Active production, TO-99-8 metal can differential amplifier
The INA105AM-BB is a precision differential amplifier from Texas Instruments in the hermetic TO-99-8 metal can package. It is a single-function op amp with a maximum input offset voltage of 250 µV, designed for applications requiring accurate difference-signal amplification — think bridge sensors, current-sense, or line-receiver stages where common-mode rejection matters. The through-hole TO-99-8 package is a classic hermetic metal can, still preferred in high-reliability, low-volume, or retrofit designs where board-level rework is common.
Package and mounting
The 250 µV maximum offset is the headline spec for this part. In a precision difference amplifier, that offset directly limits the smallest differential signal you can resolve before the error term dominates. For a 10 mV full-scale sensor output, 250 µV represents 2.5% error at the null — acceptable for many industrial and instrumentation loops, but you will want to budget for it in the gain stage. The offset is a max, not a typical, so the spread across units is bounded; you can trim it externally if the application demands sub-100 µV performance. The TO-99-8 metal can provides better thermal stability than plastic packages, so the offset drift with temperature stays tighter — a real advantage in environments where the board sees a wide temperature swing.
Sourcing and lifecycle
There is no official second-source or pin-compatible alternate listed in the record, so for dual-sourcing you would need to evaluate functionally equivalent differential amplifiers in the same package — but the TO-99-8 footprint is specific enough that a drop-in is not guaranteed without a full qualification.