110 kHz gain-bandwidth — micropower quad op-amp for low-frequency signal chains
The Texas Instruments TLC27L4ACD is a CMOS quad operational amplifier from the LinCMOS™ series, designed for applications where power consumption is the primary constraint. The total supply current of 57 µA across all four amplifiers makes it a strong candidate for battery-powered instrumentation, portable medical devices, or loop-powered 4-20 mA transmitters where every microamp counts. The input bias current of 0.7 pA allows direct connection to high-impedance sources like photodiodes or pH electrodes without an external buffer, preserving signal integrity in low-level measurements.
The TLC27L4ACD operates from a single supply spanning 3 V to 16 V, covering common 3.3 V, 5 V, and 12 V rails without a separate negative supply. The 1.1 mV typical input offset voltage is adequate for general-purpose sensing; if tighter offset is needed, the precision-grade TLC27L4B variant is worth evaluating.
For extended temperature requirements, the TLC27L4AID (industrial grade, -40°C to 125°C) is the same die in the same package.