EVAL-ADF7021-NDBZ5 Analog Devices Inc, EVAL-ADF7021-NDBZ5 Datasheet - Page 51

• Manufacturer Part Number: EVAL-ADF7021-NDBZ5
• Description: Matching Unpopulated
• Manufacturer: Analog Devices Inc
• Type: Transceiver, FSKr

Specifications of EVAL-ADF7021-NDBZ5

• Frequency: 80MHz ~ 650MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: ADF7021-N
• Lead Free Status / Rohs Status: Supplier Unconfirmed

REGISTER 2—TRANSMIT MODULATION REGISTER
•
The 2FSK/3FSK/4FSK frequency deviation is expressed by
the following:
Direct output
With RF_DIVIDE_BY_2 (R1_DB18) enabled
where Tx_FREQUENCY_DEVIATION is set by
R2_DB[19:27] and PFD is the PFD frequency.
NRC1
Frequency Deviation [Hz] =
Frequency Deviation [Hz] =
0
1
0
Tx_FREQUEN
5 .
DI2
0
0
1
1
TxDATA_
R-COSINE_ALPHA
0.5 (Default)
0.7
INVERT
×
Tx_FREQUEN
DI1
0
1
0
1
TxDATA_INVERT
NORMAL
INVERT CLK
INVERT DATA
INV CLK AND DATA
TFD9
0
0
0
0
.
1
Tx_FREQUENCY_DEVIATION
CY_DEVIATI
...
...
...
...
...
...
...
2
16
CY_DEVIATI
TFD3
0
0
0
0
.
1
2
16
TFD2
0
0
1
1
.
1
ON
P6
0
0
0
0
.
.
1
TFD1
0
1
0
1
.
1
×
ON
Figure 65. Register 2—Transmit Modulation Register Map
PFD
.
.
.
.
.
.
.
1
f
0
1
2
3
.
511
DEV
×
.
.
.
.
.
.
.
.
PFD
P2
0
0
1
1
.
.
1
POWER_AMPLIFIER
P1
0
1
0
1
.
.
1
Rev. 0 | Page 51 of 64
POWER_
AMPLIFIER
0 (PA OFF)
1 (–16.0 dBm)
2
3
.
.
63 (13 dBm)
PA2
0
0
1
1
PR3
0
0
0
0
1
1
1
1
PA1
0
1
0
1
PR2
0
0
1
1
0
0
1
1
•
•
•
PA_BIAS
5µA
7µA
9µA
11µA
PR1
0
1
0
1
0
1
0
1
PA_BIAS
In the case of 4FSK, there are tones at ±3 × the frequency
deviation and at ±1 × the deviation.
The power amplifier (PA) ramps at the programmed rate
(R2_DB[8:10]) until it reaches its programmed level
(R2_DB[13:18]). If the PA is enabled/disabled by the
PA_ENABLE bit (R2_DB7), it ramps up and down. If it is
enabled/disabled by the Tx/Rx bit (R0_DB27), it ramps up
and turns hard off.
R-COSINE_ALPHA sets the roll-off factor (alpha) of the
raised cosine data filter to either 0.5 or 0.7. The alpha is set
to 0.5 by default, but the raised cosine filter bandwidth can
be increased to provide less aggressive data filtering by
using an alpha of 0.7.
NO RAMP
256 CODES/BIT
128 CODES/BIT
64 CODES/BIT
32 CODES/BIT
16 CODES/BIT
8 CODES/BIT
4 CODES/BIT
PA_RAMP RATE
PE1
0
1
PA_RAMP
S3
0
0
0
0
1
1
1
1
PA_ENABLED
OFF
ON
S2
0
0
1
1
0
0
1
1
S1
0
1
0
1
0
1
0
1
MODULATION_
MODULATION_SCHEME
2FSK
GAUSSIAN 2FSK
3FSK
4FSK
OVERSAMPLED 2FSK
RAISED COSINE 2FSK
RAISED COSINE 3FSK
RAISED COSINE 4FSK
SCHEME
ADDRESS
BITS
ADF7021-N