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ADF4156BRUZ-RL7 Folha de dados(PDF) 11 Page - Analog Devices

Nome de Peças ADF4156BRUZ-RL7
Descrição Electrónicos  6 GHz Fractional-N Frequency Synthesizer
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
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ADF4156BRUZ-RL7 Folha de dados(HTML) 11 Page - Analog Devices

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ADF4156
Rev. 0 | Page 11 of 24
FRAC/INT REGISTER, R0
With R0[2, 1, 0] set to [0, 0, 0], the on-chip FRAC/INT register
is programmed. Figure 17 shows the input data format for
programming this register.
12-Bit INT Value
These twelve bits control what is loaded as the INT value. This
determines the overall feedback division factor. It is used in
Equation 1 (see the INT, FRAC, MOD, and R Relationship
section).
12-Bit FRAC Value
These twelve bits control what is loaded as the FRAC value into
the fractional interpolator. This is part of what determines the
overall feedback division factor. It is also used in Equation 1.
The FRAC value must be less than the value loaded into the
MOD register.
MUXOUT
The on-chip multiplexer is controlled by DB30, DB29, DB28,
and DB27 on the ADF4156. See Figure 17 for the truth table.
DB31
DB30 DB29 DB28 DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0
M4
M3
M2
M1
N12
N11
N10
N9
RE-
SERVED
MUXOUT CONTROL
12-BIT INTEGER VALUE (INT)
12-BIT FRACTIONAL VALUE (FRAC)
CONTROL
BITS
N8
N7
N6
N5
N4
N3
N2
N1
F12
F11
F10
F9
F8
F7
F6
F5
F4
F3
F2
F1 C3(0) C2(0) C1(0)
M4
M3
M2
M1
OUTPUT
0
0
0
0
THREE-STATE OUTPUT
00
0
1
DVDD
0
0
1
0
DGND
0
0
1
1
R DIVIDER OUTPUT
0
1
0
0
N DIVIDER OUTPUT
0
1
0
1
ANALOG LOCK DETECT
0
1
1
0
DIGITAL LOCK DETECT
0
1
1
1
SERIAL DATA OUTPUT
1
0
0
0
RESERVED
1
0
0
1
RESERVED
1
0
1
0
CLK DIVIDER
1
0
1
1
RESERVED
1
1
0
0
RESERVED
1
1
0
1
R DIVIDER/2
1
1
1
0
N DIVIDER/2
1
1
1
1
RESERVED
F12
F11
.......... F2
F1
FRACTIONAL VALUE (FRAC)
0
0
.......... 0
0
0
0
0
.......... 0
1
1
0
0
.......... 1
0
2
0
0
.......... 1
1
3
.
.
.......... .
.
.
.
.
.......... .
.
.
.
.
.......... .
.
.
1
1
.......... 0
0
4092
1
1
.......... 0
1
4093
1
1
.......... 1
0
4094
1
1
.........
1
1
4095
N12
N11
N10
N9
N8
N7
N6
N5
N4N3
N2N1INTEGER VALUE (INT)
0
0
0
00
0
0
10
1
1
1
23
0
0
0
00
0
0
11
0
0
0
24
0
0
0
00
0
0
11
0
0
1
25
0
0
0
00
0
0
11
0
1
0
26
.
.
.
..
.
.
..
.
.
.
.
.
.
.
..
.
.
..
.
.
.
.
.
.
.
..
.
.
..
.
.
.
.
1
1
1
11
1
1
11
1
0
1
4093
1
1
1
11
1
1
11
1
1
0
4094
1
1
1
11
1
1
11
1
1
1
4095
Figure 17. FRAC/INT Register (R0) Map


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