Texas Instruments OPA4137UAE4

Overview

OPA4137UAE4 from Texas Instruments is a quad FET-input operational amplifier optimized for low-cost, low-power precision signal conditioning in space-constrained systems. It delivers 5pA input bias current, ±1.5mV max input offset voltage, 1MHz gain-bandwidth, 3.5V/µs slew rate, and operates from ±2.25V to ±18V supplies - enabling use in battery-powered instrumentation, photodetector front-ends, and precision integrators.

For engineers reviewing the OPA4137UAE4 datasheet, OPA4137UAE4 pinout, OPA4137UAE4 application, or OPA4137UAE4 equivalent, this page provides verified specifications, SO-14 package terminal mapping, real-world application context, and validated alternative options for design-in flexibility and supply continuity.

Technical Context

The OPA4137UAE4 implements fully independent amplifier channels in a single monolithic die, eliminating crosstalk and interaction - critical for multi-channel sensor signal chains. Its FET-input architecture enables rail-to-rail input common-mode range extending to the positive supply (V+), supporting high-side current sensing and single-supply operation down to +4.5V.

It features unity-gain stability, no phase inversion under overdrive, and maintains linearity up to output swing limits. Guaranteed performance across –40°C to +85°C includes 94dB open-loop gain, 74dB CMRR, and 0.05% THD+N at 1kHz - making it suitable for precision analog front-ends where DC accuracy and dynamic fidelity coexist.

Key Specifications

Pinout & Package

OPA4137UAE4 is packaged in a 14-pin SOIC (SO-14) surface-mount package with standard 1.27mm pitch, JEDEC MS-012AC compliant, and moisture sensitivity level (MSL) 3 (260°C, 168 hours).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FET-input op amp applications.

Compared with OPA4137UAE4, the OPA4137U offers identical performance with minor packaging differentiation, while TL074CDR trades precision and input impedance for bandwidth and cost - making OPA4137UAE4 optimal for battery-powered, low-drift, high-Z sensor signal chains where accuracy and power efficiency are prioritized.

Availability

OPA4137UAE4 is available at Aetrix Electronics and suitable for precision instrumentation, photodetector front-ends, and battery-powered test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for OPA4137UAE4 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

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of heritage in precision op amps and signal chain solutions.

The OPA4137UAE4 belongs to TI's MicroAmplifier™ series - designed specifically for miniature, low-cost, low-power precision analog applications where FET-input performance meets industrial temperature and reliability requirements.

FAQ

What is the maximum operating temperature range for the OPA4137UAE4?

The OPA4137UAE4 is specified from –40°C to +85°C for reliable operation, with extended functionality up to +125°C. Its thermal resistance (θ_JA) is 100°C/W in the SO-14 package, allowing safe operation at full ratings with minimal board-level heatsinking. The device remains functional down to –55°C, supporting harsh-environment deployments.

Does the OPA4137UAE4 support single-supply operation?

Yes, the OPA4137UAE4 supports single-supply operation from +4.5V to +36V. Its input common-mode range extends to the positive rail (V+), enabling high-side sensing and rail-referenced configurations. For optimal performance, ensure input signals remain within (V–)+3V to V+, and bypass both supply pins with ≥10nF ceramic capacitors.

Is the OPA4137UAE4 pin-compatible with other quad op amps like the LM324?

No, the OPA4137UAE4 is not pin-compatible with the LM324. It uses a different pinout optimized for independent channel isolation and FET-input performance. The OPA4137UAE4 follows the industry-standard SO-14 quad op amp layout (e.g., matching OPA4137P and OPA4137U), whereas LM324 uses a distinct arrangement. PCB redesign is required for substitution.

What is the input protection scheme on the OPA4137UAE4?

The OPA4137UAE4 features internal ESD diode clamps from each input to V+ and V–, rated for ±2mA absolute maximum input current. If input voltage exceeds the supply rails by more than 500mV, an external series resistor must limit current to ≤2mA to prevent unpredictable behavior or damage. This protection preserves integrity in noisy or fault-prone environments.

Can the OPA4137UAE4 drive capacitive loads without instability?

Yes, the OPA4137UAE4 is specified to drive up to 1000pF capacitive loads while maintaining stability. Its unity-gain stable architecture and internal compensation allow direct connection to ADC input capacitors, long cables, or filter networks without external isolation resistors - simplifying layout and reducing component count in data acquisition systems.