Time (s)

-1

1

3

5

7

9

11

13

15

17

19

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

Device

SCL

SDA

GND

V+

ALERT

ADD0

C

(F)

10 nF

≥

R

(F)

5 k

≤

Supply Voltage

23

TMP112

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SBOS473F – MARCH 2009 – REVISED FEBRUARY 2018

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Typical Application (continued)

The TMP112 family is a very low-power device and generates very low noise on the supply bus. Applying an RC

filter to the V+ pin of the TMP112 family can further reduce any noise that the device might propagate to other

Figure 18. Noise Reduction Techniques

8.2.3 Application Curves

Figure 19 shows the step response of the TMP112 family 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 family is mounted. For this test,

the TMP112 family was soldered to a two-layer PCB that measured 0.375 inches × 0.437 inches.

Figure 19. Temperature Step Response

9 Power Supply Recommendations

The TMP112 family 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 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.