ELECTRICAL CHARACTERISTICS

TMP441

TMP442

www.ti.com .............................................................................................................................................. SBOS425A – DECEMBER 2008 – REVISED MARCH 2009

At TA = –40°C to +125°C and VS = 2.7V to 5.5V, unless otherwise noted.

TMP441, TMP442

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

TEMPERATURE ERROR

Local Temperature Sensor

TELOCAL

TA = –40°C to +125°C

±1.25

±2.5

°C

TA = 0°C to +100°C, VS = 3.3V

±0.25

±1

°C

Remote Temperature Sensor(1)

TEREMOTE

TA = 0°C to +100°C, TDIODE = –40°C to +150°C, VS = 3.3V

±0.25

±1

°C

TA = –40°C to +100°C, TDIODE = –40°C to +150°C, VS = 3.3V

±0.5

±1.5

°C

TA = –40°C to +125°C, TDIODE = –40°C to +150°C

±3

±5

°C

vs Supply (Local/Remote)

VS = 2.7V to 5.5V

0.2

±0.5

°C/V

TEMPERATURE MEASUREMENT

Conversion Time (per channel)

Local Channel

12

15

17

ms

Remote Channel

M

Beta Correction Enabled(2)

RC = 1

97

126

137

ms

RC = 0

36

47

52

ms

M

Beta Correction Disabled(3)

RC = 1

72

93

100

ms

RC = 0

33

44

47

ms

Resolution

Local Temperature Sensor

12

Bits

Remote Temperature Sensor

12

Bits

Remote Sensor Source Currents

High

Series resistance (beta correction)(4)

120

µA

Medium High

60

µA

Medium Low

12

µA

Low

6

µA

Remote Transistor Ideality Factor

η

TMP441/TMP442 optimized ideality factor

1.000(2)

1.008(3)

Beta Correction Range

β

0.1

27

SMBus INTERFACE

Logic Input High Voltage (SCL, SDA)

VIH

2.1

V

Logic Input Low Voltage (SCL, SDA)

VIL

0.8

V

Hysteresis

500

mV

SMBus Output Low Sink Current

6

mA

SDA Output Low Voltage

VOL

IOUT = 6mA

0.15

0.4

V

Logic Input Current

0

≤ VIN ≤ 6V

–1

+1

µA

SMBus Input Capacitance (SCL, SDA)

3

pF

SMBus Clock Frequency

3.4

MHz

SMBus Timeout

25

32

35

ms

SCL Falling Edge to SDA Valid Time

1

µs

DIGITAL INPUTS

Input Capacitance

3

pF

Input Logic Levels

Input High Voltage

VIH

0.7(V+)

(V+)+0.5

V

Input Low Voltage

VIL

–0.5

0.3(V+)

V

Leakage Input Current

IIN

0V

≤ VIN ≤ VS

1

µA

(1)

Tested with less than 5

Ω effective series resistance, 100pF differential input capacitance, and an ideal diode with

η-factor = 1.008. T

A is

the ambient temperature of the TMP441/42. TDIODE is the temperature at the remote diode sensor.

(2)

Beta correction configuration set to '1000' and sensor is GND collector-connected (PNP collector to ground).

(3)

Beta correction configuration set to '0111' or sensor is diode-connected (base shorted to collector).

(4)

If beta correction is disabled ('0111'), then up to 1k

Ω of series line resistance is cancelled; if beta correction is enabled ('1xxx'), up to

300

Ω is cancelled.

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