ADA4077-1ARMZ-RL

Overview

The ADA4077-1ARMZ-RL is a single-channel high-precision operational amplifier from Analog Devices, housed in an 8-lead MSOP package. It operates within a supply voltage range of ±2.5 V to ±15 V and functions across an extended industrial temperature range of −40°C to +125°C. Key electrical specifications include a maximum offset voltage of 90 µV at 25°C (A grade) and a maximum drift of 1.2 µV/°C over the full temperature range. The device features a gain bandwidth product of 3.9 MHz, a slew rate of 1.2 V/µs, and a typical supply current of 400 µA per amplifier.

Feature Summary

• Extremely low input bias current with minimal sensitivity to ambient temperature variations up to 125°C
• Outputs remain stable with capacitive loads exceeding 1000 pF without requiring external compensation
• Immune to output phase reversal even when input voltages exceed the power supply rails
• MSL1 rated for compliance with stringent assembly processes and high internal system temperatures

Applications

• Sensor signal conditioning for thermocouples, resistance temperature detectors (RTDs), and strain gages
• Process control front-end amplifiers
• Precision filters and level setting circuits
• Precision diode power measurement in optical and wireless transmission systems

Procurement Notes

Verify the specific A-grade performance limits for offset voltage and drift against your design requirements, as these values differ significantly from B-grade variants. Confirm that the 8-lead MSOP footprint matches your PCB layout constraints. Ensure the reel quantity aligns with production volume needs. Cross-reference the datasheet revision to confirm the latest thermal resistance and absolute maximum ratings are applied to your manufacturing process.

Selection Notes

Select this component when designing for environments requiring operation up to 125°C where standard plastic packages may fail moisture sensitivity levels. Choose this part over JFET amplifiers if low bias current stability at elevated temperatures is critical. Consider the MSOP package only if board space is severely constrained, noting its higher thermal resistance compared to SOIC variants. Verify that the 400 µA supply current meets the power budget for portable or line-powered instrumentation applications.

Part Context

The ADA4077-1ARMZ-RL belongs to the sixth generation of Analog Devices' precision amplifier lineage, succeeding the OP07 family. It represents a significant evolution in combining high DC accuracy with wide bandwidth and low noise. This series addresses the limitations of previous generations by offering reduced power consumption while increasing bandwidth and slew rates, making it suitable for modern, compact electronic designs.

Replacement Considerations

ADA4077-1ARMZ-R7 serves as a functional substitute with identical electrical characteristics but differs in reel packaging quantity.