ADM1032ARMZ-2 데이터 시트보기 (PDF) - ON Semiconductor

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ADM1032ARMZ-2

±1°C Remote and Local System Temperature Monitor

ON Semiconductor 

ADM1032

Table 3. PIN ASSIGNMENT

Pin No.

1

2

3

4

Mnemonic

VDD

D+

D−

THERM

Description

Positive Supply, 3.0 V to 5.5 V.

Positive Connection to Remote Temperature Sensor.

Negative Connection to Remote Temperature Sensor.

THERM is an open-drain output that can be used to turn a fan on/off or throttle a CPU clock in the event

of an overtemperature condition. Requires pullup to VDD, the same supply as the ADM1032.

Note: Please refer to Power Sequencing Considerations; THERM Pin Pullup on page 15 for more

information.

5

GND

Supply Ground Connection.

6

ALERT

Open-Drain Logic Output Used as Interrupt or SMBus Alert.

7

SDATA

Logic Input/Output, SMBus Serial Data. Open-drain output. Requires pullup resistor.

8

SCLK

Logic Input, SMBus Serial Clock. Requires pullup resistor.

Table 4. ELECTRICAL CHARACTERISTICS

Parameter

Power Supply

Supply Voltage, VDD

Average Operating Supply Current, ICC

Undervoltage Lockout Threshold

Power-On Reset Threshold

Temperature-To-Digital Converter

Local Sensor Accuracy

Resolution

Remote Diode Sensor Accuracy

Resolution

Remote Sensor Source Current

Conditions

0.0625 Conversions/Sec Rate (Note 1)

Standby Mode

VDD Input, Disables ADC, Rising Edge

0 ≤ TA ≤ 100°C, VCC = 3 V to 3.6 V

60°C ≤ TD ≤ 100°C, VCC = 3 V to 3.6 V

0°C ≤ TD ≤ 120°C

High Level (Note 2)

Low Level (Note 2)

Min

Typ

Max Unit

3.0

3.30

5.5

V

−

170

215

mA

−

5.5

10

mA

2.35 2.55

2.8

V

1.0

−

2.4

V

−

±1

±3

°C

−

1.0

−

°C

−

−

±1

°C

−

−

±3

−

0.125

−

°C

−

230

−

mA

−

13

−

Conversion Time

From stop bit to conversion complete

35.7

Both channels: one-shot mode with averaging

switched on

One-shot mode with averaging off (that is,

5.7

conversion rate = 32 or 64 conversions per second)

−

142.8 ms

−

22.8

Open-Drain Digital Outputs (THERM, ALERT)

Output Low Voltage, VOL

High Level Output Leakage Current, IOH

Serial Bus Timing (Note 2)

IOUT = −6.0 mA (Note 2)

VOUT = VDD (Note 2)

Logic Input High Voltage, VIH

SCLK, SDATA

VDD = 3.0 V to 5.5 V

−

−

0.4

V

−

0.1

1.0

mA

2.1

−

−

V

Logic Input Low Voltage, VIL

Hysteresis

SCLK, SDATA

VDD = 3.0 V to 5.5 V

−

−

0.8

V

−

500

−

mV

SDATA Output Low Sink Current

ALERT Output Low Sink Current

Logic Input Current, IIH, IIL

Input Capacitance, SCLK, SDATA

SDATA Forced to 0.6 V

ALERT Forced to 0.4 V

6.0

−

−

mA

1.0

−

−

mA

−1.0

−

+1.0 mA

−

5.0

−

pF

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