CC2545_15 Datasheet, PDF (6/31 Pages) Texas Instruments – System-on-Chip for 2.4-GHz RF Applications

CC2545
SWRS106B – JUNE 2012 – REVISED FEBRUARY 2013
www.ti.com
RF TRANSMIT SECTION
Measured on Texas Instruments CC2545EM reference design with T_A = 25°C, VDD = 3.0 V, and f_C = 2440 MHz, unless
otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
Output power, maximum setting
Delivered to a single-ended 50-Ω load through a balun using
maximum recommended output power setting.
5
dBm
Output power, minimum setting
Delivered to a single-ended 50-Ω load through a balun using
minimum recommended output power setting.
–20
dBm
Programmable output power range Delivered to a single-ended 50-Ω load through a balun.
25
dB
f < 1 GHz
–46
dBm
Spurious emission in TX.
Conducted measurement
f > 1 GHz
–44
dBm
Suitable for Systems Targeting Compliance With Worldwide Radio Frequency Regulations: ETSI EN
300 328 and EN 300 440 Class 2 (Europe), FCC CFR47 Part 15 (US), and ARIB STD-T66 (Japan)
Use a simple LC filter (1.6nH and 1.8pF in parallel to ground) to pass ETSI conducted requirements below 1GHz
in restricted bands. For radiated measurements low antenna gain for these frequencies (depending on antenna
design) can achieve the same attenuation of these low frequency components (see EM reference design).
32-MHz CRYSTAL OSCILLATOR
Measured on Texas Instruments CC2545EM reference design with T_A = 25°C, VDD = 3.0 V, unless otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
Crystal frequency
32
MHz
Crystal frequency accuracy
requirement
250 kbps and 500 kbps data rates
1 Mbps data rate
2 Mbps data rate
–30
30
–40
40
ppm
–60
60
Equivalent series resistance
6
60
Ω
Crystal shunt capacitance
1
7
pF
Crystal load capacitance
10
16
pF
Start-up time
0.25
ms
The crystal oscillator must be in power down for a guard time
Power-down guard time
before it is used again. This requirement is valid for all modes of
operation. The need for power-down guard time can vary with
3
ms
crystal type and load.
32.768-kHz CRYSTAL OSCILLATOR
Measured on Texas Instruments CC2545EM reference design with T_A = 25°C, VDD = 3.0 V, unless otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
Crystal frequency
32.768
kHz
Crystal frequency accuracy
requirement ⁽¹⁾
-100
+100
ppm
Equivalent series resistance
40
130
Ω
Crystal shunt capacitance
0.9
2
pF
Crystal load capacitance
12
16
pF
Start-up time
0.4
s
(1) Crystal frequency accuracy requirement is highly dependent on application. Higher accuracy enables more accurate duty-cycling which
in turn will reduce current consumption. The chip can handle much less accurate crystals.
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