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What does M-Grade, B-Grade,L-Grade,T-Grade refer to

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It is explained in the fist page of the datasheet

Laser trimmed to high accuracy
5.000 V ±2.0 mV (M grade)

Trimmed temperature coefficient
2 ppm/°C max, 0°C to 70°C (M grade)
5 ppm/°C max, −40°C to +85°C (B and L grades)
10 ppm/°C max, −55°C to +125°C (T grade)

the reference voltage will change 2, 5, 10 parts per million per degree Celsius depending on the grade (in the specified temperature range)
for 5v the 1ppm is equivalent to 5µV (5v/1000000)

Alex
 
If you look further in the datasheet, you will notice a suffix to the AD586 part number, M, B, etc. The specifications for each grade/version are give there.

John
 
Oh right. I read it in a different way (guessing M for mil standards and wondering what other alphabets were)

Thanks a lot Alex and John
 

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