and V+ = 3.3 V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Temperature resolution

Including sign bit

12

Bits

LSB

62.5

m°C

1-Hz conversion cycle

TBD

LSB

Long-term stability and drift

300 hours at 150°C(3)

TBD

°C

Temperature cycling and

hysteresis(4)

TBD

LSB

Conversion time

One-shot mode

26

35

ms

CR1 = 0, CR0 = 0 (default)

4

s

CR1 = 0, CR0 = 1

1

s

CR1 = 1, CR0 = 0

0.25

s

CR1 = 1, CR0 = 1

0.125

s

Timing variation of all device

settings

TBD

%

Unmounted

(Single layer Flex PCB)

τ = 63 %

25 °C to 75 °C

TBD

ms

Mounted

(2-layer 62-mil PCB)

TBD

ms

DIGITAL INPUT/OUTPUT

Input capacitance

Baud Rate = 57600 bps

TBD

pF

Output driver impedance

RX

TBD

Ω

Input logic high level

TX

0.7 × (V+)

(V+) + 0.3

V

Input logic low level

TX

–0.5

0.3 × (V+)

V

Input leakage current

–1

1

μA

Output low level

0

0.4

V

0

0.2 × (V+)

V

Output high level

(V+) – 0.4

V+

V

0.8 × (V+)

V+

V

POWER SUPPLY

VE

Supply current during active

conversion

Active Conversion, serial bus inactive

TBD

TBD

μA

V+ = 3.3V, CR1 = 0, CR0

= 0 (default)

Serial bus inactive

3

10

μA

Serial bus active

53

Standby current(5)

Serial bus inactive.

TBD

TBD

μA

Shutdown current

Serial bus inactive. V+ = 3.3V

0.6

5

μA

Power-on reset threshold

voltage

Supply rising

0.9

V

Brownout detect

Supply falling

TBD

V

DD

Supply rising or falling

1

ms

(1)

Does not include effects of self heating.

(2)

Repeatability is the ability to reproduce a reading when the measured temperature is applied consecutively, under the same conditions.

(3)

Long term stability is determined using accelerated operational life testing at a junction temperature of 150 °C.

(4)

Hysteresis is defined as the ability to reproduce a temperature reading as the temperature varies from room → hot

→room→cold→room. The temperatures used for this test are –40 °C, 25 °C, and 150 °C.

(5)

Quiescent current between conversions

www.ti.com

TMP144

SBOS891A – OCTOBER 2018 – REVISED FEBRUARY 2021

Copyright © 2021 Texas Instruments Incorporated

Submit Document Feedback

5

Product Folder Links: TMP144