Texas Instruments OPA2336U/2K5

Overview

OPA2336U/2K5 from Texas Instruments is a dual, rail-to-rail output, microPower CMOS operational amplifier designed for single-supply battery-powered systems. It delivers 125µV max input offset voltage, 20µA per amplifier quiescent current, and rail-to-rail output swing within 3mV of the rails (RL = 100kΩ), enabling precision signal conditioning in portable medical instruments and photodiode pre-amplifiers.

For engineers reviewing the OPA2336U/2K5 datasheet, OPA2336U/2K5 pinout, OPA2336U/2K5 application, or OPA2336U/2K5 equivalent, key selection criteria include its 2.3V to 5.5V supply range, 1pA input bias current, 115dB open-loop gain, and SOIC-8 package compatibility with space-constrained, low-power analog front-ends.

Technical Context

The OPA2336U/2K5 implements a CMOS input stage with rail-to-rail output stage, supporting operation down to 2.1V supply while maintaining full common-mode input range to the negative rail. Its unity-gain stable architecture enables direct use in precision integrators and sensor interfaces without external compensation.

Each amplifier operates independently with <0.1µV/V channel separation at DC, ensuring minimal crosstalk in dual-channel configurations. The device features ESD protection (HBM: 500V) and is specified over –40°C to +85°C, with extended operation from –55°C to +125°C.

Key Specifications

Pinout & Package

OPA2336U/2K5 is housed in an 8-pin SOIC (D) surface-mount package with standard industry footprint and thermal resistance θJA = 150°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP6022-I/SN and LTC1450CS8#PBF, the OPA2336U/2K5 uniquely balances sub-3V operation, rail-to-rail output, and 1pA input bias-making it optimal for high-impedance, long-life portable instrumentation where all three parameters are simultaneously required.

Availability

OPA2336U/2K5 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 multi-year production cycles.

Supply support for OPA2336U/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 specializing in analog and embedded processing technologies, with decades of expertise in precision signal chain solutions.

The OPA2336U/2K5 belongs to TI's microAmplifier™ series, engineered specifically for ultra-low-power, high-accuracy analog signal conditioning in portable and battery-constrained applications.

FAQ

What is the minimum operating supply voltage for the OPA2336U/2K5?

The OPA2336U/2K5 operates down to 2.1V, though it is fully specified from 2.3V to 5.5V. At 2.1V, key parameters such as offset voltage, gain, and output swing remain functional but may fall outside guaranteed limits. For production designs requiring guaranteed performance, use ≥2.3V supply.

Does the OPA2336U/2K5 support rail-to-rail input operation?

No-the OPA2336U/2K5 supports rail-to-rail *output* swing (within 3mV of V+ and V–), but its input common-mode range extends only to (V+) –1V and (V–) –0.2V. This means the inputs cannot be driven to the positive rail, limiting true rail-to-rail input capability.

Can the OPA2336U/2K5 drive capacitive loads, and what is the recommended approach?

Yes-the OPA2336U/2K5 can drive up to ~300pF in unity-gain configuration. For larger loads, insert a 50Ω–100Ω resistor inside the feedback loop (between output and inverting input). This maintains DC accuracy while improving phase margin and reducing ringing, as validated in TI's SBOS068C datasheet Figure 3.

What is the thermal resistance (θJA) of the OPA2336U/2K5 in its SOIC-8 package?

The OPA2336U/2K5 in SOIC-8 (package D) has a junction-to-ambient thermal resistance (θJA) of 150°C/W, measured under standard JEDEC JESD51-7 conditions (single-layer 1-in² copper pad). This value assumes proper PCB layout with adequate copper pour and thermal vias for heat dissipation.

Is the OPA2336U/2K5 pin-compatible with other members of the OPA336 family?

Yes-the OPA2336U/2K5 uses the same SOIC-8 pinout as the OPA2336U, OPA2336UA, and OPA2336UG4 variants. All share identical pin assignments (Pins 1–8: +In A, –In A, Out A, V–, V+, –In B, +In B, Out B), enabling drop-in replacement within the same package variant.