ADT7302ARMZ datasheet(3/14 Pages) AD

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Preliminary Technical Data

ADT7302

Rev. PrE | Page 3 of 14

SPECIFICATIONS

TA = TMIN to TMAX, VDD = 2.7 V to 5.5 V, unless otherwise noted. All specifications apply for –40°C to +125°C, unless otherwise stated

Table 1.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

TEMPERATURE SENSOR AND ADC

VDD = +3.3 V (±10%) and 5 V (±10%)

Accuracy

TBD

±2

°C

TA = 0°C to 70°C.

TBD

±2.5

°C

TA = −20°C to +85°C.

TBD

±3

°C

TA = −40°C to +125°C.

Temperature Resolution

0.03125

°C

Auto Conversion Update Rate, tR

sec

Temperature measurement every 1 second

Temperature Conversion Time

Thermal Time Constant1

sec

SUPPLIES

Supply Voltage

2.7

5.5

For Specified performance.

Supply Current

Normal Mode

1.6

2.2

VDD = 3.3 V. Powered up and converting

190

300

µA

VDD = 3.3 V. Powered up and not converting

1.6

2.2

VDD = 5 V. Powered up and converting

280

400

µA

VDD = 5 V. Powered up and not converting

Shutdown Mode

0.2

µA

VDD = 3.3 V.

0.2

µA

VDD = 5 V.

Power Dissipation

Normal Mode (Average)

631

µW

VDD = 3.3 V. Auto conversion update, tR.

1.41

VDD = 5 V. Auto conversion update, tR.

Shutdown Mode (Average)2

1 SPS

4.88

µW

VDD = 3.3 V

7.4

µW

VDD = 5 V

10 SPS

42.9

µW

VDD = 3.3 V

µW

VDD = 5 V

100 SPS

423

µW

VDD = 3.3 V

641

µW

VDD = 5 V

DIGITAL INPUT3

Input High Voltage, VIH

2.5

Input Low Voltage, VIL

0.8

Input Current, IIN

±1

µA

VIN = 0 V to VDD

Input Capacitance, CIN

All digital inputs

DIGITAL OUTPUT3

Output High Voltage, VOH

VDD − 0.3 V

ISOURCE = ISINK = 200 µA

Output Low Voltage, VOL

0.4

IOL = 200 µA

Output Capacitance, COUT

1 Thermal Time Constant is the time it takes for a starting temperature difference to change to 36.8% of it’s starting value. For example if the ADT7302 experienced a

thermal shock from 0°C to 100°C, it would take typically 2 secs for the ADT7302 to reach 63.2°C.

2 The ADT7302 is taken out of shutdown mode and a temperature conversion is immediately performed after this write operation. Once the temperature conversion is

complete, the ADT7302 is put back into shutdown mode.

3 Guaranteed by design and characterization, not production tested.

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