Texas Instruments CC2500 User Manual

CC2500
S
WRS040
C
Page
9
of
89
4.2
RF Receive Section
Tc = 25

C, VDD = 3.0 V if nothing else stated. All measurement
results obtained
using the CC2500EM reference design
(
[4]
).
Parameter
Min
Typ
Max
Unit
Condition/Note
Digital channel filter
bandwidth
58
812
kHz
User programmable. The bandwidth limits are
proportional to crystal frequency (given values assume
a 26.0 MHz crystal).
2.4
kBaud
data rate,
sensitivity
optimized
,
MDMCFG2.DEM_DCFILT_OFF
=
0
(
2
-
FSK, 1% packet error rate, 20 bytes packet length, 203 kHz digital channel filter bandwidth)
Receiver sensitivity
–
104
dBm
The RX current consumption can be reduced by
approximately 1.7 mA by setting
M
DMCFG2.DEM_DCFILT_OFF
=
1
. The typical sensitivity
is then
-
102 dBm and the temperature range
is
from 0
o
C
to +85
o
C.
The sensitivity can be improved to typically
–
106 dBm
with
MDMCFG2.DEM_DCFILT_OFF
=
0
by programming
registers
TEST2
and
TEST1
(see page 82).
Th
e
temperature range is then
from 0
o
C to +85
o
C.
Saturation
–
13
dBm
Adjacent channel
rejection
23
dB
Desired channel 3 dB above the sensitivity limit. 250
kHz channel spacing
Alternate channel
rejection
31
dB
Desired channel 3 dB above the sensi
tivity limit. 250
kHz channel spacing
See
Figure
22
for plot of selectivity versus frequency
offset
Blocking
±10 MHz offset
±20 MHz offset
±50 MHz offset
64
70
71
dB
m
dB
m
dB
m
Wanted signal 3 dB above
sensitivity level.
Compliant with ETSI EN 300 440 class 2 receiver
requirements.
10
kBaud
data rate,
sensitivity
optimized,
MDMCFG2.DEM_DCFILT_OFF
=
0
(
2
-
FSK, 1% packet error rate, 20 bytes packet length, 232 kHz digital channel filter bandwidth)
Recei
ver sensitivity
–
99
dBm
The RX current consumption can be reduced by
approximately 1.7 mA by setting
MDMCFG2.DEM_DCFILT_OFF
=
1
. The typical sensitivity
is then
-
97 dBm
The sensitivity can be improved to typically
–
101 dBm
with
MDMCFG2.DEM_DCFILT_OFF
=
0
b
y programming
registers
TEST2
and
TEST1
(see page 82)
. The
temperature range is then from 0
o
C to +85
o
C.
Saturation
–
9
dBm
Adjacent channel
rejection
18
dB
Desired channel 3 dB above the sensitivity limit. 250
kHz channel spacing
Alternate channel
rejection
25
dB
Desired channel 3 dB above the sensitivity limit. 250
kHz channel spacing
See
Figure
23
for plot of selectivity versus frequency
offset
Blocking
±10 MHz offset
±20 MHz offset
±50 MHz off
set
59
65
66
dB
dB
dB
Wanted signal 3 dB above sensitivity level.
Compliant with ETSI EN 300 440 class 2 receiver
requirements.

Texas Instruments CC2500 Specifications

General

Brand	Texas Instruments
Model	CC2500
Category	Transceiver
Language	English