J-FET input stage — why it matters for your signal chain
The TL031CD is a single J-FET input op-amp from Texas Instruments. The J-FET front end gives you an input bias current of 2 pA and an input offset voltage of 500 µV, which means it won't load down high-impedance sources like photodiode or piezoelectric sensors. The gain-bandwidth product sits at 1.1 MHz with a 5.1 V/µs slew rate — fine for audio-band filtering, low-speed data acquisition, or general-purpose signal conditioning where you need the low drift of a FET input without paying for a higher-speed part.
Supply range and temperature — where this part lives
Runs on a single supply from 10 V up to 30 V, or split supplies like ±5 V to ±15 V. That 10 V minimum means you can't run it off a 5 V rail — plan your power architecture accordingly. Not rated for the engine bay or a rooftop telecom cabinet.
Package and mounting
Ships in a tube, which is typical for smaller quantities — if you're feeding a pick-and-place line, you'll want to confirm the tube-to-tape conversion or order a tape-and-reel variant if one exists. The supplier device package is 8-SOIC.
Lifecycle and compliance
Listed as Active in production, so no end-of-life notice to chase. ROHS3 compliant — no exemptions to track for EU shipments.