ADT7490(2016) 查看數據表（PDF） - ON Semiconductor
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ADT7490 Datasheet PDF : 75 Pages
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ADT7490
Table 3. ELECTRICAL CHARACTERISTICS (continued)
(TA = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted) (Note 1)
Parameter
Conditions
Analog-to-Digital Converter (Including MUX and Attentuators)
Total Unadjusted Error (TUE)
Differential Non-linearity (DNL)
For All Channels: −40°C ≤ TA ≤ +125°C
For All Other Channels Except +12 VIN:
0°C ≤ TA ≤ +125°C
8 Bits
Power Supply Sensitivity
Conversion Times (Note 2)
Voltage Inputs
VTT Voltage Input (Note 3)
Local Temperature
Remote Temperature
Averaging Enabled, All Channels
Excluding VTT (Note 3)
Averaging Enabled
Averaging Enabled
Averaging Enabled
Averaging Enabled
Total Monitoring Cycle Time
Averaging disabled
Input Resistance
For +12 VIN Channel
For All Other Channels
Fan RPM-to-Digital Converter
Accuracy
Full-scale Count
0°C ≤ TA ≤ 85°C
−40°C ≤ TA ≤ +125°C
Nominal Input RPM
Fan Count = 0xBFFF
Fan Count = 0x3FFF
Fan Count = 0x0438
Fan Count = 0x021C
Open-Drain Digital Outputs, PWM1 TO PWM3, XTO
Current Sink, IOL
Output Low Voltage, VOL
IOUT = −8.0 mA
High Level Output Current, IOH
VOUT = VCC
Open-Drain Serial Data Bus Output (SDA)
Output Low Voltage, VOL
High Level Output Current, IOH
SMBus Digital Inputs (SCL, SDA)
IOUT = −4.0 mA
VOUT = VCC
Input High Voltage, VIH
Input Low Voltage, VIL
Hysteresis
Digital I/O (PECI Pin) (Note 2)
VTT, Supply Voltage
Input High Voltage, VIH
Input Low Voltage, VIL
Hysteresis (Note 2)
High Level Output Source Current,
ISOURCE
Low Level Output Sink Current, ISINK
Signal Noise Immunity, VNOISE
Hysteresis between Input Switching
Levels
VOH = 0.75 × VTT
VOL = 0.25 × VTT
Noise Glitches from 10 MHz to
100 MHz, Width Up to 50 ns
Min
Typ
Max
−
−
±2
−
−
±1.5
−
−
±1
−
±0.1
−
−
11
13
−
12
14
−
12
14
−
38
43
−
169
193
−
19
−
150
200
−
70
100
−
−
−
±10
−
−
±14
−
−
65,535
−
109
−
−
329
−
−
5,000
−
−
10,000
−
−
−
8.0
−
−
0.4
−
0.1
20
−
−
0.4
−
0.1
1.0
2.0
−
−
−
−
0.8
−
500
−
0.95
−
1.26
0.55 × VTT
−
−
(Note 3)
−
−
0.5 × VTT
(Note 3)
0.1 × VTT
−
−
(Note 3)
−
−
6.0
0.5
−
1.0
300
−
−
Unit
%
LSB
%/V
ms
ms
kW
%
RPM
mA
V
mA
V
mA
V
V
mV
V
V
V
mV
mA
mA
mV
p-p
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