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ADRF6655ACPZ-R7 Datasheet(PDF) 32 Page - Analog Devices

Part # ADRF6655ACPZ-R7
Description  Broadband Up/Downconverting Mixer with Integrated Fractional-N PLL and VCO
PDF  44 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADRF6655ACPZ-R7 Datasheet(HTML) 32 Page - Analog Devices

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ADRF6655
Rev. 0 | Page 32 of 44
REGISTER 6—VCO CONTROL AND PLL ENABLES
With R6[2:0] set to 110, the VCO control and PLL enables
register is programmed as shown in Figure 76.
The VCO tuning band is normally selected automatically by the
band calibration algorithm, although the user can directly select
the VCO band using Register 6.
The VCO BS SRC bit (DB9) determines whether the result of
the calibration algorithm is used to select the VCO band, or if
the band selected is based on the value in VCO band select
(DB8 to DB3).
The VCO amplitude can be controlled through Register 6. The
VCO amplitude setting can be controlled between 0 and 63.
The internal VCO can be disabled using Register 6. The internal
VCO LDO can be disabled if an external clean 2.9 V supply is
available to be applied to Pin 40. Additionally, the 3.3 V on-board
LDO can be disabled through Register 6 and an external 3.3 V
supply can be applied to Pin 2.
The internal charge pump can be disabled through Register 6.
Normally, the charge pump is enabled.
CHARGE
PUMP
ENABLE
LDO
3.3V
ENABLE
VCO
ENABLE
VCO
SWITCH
CONTROL
VCO
BS
SRC
VBSRC
0
1
VCOEN
VCO
LDO
ENABLE
VCO AMPLITUDE SETTING
RESERVED
VCO BAND SELECT
CHARGE PUMP ENABLE
VCO BAND CALIBRATION
AND SW SOURCE CONTROL
BAND CALIBRATION
VCOSW
0
1
VCO SWITCH CONTROL FROM SPI
REGULAR
BAND CALIBRATION
SPI
VCO ENABLE
DISABLE
ENABLE
DB22 DB21
DB20
DB19
DB18
DB17
DB16
DB15 DB14 DB13 DB12 DB11 DB10
DB9
DB8
DB7
DB6
DB5 DB4
DB3 DB2 DB1
DB0
CONTROL BITS
DB23
CPEN
L3EN
VCOEN
VCOSW
VC5
VC4
VC3
VC2
VC1
VC0
VBSRC VBS5 VBS4 VBS3 VBS2 VBS1 VBS0 C3(1) C2(1) C1(0)
LVEN
0
1
LVEN
VCO LDO ENABLE
DISABLE
ENABLE
0
1
L3EN LDO 3.3V ENABLE
DISABLE
ENABLE
0
1
CPEN
DISABLE
ENABLE
0
1
00
0
0
24
...
...
VC3
0
1
...
...
1
VC2
0
0
...
...
1
VC4
0
1
...
...
0
VC5
0
0
...
...
1
VC1
0
0
...
...
1
VC0
0
0
47 (RECOMMENDED)
11
1
01
1
...
...
...
...
...
...
...
...
...
1
63
VCO AMPLITUDE
SETTING
0
32
...
VBS3
0
0
...
VBS2
0
0
...
VBS4
0
0
...
VBS5
0
1
...
VBS1
0
0
...
VBS0
0
0
63
11
1
11
1
...
...
...
...
...
...
...
...
VCO BAND
SELECT
FROM SPI
Figure 76. VCO Control and Enables Register (R6)



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