Texas Instruments OPA2336UA

Overview

OPA2336UA from Texas Instruments is a dual, single-supply, microPower CMOS operational amplifier optimized for battery-powered instrumentation. It delivers rail-to-rail output swing within 3 mV of the rails (at 100 kΩ load), 125 µV max input offset voltage, and ultra-low 20 µA per-amplifier quiescent current across 2.3 V to 5.5 V supply range - enabling precision signal conditioning in portable medical devices and photodiode pre-amplifiers.

For engineers reviewing the OPA2336UA datasheet, OPA2336UA pinout, OPA2336UA application, or OPA2336UA equivalent, this page provides verified package mapping (SOIC-8), confirmed dual-channel independent operation, rail-to-rail output behavior, low-input-bias-current (1 pA) design implications, and validated alternatives for low-power precision amplification in space-constrained, long-life battery systems.

Technical Context

The OPA2336UA implements a CMOS input stage with input common-mode range extending to the negative rail (–0.2 V) and up to (V+) – 1 V, enabling true single-supply operation without level-shifting circuitry. Its unity-gain-stable architecture supports stable operation with capacitive loads up to 300 pF in G = 1 configuration, and up to 1000 pF when combined with a 100 Ω series resistor in the feedback path.

Each amplifier features fully independent circuitry - eliminating crosstalk between channels - and operates over –40°C to +85°C with guaranteed performance at 2.3 V minimum supply. The device's 115 dB open-loop gain, 100 kHz gain-bandwidth product, and 0.03 V/µs slew rate support precision DC and low-frequency AC applications including integrators and sensor front-ends.

Key Specifications

Pinout & Package

OPA2336UA 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 is 150°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, low-power precision amplifier applications.

Compared with OPA2336UA, OPA2340UA trades 11× higher quiescent current for 55× greater bandwidth, while MCP6022-I/SN offers lower cost at the expense of 2× offset voltage and reduced battery runtime - making OPA2336UA optimal for ultra-low-power, high-DC-accuracy dual-channel applications.

Availability

OPA2336UA is available at Aetrix Electronics and suitable for battery-powered medical instruments, portable test equipment, photodiode-based optical sensors, and precision integrator circuits requiring stable component supply across extended production lifecycles.

Supply support for OPA2336UA 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 technologies, with decades of expertise in precision op-amps and low-power signal chain solutions.

The OPA2336UA belongs to TI's microAmplifier™ series - designed specifically for ultra-low-power, high-accuracy analog signal conditioning in space- and energy-constrained portable and medical electronics.

FAQ

What is the absolute maximum supply voltage for the OPA2336UA?

The OPA2336UA has an absolute maximum supply voltage of 7.5 V across V+ and V– pins. Exceeding this rating may cause permanent damage. The device is specified for normal operation from 2.3 V to 5.5 V, with functional operation down to 2.1 V - making it ideal for single-cell Li-ion (2.7–4.2 V) and alkaline (2.4–4.5 V) battery systems. Always observe derating guidelines for reliability in high-temperature environments.

Can the OPA2336UA drive capacitive loads, and what is the recommended approach?

Yes, the OPA2336UA can drive capacitive loads up to 300 pF in unity-gain configuration without external compensation. For larger loads (up to 1000 pF), TI recommends adding a 50–100 Ω resistor inside the feedback loop - between the output and inverting input - to maintain phase margin and prevent oscillation. This technique preserves DC accuracy while improving transient response in photodiode transimpedance or filter applications.

Does the OPA2336UA feature rail-to-rail input capability?

No, the OPA2336UA does not have rail-to-rail input. Its input common-mode voltage range extends from (V–) – 0.2 V to (V+) – 1 V. While the output is rail-to-rail (within 3 mV), the input cannot swing to the positive rail. This design enables robust operation with single-supply configurations where the negative input is referenced near ground, but requires attention when biasing high-side sensors.

What is the thermal resistance (θ_JA) of the OPA2336UA in its SOIC-8 package?

The OPA2336UA in the SOIC-8 (D) package has a junction-to-ambient thermal resistance (θ_JA) of 150°C/W under standard JEDEC PCB conditions (2s2p copper). This value assumes no additional copper pour or thermal vias. For continuous operation at 85°C ambient with 5.5 V supply, the resulting junction temperature remains within safe limits (<125°C) given its 20 µA per-amplifier quiescent dissipation.

How does the OPA2336UA handle input voltages exceeding the supply rails?

The OPA2336UA input terminals are diode-clamped to the supply rails, allowing momentary input overvoltage up to ±0.3 V beyond V+ or V– without damage - provided input current is limited to ≤10 mA using a series resistor. Unlike some op-amps, it exhibits no phase inversion when inputs exceed the rails, preserving signal integrity during transient events in sensor interfaces.