Single-supply or ±15 V — the 30 V supply span defines the rail budget
The OP77GS-REEL is a single-channel general-purpose op amp from Analog Devices in an 8-SOIC package. Both the minimum and maximum supply span are listed at 30 V, which means the part can run from a single 30 V rail or from ±15 V dual supplies. The output is differential, so this is not a standard single-ended op amp — the signal appears across the two output pins, which matters for the downstream ADC or comparator input stage.
Temperature range — -25°C minimum limits cold-environment deployment
The ADA4004-1ARZ and ADA4077-1ARZ-R7 both cover -40°C to 125°C. If your system sees -40°C startup or continuous cold operation, the OP77GS-REEL is not the right fit — the narrower range rules out outdoor telecom cabinets, engine bay electronics, and cold-storage environments.
RoHS non-compliant — regulatory gate for EU-market builds
The OP77GS-REEL is listed as RoHS non-compliant. This is a hard stop for any BOM that must ship into RoHS-regulated regions (EU, UK, California) unless an exemption applies. For RoHS-compliant builds, the ADA4077-1ARZ-R7 is a general-purpose alternative in the same 8-SOIC footprint.
Bulk packaging — no reel, no tape; plan for hand-load or tube transfer
The listing shows the package form as Bulk, not Tape & Reel. Bulk means loose parts in a bag or tube — no carrier tape for automated pick-and-place. If your line runs reel-fed assembly, you will need to transfer the parts to a tube or tray for the feeder, or hand-place them. Factor this into the kitting and placement cost.