Texas Instruments OPA2336E/2K5

Overview

OPA2336E/2K5 from Texas Instruments is a dual, single-supply, microPower CMOS operational amplifier optimized for battery-powered instrumentation. It features rail-to-rail output swing within 3mV of rails (RL = 100kΩ), 20µA quiescent current per amplifier, 125µV max input offset voltage, and operation from 2.3V to 5.5V - enabling precision signal conditioning in portable medical sensors and photodiode pre-amplifiers.

For engineers reviewing the OPA2336E/2K5 datasheet, OPA2336E/2K5 pinout, OPA2336E/2K5 application, or OPA2336E/2K5 equivalent, key selection criteria include ultra-low IQ for multi-year battery life, rail-to-rail output capability at sub-3mV error, low 1pA input bias current for high-impedance transducer interfaces, and guaranteed performance across –40°C to +85°C industrial temperature range.

Technical Context

The OPA2336E/2K5 implements a CMOS input stage with 10¹³ Ω || 4pF common-mode input impedance and unity-gain stability. Its rail-to-rail output stage uses complementary PMOS/NMOS drivers to achieve 3mV swing margin under light load, while maintaining 115dB open-loop gain and 80dB CMRR over the full common-mode range (–0.2V to V+–1V).

Designed for single-supply systems, it supports input voltages extending to the negative rail and tolerates inputs up to 0.3V beyond supplies without phase inversion. The dual-channel architecture features fully independent circuitry to minimize crosstalk (<0.1µV/V channel separation) and eliminate interaction between amplifiers.

Key Specifications

Pinout & Package

OPA2336E/2K5 is packaged in an 8-pin MSOP (VSSOP-8, DGK package), measuring 3.0mm × 3.0mm × 0.95mm with 0.5mm pitch - optimized for space-constrained portable PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual, micropower, rail-to-rail op-amp applications.

Compared with OPA2336E/2K5, OPA2340UA/2K5 trades 40× higher power for 10× more bandwidth, while MCP6022-E/SN offers lower cost but sacrifices 2× offset voltage and 5× quiescent current - making OPA2336E/2K5 optimal for ultra-low-power, high-precision DC signal chains.

Availability

OPA2336E/2K5 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 long production lifecycles.

Supply support for OPA2336E/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 op-amps and low-power signal conditioning solutions.

The OPA2336E/2K5 belongs to TI's microAmplifier™ series - designed specifically for ultra-low-power, high-accuracy analog signal acquisition in portable and energy-constrained systems.

FAQ

What is the maximum capacitive load the OPA2336E/2K5 can drive stably in unity-gain configuration?

The OPA2336E/2K5 can drive up to 300pF in unity-gain configuration with pure capacitive load. For larger loads (e.g., >300pF), a 50Ω–100Ω series resistor inside the feedback loop is recommended to maintain phase margin and prevent ringing. This technique is validated in TI's SBOS068C datasheet Figure 3 and enables stable operation with >1000pF loads when combined with appropriate resistive termination.

Does the OPA2336E/2K5 support operation below 2.3V supply voltage?

Yes, the OPA2336E/2K5 operates down to 2.1V, though full specifications (including 125µV max offset and 20µA IQ) are guaranteed only from 2.3V to 5.5V. At 2.1V, functionality remains intact - rail-to-rail output, 1pA input bias, and unity-gain stability are preserved - but parameters like GBW and slew rate degrade slightly. Designers should verify performance at 2.1V using TI's SBOS068C typical characteristics curves.

How does the OPA2336E/2K5 handle input voltages exceeding the supply rails?

The OPA2336E/2K5 input stage tolerates voltages up to 0.3V beyond V+ or V– without damage or phase inversion (per SBOS068C Absolute Maximum Ratings). However, inputs outside the common-mode range (–0.2V to V+–1V) may increase input bias current. To avoid excessive current, limit input current to ≤10mA using series resistors - as shown in Figure 2 of the datasheet - ensuring safe operation even with overvoltage transients.

What is the thermal resistance (θJA) of the OPA2336E/2K5 in its MSOP-8 package?

The OPA2336E/2K5 in the MSOP-8 (DGK) package has a junction-to-ambient thermal resistance (θJA) of 150°C/W, as specified in the SBOS068C datasheet Electrical Characteristics table. This value assumes standard JEDEC 2-layer board conditions. With 20µA per amplifier (40µA total), power dissipation remains <200µW at 5V, resulting in negligible temperature rise (<0.03°C) - eliminating thermal derating concerns in most portable applications.

Is the OPA2336E/2K5 pin-compatible with other members of the OPA336 family?

No - the OPA2336E/2K5 (MSOP-8) is not pin-compatible with the single-channel OPA336 (SOT23-5 or SO-8) or quad-channel OPA4336 (SSOP-16). While electrical specifications are aligned across the family, pinouts differ fundamentally: OPA2336E/2K5 uses an 8-pin dual-amplifier layout (V–, +In A, –In A, Out A, Out B, –In B, +In B, V+), whereas OPA336 variants have 5- or 8-pin single-amplifier configurations. PCB redesign is required for substitution.