Micropower quad op-amp for low-frequency signal chains
The 100 kHz gain-bandwidth product and 0.05 V/µs slew rate define its territory: DC and low-frequency signal conditioning — thermocouple amplifiers, strain-gauge bridges, battery voltage monitoring, and similar sub-audio analog processing. The supply span from 3 V to 32 V covers single 5 V logic rails, 12 V industrial buses, and 24 V battery systems without needing a secondary regulator.
With a slew rate of 0.05 V/µs and gain-bandwidth product of 100 kHz, this part is squarely in the micropower, low-frequency class. For a 1 V peak output swing, the maximum undistorted frequency is roughly 8 kHz — fine for DC sensor outputs or low-speed telemetry, but not for audio line-level signals or switching amplifier loops. The 2 mV input offset voltage and 2 nA input bias current are adequate for general-purpose conditioning of millivolt-level signals from resistive bridges or thermocouples, though a precision amplifier would be needed for microvolt-level measurements.
The 3 V minimum supply lets this quad op-amp run directly from a single lithium cell or a 3.3 V regulated rail, while the 32 V maximum allows operation on 24 V industrial supplies with headroom. The 14-TSSOP package keeps the board footprint small for multi-channel designs, and the surface-mount mounting suits automated assembly.
Lifecycle and sourcing posture
It is ROHS3 compliant. There is no official TI successor listed for this exact order code, but the LP324 family is broadly second-sourced by multiple manufacturers — the standard LM324 pinout is compatible, though the LP324's micropower supply current (85 µA versus roughly 500 µA for the LM324) is the key differentiator.