ADRF6702 Analog Devices, Inc., ADRF6702 Datasheet - Page 12

• Manufacturer Part Number: ADRF6702
• Description: 1550 Mhz To 2150 Mhz Quadrature Modulator With Integrated Fractional-n Pll And Vco
• Manufacturer: Analog Devices, Inc.

ADRF6702
REGISTER 2—FRACTIONAL DIVIDE CONTROL
With R2[2:0] set to 010, the on-chip fractional divide control
register is programmed as shown in figure 41.
DB23
DB23
DB23
DB23
REGISTER 3—SIGMA DELTA MODULATOR DITHER
CONTROL
With R3[2:0] set to 011, the on-chip sigma delta modulator
dither control register is programmed as shown in figure 42.
The dither restart value can be programmed from 0 to 2
though a value of 1 is typically recommended.
0
0
0
0
DITH1
DITH1
DB22 DB21
DB22 DB21
DB22
DB22
Magnitude
Magnitude
0
0
DITH1
DITH1
Dither
Dither
DV16
DV16
0
0
0
0
1
1
1
1
1
1
0
0
'
'
'
'
DITH0
DITH0
DB21
DB21
0
0
DV15
DV15
Enable
Enable
0
0
1
1
DITH0
DITH0
'
'
'
'
DB20 DB19
DB20 DB19
Dither
Dither
DB20
DB20
DEN
DEN
DEN
DEN
0
0
0
0
1
1
0
0
1
1
0
0
1
1
DV14
DV14
FD10
FD10
1
1
DB19
DB19
DV16
DV16
0
0
'
'
'
'
0
0
0
0
-
0
0
-
-
-
-
-
-
-
Disable (recommended)
Disable (recommended)
1 (recommended)
1 (recommended)
0
0
Dither Magnitude
Dither Magnitude
15 (default)
15 (default)
Enable (default)
Enable (default)
Dither Enable
Dither Enable
DV13
DV13
DB18 DB17 DB16
DB18 DB17 DB16
DB18
DB18
DV15
DV15
1
1
0
0
'
'
'
'
7
7
3
3
0
0
FD9
FD9
0
0
0
0
1
1
-
-
-
-
-
-
-
-
DV12
DV12
DB17
DB17
DV14
DV14
1
1
0
0
'
'
'
'
0
0
Figure 8. Sigma Delta Modulator Dither Control Register (R3)
DV11
DV11
DB16
DB16
DV13
DV13
0
0
1
1
'
'
'
'
0
0
FD8
FD8
0
0
0
0
1
1
-
-
-
-
-
-
-
-
Figure 7. Fractional Divide Control Register (R2)
DB15 DB14
DB15 DB14
DB15
DB15
DV12
DV12
DV10
DV10
0
0
0
0
1
1
'
'
'
'
Fractional Value must be less than Modulus
Fractional Value must be less than Modulus
DB14
DB14
DV11
DV11
FD7
FD7
DV9
DV9
0
0
0
0
0
0
0
0
-
-
-
-
-
-
-
-
1
1
0
0
'
'
'
'
17
DB13 DB12
DB13 DB12
FD10
FD10
DB13
DB13
DV10
DV10
-1,
Rev. PrE | Page 12 of 18
DV8
DV8
1
1
0
0
'
'
'
'
FD6
FD6
0
0
0
0
0
0
-
-
-
-
-
-
-
-
DB12
DB12
FD9
FD9
DV9
DV9
Dither Restart Value
Dither Restart Value
DV7
DV7
0
0
1
1
'
'
'
'
DB11
DB11
DB11
DB11
FD8
FD8
DV8
DV8
FD5
FD5
DV6
DV6
0
0
0
0
0
0
-
-
-
-
-
-
-
-
0
0
1
1
'
'
'
'
The FRAC value is the preset fractional modulus ranging from 0
to MOD-1.
DB10
DB10
DB10
DB10
FD7
FD7
DV7
DV7
FD4
FD4
DV5
DV5
0
0
0
0
0
0
1
1
-
-
-
-
-
-
-
-
0
0
'
'
'
'
Fractional Divide Ratio
Fractional Divide Ratio
DB9
DB9
FD6
FD6
DB9
DB9
DV6
DV6
DV4
DV4
FD3
FD3
1
1
0
0
'
'
'
'
0
0
0
0
0
0
-
-
-
-
-
-
-
-
DB8
DB8
FD5
FD5
DB8
DB8
DV5
DV5
DV3
DV3
FD2
FD2
1
1
0
0
'
'
'
'
0
0
0
0
0
0
-
-
-
-
-
-
-
-
DB7
DB7
FD4
FD4
DB7
DB7
DV4
DV4
Preliminary Technical Data
DV2
DV2
0
0
1
1
'
'
'
'
FD1
FD1
DB6
DB6
FD3
FD3
0
0
0
0
0
0
DB6
DB6
DV3
DV3
-
-
-
-
-
-
-
-
DV1
DV1
(
(
0
0
1
1
'
'
'
'
DB5
DB5
FD2
FD2
FD0
FD0
DB5
DB5
DV2
DV2
0
0
1
1
0
0
-
-
-
-
-
-
-
-
DV0
DV0
1
1
Fractional Value
Fractional Value
1
1
'
'
'
'
DB4
DB4
FD1
FD1
DB4
DB4
DV1
DV1
768
768
<MDR
<MDR
0x00001 (default)
0x00001 (default)
0x1FFFF
0x1FFFF
' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
default)
default)
0
0
1
1
-
-
-
-
-
-
-
-
Dither Restart Value
Dither Restart Value
DB3
DB3
FD0
FD0
DB3
DB3
DV0
DV0
C3(0)
C3(0)
C3(0)
C3(0)
DB2
DB2
DB2
DB2
Control Bits
Control Bits
Control Bits
Control Bits
C2(1)
C2(1)
C2(1)
C2(1)
DB1
DB1
DB1
DB1
C1(0)
C1(0)
C1(1)
C1(1)
DB0
DB0
DB0
DB0