EVAL-ADF7025DB1 View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'EVAL-ADF7025DB1' PDF : 44 Pages View PDF
REGISTER 1—OSCILLATOR/FILTER REGISTER
VCO BIAS
ADF7025
CLOCKOUT
DIVIDE
R COUNTER
ADDRESS
BITS
FREQUENCY
VA2 VA1 OF OPERATION
0
0
850–920
0
1
860–930
1
0
870–940
1
1
880–950
VCO BIAS
VB4 VB3 VB2 VB1 CURRENT
0
0
0
1
0.25mA
0
0
1
0
0.5mA
.
.
.
.
1
1
1
1
4mA
X1 XTAL OSC
0 OFF
1 ON
VCO BAND
V1 (MHz)
0 862–956
1 431–478
RF R COUNTER
R3 R2 R1 DIVIDE RATIO
0011
0102
....
....
....
1117
XTAL
D1 DOUBLER
0 DISABLE
1 ENABLED
IR2 IR1
00
01
10
11
FILTER
BANDWIDTH
600kHz
900kHz
1200kHz
NOT USED
CP1 ICP(MA)
CP2 RSET 3.6kΩ
0
0
0.3
0
1
0.9
1
0
1.5
1
1
2.1
CLKOUT
CL4 CL3 CL2 CL1 DIVIDE RATIO
0
0
0
0
OFF
0
0
0
1
2
0
0
1
0
4
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1
1
1
1
30
Figure 40. Register 1—Oscillator/Filter Register
Register 1—Oscillator/Filter Register Comments
• The VCO Adjust Bits R1_DB[20:21] should be set to 0 for operation in the 862 MHz to 870 MHz band and set to 3 for operation in the
902 MHz to 928 MHz band.
• VCO bias setting should be 0xA for operation in the 862 MHz to 870 MHz band and 0xC for operation in the 902 MHz to 928 MHz
band. All VCO gain numbers are specified for these settings.
Rev. A | Page 29 of 44
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