EVAL-ADF7021-VDB2Z Analog Devices Inc, EVAL-ADF7021-VDB2Z Datasheet - Page 46

• Manufacturer Part Number: EVAL-ADF7021-VDB2Z
• Description: 868 - 870MHz - EVALUATION BOARD
• Manufacturer: Analog Devices Inc
• Type: Transceiverr

Specifications of EVAL-ADF7021-VDB2Z

• Frequency: 868MHz ~ 870MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: ADF7021
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADF7021-V
REGISTER 1—OSCILLATOR REGISTER
•
The R_COUNTER and XTAL_DOUBLER relationship is
as follows:
If XTAL_DOUBLER = 0,
If XTAL_DOUBLER = 1,
PFD
PFD
=
=
R
R
_
_
XTAL
COUNTER
COUNTER
XTAL
×
2
RESERVED
RFD1 RF_DIVIDE_BY_2
0
1
VE1
0
1
OFF
ON
RSET = 3.6kΩ
BUFFER_
IMPEDANCE
50Ω
HIGH IMPEDANCE
CP2
0
0
1
1
CP1
0
1
0
1
Figure 63. Register 1—Oscillator Register Map
I
0.3
0.9
1.5
2.1
CP
(mA)
Rev. 0 | Page 46 of 60
XTAL_
BIAS
XB2 XB1
0
0
1
1
0
1
0
1
X1 XOSC_ENABLE
0
1
OFF
ON
D1
0
1
•
•
XTAL_BIAS
20µA
25µA
30µA
35µA
DISABLED
XTAL_
DOUBLER
ENABLED
CLKOUT_DIVIDE is a divided-down and inverted version
of the XTAL and is available on Pin 36 (CLKOUT).
Set XOSC_ENABLE high when using an external crystal.
If using an external oscillator (such as TCXO) with CMOS
level outputs into Pin OSC2, set XOSC_ENABLE low. If
using an external oscillator with a 0.8 V p-p clipped sine
wave output into Pin OSC1, set XOSC_ENABLE high.
CLKOUT_
DIVIDE
CL4
0
0
0
.
.
.
1
CL3
0
0
0
.
.
.
1
R_COUNTER
CL2
0
0
1
.
.
.
1
R3
0
0
.
.
.
1
R2
0
1
.
.
.
1
CL1
0
1
0
.
.
.
1
R1
1
0
.
.
.
1
CLKOUT_
DIVIDE RATIO
OFF
2
4
.
.
.
30
RF R_COUNTER
DIVIDE RATIO
1
2
.
.
.
7
ADDRESS
BITS