CC2500-RTR1 datasheet(14/99 Pages) TI1

14 / 99 page

CC2500

SWRS040C

Page 14 of 89

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

0.654

Output voltage at 0

C

0.750

Output voltage at +40

C

0.848

Output voltage at +80

C

0.946

Temperature coefficient

2.43

mV/

C

Fitted from –20

C to +80C

Error in calculated

temperature, calibrated

-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

Current consumption

increase when enabled

0.3

Table 10: Analog Temperature Sensor Parameters

4.8

DC Characteristics

Tc = 25

C if nothing else stated.

Digital Inputs/Outputs

Min

Max

Unit

Condition/Note

Logic "0" input voltage

0.7

Logic "1" input voltage

VDD-0.7

VDD

Logic "0" output voltage

0.5

For up to 4 mA output current

Logic "1" output voltage

VDD-0.3

VDD

For up to 4 mA output current

Logic "0" input current

N/A

–50

Input equals 0 V

Logic "1" input current

N/A

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

From 0 V until reaching 1.8 V

Power off time

Minimum time between power-on and power-off

Table 12: Power-on Reset Requirements

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