JFET op-amp with 45 V/µs slew rate — signal-chain fit
The PM356AJ is a single-channel JFET-input operational amplifier in a TO-99-8 metal can package. Its 20 MHz gain-bandwidth product and 45 V/µs slew rate suit it for fast-settling applications such as ADC front-ends, pulse amplifiers, and active filters where large-signal bandwidth matters. The 44 V supply span (e.g., ±22 V) provides headroom for ±10 V or ±15 V signal swings common in precision analog designs.
44 V supply span — single-rail or split-rail flexibility
The supply span is specified at both minimum and maximum as 44 V, which implies a fixed ±22 V or 44 V single-rail design rather than a wide-range regulator. This is typical for older JFET op-amps intended for ±15 V or ±18 V supplies. Designers should confirm the supply rails match this exact span; the part will not operate from a 5 V or 12 V single supply. The 5 mA supply current is modest for a 20 MHz GBW device, keeping thermal dissipation manageable in the TO-99 can.
TO-99 metal can — hermetic package for harsh environments
The TO-99-8 metal can is a hermetic, through-hole package. It offers better environmental sealing than plastic DIP or SOIC, making it a candidate for high-reliability, military, or aerospace applications where moisture and contaminant resistance are required. Through-hole mounting adds assembly cost and board space versus surface-mount alternatives.
This is a stable BOM line for designs that require the TO-99 package and JFET input stage.