ADT7473ARQZ-001 datasheet(3/74 Pages) ONSEMI

Part #	ADT7473ARQZ-001

Description	dBCOOL Remote Thermal Monitor and Fan Control

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Manufacturer	ONSEMI [ON Semiconductor]

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ADT7473

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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

3.0

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

Resolution

0°C ≤ TA ≤ 85°C

−40°C ≤ TA ≤ +125°C

±0.5

0.25

±1.5

±2.5

°C

Remote Sensor Source Current

First Current

Second Current

Third Current

6

36

96

mA

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

Total Unadjusted Error (TUE)

±1.5

%

Differential Nonlinearity (DNL)

8 bits

±1.0

LSB

Power Supply Sensitivity

±0.1

%/V

Conversion Time (Voltage Input)

Averaging enabled

11

ms

Conversion Time (Local Temperature)

Averaging enabled

12

ms

Conversion Time (Remote Temperature)

Averaging enabled

38

ms

Total Monitoring Cycle Time

Averaging enabled

Averaging disabled

145

19

ms

Input Resistance

For VCCP channel

70

120

kW

Fan RPM−to−Digital Converter

Accuracy

0°C ≤ TA ≤ 70°C

−40°C ≤ TA ≤ +120°C

±6.0

±10

%

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

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

Output High Voltage, VOH

0.75 x VCC

V

Output Low Voltage, VOL

0.4

V

SMBus Digital Inputs (SCL, SDA)

Input High Voltage, VIH

2.0

V

Input Low Voltage, VIL

0.4

V

Hysteresis

500

mV

Digital Input Logic Levels (TACH Inputs)

Input High Voltage, VIH

Maximum input voltage

2.0

3.6

V

Input Low Voltage, VIL

Minimum input voltage

−0.3

0.8

V

Hysteresis

0.5

V p−p

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ADT7473ARQZ-001 Datasheet(PDF) 3 Page - ON Semiconductor

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