ADT7473(2011) データシートの表示（PDF） - ON Semiconductor

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ADT7473
(Rev.:2011)

dbCOOL™ Remote Thermal Monitor and Fan Control

ON Semiconductor 

ADT7473

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

3.0

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

Resolution

0°C ≤ TA ≤ 85°C

−40°C ≤ TA ≤ +125°C

±0.5

±1.5

±2.5

0.25

Remote Sensor Source Current

First Current

6

Second Current

36

Third Current

96

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

Total Unadjusted Error (TUE)

Differential Nonlinearity (DNL)

Power Supply Sensitivity

Conversion Time (Voltage Input)

Conversion Time (Local Temperature)

8 bits

Averaging enabled

Averaging enabled

±1.5

±1.0

±0.1

11

12

Conversion Time (Remote Temperature) Averaging enabled

38

Total Monitoring Cycle Time

Averaging enabled

145

Averaging disabled

19

Input Resistance

Fan RPM−to−Digital Converter

For VCCP channel

70

120

Accuracy

Full−Scale Count

Nominal Input RPM

0°C ≤ TA ≤ 70°C

−40°C ≤ TA ≤ +120°C

Fan count = 0xBFFF

Fan count = 0x3FFF

Fan count = 0x0438

Fan count = 0x021C

109

329

5000

10,000

±6.0

±10

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

IOUT = −4.0 mA

High Level Output Current, IOH

VOUT = VCC

Digital Output Logic Levels, ADT7473−1 (THERM_LATCH) ADTL+

0.4

0.1

1.0

Output High Voltage, VOH

Output Low Voltage, VOL

SMBus Digital Inputs (SCL, SDA)

0.75 x VCC

0.4

Input High Voltage, VIH

Input Low Voltage, VIL

Hysteresis

Digital Input Logic Levels (TACH Inputs)

2.0

0.4

500

Input High Voltage, VIH

Maximum input voltage

2.0

3.6

Input Low Voltage, VIL

Minimum input voltage

0.8

−0.3

Hysteresis

0.5

Unit

V

mA

°C

°C

mA

%

LSB

%/V

ms

ms

ms

ms

kW

%

RPM

mA

V

mA

V

mA

V

V

V

V

mV

V

V

V p−p

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