Datasheet
ADT7302
Rev. B | Page 3 of 16
SPECIFICATIONS
T
A
= T
MIN
to T
MAX
, V
DD
= 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 V
DD
= 3.3 V (±10%) and 5 V (±5%)
Accuracy ±1 ±2 °C T
A
= 0°C to 70°C
±2.5 °C T
A
= −20°C to +85°C
±3 °C T
A
= −40°C to +125°C
Temperature Resolution 0.03125 °C
Autoconversion Update Rate, t
R
1.5 sec Temperature measurement every 1.5 second
Temperature Conversion Time 1.2 ms
Thermal Time Constant
1
2 sec
SUPPLIES
Supply Voltage 2.7 5.25 V For specified performance
Supply Current
Normal Mode 1.6 2.2 mA V
DD
= 3.3 V, powered up and converting
190 300 µA V
DD
= 3.3 V, powered up and not converting
1.6 2.2 mA V
DD
= 5 V, powered up and converting
280 400 µA V
DD
= 5 V, powered up and not converting
Shutdown Mode 0.2 1 µA V
DD
= 3.3 V, T
A
= 0°C to 70°C
0.4 2 µA V
DD
= 5 V, T
A
= 0°C to 70°C
20 µA V
DD
= 2.7 V to 5.25 V, T
A
= −40°C to +125°C
Power Dissipation
Normal Mode (Average) 631 µW V
DD
= 3.3 V, autoconversion update, t
R
1.41 mW V
DD
= 5 V, autoconversion update, t
R
Shutdown Mode (Average)
2
1 SPS 4.88 µW V
DD
= 3.3 V
7.4 µW V
DD
= 5 V
10 SPS 42.9 µW V
DD
= 3.3 V
65 µW V
DD
= 5 V
100 SPS 423 µW V
DD
= 3.3 V
641 µW V
DD
= 5 V
DIGITAL INPUT
3
Input High Voltage, V
IH
2.5 V
Input Low Voltage, V
IL
0.8 V
Input Current, I
IN
±1 µA V
IN
= 0 V to V
DD
Input Capacitance, C
IN
10 pF All digital inputs
DIGITAL OUTPUT
3
Output High Voltage, V
OH
V
DD
− 0.3 V I
SOURCE
= I
SINK
= 200 µA
Output Low Voltage, V
OL
0.4 V I
OL
= 200 µA
Output Capacitance, C
OUT
50 pF
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.