• Ambient temperature sensor with up to 12-bit resolution
• Typical accuracy of ±1 °C
• Programmable temperature alert pin
• Multiple jumpers for eight selectable addresses
• 30 ms to 240 ms typical conversion times

The Digilent PmodTMP3 is a temperature sensor built around the Microchip TCN75AVUA.

Functional Description

The PmodTMP3 uses an 8-pin connector that allows for communication via I2C and provides pins to daisy-chain the PmodTMP3 to other I2C devices. The PmodTMP3 also provides three 3-pin headers for selecting the I2C address of the chip, and one 2-pin header for controlling external devices based upon temperature thresholds defined by the user in software. Temperature data measured by the device is formatted in two’s compliment and may be programmed for a resolution of 9-bits to 12-bits through the configuration register on the TCN75AVUA.

Interfacing with the Pmod

The Pmod TMP3 communicates with the host board via the I2C protocol. Users may select one of 8 different I2C slave addresses ranging from 0x48 to 0x4F by adjusting the jumpers JP1, JP2, and JP3 to either be at a digital '1' (3.3V) or a digital '0' (GND).

Any external power applied to the Pmod must be within 2.5V and 5.5V; however, it is recommended that Pmod is operated at 3.3V.

Physical Dimensions

The pins on the pin header are spaced 100 mil apart. The PCB is 1 inch long and 0.8 inches wide.