Texas Instruments OPA2336EA/2K5

Overview

OPA2336EA/2K5 from Texas Instruments is a dual, rail-to-rail output, microPower CMOS operational amplifier designed for single-supply battery-powered systems. It delivers 125 µV max input offset voltage, 20 µA per amplifier quiescent current, and rail-to-rail output swing within 3 mV of supply rails at 100 kΩ load - enabling precision signal conditioning in portable medical instruments and photodiode pre-amplifiers.

For engineers reviewing the OPA2336EA/2K5 datasheet, OPA2336EA/2K5 pinout, OPA2336EA/2K5 application, or OPA2336EA/2K5 equivalent, key selection criteria include its 2.3 V to 5.5 V operating range, 1 pA input bias current, 115 dB open-loop gain, and MSOP-8 package compatibility with space-constrained PCB layouts.

Technical Context

The OPA2336EA/2K5 implements a unity-gain-stable CMOS input stage with common-mode input range extending to the negative rail (V– – 0.2 V), supporting true single-supply operation. Its rail-to-rail output stage uses complementary PMOS/NMOS drivers to achieve 3 mV swing margin under 100 kΩ load while maintaining >70 dB open-loop gain.

Each amplifier operates independently with no crosstalk, leveraging fully isolated internal circuitry. The device is specified across –40°C to +85°C and functions over –55°C to +125°C, with thermal resistance θ_JA = 150°C/W in the MSOP-8 package.

Key Specifications

Pinout & Package

OPA2336EA/2K5 is packaged in an 8-pin MSOP (VSSOP-8, DGK), measuring 3.0 mm × 3.0 mm × 1.0 mm with 0.65 mm pitch. This thermally enhanced surface-mount package supports automated assembly and delivers θ_JA = 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 OPA2336EA/2K5 uniquely balances ultra-low power (20 µA), ultra-low input bias (1 pA), and precision offset (125 µV max) in a miniature MSOP-8 - making it optimal for next-generation wearable diagnostics and energy-harvesting sensor nodes.

Availability

OPA2336EA/2K5 is available at Aetrix Electronics and suitable for battery-powered instrumentation, photodiode pre-amplifiers, and precision integrators requiring stable component supply across extended production lifecycles.

Supply support for OPA2336EA/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 OPA2336EA/2K5 belongs to TI's microAmplifier™ series - engineered specifically for ultra-low-power, high-precision signal conditioning in portable and remote-sensing applications.

FAQ

What is the maximum capacitive load the OPA2336EA/2K5 can drive in unity-gain configuration?

The OPA2336EA/2K5 can reliably drive up to 300 pF in unity-gain configuration without external compensation. For larger loads (e.g., >500 pF), a 50–100 Ω series resistor inside the feedback loop - as documented in TI's SBOS068C - restores phase margin and suppresses ringing. This design technique maintains DC accuracy while enabling stable operation with ADC input capacitance or long PCB traces.

Does the OPA2336EA/2K5 support operation below 2.3 V?

Yes, the OPA2336EA/2K5 operates down to 2.1 V, though electrical specifications are guaranteed only from 2.3 V to 5.5 V. At 2.1 V, parameters such as open-loop gain (AOL) and slew rate degrade slightly, but rail-to-rail output swing and microPower consumption remain functional - making it viable for end-of-life battery scenarios in portable devices.

How does the OPA2336EA/2K5 handle input voltages exceeding the supply rails?

The OPA2336EA/2K5 features diode-clamped inputs rated for ±0.3 V beyond V+ and V–. Inputs may exceed the supplies without phase inversion (per Figure 1 in SBOS068C), but current must be limited to ≤10 mA using a series resistor. Exceeding this current risks damage; the absolute maximum rating specifies input voltage as (V–) – 0.3 V to (V+) + 0.3 V.

Is the OPA2336EA/2K5 pin-compatible with other packages of the OPA2336 family?

No - the OPA2336EA/2K5 uses the MSOP-8 (DGK) package with specific pinout (V–, +In A, –In A, Out A, Out B, –In B, +In B, V+). It is not pin-compatible with the SO-8 (D) or DIP-8 versions, which have different pin assignments (e.g., NC pins and swapped input/output positions). Layout redesign is required when migrating between packages.

What is the thermal performance of the OPA2336EA/2K5 in its MSOP-8 package?

The OPA2336EA/2K5 in the MSOP-8 (DGK) package has a junction-to-ambient thermal resistance (θ_JA) of 150°C/W. At 20 µA per amplifier (40 µA total) and 5 V supply, power dissipation is ~0.2 mW, resulting in negligible self-heating (<0.03°C rise) under typical conditions - ensuring stable offset and gain behavior in thermally sensitive measurement systems.