CC2550 Datasheet, PDF (28/50 Pages) Texas Instruments – Single Chip Low Cost Low Power RF-Transmitter

CC2550
PATABLE(7)[7:0]
PATABLE(6)[7:0]
PATABLE(5)[7:0]
PATABLE(4)[7:0]
PATABLE(3)[7:0]
PATABLE(2)[7:0]
PATABLE(1)[7:0]
PATABLE(0)[7:0]
The PA uses
this setting.
Settings 0 to
PA_POWER are
used during ramp-
up at start of
transmission and
ramp-down at end
of transmission,
and for ASK/OOK
modulation.
Index into PATABLE(7:0)
The SmartRF^®
Studio software
e.g 6
should be used to
get optimum
PA_POWER[2:0] ^{PATABLE settings}
in FREND0 register
for various output
powers.
Figure 14: PA_POWER and PATABLE
The power ramping at the start and at the end
of a packet can be turned off by setting
FREND0.PA_POWER to zero and then
program the desired output power to index
zero in the PATABLE.
Table 20 contains recommended PATABLE
settings for various output levels and
frequency bands. See section 17.5 on page 15
for PATABLE programming details.
Output power
typical, +25°C, 3.0V
[dBm]
(–55 or less)
–30
–28
–26
–24
–22
–20
–18
–16
–14
–12
–10
–8
–6
–4
–2
0
1
PATABLE
value
0x00
0x44
0x43
0x52
0x82
0x45
0xC1
0xC8
0x85
0x67
0xC6
0x97
0xD5
0x7F
0xAA
0xBF
0xFB
0xFF
Current consumption,
typical [mA]
10.1
11.2
11.6
11.9
11.8
11.6
12.2
13.6
12.1
14.3
12.8
13.9
14.9
16.4
18.1
19.8
22.8
23.1
Table 20: Optimum PATABLE settings for various output power levels (subject to changes)
TBD
Default power setting
Output power,
typ [dBm]
0xC6
-12.2
Current
consumption,
typ. [mA]
13.0
Table 21: Output power and current consumption for default PATABLE setting
Preliminary Data Sheet (rev. 1.1) SWRS039
Page 28 of 51