ADT7483AARQZ-R7 datasheet(3/24 Pages) ONSEMI

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ADT7483A

Rev. 1 | Page 3 of 24 | www.onsemi.com

SPECIFICATIONS

TA = −40°C to +125°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 CONVERTER2

Local Sensor Accuracy

±1

°C

0°C ≤ TA ≤ 70°C

±1.5

°C

0°C ≤ TA ≤ 85°C

±2.5

°C

−40 ≤ TA ≤ 100°C

Resolution

°C

Remote Diode Sensor Accuracy

±1

°C

0°C ≤ TA ≤ 70°C, −55°C ≤ TD3 ≤ 150°C

±1.5

°C

0°C ≤ TA ≤ 85°C, −55°C ≤ TD3 ≤ 150°C

±2.5

°C

−40 ≤ TA ≤ 100°C, −55°C ≤ TD3 ≤ +150°C

Resolution

0.25

°C

Remote Sensor Source Current3

233

μA

High level

μA

Low level

Conversion Time

From stop bit to conversion complete (all channels),

one-shot mode with averaging switched on

One-shot mode with averaging off,

(conversion rate = 16, 32, or 64 conversions/sec)

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, SCLK, SDATA

2.1

Logic Input Low Voltage, VIL, SCLK, SDATA

0.8

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 information on other conversion rates.

2 Temperature accuracy guaranteed with averaging enabled.

3 Guaranteed by design, but not production tested.

4 See the SMBus Timing Specifications section for more information.

5 Disabled by default. Instructions to enable it are in the Serial Bus Interface section.

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