Operations on doubles with very unexpected results

Hi all,

I am stumped with an issue that looks trivial but apparently isn't really ?

This code... :

double TMP117ConvertTemperatureToCelsius(uint16_t temperature) {
	double temp_double = (double)temperature;
	double multiplied = (double)temp_double * 7.8125f;
	double converted = (double)multiplied / 1000.0f;
	return (converted);
}

Gives with the debugger :

- temperature (uint16_t) =2627 (correct)

- temp_double (double) = 2627 (correct)

- multiplied (double) = 20523.4375 (correct)

- converted (double) = 0 (???)

And this code... :

double TMP117ConvertTemperatureToCelsius(uint16_t temperature) {
	double temp_double = (double)temperature;
	double converted = (double)temp_double * 0.0078125f;
	return (converted);
}

gives :

- temperature (uint16_t) =2626 (correct)

- temp_double (double) = 2626 (correct)

- converted (double) = 3.0981138548092976e-312 (?????)

Have I overlooked something really basic or is something very wrong ? This is a question I never thought I'd ask but oh well :grinning_face_with_sweat:

Thanks in advance !