Electronics > Metrology
REF70 new from TI
fcb:
Just came across this:
https://www.ti.com/product/REF70
Grandchuck:
It is in a ceramic package. The typical drift is 28 ppm from 0 to 1000 hours. The REF70 will experience the highest drift in the
initial 1000 hr. Subsequent deviation is typically lower than 13 ppm for the next 1000 hrs.
kleiner Rainer:
There is also a new application note on long term drift:
https://www.ti.com/lit/pdf/sbaa436
Greetings,
Rainer
Andreas:
--- Quote from: Grandchuck on April 22, 2021, 11:38:44 am ---It is in a ceramic package.
--- End quote ---
Hello,
it is pin-compatible to the LTC6655. And the data is also copied from the LT datasheet except for the supply voltage range which is better for the REF7025.
The large question is: how sensitive is the chip in the SMD package to FR4 board stress due to humidity.
With other LS8-packages (LT1236, LTC6655) I have always had not so good results as with CERDIP 8 packages. (AD586LQ)
with best regards
Andreas
ch_scr:
--- Quote from: Andreas on April 22, 2021, 06:13:16 pm ---
--- Quote from: Grandchuck on April 22, 2021, 11:38:44 am ---It is in a ceramic package.
--- End quote ---
Hello,
it is pin-compatible to the LTC6655. And the data is also copied from the LT datasheet except for the supply voltage range which is better for the REF7025.
The large question is: how sensitive is the chip in the SMD package to FR4 board stress due to humidity.
With other LS8-packages (LT1236, LTC6655) I have always had not so good results as with CERDIP 8 packages. (AD586LQ)
with best regards
Andreas
--- End quote ---
Hmm, shooting from the hip but: flex pcb interposer between LS8 and rest of the FR4 PCB?
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