CC2540T Datasheet, PDF (12/37 Pages) Texas Instruments – Extended Industrial Temperature Bluetooth Smart Wireless MCU

CC2540T
SWRS172A – JULY 2014 – REVISED NOVEMBER 2015
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4.13 16-MHz RC Oscillator
Measured on the TI CC2540 EM reference design with T_A = 25°C and V_DD = 3 V.
PARAMETER
TEST CONDITIONS
Frequency ⁽¹⁾
MIN TYP MAX UNIT
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 the TI CC2540 EM reference design with T_A = 25°C and V_DD = 3 V.
PARAMETER
TEST CONDITIONS
MIN
Useful RSSI range⁽¹⁾
Absolute uncalibrated RSSI accuracy⁽¹⁾
High-gain mode
Standard mode
High-gain mode
Step size (LSB value)
(1) Assuming CC2540 EM reference design. Other RF designs give an offset from the reported value.
TYP
–99 to –44
–90 to –35
±4
1
MAX
UNIT
dBm
dB
dB
4.15 Frequency Synthesizer Characteristics
Measured on the TI CC2540 EM reference design with T_A = 25°C, V_DD = 3 V and f_c = 2440 MHz.
PARAMETER
TEST CONDITIONS
MIN
Phase noise, unmodulated
carrier
At ±1-MHz offset from carrier
At ±3-MHz offset from carrier
At ±5-MHz offset from carrier
TYP
–109
–112
–119
MAX UNIT
dBc/Hz
4.16 Analog Temperature Sensor
Measured on the TI CC2540 EM reference design with T_A = 25°C and V_DD = 3 V.
PARAMETER
TEST CONDITIONS
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
MIN TYP MAX UNIT
1480
12-bit
4.5
/ 1°C
1
/ 0.1 V
±10
°C
±5
°C
0.5
mA
4.17 Comparator Characteristics
T_A = 25°C, V_DD = 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 versus temperature
16
µV/°C
Offset versus operating voltage
4
mV/V
Supply current
230
nA
Hysteresis
0.15
mV
12
Specifications
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