Texas Instruments OPA4703UA

Overview

OPA4703UA from Texas Instruments is a quad, rail-to-rail input/output CMOS operational amplifier optimized for low-power, medium-speed signal conditioning in single- or dual-supply systems. It delivers 1 MHz gain-bandwidth product, 0.6 V/µs slew rate, ±160 µV max input offset voltage, 160 µA quiescent current per amplifier, and full rail-to-rail swing - enabling high dynamic range in battery-powered data acquisition and sensor interfaces.

For engineers reviewing the OPA4703UA datasheet, OPA4703UA pinout, OPA4703UA application, or OPA4703UA equivalent, this page provides verified package mapping (SO-14), confirmed quad-channel rail-to-rail I/O behavior, temperature-stable CMRR (90 dB full-scale), low-input-bias-current (1 pA) operation, and design-critical output swing specs (40 mV from rail at light load) - all validated for –40°C to +85°C industrial use.

Technical Context

The OPA4703UA employs a complementary differential input stage enabling rail-to-rail common-mode input range extending 300 mV beyond supply rails, with no phase inversion under overvoltage conditions when input current is limited. Its class-AB output stage achieves rail-to-rail output swing down to 40 mV from V+ or V– at 100 kΩ load while maintaining >80 dB open-loop gain.

It is unity-gain stable and specified across ±2 V to ±6 V dual supplies (or 4 V to 12 V single supply), with guaranteed performance over –40°C to +85°C. Input bias current remains ≤10 pA across temperature, and PSRR/CMRR are characterized over frequency and voltage range - supporting precision DC-coupled and AC-coupled transducer amplification.

Key Specifications

Pinout & Package

OPA4703UA is housed in a 14-pin SOIC (SO-14) surface-mount package with standard JEDEC MO-001AC footprint, 1.27 mm pitch, and 8.65 mm × 3.91 mm body size. Thermal resistance θ_JA = 100°C/W enables operation at full rating without forced airflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA4703EA and TLV2474IDR, the OPA4703UA offers the optimal balance of SOIC-14 manufacturability, 160 µA/channel ultra-low power, full ±6 V dual-supply support, and guaranteed –40°C to +85°C performance - making it the preferred choice for cost-sensitive, thermally stable, and layout-flexible industrial signal chains.

Availability

OPA4703UA is available at Aetrix Electronics and suitable for portable data loggers, automotive cabin sensor interfaces, and industrial transducer amplifiers requiring stable component supply, long-term lifecycle support, and consistent SOIC-14 sourcing.

Supply support for OPA4703UA 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 solutions, with decades of expertise in precision op amps and signal chain components.

The OPA703/OPA704 family - including OPA4703UA - was designed for low-power, rail-to-rail signal conditioning in battery-operated and space-constrained industrial, automotive, and portable measurement systems.

FAQ

What is the maximum supply voltage for OPA4703UA?

The absolute maximum supply voltage for OPA4703UA is 13.2 V across V+ and V– terminals. However, its specified operating range is 4 V to 12 V for single supply or ±2 V to ±6 V for dual supplies - with full parameter guarantees over –40°C to +85°C within that range. Exceeding 12 V risks parametric shift or reliability degradation.

Does OPA4703UA support true rail-to-rail input beyond the supply rails?

Yes - OPA4703UA features a complementary input stage allowing common-mode input voltage from (V–) – 0.3 V to (V+) + 0.3 V. This 300 mV beyond-rail capability enables robust interfacing with overvoltage-tolerant sensors and eliminates level-shifting in many front-end designs, provided input current is limited to ≤10 mA.

Can OPA4703UA drive capacitive loads, and what is the limit?

OPA4703UA can drive up to 1000 pF of pure capacitive load while maintaining stability. For unity-gain configurations with >100 pF loads, adding a 10 Ω to 20 Ω series resistor inside the feedback loop (between output and inverting input) suppresses ringing without affecting DC accuracy - a technique validated in TI's SBOS180A datasheet.

Is OPA4703UA unity-gain stable, and how does it compare to OPA4704UA?

Yes, OPA4703UA is unity-gain stable and optimized for G = 1 to 4 applications. In contrast, OPA4704UA is compensated for minimum G = 5, offering 3 MHz GBW and 3 V/µs slew rate - but becomes unstable below G = 5. Use OPA4703UA for buffers, followers, and low-gain stages; reserve OPA4704UA for higher-gain, higher-speed signal paths.

What is the output voltage swing specification for OPA4703UA at 20 kΩ load?

At 20 kΩ load and room temperature, OPA4703UA delivers output swing within 75 mV of each supply rail while maintaining >100 dB open-loop gain - meaning a ±5 V supply yields >9.85 Vpp output range. This is confirmed in the Electrical Characteristics table under "Voltage Output Swing from Rail" with RL = 20 kΩ, AOL > 100 dB.