10.1 Layout Guidelines
Mount the TMP275 to a PCB as shown in Figure 20. For this example the A0, A1, and A2 address pins are connected directly to ground. Connecting these pins to ground configures the device for slave address 1001000b.
- Bypass the VS pin to ground with a low-ESR ceramic bypass-capacitor. The typical recommended bypass capacitance is a 0.1-μF ceramic capacitor with a X5R or X7R dielectric. The optimum placement is closest to the VS and GND pins of the device. Take care in minimizing the loop area formed by the bypass-capacitor connection, the VS pin, and the GND pin of the IC. Additional bypass capacitance can be added to compensate for noisy or high-impedance power supplies.
- Pull up the open-drain output pins SDA , SCL and ALERT through 5-kΩ pullup resistors.