ADM9240 datasheet(2/22 Pages) AD

Part #	ADM9240

Description	Low Cost Microprocessor System Hardware Monitor

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–2–

REV. 0

ADM9240–SPECIFICATIONS1, 2

Parameter

Min

Typ

Max

Units

Test Conditions/Comments

POWER SUPPLY

Supply Voltage, VCC

2.85

5

5.75

V

Supply Current, ICC

1.4

2.0

mA

Interface Inactive, ADC Active

1.0

mA

ADC Inactive, DAC Active

25

100

µA

Shutdown Mode

TEMPERATURE-TO-DIGITAL CONVERTER

Accuracy

±3

°C

–40

°C ≤ T

A ≤ +125°C

±2

°C

TA = +25°C

Resolution

±0.5

°C

ANALOG-TO-DIGITAL CONVERTER

(INCLUDING MUX AND ATTENUATORS)

Total Unadjusted Error, TUE

±2

%

Note 3

Differential Nonlinearity, DNL

±1

LSB

Power Supply Sensitivity

±1

%/V

Total Monitoring Cycle Time

311

331

µs

+25

°C ≤ T

A

≤ +125°C (Note 4)

311

353

µs

–40

°C ≤ T

A

≤ +125°C (Note 4)

Input Resistance

100

140

200

k

Ω

ANALOG OUTPUT

Output Voltage Range

0

1.25

V

Total Unadjusted Error, TUE

±3%

IL = 2 mA

Full-Scale Error

±1

±3%

Zero Error

2

LSB

No Load

Differential Nonlinearity, DNL

±1

LSB

Integral Nonlinearity

±1

LSB

Monotonic by Design

Output Source Current

2

mA

Output Sink Current

1

mA

FAN RPM-TO-DIGITAL CONVERTER

Accuracy

±6

%

+25

°C ≤ T

A

≤ +125°C

±12

%

–40

oC

≤ T

A

≤ +125°C

Full-Scale Count

255

FAN1 and FAN2 Nominal Input RPM

8800

rpm

Divisor = 1, Fan Count = 153

(Note 5)

4400

rpm

Divisor = 2, Fan Count = 153

(Note 5)

2200

rpm

Divisor = 3, Fan Count = 153

(Note 5)

1100

rpm

Divisor = 4, Fan Count = 153

(Note 5)

Internal Clock Frequency

21.1

22.5

23.9

kHz

+25

°C ≤ T

A

≤ +125°C

19.8

22.5

25.2

kHz

–40

oC

≤ T

A

≤ +125°C

DIGITAL OUTPUT NTEST_OUT

Output High Voltage, VOH

2.4

V

IOUT = 5.0 mA,

VCC = 4.25 V–5.75 V

2.4

V

IOUT = 3.0 mA,

VCC = 2.85 V–3.45 V

Output Low Voltage, VOL

0.4

V

IOUT = –5.0 mA,

VCC = 4.25 V–5.75 V

0.4

V

IOUT = –3.0 mA,

VCC = 2.85 V–3.45 V

OPEN-DRAIN DIGITAL OUTPUTS

(

INT, RESET, CI)

Output Low Voltage, VOL

0.4

V

IOUT = –5.0 mA, VCC = 5.75 V

0.4

V

IOUT = –3.0 mA, VCC = 3.45 V

High Level Output Current, IOH

0.1

100

µAV

OUT = VCC

RESET and CI Pulsewidth

20

45

ms

(TA = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted)

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