ADT7302ARMZ datasheet(3/16 Pages) AD

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ADT7302

Rev. 0 | Page 3 of 16

SPECIFICATIONS

TA = TMIN to TMAX, VDD = 2.7 V to 5.25 V, unless otherwise noted. All specifications 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 (±5%).

Accuracy

±1

±2

°C

TA = 0°C to 70°C.

±2.5

°C

TA = −20°C to +85°C.

±3

°C

TA = −40°C to +125°C.

Temperature Resolution

0.03125

°C

Autoconversion Update Rate, tR

sec

Temperature measurement every 1 second.

Temperature Conversion Time

800

μs

Thermal Time Constant1

sec

SUPPLIES

Supply Voltage

2.7

5.25

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, TA = 0°C to 70°C.

0.4

μA

VDD = 5 V, TA = 0°C to 70°C.

μA

VDD = 2.7 V to 5.25 V, TA = −40°C to 125°C.

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 The thermal time constant is the time it takes for a temperature delta to change to 63.2% of its final value. For example, if the ADT7302 experiences a thermal shock

from 0°C to 100°C, it typically takes 2 seconds 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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