Tool/software:
Hi team,
I have a customer asking for a cross from the ADI MAX44250AUK+T (see datasheet here) with the key parameters being low offset voltage and offset current, GBW product, and 3.3V supply. I recommended the drop-ins OPA182 and OPA189 as they're drop-in but the supply voltage didn't match since those two parts have 4.5V minimum.
Any thoughts here? Thanks in advance!
Marco
Hi Marco,
I recommended the drop-ins OPA182 and OPA189 as they're drop-in but the supply voltage didn't match since those two parts have 4.5V minimum.
The cross reference app recommends to use OPA182 and/or OPA189 as the p2p replacement, please see the link below.
https://www.ti.com/cross-reference-search/singlepart?searchTerm=MAX44250
If you have other questions, please let us know.
Best,
Raymond
HVA Application Team
Hi Raymond,
The customer says their supply voltage is 3.3V, which aligns with the MAX44250 datasheet claiming a minimum VDD of 2.7V and the OPA182/9 supply voltages having a minimum of 4.5V. I want to know if there's something that would better fit the customer's power supply needs from our op-amp portfolio. Let me know if what I'm saying doesn't make sense
Marco
Hi Marco,
Thanks for Clemens comments!
Here is the precision op amp selection. For instance, many of 5.5V op amp has lower supply rail down to 1.8Vdc, 2.2Vdc or 2.7Vdc. However, it depends on what are the key operating parameters for the application. It is compromise when selecting these since the customer is using 3.3Vdc as the single supply rail.
BTW, the 5.5Vdc op amps (precision type) is now supported by LVAC team in Santa Clara, CA. I can transfer you there if you want to narrow down the options. For instance, OPA388 looks pretty good, but it depends on the customer's actual application.
Please let me know if you have other questions.
Best,
Raymond
