APPLICATION INFORMATION

0.1 F

m

10kW

(typ)

10kW

(typ)

TMP441

DXP

DXN

V+

8

7

6

5

2

1

R

S

(2)

R

S

(2)

C

DIFF

(3)

C

DIFF

(3)

R

S

(2)

R

S

(2)

GND

SCL

SDA

+5V

SMBus

Controller

Diode-connectedtransistorconfiguration :

(1)

SeriesResistance

GNDcollector-connectedtransistorconfiguration:

(1)

(1)Diode-connectedtransistorconfigurationprovidesbettersettlingtime.

GNDcollector-connectedtransistorconfigurationprovidesbetterseriesresistancecancellation.

(2)R shouldbe<1kW inmostapplications.SelectionofR dependsonapplication;seethe

section.

Filtering

S

S

(3)C

shouldbe<500pFinmostapplications.SelectionofC

dependsonapplication;

DIFF

DIFF

NOTES:

A1

A0

4

3

seethe

sectionandFigure9,

Filtering

RemoteTemperatureErrorvsDifferentialCapacitance.

TMP442

DXP1

DXN1

5

2

1

R

S

(2)

R

S

(2)

C

DIFF

(3)

C

DIFF

(3)

R

S

(2)

R

S

(2)

GND

Diode-connectedtransistorconfiguration :

(1)

SeriesResistance

GNDcollector-connectedtransistorconfiguration:

(1)

(1)Diode-connectedtransistorconfigurationprovidesbettersettlingtime.

GNDcollector-connectedtransistorconfigurationprovidesbetterseriesresistancecancellation.

(2)R shouldbe<1kW inmostapplications.

SelectionofR dependsonapplication;seethe

section.

SelectionofC

dependsonapplication;

Filtering

(3)C

shouldbe<500pFinmostapplications.

S

S

DIFF

DIFF

NOTES:

DXP2

DXN2

4

3

R

S

(2)

R

S

(2)

C

DIFF

(3)

0.1 F

m

10kW

(typ)

10kW

(typ)

V+

8

7

6

SCL

SDA

+5V

SMBus

Controller

DXP1

DXN1

DXP2

DXN2

seethe

sectionandFigure9,

Filtering

RemoteTemperatureErrorvsDifferentialCapacitance.

TMP441

TMP442

For proper remote temperature sensing operation, the

The TMP441/42 are digital temperature sensors that

TMP441

requires

only

a

transistor

connected

combine

a

local

die

temperature

measurement

between DXP and DXN; the TMP442 requires

channel and one (TMP441) or two (TMP442) remote

transistors connected between DXP1 and DXN1 and

junction temperature measurement channels in a

between DXP2 and DXN2. The SCL and SDA

single

SOT23-8

package.

The

TMP441/42

are

interface pins require pull-up resistors as part of the

Two-Wire- and SMBus interface-compatible and are

communication bus. A 0.1

µF power-supply bypass

specified over a temperature range of –40°C to

capacitor is recommended for good local bypassing.

+125°C. The TMP441/42 contain multiple registers

Figure 12 shows a typical configuration for the

for holding configuration information and temperature

TMP441; Figure 13 shows a typical configuration for

measurement results.

the TMP442.

Figure 12. TMP441 Basic Connections

Figure 13. TMP442 Basic Connections

8

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