Texas Instruments OPA4374AIPWR

Overview

OPA4374AIPWR from Texas Instruments is a quad rail-to-rail input/output CMOS operational amplifier optimized for low-power, high-bandwidth signal conditioning in space-constrained single-supply systems. It delivers 6.5 MHz gain-bandwidth, 5 V/µs slew rate, 585 µA quiescent current per channel, and operates from 2.3 V to 5.5 V - enabling precision analog front-ends in battery-powered portable instrumentation and sensor interfaces.

For engineers reviewing the OPA4374AIPWR datasheet, OPA4374AIPWR pinout, OPA4374AIPWR application, or OPA4374AIPWR equivalent, key selection criteria include its rail-to-rail I/O swing (within 25 mV of rails), ultra-low input bias current (≤10 pA), 5 mV max input offset, operation up to 125°C, and compatibility with 14-pin SOIC and TSSOP packages.

Technical Context

The OPA4374AIPWR implements a complementary CMOS input stage enabling rail-to-rail common-mode input range extending 200 mV beyond both supply rails, with no phase inversion when inputs exceed supplies (if current-limited to ≤10 mA). Its class AB output stage supports rail-to-rail output swing under light loads (≤100 kΩ) and maintains >94 dB open-loop gain across temperature.

It features unity-gain stability, 10 kHz input voltage noise density of 15 nV/√Hz, and 0.0013% THD+N at 1 kHz - making it suitable for driving SAR ADCs and active filtering where dynamic range and linearity are critical. No shutdown function is integrated, distinguishing it from the OPAx373 family.

Key Specifications

Pinout & Package

OPA4374AIPWR is available in 14-pin TSSOP (PW) package (5.00 mm × 4.40 mm) and 14-pin SOIC (D) package (8.65 mm × 3.91 mm). Both variants share identical pinout and thermal performance (R_θJA = 112.7°C/W for PW, 86.5°C/W for D).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad rail-to-rail CMOS op amp applications.

Compared with OPA4374AIPWR, OPA4377AIPWR trades 2.7× higher supply current for 54% more bandwidth and 97% lower offset, while MCP6004-E/ST sacrifices 85% bandwidth and high-temp capability to reduce cost and quiescent current by 83% - making OPA4374AIPWR the balanced choice for 12-bit, 125°C, battery-aware designs.

Availability

OPA4374AIPWR is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and industrial analog input modules requiring stable component supply, long-term manufacturability, and guaranteed extended-temperature performance.

Supply support for OPA4374AIPWR 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 expertise in precision op amp design and automotive-grade qualification.

The OPAx374 family was engineered for low-voltage, high-fidelity signal conditioning in portable and harsh-environment systems - emphasizing rail-to-rail operation, micropower efficiency, and robust thermal performance from −40°C to 125°C.

FAQ

What is the maximum operating supply voltage for OPA4374AIPWR?

The absolute maximum supply voltage for OPA4374AIPWR is 7 V, but the recommended operating range is 2.3 V to 5.5 V. Operation above 5.5 V risks permanent damage and invalidates parametric guarantees. The device is fully characterized at 2.7 V and 5.5 V, with electrical specifications maintained across this range - including 6.5 MHz GBW and rail-to-rail output swing.

Does OPA4374AIPWR support true rail-to-rail input beyond the supply rails?

Yes - OPA4374AIPWR's input common-mode range extends 200 mV beyond both V+ and V− rails (i.e., from V− −0.2 V to V+ +0.2 V). This is achieved via a complementary CMOS input stage. Inputs exceeding this range by ≤500 mV are safe if current-limited to ≤10 mA, with no phase inversion observed - a key advantage over older bipolar-input op amps.

Is OPA4374AIPWR pin-compatible with other devices in the OPAx374 family?

OPA4374AIPWR shares identical pinout across its 14-pin SOIC (D) and TSSOP (PW) packages, but is not pin-compatible with OPA2374 (8-pin) or OPA374 (5- or 8-pin) due to differing channel count and pin assignments. No shutdown pin exists - unlike OPAx373 variants - so direct substitution requires circuit review for enable functionality.

What is the typical output voltage swing for OPA4374AIPWR under 5 kΩ load?

Under a 5 kΩ resistive load, OPA4374AIPWR delivers an output swing within 100–125 mV of each rail (V+ and V−) at room temperature. This is specified across −40°C to +125°C. For full rail-to-rail swing, use loads ≥100 kΩ - where typical swing improves to within 18 mV of rails - preserving dynamic range in low-power, high-impedance interfaces.

Can OPA4374AIPWR drive capacitive loads without external compensation?

OPA4374AIPWR is unity-gain stable and can drive up to ~250 pF pure capacitive load without oscillation. For larger loads or demanding phase-margin requirements, TI recommends adding a small series resistor (10–20 Ω) between output and capacitive load - as shown in Figure 23 of the SBOS279F datasheet - to isolate the op amp's output impedance from the load pole.