ADM1034ARQZ datasheet(4/39 Pages) ONSEMI

4 / 39 page

ADM1034

http://onsemi.com

ELECTRICAL CHARACTERISTICS (TA = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted. (Note 1)

Parameter

Test Conditions / Comments

Min

Typ

Max

Unit

Power Supply

Supply Voltage, VCC (Note 2)

3.0

3.30

3.6

Supply Current, ICC

Interface inactive, ADC active

3.0

Standby mode

900

Undervoltage Lockout Threshold

2.5

Power−On Reset Threshold

1.0

2.4

Temperature−to−Digital Converter

Internal Sensor Accuracy

+20°C ≤ TA ≤ +60°C

−40°C ≤ TA ≤ +100°C

±1.0

±2.0

±2.5

°C

Resolution

0.03125

°C

External Diode Sensor Accuracy

−40°C ≤ TD ≤ +100°C; TA = +40°C

−40°C ≤ TD ≤ +100°C; +20°C ≤ TA ≤ +60°C

−40°C ≤ TD ≤ +100°C; −40°C ≤ TA ≤ +100°C

±0.5

±1.0

±1.25

±2.5

°C

Resolution

0.03125

°C

Remote Sensor Source Current

High level

Mid level

Low level

5.5

Series Resistance Cancellation

1000

Power Supply Sensitivity

±1.0

%/V

Conversion Time (Local Temperature)

Averaging enabled

Conversion Time (Remote Temperature)

Averaging enabled

Total Conversion Time

Averaging enabled

Open−Drain Digital Outputs (ALERT, THERM, FAN_FAULT, DRIVE1, DRIVE2) (Note 3)

Output Low Voltage, VOL

IOUT = −6.0 mA; VCC = +3 V

0.4

High Level Output Leakage Current, IOH

VOUT = VCC; VCC = 3 V

0.1

1.0

Digital Input Leakage Current (TACH1, TACH2)

Input High Current, IIH

−VIN = VCC

−1.0

Input Low Current, IIL

VIN = 0

1.0

Input Capacitance, CIN

7.0

Digital Input Logic Levels (TACH1, TACH2)

Input High Voltage, VIH

2.0

5.5

Input Low Voltage, VIL

−0.3

+0.8

Hysteresis

500

mV p−p

Open−Drain Serial Data Bus Output (SDA)

Output Low Voltage, VOL

IOUT = −6.0 mA; VCC

0.4

High Level Output Leakage Current, IOH

VOUT = VCC

0.1

1.0

Serial Data Bus Inputs (SCL, SDA)

Input High Voltage, VIH

2.1

Input Low Voltage, VIL

0.8

Hysteresis

500

Analog Inputs (Location, REF)

Input Resistance

125

160

1. Typicals are at TA = 25°C and represent most likely parametric norm. Standby current typ. is measured with VCC = 3.3 V. Timing

specifications are tested at logic levels of VIL = 0.8 V for a falling edge and VIH = 2.1 V for a rising edge.

2. Operation at 5.5 V is guaranteed by design, not production tested.

3. Recommend use of 100 kW pullup resistors for all open−drain outputs from the ADM1034.

4. Guaranteed by design, not production tested.

5. SMBus timeout disabled by default. See the SMBus section for more information.

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