ADF7021BCPZ Analog Devices Inc, ADF7021BCPZ Datasheet - Page 51

• Manufacturer Part Number: ADF7021BCPZ
• Description: IC, NARROW BAND TXRX, 80-950MHZ LFCSP-48
• Manufacturer: Analog Devices Inc

Specifications of ADF7021BCPZ

• Receiving Current: 26.4mA
• Transmitting Current: 32.3mA
• Data Rate: 32.8Kbps
• Frequency Range: 80MHz To 950MHz
• Rf Ic Case Style: LFCSP
• No. Of Pins: 48
• Supply Voltage Range: 2.3V To 3.6V
• Frequency: 80MHz ~ 650MHz, 862MHz ~ 940MHz
• Data Rate - Maximum: 33kbps
• Modulation Or Protocol: 2-FSK, 3-FSK, 4-FSK, MSK
• Applications: Keyless Entery, Pagers, WMTS
• Power - Output: -20dBm ~ 13dBm
• Sensitivity: -130dBm
• Voltage - Supply: 2.3 V ~ 6 V
• Current - Receiving: 20mA
• Current - Transmitting: 32.3mA @ 10dBm
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LFCSP
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 7mm
• Product Length (mm): 7mm
• Operating Supply Voltage (min): 2.3V
• Operating Supply Voltage (typ): 3V
• Operating Supply Voltage (max): 3.6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-ADF7021BZ5 - BOARD DAUGHTER MATCH UNPOPULATEDEVAL-ADF7021BZ2 - BOARD DAUGHTER 860/870MHZEVAL-ADF7021BIZ - BOARD DAUGHTER 421/440MHZEVAL-ADF7021BEZ - BOARD DAUGHTER 420/440MHZ
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant

REGISTER 4—DEMODULATOR SETUP REGISTER
To solve for DISCRIMINATOR_BW, use the following
equation:
where the maximum value = 660.
For 2FSK,
For 3FSK,
For 4FSK,
DW10
0
0
.
.
.
.
1
IFB2
0
0
1
1
DISCRIMINATOR_BW =
K
K
K
.
.
.
.
.
.
.
.
IFB1
0
1
0
1
IF_BW
=
=
=
Round
Round
Round
DW6
0
0
.
.
.
.
1
IF FILTER
BW
12.5kHz
18.75kHz
25kHz
INVALID
DW5
0
0
.
.
.
.
1
4
FSK
⎛
⎜
⎜
⎝
⎛
⎜
⎜
⎝
100
100
2
DW4
0
0
.
.
.
.
1
×
⎛
⎜
⎜
⎝
100
f
4
×
×
f
DEV
DEV
×
10
10
DW3
0
0
.
.
.
.
1
×
f
3
3
DEV
10
POST_DEMOD_BW
⎞
⎟
⎟
⎠
3
DW2
0
1
.
.
.
.
1
⎞
⎟
⎟
⎠
TD10
0
0
.
.
.
.
1
⎞
⎟
⎟
⎠
DEMOD
DW1
1
0
.
.
.
.
1
.
.
.
.
.
.
.
.
400 ×
POST DEMOD
BW
1
2
.
.
.
.
1023
TD6
0
0
.
.
.
.
0
CLK
10
TD5
0
0
.
.
.
.
1
3
Figure 66. Register 4—Demodulator Setup Register Map
× K
TD4
0
0
.
.
.
.
0
TD3
0
0
.
.
.
.
1
TD2
0
1
.
.
.
.
0
Rev. A | Page 51 of 64
TD1
1
0
.
.
.
.
0
DISCRIMINATOR_BW
RI2
0
0
1
1
CORRELATOR
DISCRIM BW
1
2
.
.
.
.
660
RI1
0
1
0
1
where:
Round is rounded to the nearest integer.
Round
31, 28, 27, 24, 23, 20, 19, 16, 15, 12, 11, 8, 7, 4, 3.
f
the frequency deviation used for the ±1 symbols (that is, the
inner frequency deviations).
Rx_INVERT (DB[8:9]) and DOT_PRODUCT (DB7) need to be
set as outlined in Table 17 and Table 18.
where the
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
INVERT
NORMAL
INVERT CLK
INVERT DATA
INVERT CLK/DATA
is the transmit frequency deviation in Hz. For 4FSK, f
POST_DEMOD
4FSK
is rounded to the nearest of the following integers: 32,
cutoff frequency (f
DP1
0
1
INVERT
DS3
0
0
0
0
1
1
1
1
Rx_
_BW
PRODUCT
CROSS PRODUCT
DOT PRODUCT
DS2
0
0
1
1
0
0
1
1
DS1
0
1
0
1
0
1
0
1
=
2
CUTOFF
DEMOD
11
DEMOD_
SCHEME
DEMODULATOR SCHEME
2FSK LINEAR DEMODULATOR
2FSK CORRELATOR DEMODULATOR
3FSK DEMOD
4FSK DEMOD
RESERVED
RESERVED
RESERVED
RESERVED
×
π
) of the post demodulator
×
f
CUTOFF
CLK
ADDRESS
BITS
ADF7021
DEV
is