Precision 5V Reference: LT1085 vs LM317

In summary, LT1085 and LM317 are two voltage regulators with different precision and current ratings. LT1085 has a tighter output voltage tolerance of ±1% and a higher maximum output current rating of 3A, making it better for precision applications. It also has a lower temperature coefficient and additional features such as built-in thermal shutdown and lower dropout voltage. However, these features make it more expensive compared to LM317. Overall, LT1085 is a better option for precision applications but may come at a higher cost.
  • #1
prescott2006
25
0
Anyone can suggest a very precise and constant 5V reference? I Google and see many are recommend LT1085 and LM317? Which one is better? Any better recommendation?
 
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  • #2
Go to the Digikey website.
 

FAQ: Precision 5V Reference: LT1085 vs LM317

What is the difference between LT1085 and LM317?

The main difference between LT1085 and LM317 is the precision of their output voltage. LT1085 has a tighter tolerance of ±1% compared to LM317's tolerance of ±2.2%. This means that LT1085 will have a more accurate and stable output voltage compared to LM317.

Which one is better for precision applications?

LT1085 is better for precision applications due to its tighter output voltage tolerance. It also has a lower temperature coefficient, meaning its output voltage is less affected by changes in temperature.

How do their current ratings compare?

LT1085 has a higher maximum output current rating of 3A compared to LM317's maximum rating of 1.5A. This means that LT1085 can provide more current to a load without overheating.

Are there any other differences between these two references?

Yes, there are a few other differences between LT1085 and LM317. LT1085 has a built-in thermal shutdown feature to prevent damage from overheating, while LM317 does not. LT1085 also has a lower dropout voltage, which means it can regulate lower input voltages compared to LM317.

Which one is more expensive?

In general, LT1085 is more expensive than LM317 due to its higher precision and additional features. However, the prices may vary depending on the manufacturer and quantity purchased.

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