ADT7302ARMZ datasheet(4/17 Pages) AD

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ADT7302

Rev. B | Page 3 of 16

SPECIFICATIONS

TA = TMIN to TMAX, VDD = 2.7 V to 5.25 V, unless otherwise noted. All specifications are for −40°C to +125°C, unless otherwise stated.

Table 1.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

TEMPERATURE SENSOR AND ADC

DD = 3.3 V (±10%) and 5 V (±5%)

Accuracy

±1

±2

°C

A = 0°C to 70°C

±2.5

°C

A = −20°C to +85°C

±3

°C

A = −40°C to +125°C

Temperature Resolution

0.03125

°C

Autoconversion Update Rate, t

1.5

sec

Temperature measurement every 1.5 second

Temperature Conversion Time

1.2

Thermal Time Constant1

sec

SUPPLIES

Supply Voltage

2.7

5.25

For specified performance

Supply Current

Normal Mode

1.6

2.2

DD = 3.3 V, powered up and converting

190

300

µA

DD = 3.3 V, powered up and not converting

1.6

2.2

DD = 5 V, powered up and converting

280

400

µA

DD = 5 V, powered up and not converting

Shutdown Mode

0.2

µA

DD = 3.3 V, TA = 0°C to 70°C

0.4

µA

DD = 5 V, TA = 0°C to 70°C

µA

DD = 2.7 V to 5.25 V, TA = −40°C to +125°C

Power Dissipation

Normal Mode (Average)

631

µW

DD = 3.3 V, autoconversion update, tR

1.41

DD = 5 V, autoconversion update, tR

Shutdown Mode (Average)2

1 SPS

4.88

µW

DD = 3.3 V

7.4

µW

DD = 5 V

10 SPS

42.9

µW

DD = 3.3 V

µW

DD = 5 V

100 SPS

423

µW

DD = 3.3 V

641

µW

DD = 5 V

DIGITAL INPUT3

Input High Voltage, V

2.5

Input Low Voltage, V

0.8

Input Current, I

±1

µA

IN = 0 V to VDD

Input Capacitance, C

All digital inputs

DIGITAL OUTPUT3

Output High Voltage, V

DD − 0.3 V

SOURCE = ISINK = 200 µA

Output Low Voltage, V

0.4

OL = 200 µA

Output Capacitance, C

OUT

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. When 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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