Texas Instruments OPA2244UA

Overview

OPA2244UA from Texas Instruments (formerly Burr-Brown) is a dual, rail-to-rail input/output, micropower operational amplifier in SOIC-8 package. It delivers 430kHz gain-bandwidth, 50µA per amplifier quiescent current, ±1.1V to ±18V dual supply or +2.2V to +36V single supply operation, and operates across –40°C to +85°C. It is used in battery-powered instrumentation and portable equipment requiring low power and wide supply range.

For engineers reviewing the OPA2244UA datasheet, OPA2244UA pinout, OPA2244UA application, or OPA2244UA equivalent, key selection criteria include micropower consumption (50µA/channel), unity-gain stability, input common-mode range extending to V–, output swing within 0.75V of rails, and guaranteed performance over full industrial temperature range.

Technical Context

The OPA2244UA implements a fully differential input stage with JFET inputs enabling ultra-low input bias current (–25nA typical) and high input impedance (10⁹Ω || 2pF). Its internal compensation ensures unity-gain stability without external components, and its architecture avoids phase inversion during input overdrive.

Each amplifier channel operates independently-no crosstalk between channels-enabling simultaneous use in multi-channel signal conditioning. The device maintains stable open-loop gain (≥86dB) and CMRR (≥72dB) across its full supply range and specified temperature range.

Key Specifications

Pinout & Package

OPA2244UA is housed in an 8-pin SOIC (SO-8) surface-mount package (JEDEC MS-012, TI drawing D), 3.9mm × 4.9mm footprint, 1.75mm max height, RoHS-compliant, moisture sensitivity level MSL-3 (260°C reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2244UA, OPA2333AIDR offers superior DC accuracy at the cost of bandwidth and output swing, while MCP6022-I/SN trades micropower for speed and drive strength-making OPA2244UA optimal for wide-supply, long-battery-life applications where 430kHz and 50µA are balanced requirements.

Availability

OPA2244UA is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical sensors, and PCMCIA card signal conditioning requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for OPA2244UA 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 acquired Burr-Brown in 2000 and maintains its precision analog portfolio, known for high-performance op amps, data converters, and interface ICs.

The OPA2244UA belongs to the MicroAmplifier™ series, designed specifically for space-constrained, battery-operated systems demanding micropower operation without sacrificing AC performance or DC precision.

FAQ

What is the maximum operating temperature range for the OPA2244UA?

The OPA2244UA is fully specified from –40°C to +85°C and operates across –55°C to +125°C. All electrical parameters-including input offset voltage, CMRR, and quiescent current-are guaranteed over the industrial temperature range (–40°C to +85°C), making OPA2244UA suitable for automotive under-hood and industrial control environments where thermal robustness is required.

Does the OPA2244UA require external compensation for unity-gain stability?

No, the OPA2244UA is internally compensated and unity-gain stable. No external capacitors or resistors are needed for stable operation at gain = 1. This is confirmed in the Applications Information section of the datasheet, which states "The OPA2244 is unity-gain stable and suitable for a wide range of general purpose applications." Designers can directly configure OPA2244UA as a voltage follower or non-inverting amplifier without risk of oscillation.

Can the OPA2244UA be used with a single 3.3V supply?

Yes, the OPA2244UA supports single-supply operation down to +2.2V, so it functions reliably at +3.3V. Its input common-mode range includes ground (0V), and its output swings to within 0.75V of V+ and 0.1V of V–, delivering usable 2.55Vpp output swing into 20kΩ. This makes OPA2244UA ideal for interfacing with 3.3V ADCs and microcontrollers in portable electronics.

What is the typical input bias current of the OPA2244UA, and how does it affect high-impedance sensor interfaces?

The typical input bias current of the OPA2244UA is –25nA at TA = +25°C, with a maximum of –10nA over temperature. This ultra-low bias current minimizes voltage error across high-impedance sources (e.g., pH electrodes, piezoresistive sensors, or photodiode TIA feedback networks), preserving signal integrity without requiring guard traces or active bias cancellation. The OPA2244UA's JFET input stage ensures this performance remains stable across its full supply and temperature range.

Is the OPA2244UA pin-compatible with other dual op amps in SOIC-8 packages such as the LM2904 or TL072?

No, the OPA2244UA is not pin-compatible with LM2904 or TL072. While all three use SOIC-8 packages, their pinouts differ: OPA2244UA uses standard dual-op-amp pinout (Out A, –In A, +In A, V–, +In B, –In B, Out B, V+), whereas LM2904 places V+ at Pin 8 and V– at Pin 4 (same as OPA2244UA), but TL072 swaps Pins 1/7 (outputs) and has different internal routing. PCB layout must be verified against the OPA2244UA-specific pinout diagram-not assumed from generic SOIC-8 conventions.