Place a 0.1µF ceramic capacitor as close as possible between V+ and GND. For dual supplies, also add a 0.1µF between V- and GND. Add a 10µF bulk tantalum capacitor somewhere on the board.
While the datasheet gives you the numbers, here is practical advice: tsc-407 datasheet
i2c_start();
i2c_write(DEVICE_ADDR << 1 | I2C_WRITE);
i2c_write(TEMP_REG);
i2c_start(); // repeated start
i2c_write(DEVICE_ADDR << 1 | I2C_READ);
msb = i2c_read_ack();
lsb = i2c_read_nack();
i2c_stop();
temp = convert_raw_to_celsius(msb, lsb);
If you don't use all four SPDT sections, tie the unused logic input to GND or V+, and leave the analog pins floating or connect to GND. Do not leave logic inputs unconnected—they can oscillate. Place a 0
To use the TSC-407, designers typically connect it to a microcontroller (MCU) as follows: If you don't use all four SPDT sections,
