CC2500_11 Datasheet, PDF (14/96 Pages) Texas Instruments – Low-Cost Low-Power 2.4 GHz RF Transceiver

CC2500
4.7
Analog Temperature Sensor
The characteristics of the analog temperature sensor at 3.0 V supply voltage are listed in Table
10 below. Note that it is necessary to write 0xBF to the PTEST register to use the analog
temperature sensor in the IDLE state.
Parameter
Min Typ Max Unit Condition/Note
Output voltage at –40C
Output voltage at 0C
Output voltage at +40C
Output voltage at +80C
Temperature coefficient
Error in calculated
temperature, calibrated
Current consumption
increase when enabled
0.654
V
0.750
V
0.848
V
0.946
V
2.43
mV/C Fitted from –20C to +80C
-2 ^*
0
2 ^* C
From –20C to +80C when using 2.43 mV / C,
after 1-point calibration at room temperature
* _{The indicated minimum and maximum error with 1-}
point calibration is based on measured values for
typical process parameters
0.3
mA
Table 10: Analog Temperature Sensor Parameters
4.8
DC Characteristics
Tc = 25C if nothing else stated.
Digital Inputs/Outputs
Logic "0" input voltage
Logic "1" input voltage
Logic "0" output voltage
Logic "1" output voltage
Logic "0" input current
Logic "1" input current
Min
0
VDD-0.7
0
VDD-0.3
N/A
N/A
Max
0.7
VDD
0.5
VDD
–50
50
Unit Condition/Note
V
V
V For up to 4 mA output current
V For up to 4 mA output current
nA Input equals 0 V
nA Input equals VDD
Table 11: DC Characteristics
4.9
Power-On Reset
When the power supply complies with the requirements in Table 12 below, proper Power-On-
Reset functionality is guaranteed. Otherwise, the chip should be assumed to have unknown state
until transmitting an SRES strobe over the SPI interface. See Section 19.1 on page 39 for further
details.
Parameter
Min Typ Max Unit Condition/Note
Power ramp-up time
Power off time
1
5
ms From 0 V until reaching 1.8 V
ms Minimum time between power-on and power-off
Table 12: Power-on Reset Requirements
SWRS040C
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