AD518JH — a fast general-purpose op-amp in a hermetic TO-99 can
Its headline ratings — 12 MHz gain-bandwidth product and 70 V/µs slew rate — place it in the fast general-purpose class, suited for signal conditioning, active filters, and high-speed buffer stages where the 120 nA input bias current and 2 mV input offset voltage are acceptable. The 5 µA supply current is unusually low for a 12 MHz amplifier, making it an interesting choice for power-sensitive designs that still need speed.
Hermetic TO-99 and military temperature range
The TO-99-8 metal can is a hermetic package — it seals the die against moisture and contaminants, which matters for high-reliability environments like avionics, satellite payloads, or downhole instrumentation. This is not a commercial-grade part; the buyer should expect the price and sourcing to reflect the screened-level pedigree.
RoHS non-compliance — a BOM gate
The AD518JH is listed as RoHS non-compliant. This is a critical flag for any design targeting RoHS exemption-free markets (EU, California, many consumer-electronics supply chains). The lead-bearing finish is typical of legacy hermetic packages, and some defence/aerospace contracts explicitly require it for tin-whisker mitigation. If your BOM mandates RoHS compliance, this part will not pass the gate — you would need to look at a compliant alternative such as the ADA4004-1ARZ (surface-mount, RoHS, but only 2.7 V/µs slew rate).
However, the through-hole TO-99 package and RoHS non-compliance mean it is a niche part — not a high-volume automated line item. The date-code and marking should be verified against the manufacturer's known etch format for this package — the TO-99 lid laser marking is a common target for counterfeit re-marking.