CC2531F128, CC2531F256
www.ti.com
SWRS086A –SEPTEMBER 2009–REVISED JUNE 2010
RF TRANSMIT SECTION
Measured on Texas Instruments CC2530 EM reference design with T
A
= 25°C, V
DD
= 3 V and f
c
= 2440 MHz, unless
otherwise noted.
Boldface limits apply over the entire operating range, T
A
= –40°C to 125°C, V
DD
= 2 V to 3.6 V, and f
c
= 2394 MHz to 2507
MHz.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Delivered to a single-ended 50-Ω load through a balun using
0 4.5 8
maximum-recommended output-power setting
Nominal output power dBm
[1] requires minimum –3 dBm –8 10
Programmable output power 32 dB
range
Spurious emissions Max recommended output power setting
(1)
Measured according to stated regulations.
Only largest spurious emission 25 MHz–1000 MHz (outside restricted bands) –60
stated within each band.
25 MHz–2400 MHz (within FCC restricted bands) –60
25 MHz–1000 MHz (within ETSI restricted bands) –60
1800–1900 MHz (ETSI restricted band) –57
5150–5300 MHz (ETSI restricted band)
–55
dBm
At 2 × f
c
and 3 × f
c
(FCC restricted band)
–42
At 2 × f
c
and 3 × f
c
(ETSI EN 300-440 and EN 300-328)
(2)
–31
1 GHz–12.75 GHz (outside restricted bands)
–53
At 2483.5 MHz and above (FCC restricted band)
f
c
= 2480 MHz
(3)
–42
Measured as defined by [1] using maximum-recommended
output-power setting
Error vector magnitude (EVM) 2%
[1] requires maximum 35%.
Differential impedance as seen from the RF port (RF_P and RF_N)
Optimum load impedance 69 + j29 Ω
towards the antenna
(1) Texas Instruments CC2530 EM reference design is suitable for systems targeting compliance with EN 300 328, EN 300 440, FCC
CFR47 Part 15, and ARIB STD-T-66.
(2) Margins for passing conducted requirements at the third harmonic can be improved by using a simple band-pass filter connected
between matching network and RF connector (1.8 pF in parallel with 1.6 nH); this filter must be connected to a good RF ground.
(3) Margins for passing FCC requirements at 2483.5 MHz and above when transmitting at 2480 MHz can be improved by using a lower
output-power setting or having less than 100% duty cycle.
Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback 7
Product Folder Link(s): CC2531F128 CC2531F256
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