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© Andigilog, Inc. 2006
www.andigilog.com
December 2006 - 70A05012
aSC7531A / aSC7531B
Absolute Maximum Ratings
1
Parameter
Rating
Supply Voltage, VDD
-0.3, +3.63V
Voltage on any Digital Input or Output
3
-0.3V to VDD +
0.3V
Voltage on 12V Analog Input
3
16V
Voltage on 5V Analog Input
3
6.5V
Voltage on Other Analog Inputs
3
VDD + 0.3V
Input Current on any pin
3
±5mA
Package Input Current
3
±20mA
Relative Humidity (non-operating)
5% - 85% RH
@ 25
°C to 70°C
Maximum Junction Temperature, TJmax
150
°C
Storage Temperature Range
-60
°C to +150°C
IR Reflow Peak Temperature
260
°C
Lead Soldering Temperature (10 sec.)
300
°C
Human Body Model
2000 V
Machine Model
250 V
ESD
5
Charged-Device Model
>1000 V
Notes:
1.
Absolute maximum ratings are limits beyond which operation
may cause permanent damage to the device. These are
stress ratings only; functional operation at or above these
limits is not implied. For guaranteed specifications and test
conditions, see the Electrical Characteristics. The guaranteed
specifications apply only for the test conditions listed. Some
performance characteristics may degrade when the device is
not operated under the listed test conditions.
2.
All voltages are measured with respect to GND, unless
otherwise specified.
3.
When the input voltage (VIN) at any pin exceeds the power
supplies (VIN< (GND or GNDA) or VIN>V+, except for SST
and analog voltage inputs), the current at that pin should be
limited to 5mA. The 20mA maximum package input current
rating limits to number of pins that can safely exceed the
power supplies with an input current of 5mA to four.
4.
The maximum power dissipation must be de-rated at elevated
temperatures and is dictated by TJmax, θJA and the ambient
temperature, TA. The maximum allowable power dissipation at
any temperature is PD = (TJmax - TA) / θJA. It must also take
into account self-heating that can adversely affect the
accuracy of internal sensors.
5.
Human Body Model: 100pF capacitor discharged through a
1.5k
Ω resistor into each pin. Machine Model: 200pF capacitor
discharged directly into each pin. Charged-Device Model is
per JESD22-C101C.
Electrical Characteristics
6
(-40°C≤TA≤+125°C, VDD= 3.3V unless otherwise noted. Specifications subject to change without notice)
Parameter
Conditions
Min
Typ
Max
Units
Supply Voltage
VDD
3.0
3.3
3.6
V
SST Signal
Meets SST Specification Version 1.0
for 1.5V interface
-40°C≤TA≤+125°C
±3
°C
Local Sensor Accuracy
7, 8
40°C
≤TA≤70°C
±2
°C
Local Sensor Resolution
0.125
°C
0°C
≤TA≤70°C,
-40°C
≤TD ≤+125°C
±3
°C
Remote Diode Sensor Accuracy
7, 8, 9
0°C
≤TA≤70°C,
50°C
≤TD ≤70°C
±1
°C
Remote Diode Sensor Resolution
0.125
°C
Temperature Monitor Cycle Time
10
tC
0.2
Sec
ADC Total Unadjusted Error
11
TUE
2
% FS
ADC Differential Nonlinearity
DNL
±1
LSB
ADC Power Supply Sensitivity
PSS
±1
% / V
ADC Resolution
7.8
mV
ADC Total Monitoring Cycle Time
10
tC
0.2
Sec
ADC Input Resistance
140
≥100
kΩ
Notes:
6.
These specifications are guaranteed only for the test conditions listed.
7.
Accuracy (expressed in °C) = Difference between the aSC7531 reported temperature and the device temperature.
8.
The aSC7531 can be read at any time without interrupting the temperature conversion process.
9.
For the aSC7531A, calibration of the remote diode sensor input is set to meet the accuracy limits with a diode-connected 2N3904 that has
a non-ideality factor of 1.0046 with a series resistance of 0.6Ω. For the aSC7531B, calibration of the remote diode sensor input is set to
meet the accuracy limits with a CPU substrate diode that has a non-ideality factor of 1.009 with a series resistance of 4.52Ω.
10. Total monitoring cycle time for all temperature and analog input voltage measurements is 0.2 second.
11. TUE includes Offset, Gain and Linearity errors of the ADC.
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