Contents
What is ppm degree C?
It is usually expressed in ppm/°C (parts per million per degree Centigrade) units. That means its resistance will not change more than 0.000020 ohms (20.1,000,000) per ohm per degree Centigrade temperature change (within the rated temperature range of -55 to +145°C, measured from 25°C room temperature.)
What does tempco mean?
temperature coefficient
The temperature coefficient (tempco) of a voltage reference allows us to characterize the temperature-induced errors in the reference output. The common method (definition) for calculating the temperature coefficient is the “Box method”.
What is ppm k?
5ppm/K means that the resistance will change by 5 parts per million per 1 Kelvin change in temperature. The datasheet for your resistor should give the baseline temperature, but it’s probably 20C (roughly 293K).
What is Tempco value?
Calculating Temperature Coefficient (Tempco) and Initial Accuracy for Voltage References. Abstract: The primary purpose of a voltage reference (VREF) is to establish system accuracy. A 12-bit ADC with 4.096V full-scale input, for example, gives bit values of 4.096 / (212 = 4096) = 1mV.
Is higher or lower ppm better?
PPM refers to a unit of concentration, parts per million. It’s a way to quantify very low concentrations of substances. 1 ppm is equivalent to 1 milligram per liter, or 0.0001% concentration. But when it comes to silver, a smaller amount of total silver (PPM) can actually have more beneficial bio-active silver.
How is the solute concentration of a ppm calculated?
Chemical concentration. ppm is used to measure chemical concentration, usually in a solution of water. Solute concentration of 1 ppm is solute concentration of 1/1000000 of the solution. The concentration C in ppm is calculated from the solute mass m solute in milligrams and the solution mass m solution in milligrams .
What is the concentration of carbon dioxide in ppm?
The concentration C in ppm is also equal to the solute mass msolute in milligrams (mg) divided by the water solution volume Vsolution in liters (l): The concentration of carbon dioxide (CO 2) in the atmosphere is about 388ppm. The frequency stability of an electronic oscillator component can be measured in ppm.
What does the ppm / K of a resistor mean?
5ppm/K means that the resistance will change by 5 parts per million per 1 Kelvin change in temperature. The datasheet for your resistor should give the baseline temperature, but it’s probably 20C (roughly 293K). So, if the temperature of your resistor is actually 300K (27C) then it’s resistance will be 10 * (1 + (7 * 0.000005)) = 10.00035R.
What does 5 5 ppm / K correspond to?
5 5ppm/K means that the resistance will change by 5 parts per million per 1 Kelvin change in temperature. The datasheet for your resistor should give the baseline temperature, but it’s probably 20C (roughly 293K). So, if the temperature of your resistor is actually 300K (27C) then it’s resistance will be 10 * (1 + (7 * 0.000005)) = 10.00035R.