ADT7490ARQZ-REEL 查看數據表（PDF） - ON Semiconductor

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ADT7490ARQZ-REEL

dBCool Remote Thermal Monitor and Fan Controller with PECI Interface

ON Semiconductor 

ADT7490

ELECTRICAL CHARACTERISTICS TA = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted. (Note 1)

Parameter

Conditions

Min

Typ

Max

Power Supply

Supply Voltage

3.0

3.3

3.6

Supply Current, ICC

Temperature−to−Digital Converter

Interface inactive, ADC active

1.5

5.0

Local Sensor Accuracy

Resolution

0°C ≤ TA ≤ 85°C

−40°C ≤ TA ≤ +125°C

±0.5

±1.5

±2.5

0.25

Remote Diode Sensor Accuracy

0°C ≤ TA ≤ 85°C

−40°C ≤ TA ≤ +125°C

±0.5

±1.5

±2.5

0.25

Remote Sensor Source Current

Mid level

12

Low level

72

High level

192

Series Resistance Cancellation

The ADT7490 cancels up to 2 kW in

1.5

(Note 2)

series with the remote thermal sensor

Analog−to−Digital Converter (Including MUX and Attentuators)

Total Unadjusted Error (TUE)

Differential Non−linearity (DNL)

Power Supply Sensitivity

For all channels: −40°C ≤ TA ≤ +125°C

For all other channels except +12 VIN:

0°C ≤ TA ≤ +125°C

8 bits

±2

±1.5

±1

±0.1

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

13

12

14

12

14

38

43

Total Monitoring Cycle Time

Averaging disabled

169

193

19

Input Resistance

For +12 VIN channel

For all other channels

150

200

70

100

Fan RPM−to−Digital Converter

Accuracy

Full−Scale Count

Nominal Input RPM

0°C ≤ TA ≤ 85°C

−40°C ≤ TA ≤ +125°C

Fan count = 0xBFFF

Fan count = 0x3FFF

Fan count = 0x0438

Fan count = 0x021C

109

329

5000

10,000

±10

±14

65,535

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)

8.0

0.4

0.1

20

Output Low Voltage, VOL

High Level Output Current, IOH

SMBus Digital Inputs (SCL, SDA)

IOUT = −4.0 mA

VOUT = VCC

0.4

0.1

1.0

Input High Voltage, VIH

Input Low Voltage, VIL

Hysteresis

2.0

0.8

500

Unit

V

mA

°C

°C

mA

kW

%

LSB

%/V

ms

ms

kW

%

RPM

mA

V

mA

V

mA

V

V

mV

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