TMP442 datasheet(6/63 Pages) TI2

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6.5 Electrical Characteristics

Over free-air temperature range at TA = –40°C to 125°C and VDD = 1.62V to 5.5V (unless otherwise noted); Typical

specifications are at TA = 25°C and VDD = 3.3V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

TEMPERATURE SENSOR

TERR_L Local temperature accuracy

TA = –40°C to 125°C

–1

°C

TERR_R

Remote temperature accuracy

(Optimized for 2N3904 NPN

Transistor)

TD = –10°C to 85°C, TA = –10°C to 85°C

–0.8

0.8

°C

TD = –55°C to 125°C,

TA = –10°C to 85°C

–1.0

1.0

°C

TA = –40°C to 125°C

–1.5

1.5

°C

PSR

Supply Sensitivity on accuracy

Remote temperature sensor, one-shot mode, VDD

= 1.62V to 5.5V

0.05

°C/V

TRES_L

Temperature resolution (local)

Including sign bit

Bits

LSB

°C

TRES_R

Temperature resolution

(remote)

Including sign bit

Bits

LSB

0.0625

°C

TREPEAT Repeatability(1)

VDD = 3.3V, 1Hz conversion cycle, no averaging

1.5

LSB

tRT

Response time (Stirred Liquid,

mounted on 2-layer 62-mil

PCB)

τ = 63%

25°C to 75°C

Local temperature

sensor

1.5

τ = 63%

25°C to75 °C

Remote temperature

sensor (MMBT3904 NPN

Transistor)

0.5

VFMAX

Forward diode voltage

Supported voltage applied to remote diode

1.1

Series resistor

Supported series resistance on remote channel

1000

Ω

CDIFF

Differential filter capacitor

Supported capacitive filter connected across DP

and DN

1.5

tCONV

Conversion time

Local conversion only, one-shot mode

18.2

Remote (2-ch) + local conversion, one-shot mode

tVAR

Timing variation

Conversion period and conversion time

–10

DIGITAL INPUT/OUTPUT

CIN

Input capacitance

ALERT, T_CRIT, SCL,

SDA

f = 100kHz

VIH

Input logic high level

SCL, SDA

0.9

VIL

Input logic low level

SCL, SDA

0.4

VHYS

Input logic level hysteresis

SCL, SDA

100

ILI

Input leakage current

ALERT, T_CRIT, SCL, SDA

–0.1

0.1

μA

ILO

Output leakage current

ALERT, T_CRIT, SDA

–0.1

0.1

μA

VOL

Output low level

ALERT, T_CRIT, SDA, IOL = 3mA

0.15

0.4

POWER SUPPLY

IDD_ACTI

Active conversion current

TA = –40°C to 125°C

Serial bus inactive

Local conversion stage

100

150

μA

Remote conversion

stage

220

320

μA

IDD_AVG Average current consumption

Serial bus inactive,

continuous conversion

Conversion period = 1s,

all channels

μA

Conversion period =

0.125 s, all channels

μA

IDD_SB

Standby current(2)

Serial bus inactive

TA = 25°C

1.5

μA

TA = –40°C to 125°C

5.5

μA

TMP4719

SBOSAJ7A – OCTOBER 2025 – REVISED DECEMBER 2025

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