Datasheet

ADT7408
Rev. 0 | Page 3 of 24
SPECIFICATIONS
All specifications T
A
= −20°C to +125°C, V
DD
= 3.0 V to 3.6 V, unless otherwise noted.
Table 1.
Parameter Symbol Min Typ Max Unit Test Conditions/Comments
TEMPERATURE SENSOR AND ADC
Local Sensor Accuracy (C Grade) ±0.5 ±2.0 °C
75°C ≤ T
A
≤ 95°C, 3.0 V ≤ V
DD
≤ 3.6 V active range
±1 ±3.0 °C
40°C ≤ T
A
≤ 125°C, 3.0 V ≤ V
DD
≤ 3.6 V monitor range
±1 ±4.0 °C
−20°C ≤ T
A
≤ 125°C, 3.0 V ≤ V
DD
≤ 3.6 V
ADC Resolution 12 Bits
Temperature Resolution 0.0625 °C
Temperature Conversion Time 60 125 ms
Long Term Drift 0.081 °C Drift over 10 years, if part is operated at 55°C
EVENT# OUTPUT (OPEN DRAIN)
Output Low Voltage, V
OL
0.4 V I
OL
= 3 mA
Pin Capacitance 10 pF
High Output Leakage Current I
OH
0.1 1 µA EVENT# = 3.6 V
Rise Time
1
t
LH
30 ns
Fall Time
1
t
HL
30 ns
R
ON
Resistance (Low Output)
1
15 Ω Supply and temperature dependent
DIGITAL INPUTS
Input Current I
IH
, I
IL
−1 +1 µA V
IN
= 0 V to V
DD
Input Low Voltage V
IL
0.8 V
3.0 V ≤ V
DD
≤ 3.6 V
Input High Voltage V
IH
2.1 V
3.0 V ≤ V
DD
≤ 3.6 V
SCL, SDA Glitch Rejection
1
50 ns Input filtering suppresses noise spikes of less than 50 ns
Pin Capacitance
1
10 pF
DIGITAL OUTPUT (OPEN DRAIN)
Output Low Current I
OL
6 mA SDA forced to 0.6 V
Output Low Voltage V
OL
0.4 V
3.0 V ≤ V
DD
≤ 3.6 V at I
OPULL_UP
= 350 μA
Output High Voltage V
OH
2.1 V
Output Capacitance
1
C
OUT
10 pF
POWER REQUIREMENTS
Supply Voltage V
DD
3.0 3.3 3.6 V
Average Supply Current I
DD
240 500 µA
Supply Current I
DD_CONV
360 550 µA Device current while converting
Shutdown Mode at 3.3 V 3 20 µA
Average Power Dissipation P
D
790 µW V
DD
= 3.3 V, normal mode at 25°C
1
Guaranteed by design and characterization, not production tested.