TMP435
SBOS495A –MARCH 2010–REVISED APRIL 2010
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For data captured in the extended temperature range
configuration, an offset of 64 (40h) is added to the
standard binary value, as shown in Table 1, Extended
Both local and remote temperature data use two
bytes for data storage. The high byte stores the
temperature with 1°C resolution. The second or low
byte stores the decimal fraction value of the
Binary
measurement of temperatures as low as –64°C, and
as high as +191°C; however, most
column.
This
configuration
allows
temperature and allows
a higher measurement
resolution, as shown in Table 2.
temperature-sensing diodes only measure with the
range of –55°C to +150°C.
The measurement resolution for both the local and
remote channels is 0.0625°C, and cannot be
adjusted.
Additionally, the TMP435 is rated only for ambient
local temperatures ranging from –40°C to +125°C.
Parameters in the Absolute Maximum Ratings table
must be observed.
+5V
Transistor-connected configuration(1)
:
1
Series Resistance
(2)
RS
V+
10
SCL
2
DXP
DXN
(3)
(2)
CDIFF
9
RS
SDA
3
7
6
SMBus
Controller
TMP435
4
A0
THERM
5
A1
GND
ALERT/THERM2
8
Diode-connected configuration(1)
(2)
RS
:
(3)
(2)
CDIFF
RS
(1) Diode-connected configuration provides better settling time. Transistor-connected configuration provides better series
resistance cancellation.
(2) RS (optional) should be < 1kΩ in most applications. Selection of RS depends on specific application; see Filtering
section.
(3) CDIFF (optional) should be < 2200pF in most applications. Selection of CDIFF depends on specific application; see
Filtering section and Figure 9, Remote Temperature Error vs Differential Capacitance.
Figure 13. TMP435 Basic Connections
10
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