ADT7475ARQZ-REEL datasheet(3/68 Pages) AD

Part #	ADT7475ARQZ-REEL

Description	dBCool Remote Thermal Monitor and Fan Controller

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Manufacturer	AD [Analog Devices]

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ADT7475

Rev. A | Page 3 of 68

SPECIFICATIONS

TA = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted.1

Table 1.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

POWER SUPPLY

Supply Voltage

3.0

3.3

3.6

V

Supply Current, ICC

1.5

3

mA

Interface inactive, ADC active

TEMPERATURE-TO-DIGITAL CONVERTER

Local Sensor Accuracy

±0.5

1.5

°C

0°C ≤ TA ≤ 85°C

±2.5

°C

−40°C ≤ TA ≤ +125°C

Resolution

0.25

°C

Remote Diode Sensor Accuracy

±0.5

1.5

°C

0°C ≤ TA ≤ 85°C

±2.5

°C

−40°C ≤ TA ≤ +125°C

Resolution

0.25

°C

Remote Sensor Source Current

180

µA

High Level

11

µΑ

Low Level

ANALOG-TO-DIGITAL CONVERTER

(INCLUDING MUX AND ATTENUATORS)

Total Unadjusted Error (TUE)

±1.5

%

Differential Nonlinearity (DNL)

±1

LSB

8 bits

Power Supply Sensitivity

±0.1

%/V

Conversion Time (Voltage Input)

11

ms

Averaging enabled

Conversion Time (Local Temperature)

12

ms

Averaging enabled

Conversion Time (Remote Temperature)

38

ms

Averaging enabled

Total Monitoring Cycle Time

145

ms

Averaging enabled

19

ms

Averaging disabled

Input Resistance

70

120

kΩ

For VCCP channel

FAN RPM-TO-DIGITAL CONVERTER

Accuracy

±6

%

0°C ≤ TA ≤ 70°C

±10

%

−40°C ≤ TA ≤ +120°C

Full-Scale Count

65,535

Nominal Input RPM

109

RPM

Fan count = 0xBFFF

329

RPM

Fan count = 0x3FFF

5000

RPM

Fan count = 0x0438

10,000

RPM

Fan count = 0x021C

OPEN-DRAIN DIGITAL OUTPUTS

(PWM1 TO PWM3, XTO)

Current Sink, IOL

8.0

mA

Output Low Voltage, VOL

0.4

V

IOUT = −8.0 mA

High Level Output Current, IOH

0.1

20

µA

VOUT = VCC

OPEN-DRAIN SERIAL DATA BUS OUTPUT (SDA)

Output Low Voltage, VOL

0.4

V

IOUT = −4.0 mA

High Level Output Current, IOH

0.1

1.0

µA

VOUT = VCC

SMBus DIGITAL INPUTS (SCL, SDA)

Input High Voltage, VIH

2.0

V

Input Low Voltage, VIL

0.4

V

Hysteresis

500

mV

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