CC2544_15 Datasheet, PDF (6/29 Pages) Texas Instruments – System-on-Chip for 2.4-GHz USB Applications

CC2544
SWRS103D – JUNE 2011 – REVISED MAY 2012
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RF RECEIVE SECTION (continued)
Measured on Texas Instruments CC2544EM reference design with T_A = 25°C, VDD = 3.3 V, VBUS tied to 5 V, and f_C = 2440
MHz, unless otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
250 kbps, GFSK, 160-kHz Deviation, 0.1% BER
Receiver sensitivity
Saturation ⁽⁷⁾
-95
dBm
5
dBm
Co-channel rejection
Wanted signal at –67 dBm
-9
dB
±2-MHz offset, wanted signal –67 dBm
31
±4-MHz offset, wanted signal –67 dBm
In-band blocking rejection
±6-MHz offset, wanted signal –67 dBm
31
dB
55
>12-MHz offset, wanted signal –67 dBm
53
Frequency error
tolerance ⁽⁸⁾
Including both initial tolerance and drift. Sensitivity better
than –70 dBm. 250-byte payload
–150
150
kHz
Symbol-rate error
tolerance ⁽⁹⁾
Sensitivity better than –70 dBm. 250-byte payload
–60
60
ppm
250 kbps, MSK, 0.1% BER
Receiver sensitivity
Saturation ⁽⁷⁾
–95
dBm
5
dBm
Co-channel rejection
Wanted signal at –67 dBm
–5
dB
±2-MHz offset, wanted signal –67 dBm
31
±4-MHz offset, wanted signal –67 dBm
In-band blocking rejection
±6-MHz offset, wanted signal –67 dBm
31
dB
45
>12-MHz offset, wanted signal –67 dBm
54
Frequency error
tolerance ⁽⁸⁾
Including both initial tolerance and drift. Sensitivity better
than –70 dBm. 250-byte payload
–150
150
kHz
Symbol-rate error
tolerance ⁽⁹⁾
Sensitivity better than –70 dBm. 250-byte payload
–60
60
ppm
ALL RATES/FORMATS
Spurious emission in RX.
Conducted measurement
f < 1 GHz
–67
dBm
Spurious emission in RX.
Conducted measurement
f > 1 GHz
–57
dBm
(7) AGC enabled
(8) Difference between center frequency of the received RF signal and local oscillator frequency
(9) Difference between incoming symbol rate and the internally generated symbol rate
RF TRANSMIT SECTION
Measured on Texas Instruments CC2544EM reference design with T_A = 25°C, VDD = 3.3 V, VBUS tied to 5 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.
4
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.
24
dB
Spurious emission in TX.
Conducted measurement.
f < 1 GHz
–46
dBm
Spurious emission in TX.
Conducted measurement.
f > 1 GHz
–44
dBm
Optimum load impedance
Differential impedance as seen from the RF port (RF_P
and RF_N) toward the antenna
70 + j30
Ω
6
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