Quad JFET op-amp with rail-to-rail output for multi-channel signal conditioning
The AD824ARZ-14-REEL7 is a quad JFET-input operational amplifier from Analog Devices, packing four independent amplifiers into a 14-SOIC package. Each channel delivers a 2 MHz gain-bandwidth product and a 2 V/µs slew rate, making it suitable for multi-channel sensor conditioning, active filters, and data-acquisition front ends where moderate speed and low bias current matter. Input bias current is just 4 pA, so high-impedance sources like photodiodes or pH probes see negligible loading. Supply current per amplifier is 560 µA, keeping the total quiescent draw under 2.3 mA for all four channels — a reasonable trade-off for a precision quad part in a compact SOIC footprint.
The 2 V/µs slew rate and 2 MHz gain-bandwidth product set the practical upper frequency for full-amplitude signals. Input bias current is 4 pA.
The AD824ARZ-14-REEL7 operates from a single supply as low as 3 V up to 30 V, or from split supplies like ±1.5 V to ±15 V. The rail-to-rail output stage can source or sink 12 mA per channel, which is enough to drive a typical ADC input, a reference buffer, or a small headphone load. Input offset voltage is specified at 500 µV, adequate for general-purpose precision work but not the lowest in the JFET class.
For smaller quantities, the Cut Tape option is also available.