Texas Instruments OPA336N/250

Overview

OPA336N/250 from Texas Instruments is a single-channel, rail-to-rail output, microPower CMOS operational amplifier designed for ultra-low-power, single-supply battery-operated systems. It delivers 125 µV max input offset voltage, 20 µA quiescent current per amplifier, and rail-to-rail output swing within 3 mV of supply rails under 100 kΩ load - enabling precision signal conditioning in portable medical instruments and photodiode pre-amplifiers.

For engineers reviewing the OPA336N/250 datasheet, OPA336N/250 pinout, OPA336N/250 application, or OPA336N/250 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 input common-mode range extending to V–, and SOT-23-5 package compatibility with space-constrained PCB layouts.

Technical Context

The OPA336N/250 employs a CMOS input stage with ultra-low input bias current (1 pA typical) and operates stably at unity gain. Its input common-mode range extends from (V–) – 0.2 V to (V+) – 1 V, supporting true single-supply operation without phase inversion even when inputs exceed supply rails.

Internally compensated for unity-gain stability, it achieves 100 kHz gain-bandwidth product and 0.03 V/µs slew rate while maintaining low noise (40 nV/√Hz at 1 kHz) and high PSRR (100 µV/V typical). Thermal performance is characterized across –40°C to +85°C, with junction temperature rated to 150°C.

Key Specifications

Pinout & Package

OPA336N/250 is housed in a 5-pin SOT-23-5 surface-mount package (DBV), optimized for compact, high-density layouts. Pin 1 is marked with a dot and located in quadrant Q3 on tape-and-reel packaging.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA336N/250, OPA333AIDBVR improves DC accuracy at the cost of increased 1/f noise, while MCP6001T-I/OT trades precision and quiescent current for broader voltage tolerance and higher drive capability - making OPA336N/250 optimal for battery-powered precision analog front-ends where offset, noise, and power are co-constrained.

Availability

OPA336N/250 is available at Aetrix Electronics and suitable for battery-powered medical sensors, photodiode pre-amplifiers, precision integrators, and portable test equipment requiring stable component supply across extended production lifecycles.

Supply support for OPA336N/250 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 OPA336N/250 belongs to TI's microAmplifier™ series, engineered specifically for ultra-low-power, single-supply precision signal conditioning in portable and energy-harvesting applications.

FAQ

What is the minimum operating voltage for the OPA336N/250?

The OPA336N/250 operates down to 2.1 V, though it is fully specified from 2.3 V to 5.5 V. At 2.1 V, key parameters such as open-loop gain and output swing remain functional but may fall outside guaranteed limits - design validation is recommended for sub-2.3 V use. The OPA336N/250 maintains rail-to-rail output behavior and 1 pA input bias current even at minimum voltage.

Does the OPA336N/250 require external compensation for unity-gain stability?

No, the OPA336N/250 is internally compensated and unity-gain stable. It does not require external capacitors or resistors to maintain phase margin in G = 1 configurations. This simplifies design in buffer and follower applications. The OPA336N/250 achieves stable step response with ≤300 pF capacitive loads in unity gain, and up to 1000 pF when paired with a 100 Ω series resistor in the feedback path.

What is the maximum capacitive load the OPA336N/250 can drive reliably?

The OPA336N/250 can reliably drive up to 300 pF in unity-gain configuration without external compensation. With a 100 Ω series resistor inside the feedback loop, it supports ≥1000 pF loads while maintaining stability and minimal overshoot. Driving >300 pF without isolation risks peaking or oscillation - especially with low-resistance loads tied to VS/2. The OPA336N/250 datasheet confirms stable operation with 2 kΩ || 1000 pF under G = +1 conditions.

How does the input common-mode range of the OPA336N/250 compare to standard op amps?

The OPA336N/250 features an extended input common-mode range from (V–) – 0.2 V to (V+) – 1 V - meaning it accepts inputs slightly below ground and up to 1 V below the positive rail. Unlike many op amps, it exhibits no phase inversion when inputs exceed supply rails, provided input current is limited to 10 mA. This eliminates level-shifting requirements in single-supply sensor interfaces. The OPA336N/250 maintains this behavior across its full –40°C to +85°C operating range.

Is the OPA336N/250 RoHS compliant and lead-free?

Yes, the OPA336N/250 is RoHS compliant and features NiPdAu (NIPDAU) lead finish. It meets JEDEC MSL Level-1 (unlimited floor life at ≤30°C/60% RH) and is qualified for reflow up to 260°C peak. The device carries no exemptions and is compatible with standard lead-free assembly processes. All OPA336N/250 reels shipped by Aetrix Electronics are certified RoHS-compliant with full traceability documentation.