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ADT7490 Datasheet(PDF) 4 Page - ON Semiconductor

Part # ADT7490
Description  dBCool Remote Thermal Monitor and Fan Controller with PECI Interface
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

ADT7490 Datasheet(HTML) 4 Page - ON Semiconductor

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ADT7490
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS TA = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted. (Note 1)
Parameter
Conditions
Min
Typ
Max
Unit
Power Supply
Supply Voltage
3.0
3.3
3.6
V
Supply Current, ICC
Interface inactive, ADC active
1.5
5.0
mA
Temperature−to−Digital Converter
Local Sensor Accuracy
Resolution
0°C ≤ TA ≤ 85°C
−40°C ≤ TA ≤ +125°C
±0.5
0.25
±1.5
±2.5
°C
Remote Diode Sensor Accuracy
0°C ≤ TA ≤ 85°C
−40°C ≤ TA ≤ +125°C
±0.5
0.25
±1.5
±2.5
°C
Remote Sensor Source Current
Mid level
Low level
High level
12
72
192
mA
Series Resistance Cancellation
(Note 2)
The ADT7490 cancels up to 2 kW in
series with the remote thermal sensor
1.5
kW
Analog−to−Digital Converter (Including MUX and Attentuators)
Total Unadjusted Error (TUE)
For all channels: −40°C ≤ TA ≤ +125°C
For all other channels except +12 VIN:
0°C ≤ TA ≤ +125°C
±2
±1.5
%
Differential Non−linearity (DNL)
8 bits
±1
LSB
Power Supply Sensitivity
±0.1
%/V
Conversion Times (Note 2)
Voltage Inputs
VTT Voltage Input (Note 3)
Local Temperature
Remote Temperature
Averaging enabled, all channels
excluding VTT (Note )
Averaging enabled
Averaging enabled
Averaging enabled
Averaging enabled
11
12
12
38
13
14
14
43
ms
Total Monitoring Cycle Time
Averaging disabled
169
19
193
ms
Input Resistance
For +12 VIN channel
For all other channels
150
70
200
100
kW
Fan RPM−to−Digital Converter
Accuracy
0°C ≤ TA ≤ 85°C
−40°C ≤ TA ≤ +125°C
±10
±14
%
Full−Scale Count
65,535
Nominal Input RPM
Fan count = 0xBFFF
Fan count = 0x3FFF
Fan count = 0x0438
Fan count = 0x021C
109
329
5000
10,000
RPM
Open−Drain Digital Outputs, PWM1 TO PWM3, XTO
Current Sink, IOL
8.0
mA
Output Low Voltage, VOL
IOUT = −8.0 mA
0.4
V
High Level Output Current, IOH
VOUT = VCC
0.1
20
mA
Open−Drain Serial Data Bus Output (SDA)
Output Low Voltage, VOL
IOUT = −4.0 mA
0.4
V
High Level Output Current, IOH
VOUT = VCC
0.1
1.0
mA
SMBus Digital Inputs (SCL, SDA)
Input High Voltage, VIH
2.0
V
Input Low Voltage, VIL
0.8
V
Hysteresis
500
mV


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