CC2540T_15 Datasheet, PDF (13/37 Pages) Texas Instruments – SimpleLink CC2540T 2.4-GHz Bluetooth Low Energy Wireless MCU

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CC2540T
SWRS172 – JULY 2014
4.13 16-MHz RC Oscillator
Measured on Texas Instruments CC2540 EM reference design with T_A = 25°C and VDD = 3 V
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
Frequency ⁽¹⁾
16
MHz
Uncalibrated frequency accuracy
±18%
Calibrated frequency accuracy
±0.6%
Start-up time
Initial calibration time⁽²⁾
10
μs
50
μs
(1) The calibrated 16-MHz RC oscillator frequency is the 32-MHz XTAL frequency divided by 2.
(2) When the 16-MHz RC oscillator is enabled, it is calibrated when a switch from the 16-MHz RC oscillator to the 32-MHz crystal oscillator
is performed while SLEEPCMD.OSC_PD is set to 0.
4.14 RSSI Characteristics
Measured on Texas Instruments CC2540 EM reference design with T_A = 25°C and VDD = 3 V
PARAMETER
TEST CONDITIONS
MIN
TYP
Useful RSSI range⁽¹⁾
Absolute uncalibrated RSSI accuracy⁽¹⁾
High-gain mode
Standard mode
High-gain mode
–99 to –44
–90 to –35
±4
Step size (LSB value)
1
(1) Assuming CC2540 EM reference design. Other RF designs give an offset from the reported value.
MAX
UNIT
dBm
dB
dB
4.15 Frequency Synthesizer Characteristics
Measured on Texas Instruments CC2540 EM reference design with T_A = 25°C, VDD = 3 V and f_c = 2440 MHz
PARAMETER
TEST CONDITIONS
MIN TYP MAX
Phase noise, unmodulated
carrier
At ±1-MHz offset from carrier
At ±3-MHz offset from carrier
At ±5-MHz offset from carrier
–109
–112
–119
UNIT
dBc/Hz
4.16 Analog Temperature Sensor
Measured on Texas Instruments CC2540 EM reference design with T_A = 25°C and VDD = 3 V
PARAMETER
TEST CONDITIONS
MIN
Output
Temperature coefficient
Voltage coefficient
Initial accuracy without calibration
Measured using integrated ADC, internal band-gap voltage
reference, and maximum resolution
Accuracy using 1-point calibration
Current consumption when enabled
TYP
1480
4.5
1
±10
±5
0.5
MAX
UNIT
12-bit
/ 1°C
/ 0.1 V
°C
°C
mA
4.17 Comparator Characteristics
T_A = 25°C, VDD = 3 V. All measurement results are obtained using the CC2540T reference designs, post-calibration.
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
Common-mode maximum voltage
VDD
V
Common-mode minimum voltage
–0.3
Input offset voltage
1
mV
Offset vs temperature
16
µV/°C
Offset vs operating voltage
4
mV/V
Supply current
230
nA
Hysteresis
0.15
mV
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Specifications
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