What this CMOS op-amp does — and the selection trap it avoids
The ICL7614DCPA is a single CMOS operational amplifier from Intersil (now Renesas) that draws only 1 mA supply current while delivering a 1.4 MHz gain-bandwidth product and a 1.6 V/µs slew rate. The 1 pA typical input bias current is the headline number that makes this part the right call for photodiode amplifiers, pH probe buffers, and other high-impedance sensor interfaces where a bipolar op-amp's nanoamp bias would swamp the signal.
The supply span runs from 2 V to 16 V, so it works on a single lithium cell, a 5 V logic rail, or a 12 V industrial bus. For automotive or outdoor telecom you would need the extended-temperature variant (ICL7614BCPA, -40°C to +85°C).
Package and lifecycle — through-hole still has a place
Housed in an 8-pin DIP (0.300" width, 7.62 mm pitch), this part is through-hole only. That suits prototyping, breadboard work, and legacy BOMs where a DIP socket is already stencilled. The product status is Active, so there is no near-term EOL pressure — still a valid design-in for new builds that do not demand a smaller footprint. RoHS non-compliant, so verify your assembly's lead-free exemption or plan for a leaded solder process.