LM124AJ

The LM124AJ from Texas Instruments is a low-power, quad operational amplifier featuring internal frequency compensation for unity gain. It is designed to operate from a single power supply over a wide voltage range, from 3V to 32V, or from dual supplies of ±1.5V to ±16V. This makes it suitable for applications that traditionally required dual supplies, such as interfacing with digital systems using a standard 5V supply.

Key electrical characteristics include a large DC voltage gain of 100 dB, a unity gain bandwidth of 1 MHz, and a low supply current drain of 700 µA, which is largely independent of the supply voltage. The input common-mode voltage range includes ground, and the output voltage can swing to ground when operated from a single supply. It also features a low input bias current of 45 nA and a low input offset voltage of 2 mV.

The LM124AJ is rated for military operating temperatures from -55°C to 125°C. It is available in multiple package types, including 14-pin CDIP, 14-pin CFP, and 20-pin LCCC, suitable for through-hole mounting.

This operational amplifier is well-suited for transducer amplifiers, DC gain blocks, and other conventional op-amp circuits where single-supply operation is advantageous. Its design allows for direct sensing near ground, and its output can also swing to ground.