Analog Devices Inc. OP97EPZ

Overview

OP97EPZ from Analog Devices is a low-power, high-precision operational amplifier designed for DC-critical signal conditioning in battery-powered and thermally constrained systems. It delivers 25 μV max offset voltage, 0.6 μV/°C max drift, 600 μA max supply current, and 114 dB min CMRR in an 8-lead PDIP package - enabling precision integrators, sensor front-ends, and DAC output stages operating from ±2.25 V to ±20 V supplies.

For engineers reviewing the OP97EPZ datasheet, OP97EPZ pinout, OP97EPZ application, or OP97EPZ equivalent, this page provides verified electrical specifications, thermal performance data, nulling circuit implementation guidance, and real-world use cases including current monitoring with >114 dB CMRR and programmable gain amplifier design with microvolt-level accuracy.

Technical Context

The OP97EPZ implements a bipolar input stage optimized for ultra-low bias current (≤100 pA at 25°C) and minimal offset drift, achieving OP07-class precision with <1/6 the quiescent power. Its input protection uses back-to-back diodes without series resistors - preserving noise performance but requiring external current limiting for differential inputs exceeding ±1 V.

It features a dedicated overcompensation pin (Pin 5) to trade bandwidth for phase margin, supports direct replacement of OP07/OP77/AD725 in existing sockets, and maintains rail-to-rail common-mode input range (±13.5 V at ±15 V supplies) while delivering ±13 V output swing into 10 kΩ.

Key Specifications

Pinout & Package

OP97EPZ is packaged in an 8-lead plastic dual in-line package (PDIP), compliant with JEDEC MS-001, with 0.300-inch body width and 0.100-inch lead pitch. Thermal resistance θ_JA is 103°C/W (socket-mounted).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision operational amplifier applications.

Compared with OP07CP and AD8628ARZ, OP97EPZ uniquely balances ultra-low power (600 μA), OP07 pin compatibility, and 25 μV offset - making it optimal for upgrading existing precision analog circuits without layout changes or battery life compromise.

Availability

OP97EPZ is available at Aetrix Electronics and suitable for precision instrumentation, portable medical devices, and industrial process control systems requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for OP97EPZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide.

The OP97EPZ belongs to Analog Devices' precision operational amplifier product line, engineered specifically for low-power, high-accuracy DC signal conditioning in applications where thermal management, battery life, and long-term stability are critical.

FAQ

What is the maximum supply voltage for OP97EPZ?

The absolute maximum supply voltage for OP97EPZ is ±20 V, as specified in Table 3 of the Rev. G datasheet. Continuous operation is rated from ±2.25 V to ±20 V. Exceeding ±20 V risks permanent damage, and operation below ±2.25 V may result in undefined output behavior or reduced CMRR. The OP97EPZ maintains full specification compliance across its entire operating range, including 114 dB CMRR at ±2.25 V supplies.

Does OP97EPZ require external offset nulling in typical applications?

No, OP97EPZ does not require external offset nulling in the majority of circuits due to its guaranteed 25 μV maximum input offset voltage at 25°C and 60 μV maximum over the full −40°C to +85°C range. The device includes Pins 1 and 8 for optional nulling using a 5–100 kΩ potentiometer tied to V+, but this is only necessary in applications demanding sub-10 μV residual offset - such as metrology-grade integrators or zero-drift reference buffers.

How does OP97EPZ compare to OP07 in terms of power consumption and pin compatibility?

OP97EPZ consumes less than 1/6 the supply current of OP07 (600 μA max vs. 2.5 mA), while maintaining identical 8-lead PDIP pinout, nulling configuration (Pins 1 and 8), and socket compatibility. This allows direct replacement in existing OP07-based designs without PCB modification - delivering immediate power savings and improved thermal performance while preserving system-level calibration and layout integrity.

What is the purpose of Pin 5 (OVER) on OP97EPZ?

Pin 5 on OP97EPZ is the overcompensation terminal, used to connect an external capacitor that increases phase margin at the expense of gain-bandwidth product. This feature stabilizes the amplifier when driving heavy capacitive loads (>1000 pF) or operating at gains >10. As shown in Figure 24 and Figure 25 of the Rev. G datasheet, adding 220 pF to Pin 5 reduces slew rate from 0.2 V/μs to ~0.08 V/μs but improves stability margin by >20° - essential for DAC output buffering and long-cable transmission.

Can OP97EPZ operate with unbalanced input source impedances?

Yes, OP97EPZ can operate with unbalanced input source impedances due to its ultra-low input bias current (≤100 pA at 25°C). Unlike older precision op-amps, it does not require matched input resistances to prevent offset errors. As confirmed in the Application Information section (Page 11), offset voltage and TCVOS degrade only minimally even with high and unbalanced source resistances - enabling simplified front-end design for sensors with asymmetric output impedance.