1
VDD
Current value vs. selection
CPSEL1
0
0
1
1
0
0
1
1
BUF
BUF
CPSEL0
0
1
0
1
0
1
0
1
Charge
Pump
Current
2*I
3*I
4*I
5*I
6*I
7*I
8*I
I
MIN
MIN
MIN
MIN
MIN
MIN
MIN
MIN
Cal bit
VCTRL
ICP
Value for REXT=4.7 KΩ
C3
0.5 mA
1.0 mA
1.5 mA
2.0 mA
2.5 mA
3.0 mA
3.5 mA
4.0 mA
R1
C1
STW81101
R3
C2