TMP112_15 Datasheet, PDF (26/35 Pages) Texas Instruments – TMP112 High-Accuracy, Low-Power, Digital Temperature Sensor With SMBus and Two-Wire Serial Interface in SOT563

TMP112
SBOS473E – MARCH 2009 – REVISED DECEMBER 2015
Typical Application (continued)
Supply Voltage
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Device
SCL
SDA
GND
V+
ALERT ADD0
R_(F) ≤ 5 kΩ
C_(F) ≥ 10 nF
Figure 20. Noise Reduction Techniques
8.2.3 Application Curves
Figure 21 shows the step response of the TMP112 device to a submersion in an oil bath of 100ºC from room
temperature (27ºC). The time-constant, or the time for the output to reach 63% of the input step, is 0.8 s. The
time-constant result depends on the printed circuit board (PCB) that the TMP112 device is mounted. For this test,
the TMP112 device was soldered to a two-layer PCB that measured 0.375 in × 0.437 in.
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
-1 1 3 5 7 9 11 13 15 17 19
Time (s)
Figure 21. Temperature Step Response
9 Power Supply Recommendations
The TMP112 device operates with power supply in the range of 1.4 to 3.6 V. The device is optimized for
operation at 3.3-V supply but can measure temperature accurately in the full supply range. Refer to the Power
Supply-Level Contribution to Accuracy section for more information about the power supply impact on the
accuracy of the device.
A power-supply bypass capacitor is required for proper operation. Place this capacitor as close as possible to the
supply and ground pins of the device. A typical value for this supply bypass capacitor is 0.01 μF. Applications
with noisy or high-impedance power supplies may require additional decoupling capacitors to reject power-supply
noise.
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