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ADF4401ABCEZ Datasheet(PDF) 24 Page - Analog Devices

Part # ADF4401ABCEZ
Description  Translation Loop, PLL, VCO Module
PDF  39 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADF4401ABCEZ Datasheet(HTML) 24 Page - Analog Devices

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ADF4401A
Data Sheet
Rev. 0 | Page 24 of 39
Address: 0x10, Default: 0x32, Name: REG0010
16-Bit Integer Word.
0
0
1
1
2
0
3
0
4
1
5
1
6
0
7
0
[7:0] BIT_INTEGER_WORD[7:0] (R/W)
Table 11. Bit Descriptions for REG0010
Bit(s)
Bit Name
Description
Default
Access
[7:0]
BIT_INTEGER_WORD[7:0]
16-Bit Integer Word. Sets the integer value of N (for the internal PLL). Updates to
the PLL N counter, including FRAC1, FRAC2, and MOD2, are double buffered by
this bit field.
0x32
R/W
Address: 0x11, Default: 0x00, Name: REG0011
16-Bit Integer Word.
0
0
1
0
2
0
3
0
4
0
5
0
6
0
7
0
[7:0] BIT_INTEGER_WORD[15:8] (R/W)
Table 12. Bit Descriptions for REG0011
Bit(s)
Bit Name
Description
Default
Access
[7:0]
BIT_INTEGER_WORD[15:8]
16-Bit Integer Word. Sets the integer value of N.
0x0
R/W
Address: 0x12, Default: 0x40, Name: REG0012
Enables Autocalibration.
Pres caler Select.
0
0
1
0
2
0
3
0
4
0
5
0
6
1
7
0
[7] RESERVED
[4:0] RESERVED
[6] EN_AUTOCAL (R/W)
[5] PRE_SEL (R/W)
Table 13. Bit Descriptions for REG0012
Bit(s)
Bit Name
Description
Default
Access
7
RESERVED
Reserved.
0x0
R
6
EN_AUTOCAL
Enables Autocalibration.
0x1
R/W
0: VCO autocalibration disabled.
1: VCO autocalibration enabled.
5
PRE_SEL
Prescaler Select. The dual modulus prescaler for the calibration PLL is set by the PRE_SEL bit.
The prescaler, at the input to the N divider, divides down the VCO signal so the N divider can
handle it. The prescaler setting affects the RF frequency and the minimum and maximum INT
values.
0x0
R/W
0: 4/5 prescaler.
1: 8/9 prescaler.
[4:0]
RESERVED
Reserved.
0x0
R
Address: 0x14, Default: 0x00, Name: REG0014
25-Bit FRAC1 Value.
0
0
1
0
2
0
3
0
4
0
5
0
6
0
7
0
[7:0] FRAC1WORD[7:0] (R/W)
Table 14. Bit Descriptions for REG0014
Bit(s)
Bit Name
Description
Default
Access
[7:0]
FRAC1WORD[7:0]
25-Bit FRAC1 Value. Sets the FRAC1 value.
0x0
R/W



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