ADT7490ARQZ-R7 datasheet(4/75 Pages) ONSEMI

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ADT7490

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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

Supply Current, ICC

Interface inactive, ADC active

1.5

5.0

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

192

Series Resistance Cancellation

(Note 2)

The ADT7490 cancels up to 2 kW in

series with the remote thermal sensor

1.5

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

Total Monitoring Cycle Time

Averaging disabled

169

193

Input Resistance

For +12 VIN channel

For all other channels

150

200

100

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

Output Low Voltage, VOL

IOUT = −8.0 mA

0.4

High Level Output Current, IOH

VOUT = VCC

0.1

Open−Drain Serial Data Bus Output (SDA)

Output Low Voltage, VOL

IOUT = −4.0 mA

0.4

High Level Output Current, IOH

VOUT = VCC

0.1

1.0

SMBus Digital Inputs (SCL, SDA)

Input High Voltage, VIH

2.0

Input Low Voltage, VIL

0.8

Hysteresis

500

ADT7490ARQZ-R7 Datasheet(PDF) 4 Page - ON Semiconductor

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