C

(3)

DIFF

C

(3)

DIFF

R

(2)

S

R

(2)

S

R

(2)

S

R

(2)

S

Diode-connectedconfiguration :

(1)

SeriesResistance

Transistor-connectedconfiguration :

(1)

DXP

DXN

V+

1

10

9

4

5

3

2

SCL

SDA

THERM

+5V

SMBus

Controller

8

GND

ALERTTHERM2

/

7

6

TMP435

A1

A0

TMP435

SBOS495A – MARCH 2010 – REVISED APRIL 2010

www.ti.com

For data captured in the extended temperature range

Both local and remote temperature data use two

configuration, an offset of 64 (40h) is added to the

bytes for data storage. The high byte stores the

standard binary value, as shown in Table 1, Extended

temperature with 1°C resolution. The second or low

Binary

column.

This

configuration

allows

byte

stores

the

decimal

fraction

value

of

the

measurement of temperatures as low as –64°C, and

temperature

and

allows

a

higher

measurement

as

high

as

+191°C;

however,

most

resolution, as shown in Table 2.

temperature-sensing diodes only measure with the

The measurement resolution for both the local and

range of –55°C to +150°C.

remote

channels

is

0.0625°C,

and

cannot

be

Additionally, the TMP435 is rated only for ambient

adjusted.

local temperatures ranging from –40°C to +125°C.

Parameters in the Absolute Maximum Ratings table

must be observed.

(1)

Diode-connected configuration provides better settling time. Transistor-connected configuration provides better series

resistance cancellation.

(2)

section.

(3)

Filtering section and Figure 9, Remote Temperature Error vs Differential Capacitance.

Figure 13. TMP435 Basic Connections

10

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