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STW81101 Datasheet(PDF) 39 Page - STMicroelectronics

Part # STW81101
Description  Multi-band RF frequency synthesizer with integrated VCOs
PDF  42 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STW81101 Datasheet(HTML) 39 Page - STMicroelectronics

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STW81101
Application diagram
39/42
8
Application diagram
Figure 32.
Application diiagram
Note:
1
See Application Information (Section 7) for further information on Output Matching topology.
2
EXT_PD, ADD2, ADD1 (and ADD0 when I2C Bus is selected) can be hard wired directly on
the board.
3
Loop Filter values are for fPFD = 400KHz and ICP = 4mA.
VDD_VCOA
DBUS_SEL
VDD_DIV2
VDD_OUTBUF
OUTBUFP
OUTBUFN
VDD_DIV4
VDD_VCOB
VDD_BUFVCO
EXTVCO_INP
EXTVCO_INN
VDD_PLL
REF_CLK
TEST2
10µ
22p
1n
10µ
22p
1n
150p
220p
6.8n
10µ
22p
1n
51
1.8n
STW81101
From/to
µ-controller
to
µ-controller
loop filter
VDD
1
RF Out
ref clk
VDD
1
VDD
1
VDD
1
VDD
1
VDD
2
10µ
22p
1n
I2C
SPI
1:2
100
100
15p
15p
100
15p
4.7K
8.2K
2.2K



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