EVAL-ADF7021-NDBZ5 Analog Devices Inc, EVAL-ADF7021-NDBZ5 Datasheet - Page 53

• 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 4—DEMODULATOR SETUP REGISTER
•
•
•
•
DW10
0
0
.
.
.
.
1
IFB2
0
0
1
1
To solve for DISCRIMINATOR_BW, use the following
equation:
where the maximum value = 660.
For 2FSK,
For 3FSK,
For 4FSK,
.
.
.
.
.
.
.
.
IFB1
0
1
0
1
DISCRIMINATOR_BW =
K
K
K
DW6
0
0
.
.
.
.
1
=
=
=
IF_FILTER _
BW
9 kHz
13.5 kHz
18.5 kHz
INVALID
Round
Round
Round
DW5
0
0
.
.
.
.
1
4
DW4
0
0
.
.
.
.
1
FSK
⎛
⎜
⎜
⎝
⎛
⎜
⎜
⎝
100
100
2
×
⎛
⎜
⎜
⎝
DW3
0
0
.
.
.
.
1
100
f
×
4
×
f
DEV
DEV
×
POST_DEMOD_BW
10
10
×
f
DW2
0
1
.
.
.
.
1
3
DEV
3
10
TD10
0
0
.
.
.
.
1
⎞
⎟
⎟
⎠
3
⎞
⎟
⎟
⎠
⎞
⎟
⎟
⎠
DW1
1
0
.
.
.
.
1
.
.
.
.
.
.
.
.
DEMOD
POST_DEMOD_
BW
1
2
.
.
.
.
1023
TD6
0
0
.
.
.
.
0
400 ×
TD5
0
0
.
.
.
.
1
CLK
10
Figure 67. Register 4—Demodulator Setup Register Map
3
TD4
0
0
.
.
.
.
0
× K
TD3
0
0
.
.
.
.
1
TD2
0
1
.
.
.
.
0
Rev. 0 | Page 53 of 64
TD1
1
0
.
.
.
.
0
DISCRIMINATOR_BW
RI2
0
0
1
1
DISCRIMINATOR_BW
1
2
.
.
.
.
660
RI1
0
1
0
1
Rx_INVERT
NORMAL
INVERT CLK
INVERT DATA
INVERT CLK/DATA
•
where:
Round is rounded to the nearest integer.
Round
32, 31, 28, 27, 24, 23, 20, 19, 16, 15, 12, 11, 8, 7, 4, 3.
f
f
(that is, the inner frequency deviations).
Rx_INVERT (R4_DB[8:9]) and DOT_PRODUCT
(R4_DB7) need to be set as outlined in Table 17 and
Table 18.
where the
ulator filter should typically be 0.75 × the data rate in
2FSK. In 3FSK, it should be set equal to the data rate, while
in 4FSK, it should be set equal to 1.6 × symbol rate.
DEV
DEV
POST_DEMOD
is the transmit frequency deviation in Hz. For 4FSK,
is the frequency deviation used for the ±1 symbols
4FSK
DP1
0
1
is rounded to the nearest of the following integers:
cutoff frequency (f
INVERT
DS3
0
0
0
0
1
1
1
1
Rx_
DOT_PRODUCT
CROSS_PRODUCT
DOT_PRODUCTD
DS2
0
0
1
1
0
0
1
1
_BW
DS1
0
1
0
1
0
1
0
1
=
DEMOD_
SCHEME
DEMOD_SCHEME
2FSK LINEAR DEMODULATOR
2FSK CORRELATOR DEMODULATOR
3FSK DEMOD
4FSK DEMOD
RESERVED
RESERVED
RESERVED
RESERVED
2
DEMOD
11
CUTOFF
×
π
×
) of the post demod-
f
CUTOFF
CLK
ADDRESS
BITS
ADF7021-N