Greetings,
I am a fairly new to electronics, and recently I purchased a LMP91000 EVM to perform cyclic voltammetry using Arduino for my mini-project.
And I am using LMP91000 Arduino library from one of the github repository.
First, I wanted to measure temperature of EVM, so I connected SPIO-GPSI16 as followings:
- pin 13 (+3.3V) --> +3.3V pin of Arduino
- pin 11 (SDA) --> A4
- pin 12(SDL) --> A5
- pin 2 (GND) --> GND pin
- pin 2-3 of JMENB is shorted
- Vout test pad to A0
In Arduino IDE, I configured LMP91000's setting via I2C as default values except that operation mode is set to TIA ON.
If I understood datasheet correctly, when TIA is on, then Vout corresponds to temperature signal (voltage).
However, when I uploaded the code to Arduino, I am reading a random value such as 400, 376, 600, etc. (This is not in range of output voltage of temperature...)
Question
Is there something wrong with these configurations? or
Am I supposed to use SPI to acquire data using ADC embedded in the evaluation board?