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TMP75C

SBOS707B – APRIL 2014 – REVISED AUGUST 2014

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Typical Application (continued)

8.2.1 Design Requirements

The TMP75C only requires pull-up resistors on SDA and ALERT, although a pull-up resistor is typically present

on the SCL as well. A 0.01-

μF bypass capacitor on the supply is recommended, as shown in Figure 18. The

8.2.2 Detailed Design Procedure

The TMP75C should be placed in close proximity to the heat source to be monitored, with a proper layout for

good thermal coupling. This ensures that temperature changes are captured within the shortest possible time

interval.

8.2.3 Application Curves

Figure 19 shows the step response of the TMP75C to a submersion in an oil bath of 100°C from room

temperature (27°C). The time-constant, or the time for the output to reach 63% of the input step, is 1.5 seconds.

Figure 19. Temperature Step Response

9 Power Supply Recommendations

The TMP75C operates with a power supply in the range of 1.4 V to 3.6 V. It is optimized for operation at 1.8-V

supply but can measure temperature accurately in the full supply range.

A power-supply bypass capacitor is required for stability; 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.

20

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