The Intersil ICL7622DMJD is a CMOS dual operational amplifier with rail-to-rail output, packaged in a 14-lead ceramic CDIP (0.300" body width). Typical applications include precision signal conditioning in avionics instrumentation, satellite telemetry, missile guidance electronics, and downhole sensor interfaces where commercial plastic packages are not acceptable.
1.4 MHz gain bandwidth and 1.6 V/µs slew rate — adequate for low-frequency precision paths
The gain-bandwidth product of 1.4 MHz and slew rate of 1.6 V/µs place this part in the low-to-moderate speed tier. No one is selecting the ICL7622DMJD for video or high-speed data acquisition. Instead, these ratings are well matched to DC and low-frequency AC signal chains — thermocouple amplifiers, strain-gauge bridges, pressure-transducer buffers, and 4-20 mA loop conditioning — where the design priority is precision and stability, not bandwidth.
1 pA input bias current — the spec that matters for high-impedance sources
With a typical input bias current of 1 pA, this CMOS amplifier introduces negligible DC error when interfacing to high-output-impedance sensors such as photodiodes, pH probes, or piezoelectric accelerometers. The 15 mV input offset voltage is relaxed compared to precision bipolar op-amps, but the bias current floor is what makes the part viable for applications where the source impedance exceeds 1 MΩ. The 2 V to 16 V supply span means it can run on a single 3.3 V rail or split ±5 V supplies without issue.
Hermetic 14-CDIP — package drives the procurement decision
The 14-CDIP (0.300", 7.62 mm) ceramic dual-in-line package is the defining physical attribute for this part. It is not a commercial plastic DIP — the ceramic body and hermetic seal are required for high-reliability programs (MIL-STD-883, space-level screening) and for environments with moisture, outgassing, or vacuum exposure. The through-hole mounting suits legacy board designs, breadboard prototyping, and hand-assembled prototype or repair runs. The supplier device package is 14-CDIP, identical to the package/case field.
For a military-temperature hermetic part, that is notable — many CDIP-packaged linear parts have moved to NRND or EOL as wafer fabs consolidate.