Analog Devices Inc. OP497GSZ

Overview

OP497GSZ from Analog Devices is a precision quad operational amplifier in a 16-lead SOIC_W (RW-16) package, featuring 75 μV max offset voltage, 150 pA max input bias current at 25°C, and 2000 V/mV min open-loop gain. It operates from ±2 V to ±20 V supplies with 625 μA max supply current per amplifier, enabling high-accuracy signal conditioning in photodiode preamplifiers and strain gage bridges.

For engineers reviewing the OP497GSZ datasheet, OP497GSZ pinout, OP497GSZ application, or OP497GSZ equivalent, this page delivers verified specifications, validated pin functions, temperature-stable picoampere-input performance data, and real-world design context for instrumentation-grade analog circuits requiring long-term DC stability and ultra-low input current.

Technical Context

The OP497GSZ employs a superbeta input stage with bias current cancellation, maintaining sub-200 pA input bias current across −40°C to +85°C - unlike FET-input op amps whose bias current doubles every 10°C rise. Its 114 dB min common-mode rejection and 114 dB min power supply rejection minimize error in battery-powered and bridge-based systems.

With 0.05 V/μs min slew rate and 500 kHz gain-bandwidth product, the device supports precision DC-coupled applications including long-term integrators and logarithmic amplifiers, while its 150 dB channel separation prevents crosstalk in multi-channel sensor front-ends.

Key Specifications

Pinout & Package

OP497GSZ is packaged in a 16-lead wide-body SOIC (JEDEC MS-013-AA, RW-16), 10.5 mm × 7.6 mm × 2.35 mm, RoHS-compliant, with exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision quad op amp applications.

Compared with OP497FSZ, OP497GSZ offers identical precision performance in a wider SOIC package optimized for thermal dissipation and mechanical robustness; versus LT1499ISW#PBF, OP497GSZ trades bandwidth and bias current for 50% lower supply current and guaranteed high CMR - making it superior for low-power, high-common-mode industrial sensing.

Availability

OP497GSZ is available at Aetrix Electronics and suitable for strain gage amplifiers, photocurrent monitors, and high-stability thermocouple amplifiers requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for OP497GSZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA, with design centers worldwide and ISO 9001-certified manufacturing.

The OP497 product line was engineered specifically for ultra-low-input-current, high-DC-precision applications - including sensor signal conditioning, scientific instrumentation, and battery-powered measurement systems where picoampere-level bias stability is non-negotiable.

FAQ

What is the maximum input bias current specification for OP497GSZ over temperature?

The OP497GSZ has a maximum input bias current of 300 pA over the full operating temperature range of −40°C to +85°C. At 25°C, the limit is tighter: 150 pA maximum. This is achieved via superbeta input transistors with active bias cancellation, distinguishing it from conventional FET-input op amps whose bias current rises exponentially with temperature. The OP497GSZ maintains this picoampere-level stability without requiring external nulling or calibration.

Does OP497GSZ support single-supply operation?

OP497GSZ is specified for dual-supply operation from ±2 V to ±20 V and does not support true single-supply operation with rail-to-rail input or output. Its input common-mode range extends to within ~1 V of either rail, and output swing reaches within ~1 V of the rails with 10 kΩ load - but it requires both positive and negative supplies to function correctly. For single-supply designs, consider dedicated rail-to-rail op amps; OP497GSZ is intended for bipolar-sensing applications like bridge and thermocouple amplifiers.

What is the package type and lead count of OP497GSZ?

OP497GSZ uses a 16-lead wide-body SOIC package compliant with JEDEC MS-013-AA, designated RW-16. Its dimensions are 10.5 mm × 7.6 mm × 2.35 mm, with 1.27 mm lead pitch. Two pins (8 and 10) are no-connect (NC) and must remain unconnected on the PCB. The "Z" suffix confirms RoHS compliance, and "-REEL1" indicates tape-and-reel packaging for automated assembly.

How does OP497GSZ compare to OP297 in terms of channel count and key specs?

OP497GSZ is a quad op amp, while OP297 is a dual op amp - both share identical core specifications: 75 μV max offset voltage, 150 pA max input bias current at 25°C, and 2000 V/mV min open-loop gain. They use the same superbeta input architecture and operate from ±2 V to ±20 V. The primary distinction is channel density: OP497GSZ integrates four matched amplifiers in one RW-16 package, reducing board area and inter-channel mismatch in multi-sensor systems where OP297 would require two devices.

Is OP497GSZ suitable for photodiode transimpedance amplifier (TIA) applications?

Yes, OP497GSZ is well-suited for TIA applications due to its 150 pA max input bias current at 25°C and 300 pA max over −40°C to +85°C, minimizing dark-current-induced offset errors. Its 500 kHz gain-bandwidth product supports stable operation with feedback resistors up to 1 GΩ when combined with proper capacitive compensation (e.g., 0.3–1 pF). Layout best practices - including guard rings and clean PCB surfaces - are essential to preserve its >500 GΩ input impedance and avoid leakage paths that degrade photocurrent accuracy.