LT1167
Production
The LT1167 is a low power, precision instrumentation amplifier that requires only one external resistor to set gains of 1 to 10,000. The low voltage noise...
Datasheet
LT1167 on Analog.com
Can you provide the thermal resistance values for LT1167 Thermal Data (8-Lead SOIC)?
I was able to locate the junction to ambient in the datasheet, but not the other values.
Product Page: https://www.analog.com/en/products/lt1167.html
Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/1167fc.pdf
8-Lead SOIC Drawing: https://mds.analog.com/api/public/content/05081610_G_SO8.pdf
I am surprised by how high that thetaJB value is. It is not common for a thetaJB value to exceed the thetaJA value for any package type, regardless of whether or not it should be top/bottom cooled.
Since the datasheet was from linear tech (which I understand was acquired by analog), I took a peek at this old linear tech pdf of estiamted thetaJA/JC values for various package types. A section of that is copied as an image below. A thetaJB of 236.84 C/W exceeds the approximate thetaJA values from this old reference file too.
I am surprised by how high that thetaJB value is. It is not common for a thetaJB value to exceed the thetaJA value for any package type, regardless of whether or not it should be top/bottom cooled.
Since the datasheet was from linear tech (which I understand was acquired by analog), I took a peek at this old linear tech pdf of estiamted thetaJA/JC values for various package types. A section of that is copied as an image below. A thetaJB of 236.84 C/W exceeds the approximate thetaJA values from this old reference file too.
