CC2550-RTY1 datasheet(8/62 Pages) TI2

8 / 62 page

CC2550

SWRS039B

Page 8 of 58

4.5

Analog Temperature Sensor

The characteristics of the analog temperature sensor at 3.0 V supply voltage are listed in Table 8

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

0.660

Output voltage at 0

°C

0.755

Output voltage at +40

°C

0.859

Output voltage at +80

°C

0.958

Temperature coefficient

2.54

mV/

°C

Fitted from –20

°C to +80°C

Error in calculated

temperature, calibrated

-2

°C

From –20

°C to +80°C when using 2.54 mV / °C,

after 1-point calibration at room temperature

* The indicated minimum and maximum error with 1-

point calibration is based on simulated values for

typical process parameters

Current consumption

increase when enabled

0.3

Table 8: Analog Temperature Sensor Parameters

4.6

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

-50

Input equals 0 V

Logic "1" input current

Input equals VDD

Table 9: DC Characteristics

4.7

Power-On Reset

When the power supply complies with the requirements in Table 10 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 16.1 on page 25 for further

details.

Parameter

Min

Typ

Max

Unit

Condition/Note

Power-up ramp-up time

From 0 V until reaching 1.8 V

Power off time

Minimum time between power off and power-on.

Table 10: Power-on Reset Requirements

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