4.5-digit resolution on a single supply
The ICL7129ACPL+2 is a 4.5-digit display driver from Analog Devices, built for panel-mount instruments that need a direct LCD readout without an external microcontroller. The 4.5-digit resolution means it resolves down to 1 count in ±20,000 — enough for a 4½-digit DVM or a precision panel meter where the last digit matters. It runs from a single 6V to 14V supply, so it can share a common 9V or 12V rail in a benchtop instrument without a separate negative converter. The 40-pin PDIP package is a through-hole footprint — hand-solderable and socket-friendly for prototyping or low-volume production.
Active production, ROHS3 compliant
For a kitting lead or BOM engineer, this means the part is safe to specify for a new design without worrying about a last-time-buy window.
Single-channel driver in a 40-DIP
One channel drives a single 4.5-digit LCD display. The supply source is single-supply, which simplifies the power rail — no need for a -5V rail just for the display driver. The 40-DIP (0.600" row spacing) is a standard breadboard-compatible footprint. Packaged in a tube — the typical through-hole shipping format. For a contract manufacturer, the tube feeds into standard DIP insertion equipment without a reel change.