9.4 Power Supply Recommendations

The TMP110 operates with power supply in the range of 1.14 V to 5.5 V. The device can measure temperature

accurately in the full supply range. 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 0.1 μF. Applications with noisy or high-impedance power supplies can require additional decoupling

capacitors to reject power-supply noise.

9.5 Layout

9.5.1 Layout Guidelines

The TMP110 is a simple device to layout. Place the power supply bypass capacitor as close to the device as

possible. Pull up the open-drain output pin SDA through RPULLUP pullup resistor.

For devices where the 5th pin is ADD0, the pin can easily be connected to one of the 4 edge pins for setting

the device address as shown in Figure 9-3. For devices where the 5th pin is ALERT, a 4 mil trace can be routed

between pins 1 and 5 or pins 2 and 4 as shown in Figure 9-4.

9.5.2 Layout Example

There are special considerations that need to be taken for the TMP110 X2SON package. These considerations

are due to the center pad being electrically connected to either address or alert (depending on the orderables

shown in Table 7-8) and because of the dimensions of the package and the pads. With the address option, the

center pad can be directly connected with a trace on the same layer to the desired pin of the device as shown in

Figure 9-3.

5

2

4

1

3

0.1 µF

RPULLUP

RPULLUP

Via to Power Plane

Via to Ground Plane

Figure 9-3. ADD0 Pin Layout Example

5

2

4

1

3

0.1 µF

RPULLUP

RPULLUP

Via to Power Plane

Via to Ground Plane

RPULLUP

Figure 9-4. ALERT Pin Layout Example

TMP110

SNIS233 – FEBRUARY 2024

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