ADT7482

http://onsemi.com

4

Parameter

Test Conditions

Min

Typ

Max

Unit

Power Supply

3.0

3.30

3.6

V

0.0625 conversions/sec rate (Note 1)

240

350

mA

Standby mode

5.0

30

mA

Undervoltage Lockout Threshold

2.55

V

Power−On Reset Threshold

1.0

2.5

V

Temperature−to−Digital Converter

Local Sensor Accuracy

±1.0

±1.5

±2.5

°C

Resolution

1.0

°C

Remote Diode Sensor Accuracy (Note 2)

±1.0

±1.5

±2.5

°C

Resolution

0.25

°C

Remote Sensor Source Current

High level (Note 3)

Mid level (Note 3)

Low level (Note 2)

220

82

13.5

mA

Maximum Series Resistance Cancelled

Resistance split evenly on D+ and D− lines

1.5

kW

Conversion Time

From stop bit to conversion complete (all

channels) one−shot mode with averaging

switched on

71

11.5

93

ms

One−shot mode with averaging off

(conversion rate = 16, 32, or 64 conversions

per second)

71

11.5

15

ms

Open−Drain Digital Outputs (THERM, ALERT / THERM2)

0.4

V

0.1

1.0

mA

SMBus Interface (Note 3 and 4)

2.1

V

0.8

V

Hysteresis

500

mV

0.4

V

−1.0

+1.0

mA

SMBus Input Capacitance, SCLK, SDATA

5.0

pF

SMBus Clock Frequency

400

kHz

SMBus Timeout (Note 5)

User programmable

25

64

ms

SCLK Falling Edge to SDATA Valid Time

Master clocking in data

1.0

ms

1. See Table 11for conversion rates.

2. Guaranteed by characterization, but not production tested.

3. Guaranteed by design, but not production tested.

4. See the Timing Specifications section for more information.

5. Disabled by default. For details on enabling the SMBus, see the Serial Bus Interface section.