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ADT7481ARMZ-1R7 Dual Channel Temperature Sensor and Overtemperature Alarm
Prototype PCB
Part No.:   ADT7481ARMZ-1R7
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Description:   Dual Channel Temperature Sensor and Overtemperature Alarm
File Size :   253 K    
Page : 20 Pages
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Maker   ONSEMI [ ON SEMICONDUCTOR ]http://www.onsemi.com
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ADT7481
ELECTRICAL CHARACTERISTICS
(T
A
=
−40°C
to +120°C, V
DD
= 3.0 V to 3.6 V, unless otherwise noted)
Parameter
Power Supply
Supply Voltage, V
DD
Average Operating Supply Current, I
DD
Undervoltage Lockout Threshold
Power−On−Reset Threshold
Temperature−To−Digital Converter
Local Sensor Accuracy (Note 2)
0°C
T
A
+70°C
0°C
T
A
+85°C
−40
T
A
+100°C
1.0
0°C
T
A
+70°C,
−55°C
T
D
(Note 3)
+150°C
0°C
T
A
+85°C,
−55°C
T
D
(Note 3)
+150°C
−40°C
T
A
+100°C,
−55°C
T
D
(Note 3)
+150°C
0.25
High level (Note 4)
Low level (Note 4)
Conversion Time
From stop bit to conversion complete (both channels)
one−shot mode with averaging switched on
One−shot mode with averaging off (conversion
rate = 16, 32, or 64 conversions per second)
Open−Drain Digital Outputs (THERM, ALERT/THERM2)
Output Low Voltage, V
OL
High Level Output Leakage Current, I
OH
SMBus Interface
(Notes 4 and 5)
Logic Input High Voltage, V
IH
SCLK, SDATA
Logic Input Low Voltage, V
IL
SCLK, SDATA
Hysteresis
SDA Output Low Voltage, V
OL
Logic Input Current, I
IH
, I
IL
SMBus Input Capacitance,
SCLK, SDATA
SMBus Clock Frequency
SMBus Timeout (Note 6)
SCLK Falling Edge to SDATA Valid Time
1.
2.
3.
4.
5.
6.
User programmable
Master clocking in data
25
I
OUT
=
−6.0
mA
−1.0
5.0
400
32
1.0
500
0.4
+1.0
2.1
0.8
V
V
mV
V
mA
pF
kHz
ms
ms
I
OUT
=
−6.0
mA
V
OUT
= V
DD
0.1
0.4
1.0
V
mA
233
14
73
11
94
14
±1
±1.5
±2.5
±1
±1.5
±2.5
°C
0.0625 Conversions/Sec Rate (Note 1)
Standby mode
V
DD
input, disables ADC, rising edge
1.0
3.0
3.30
3.0
5.0
2.55
2.5
3.6
4.0
30
V
mA
mA
V
V
Conditions
Min
Typ
Max
Unit
Resolution
Remote Diode Sensor Accuracy (Note 2)
°C
°C
Resolution
Remote Sensor Source Current
°C
mA
mA
ms
ms
See Table 6 for information on other conversion rates.
Averaging enabled.
Guaranteed by characterization, not production tested.
Guaranteed by design, not production tested.
See Timing Specifications section for more information.
Disabled by default. See the Serial Bus Interface section for details to enable it.
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