TMP116: Can't get the TMP116 to acknowledge on the I2C

Hi Dear support team :)

I'm currently trying to do a use-case specific evaluation of the TMP116 to evaluate optimal placement in addition to mounting dependent behavior as the EVM and datasheet looks nice for our use-case.

To get a quick setup I'm using the Arduino Uno. But I can't seem to get the sensor to acknowledge even when using the official i2c_scanner script, which runs through all i2C addresses.

I've tried to reduce the communication speed to 31kHz, from the default 100kHz, and the signals look nice, except i do not receive an ack from the TMP116. I measure a approx 0.66V diode drop from gnd to all pins, no shorts between the pins and a 4.1V on the Arduino 3.3V output.

Am I missing something obvious?

Setup:

Arduino Uno -> TMP116:

* Pin A5 -> Pin 1 -> 4.7kOhm -> 3.3V (Arduino)

* Pin A4 -> Pin 6 -> 4.7kOhm -> 3.3V (Arduino)

* 3.3V (Arduino) -> Pin 4&5 -> 100nF cap to GND (sensor)

* GND (Arduino) -> Pin 2

* NC -> Pin 3

* NC -> Thermal pad

Connections consist of approximately 15cm test leads, vero board and 4-5cm lakker insulated cobber wire soldered directly onto the free hanging IC (with 100nF cap on it with 3-5mm wire to pins)

Code:

#include <Wire.h>
void setup()
{
  Wire.begin();
  Wire.setClock(31000L);
  Serial.begin(9600);
  while (!Serial);             
    Serial.println("\nI2C Scanner");
}
void loop()
{
  byte error, address;
  int nDevices;
  Serial.println("Scanning...");
  nDevices = 0;
  address=0;
  for(address = 1; address < 127; address++ ) 
  {
    // The i2c_scanner uses the return value of
    // the Write.endTransmisstion to see if
    // a device did acknowledge to the address.
    Wire.beginTransmission(address);
    error = Wire.endTransmission();
    if (error == 0)
    {
      Serial.print("I2C device found at address 0x");
        if (address<16) 
          Serial.print("0");
      Serial.print(address,HEX);
      Serial.println("  !");
      nDevices++;
    }
    else if (error==4) 
    {
      Serial.print("Unknown error at address 0x");
      if (address<16) 
        Serial.print("0");
      Serial.println(address,HEX);
    }    
  }
  if (nDevices == 0)
    Serial.println("No I2C devices found\n");
  else
    Serial.println("done\n");
  delay(5000);           // wait 5 seconds for next scan
}

Best Regards

A confused green engineer :)