4

TMP451-Q1

SLOS877B – OCTOBER 2014 – REVISED JUNE 2019

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6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

MIN

NOM

MAX

UNIT

Supply voltage

1.7

3.3

3.6

V

Operating free-air temperature

–40

125

°C

(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report (SPRA953).

6.4 Thermal Information

TMP451-Q1

UNIT

DQF (WSON)

DQW

(WSON)

8 PINS

8 PINS

Junction-to-ambient thermal resistance

171.3

128.5

°C/W

Junction-to-case (top) thermal resistance

81.4

67.9

°C/W

Junction-to-board thermal resistance

137.9

56.9

°C/W

Junction-to-top characterization parameter

3.9

4.4

°C/W

Junction-to-board characterization parameter

140

56.5

°C/W

Junction-to-case (bottom) thermal resistance

—

—

°C/W

(1)

Tested with less than 5-

Ω effective series resistance and 100-pF differential input capacitance.

6.5 Electrical Characteristics

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

TEMPERATURE ERROR

Local temperature sensor

±0.25

±1

°C

±1

±2

°C

±0.25

±1

°C

±1

±2

°C

±2

±4

°C

Remote temperature sensor versus supply

(local or remote)

V+ = 1.7 V to 3.6 V

±0.1

±0.25

°C/V

TEMPERATURE MEASUREMENT

Conversion time

One-Shot mode, local and remote total

31

34

ms

Local temperature sensor resolution

12

Bits

Remote temperature sensor resolution

12

Bits

Remote sensor source current, high

Series resistance 1 k

Ω max

120

μA

Remote sensor source current, medium

45

μA

Remote sensor source current, low

7.5

μA

η

Remote transistor ideality factor

TMP451-Q1 optimized ideality factor

1.008

SMBus INTERFACE

High-level input voltage

1.4

V

Low-level input voltage

0.45

V

Hysteresis

200

mV

SMBus output low sink current

6

mA

Low-level output voltage

0.15

0.4

V

Logic input current

0 V

–1

1

μA

SMBus input capacitance

3

pF

SMBus clock frequency

0.01

2.5

MHz

SMBus timeout

20

25

30

ms

SCL falling edge to SDA valid time

1

μs