Texas Instruments OPA336UA/2K5

Overview

OPA336UA/2K5 from Texas Instruments is a single-supply, microPower CMOS operational amplifier optimized for battery-powered instrumentation. It delivers rail-to-rail output swing within 3 mV of the rails, 125 µV max input offset voltage, and ultra-low 20 µA quiescent current per amplifier-enabling precision signal conditioning in portable medical devices and photodiode pre-amplifiers.

For engineers reviewing the OPA336UA/2K5 datasheet, OPA336UA/2K5 pinout, OPA336UA/2K5 application, or OPA336UA/2K5 equivalent, key selection criteria include its 2.3 V to 5.5 V supply range, 1 pA input bias current, 115 dB open-loop gain, rail-to-rail output capability under 100 kΩ load, and SOIC-8 packaging with industrial temperature support (–40°C to +85°C).

Technical Context

The OPA336UA/2K5 implements a unity-gain-stable CMOS input stage with common-mode input range extending to the negative rail (V– – 0.2 V), enabling true single-supply operation. Its rail-to-rail output stage uses complementary PMOS/NMOS drivers to achieve 3 mV swing margin at 100 kΩ load while maintaining >70 dB open-loop gain.

Designed on a 0.6 µm CMOS process, it features ESD protection (HBM: 500 V), reverse-battery tolerance, and stable operation with capacitive loads up to 300 pF in unity-gain configuration-enhanced to >1000 pF when using a 100 Ω series resistor in the feedback path.

Key Specifications

Pinout & Package

OPA336UA/2K5 is packaged in an 8-pin SOIC (D) surface-mount package with standard JEDEC outline, 1.27 mm pitch, and RoHS-compliant lead finish. Thermal resistance θ_JA = 150°C/W enables operation up to +85°C ambient without forced airflow.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar operational amplifier applications.

Compared with OPA340UA/2K5 and MCP6001T-E/OT, the OPA336UA/2K5 uniquely balances guaranteed low offset (125 µV max), rail-to-rail output with 3 mV margin, and industrial temperature rating-all at 20 µA IQ-making it optimal for precision, battery-limited instrumentation where long-term calibration stability is critical.

Availability

OPA336UA/2K5 is available at Aetrix Electronics and suitable for battery-powered instruments, portable medical devices, photodiode pre-amplifiers, and precision integrators requiring stable component supply across industrial temperature ranges and multi-year production cycles.

Supply support for OPA336UA/2K5 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The OPA336UA/2K5 belongs to TI's microPower CMOS op amp family, engineered specifically for ultra-low-power, high-precision signal conditioning in single-supply, battery-operated systems where offset, bias current, and supply voltage flexibility are critical.

FAQ

What is the maximum operating supply voltage for OPA336UA/2K5?

The OPA336UA/2K5 has an absolute maximum supply voltage of 7.5 V, but its specified operating range is 2.3 V to 5.5 V. Operation at 5.5 V is fully characterized across –40°C to +85°C, while minimum functional voltage is 2.1 V. Exceeding 5.5 V voids parametric guarantees and risks reliability degradation.

Does OPA336UA/2K5 support true rail-to-rail input common-mode range?

The OPA336UA/2K5 supports rail-to-rail *output*, swinging to within 3 mV of V+ and V–. Its input common-mode range extends from (V–) – 0.2 V to (V+) – 1 V - meaning it accepts signals down to the negative rail but not quite to V+. For true rail-to-rail input, consider TI's OPA320 series instead.

Can OPA336UA/2K5 drive capacitive loads, and what is the recommended approach?

Yes - the OPA336UA/2K5 can drive up to ~300 pF directly in unity-gain configuration. For larger loads (>300 pF), insert a 50–100 Ω resistor inside the feedback loop (between output and inverting input). This preserves DC accuracy while damping ringing, enabling stable operation with >1000 pF when combined with appropriate resistive loading.

Is OPA336UA/2K5 pin-compatible with other members of the OPA336 family?

No - the OPA336UA/2K5 is the SOIC-8 variant of the single-channel OPA336. It shares identical electrical specifications with the SOT-23-5 (OPA336NA/3K) and ceramic DIP-8 versions, but pinout differs: SOIC-8 includes two NC pins and places V+ and V– on opposite sides, unlike the 5-pin SOT-23 layout. Always verify pin mapping before PCB reuse.

What is the ESD rating and handling guidance for OPA336UA/2K5?

The OPA336UA/2K5 is rated for 500 V HBM and 100 V MM ESD sensitivity. Texas Instruments recommends using grounded wrist straps, conductive foam, and ESD-safe work surfaces during handling. Avoid touching exposed leads; soldering must follow JEDEC Level-2 reflow profile (peak 260°C) to prevent latent damage to the CMOS input stage.