MAX6678AEP90 datasheet(4/19 Pages) MAXIM

Part #	MAX6678AEP90

Description	2-Channel Temperature Monitor with Dual Automatic PWM Fan-Speed Controller and Five GPIOs

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Manufacturer	MAXIM [Maxim Integrated Products]

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2-Channel Temperature Monitor with Dual Automatic

PWM Fan-Speed Controller and Five GPIOs

4

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(TA = +25°C, unless otherwise noted.)

-3

-1

-2

1

0

2

3

050

25

75

100

125

LOCAL TEMPERATURE ERROR

vs. DIE TEMPERATURE

TEMPERATURE (°C)

-1.5

0

-0.5

-1.0

1.0

0.5

1.5

2.0

0.01

1

0.1

10

100

1000

REMOTE TEMPERATURE ERROR

vs. POWER-SUPPLY NOISE FREQUENCY

FREQUENCY (kHz)

VIN = 250mVP-P SQUARE WAVE APPLIED

TO VCC WITH NO BYPASS CAPACITOR

-2.5

-1.0

-1.5

-2.0

0

-0.5

0.5

1.0

0.01

1

0.1

10

100

1000

LOCAL TEMPERATURE ERROR

vs. POWER-SUPPLY NOISE FREQUENCY

FREQUENCY (kHz)

VIN = 250mVP-P SQUARE WAVE APPLIED

TO VCC WITH NO BYPASS CAPACITOR

0

1.4

1.2

1.0

0.8

0.6

0.4

0.2

1.8

1.6

2.0

0.01

1

0.1

10

100

1000

REMOTE TEMPERATURE ERROR

vs. COMMON-MODE NOISE FREQUENCY

FREQUENCY (kHz)

VIN = AC-COUPLED TO DXP AND DXN

VIN = 100mVP-P SQUARE WAVE

0

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.9

0.8

1.0

0.01

1

0.1

10

100

1000

REMOTE TEMPERATURE ERROR

vs. DIFFERENTIAL NOISE FREQUENCY

FREQUENCY (kHz)

VIN = AC-COUPLED TO DXP

VIN = 100mVP-P SQUARE WAVE

-6

-3

-5

-4

-1

-2

1

0

2

0.1

1

10

100

TEMPERATURE ERROR

vs. DXP-DXN CAPACITANCE

DXP-DXN CAPACITANCE (nF)

TA = +25°C

30

31

33

32

34

35

-40

10

35

-15

60

110

85

PWMOUT FREQUENCY

vs. DIE TEMPERATURE

TEMPERATURE (°C)

30

31

33

32

34

35

3.0

4.0

3.5

4.5

5.0

5.5

PWMOUT FREQUENCY

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

0

100

300

200

400

500

010

15

520

25303540

GPIO OUTPUT VOLTAGE

vs. GPIO SINK CURRENT

GPIO SINK CURRENT (mA)

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