參數(shù)資料
型號(hào)： ADRF6704ACPZ
廠商： ANALOG DEVICES INC
元件分類： 調(diào)制器/解調(diào)器
英文描述： 2500 MHz - 2900 MHz RF/MICROWAVE I/Q MODULATOR
封裝： 6 X 6 MM, ROHS COMPLIANT, MO-220VJJD-2, LFCSP_VQ, CP-40-1, 40 PIN
文件頁(yè)數(shù)： 8/18頁(yè)
文件大小： 581K
代理商： ADRF6704ACPZ
ADRF6704
Preliminary Technical Data
REGISTER 6 VCO CONTROL AND ENABLES
With R6[2:0] set to 110, the VCO Control and Enables register
is programmed as shown in figure 16.
VCO band selection is normally selected based on BANDCAL
calibration, though the user can directly select the VCO band
using register 6. The VCO BS SRC determines whether the
BANDCAL calibration will determine the optimum VCO
tuning band, or if the external SPI interface will be used to
select the VCO tuning band based on the value of the VCO
Band Select.
The VCO amplitude can be controlled through register 6. The
VCO amplitude setting can be controlled between 0 and 31
decimal, with a default value of 31.
The internal VCO can be disabled using register 6. The
internal VCO LDO can be disabled if an external clean 2.5V
supply is available to be applied to pins 9 and 16.
Additionally the 3.3V on-board LDO can be disabled through
register 6 and an external 3.3V supply can be applied to pin 2.
The internal charge pump can be disabled through register 6.
Normally the charge pump will be enabled.
L3EN
3.3V LDO
Enable
0
Disable
1
Enable (default)
Charge
Pump
Enable
LDO
3.3V
Enable
VCO
LDO
Enable
VCO
Enable
VCO
Switch
Control
VCO
BS
SRC
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
CPEN
L3EN
LVEN VCOEN VCOSW
VC5
VC4
VC3
VC2
VC1
VC0
VBSRC VBS5
VBS4
VBS3
VBS2
VBS1
VBS0
C3(1)
C2(1)
C1(0)
Control Bits
VCO Band Select
VCO Amplitude Setting
VBS5
VBS4
VBS3
VBS2
VBS1
VBS0
VCO Band Select
from SPI
0
'
' ' ' ' ' '
1
0
32
(
default)
'
' ' ' ' ' '
1
63
VC5
VC4
VC3
VC2
VC1
VC0
VCO Amplitude
Setting
0
'
' '
'
0
1
0
24
(
default)
'
' '
'
1
0
1
55
(
recommended)
'
' '
'
1
63
VC5
VC4
VC3
VC2
VC1
VC0
VCO Amplitude
Setting
0
'
' '
'
0
1
0
24
(
default)
'
' '
'
1
0
1
55
(
recommended)
'
' '
'
1
63
VCO Band Calibration
VBSRC
& SW Source Control
0
BANDCAL (default)
1
SPI
VCOSW
0
1
VCO Switch
Control from
SPI
Regular (default)
BANDCAL
Figure 11. VCO Control and Enable(R6)
VCOEN
VCO Enable
0
Disable
1
Enable (default)
LVEN
VCO LDO Enable
0
Disable
1
Enable (default)
Charge Pump
CPEN
Enable
0
Disable
1
Enable (default)
Rev. PrE | Page 16 of 18
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