Texas Instruments OPA4330AIRGYT

Overview

OPA4330AIRGYT from Texas Instruments is a quad-channel, zero-drift CMOS operational amplifier optimized for precision low-voltage operation (1.8 V to 5.5 V). It delivers 50 µV maximum input offset voltage, 0.25 µV/°C max drift, 1.1 µV_PP (0.1–10 Hz) noise, and 35 µA maximum quiescent current per amplifier-enabling high-accuracy signal conditioning in battery-powered medical sensors and electronic scales.

For engineers reviewing the OPA4330AIRGYT datasheet, OPA4330AIRGYT pinout, OPA4330AIRGYT application, or OPA4330AIRGYT equivalent, this page provides verified package mapping (14-pin VQFN), channel-specific pin functions, rail-to-rail I/O behavior, EMI-filtered input structure, and real-world design implications of its auto-calibration architecture.

Technical Context

The OPA4330AIRGYT implements a proprietary auto-calibration chopper-stabilized architecture with dual-stage modulation (CHOP1/CHOP2), notch filtering, and feed-forward gain stage (GM_FF) to suppress 1/f noise and eliminate thermal drift. Its input stage uses CMOS transistors with integrated 10-kΩ EMI filter resistors on both inputs, enabling robust operation in noisy industrial environments.

This device operates as a unity-gain stable, rail-to-rail input/output op amp with common-mode range extending 0.1 V beyond supply rails and output swing within 100 mV of rails at 10 mA load. It requires no external compensation and supports single-supply configurations down to 1.8 V without phase reversal or output saturation artifacts.

Key Specifications

Pinout & Package

OPA4330AIRGYT is housed in a 14-pin VQFN package (3.5 mm × 3.5 mm, 0.5 mm pitch) with exposed thermal die pad connected to V– for enhanced thermal performance (R_θJA = 49.2°C/W, R_θJC(bot) = 4.6°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA4330AIRGYT, OPA4188IDR trades 12× higher quiescent current for 2× lower drift and offset, while MCP6V84-E/ST reduces cost and power at the expense of 3× higher 0.1–10 Hz noise-making OPA4330AIRGYT the optimal balance for battery-powered precision analog front-ends.

Availability

OPA4330AIRGYT is available at Aetrix Electronics and suitable for medical sensor front-ends, battery-powered weigh scales, and industrial temperature transducers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA4330AIRGYT 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 company headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and system-on-chip solutions for industrial, automotive, and personal electronics markets.

The OPA4330AIRGYT belongs to TI's Zero-Drift Operational Amplifier product line, engineered specifically for high-accuracy, low-power signal conditioning in resource-constrained embedded systems operating from unregulated battery sources.

FAQ

What is the maximum supply voltage for OPA4330AIRGYT?

The OPA4330AIRGYT has an absolute maximum supply voltage of 7 V, but its recommended operating range is strictly 1.8 V to 5.5 V. Exceeding 5.5 V risks permanent damage and invalidates parametric guarantees. At 5.5 V, it maintains full specification compliance including 50 µV V_OS max and 35 µA I_Q max across –40°C to +125°C.

Does OPA4330AIRGYT require external compensation for unity-gain stability?

No, the OPA4330AIRGYT is internally compensated and unity-gain stable across its full operating range. It drives up to 100 pF capacitive loads without oscillation or peaking, as confirmed in the datasheet's Typical Characteristics (Figure 14). No external compensation components are needed for G = +1, –1, or higher closed-loop gains.

How does the auto-calibration architecture of OPA4330AIRGYT affect signal integrity?

The OPA4330AIRGYT's auto-calibration operates continuously in background mode without interrupting the signal path, eliminating switching artifacts or intermodulation distortion. Unlike traditional choppers, it avoids 1/f noise folding and delivers flat noise density down to 0.01 Hz-preserving DC and low-frequency signal fidelity critical in medical and sensor applications.

Can OPA4330AIRGYT operate with input voltages beyond the supply rails?

Yes-the OPA4330AIRGYT features rail-to-rail inputs with a common-mode range extending 0.1 V beyond V– and V+, i.e., from (V– – 0.1 V) to (V+ + 0.1 V). Input currents remain within spec (<500 pA) in this range. Voltages exceeding this window require current limiting to ≤10 mA via series resistors to prevent ESD diode conduction.

What thermal management considerations apply to OPA4330AIRGYT in VQFN package?

The OPA4330AIRGYT in RGY (VQFN) package requires the exposed thermal die pad to be soldered to a PCB copper pour connected to V–. This achieves R_θJC(bot) = 4.6°C/W and R_θJA = 49.2°C/W. Without proper pad connection, junction temperature rise increases significantly-potentially violating the 150°C absolute max TJ limit under 140 µA total quiescent load.