ADT7482ARMZ datasheet(3/24 Pages) AD

3 / 24 page

ADT7482

Rev. 0 | Page 3 of 24

SPECIFICATIONS

TA = −40°C to +120°C , VDD = 3 V to 3.6 V, unless otherwise noted.

Table 1.

Parameter

Min

Typ

Max

Unit

Test Conditions

POWER SUPPLY

Supply Voltage, VDD

3.0

3.30

3.6

Average Operating Supply Current, IDD

240

350

μA

0.0625 conversions/sec rate1

μA

Standby mode

Undervoltage Lockout Threshold

2.55

VDD input, disables ADC, rising edge

Power-On Reset Threshold

2.5

TEMPERATURE-TO-DIGITAL CONVERTER

Local Sensor Accuracy

±1

°C

0°C ≤ TA ≤ +70°C

±1.5

°C

0°C ≤ TA ≤ +85°C

±2.5

°C

−40°C ≤ TA ≤ +100°C

Resolution

°C

Remote Diode Sensor Accuracy

±1

°C

0°C ≤ TA ≤ +70°C, −55°C ≤ TD

2 ≤ +150°C

±1.5

°C

0°C ≤ TA ≤ +85°C, −55°C ≤ TD2 ≤ +150°C

±2.5

°C

−40°C ≤ TA ≤ +100°C, −55°C ≤ TD2 ≤ +150°C

Resolution

0.25

°C

Remote Sensor Source Current

220

μA

High level3

μA

Mid level3

13.5

μA

Low level2

Maximum Series Resistance Cancelled

1.5

kΩ

Resistance split evenly on D+ and D− lines

Conversion Time

From stop bit to conversion complete (all channels) one-shot mode

with averaging switched on

11.5

One-shot mode with averaging off (that is, conversion rate = 16, 32,

or 64 conversions per second)

OPEN-DRAIN DIGITAL OUTPUTS

(THERM, ALERT/THERM2)

Output Low Voltage, VOL

0.4

IOUT = −6.0 mA

High Level Output Leakage Current, IOH

0.1

μA

VOUT = VDD

SMBus INTERFACE3, 4

Logic Input High Voltage, VIH

2.1

SCLK, SDATA

Logic Input Low Voltage, VIL

0.8

SCLK, SDATA

Hysteresis

500

SDA Output Low Voltage, VOL

0.4

IOUT = −6.0 mA

Logic Input Current, IIH, IIL

−1

μA

SMBus Input Capacitance, SCLK, SDATA

SMBus Clock Frequency

400

kHz

SMBus Timeout5

User programmable

SCLK Falling Edge to SDATA Valid Time

μs

Master clocking in data

1 See Table 11 for 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.

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