CC2500 Datasheet, PDF (12/76 Pages) Texas Instruments – Single Chip Low Cost Low Power RF Transceiver

CC2500
4.7 Analog Temperature Sensor
The characteristics of the analog temperature sensor 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
Output voltage at +120°C
Temperature coefficient
Error in calculated
temperature, calibrated
Current consumption
increase when enabled
0.660
0.755
0.859
0.958
1.056
2.54
0
0.3
V
V
V
V
V
mV/°C Fitted from –20°C to +80°C
°C From –20°C to +80°C when using 2.54 mV / °C,
after 1-point calibration at room temperature
mA
Table 10: Analog Temperature Sensor Parameters
4.8 DC Characteristics
The DC Characteristics of CC2500 are listed in Table 11 below.
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
NA
NA
Max
0.7
VDD
0.5
VDD
–1
1
Unit
V
V
V
V
µA
µA
Condition
For up to 4 mA output current
For up to 4 mA output current
Input equals 0V
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 35 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
Preliminary Data Sheet (rev.1.1.) SWRS040
Page 12 of 77