CC2541-Q1_15 Datasheet, PDF (11/35 Pages) Texas Instruments – CC2541-Q1 SimpleLink Bluetooth Low Energy Wireless MCU for Automotive

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CC2541-Q1
SWRS128 – JUNE 2014
4.8 RF Transmit Section
Measured on Texas Instruments CC2541-Q1 EM reference design with T_A = 25°C, VDD = 3 V and f_c = 2440 MHz
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
Output power
Delivered to a single-ended 50-Ω load through a balun using
maximum recommended output power setting
Delivered to a single-ended 50-Ω load through a balun using
minimum recommended output power setting
0
dBm
–20
Programmable output power Delivered to a single-ended 50-Ω load through a balun using
range
minimum recommended output power setting
20
dB
f < 1 GHz
–52
dBm
Spurious emission conducted f > 1 GHz
–48
dBm
measurement
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)
Optimum load impedance
Differential impedance as seen from the RF port (RF_P and RF_N)
toward the antenna
70 +j30
Ω
Designs with antenna connectors that require conducted ETSI compliance at 64 MHz should insert an LC
resonator in front of the antenna connector. Use a 1.6-nH inductor in parallel with a 1.8-pF capacitor. Connect
both from the signal trace to a good RF ground.
4.9 32-MHz Crystal Oscillator
Measured on Texas Instruments CC2541-Q1 EM reference design with T_A = 25°C and VDD = 3 V
PARAMETER
TEST CONDITIONS
MIN
Crystal frequency
Crystal frequency accuracy
requirement ⁽¹⁾
–40
ESR Equivalent series resistance
6
C₀
Crystal shunt capacitance
1
C_L
Crystal load capacitance
10
Start-up time
Power-down guard time
The crystal oscillator must be in power down for a guard
time before it is used again. This requirement is valid for
all modes of operation. The need for power-down guard
3
time can vary with crystal type and load.
(1) Including aging and temperature dependency, as specified by [1]
TYP MAX UNIT
32
MHz
40 ppm
60 Ω
7 pF
16 pF
0.25
ms
ms
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Specifications
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