Texas Instruments OPA336P

Overview

OPA336P from Texas Instruments is a single-supply, microPower CMOS operational amplifier designed for battery-powered instrumentation and portable devices. It features rail-to-rail output swing within 3 mV of the rails, 125 µV max input offset voltage, 20 µA quiescent current per amplifier, and operates from 2.3 V to 5.5 V - enabling precision signal conditioning in low-voltage, high-impedance applications such as photodiode pre-amplifiers.

For engineers reviewing the OPA336P datasheet, OPA336P pinout, OPA336P application, or OPA336P equivalent, this device is selected for ultra-low-power analog front-ends where supply headroom is constrained, input bias current must be ≤1 pA, and output swing must reach within millivolts of both supply rails under 100 kΩ load.

Technical Context

The OPA336P uses a CMOS input stage with 10¹³ Ω || 2 pF differential input impedance and achieves 115 dB open-loop gain at 25°C. Its rail-to-rail output stage delivers ±5 mA short-circuit current and supports stable operation with capacitive loads up to 300 pF in unity-gain configuration.

Input common-mode range extends from (V–) – 0.2 V to (V+) – 1 V, enabling true single-supply operation without phase inversion even when inputs exceed the positive rail - a key differentiator versus bipolar-input op amps. The device is unity-gain stable and specified across –40°C to +85°C.

Key Specifications

Pinout & Package

OPA336P is supplied in an 8-pin plastic DIP (dual in-line package), offering through-hole mounting compatibility for prototyping and legacy industrial PCBs. Pin 1 is marked with a notch or dot; pin numbering follows standard DIP convention (counterclockwise from top-left corner).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA340UA and TLV2462CP, the OPA336P uniquely combines DIP-8 through-hole packaging, 20 µA quiescent current, 1 pA input bias, and rail-to-rail output - making it irreplaceable in legacy-reliant, ultra-low-power analog designs where board space and power are constrained but hand-soldering or socketing is required.

Availability

OPA336P is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, photodiode-based optical sensors, and precision analog integrators requiring stable component supply across long-lifecycle industrial programs.

Supply support for OPA336P 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 amp design and manufacturing reliability.

The OPA336P belongs to TI's microAmplifier™ series - engineered specifically for ultra-low-power, single-supply operation in portable and battery-constrained systems where input bias current, offset voltage, and supply current are critical.

FAQ

What is the maximum operating supply voltage for the OPA336P?

The OPA336P has an absolute maximum supply voltage rating of 7.5 V, but its specified operating range is 2.3 V to 5.5 V. Operation above 5.5 V voids parametric guarantees and risks exceeding internal junction temperature limits. For reliable long-term performance in battery-powered systems, maintain VS ≤ 5.5 V - especially important when using fresh alkaline cells that can reach 1.6 V per cell.

Does the OPA336P support rail-to-rail input common-mode range?

No - the OPA336P supports rail-to-rail *output*, but its input common-mode range extends only from (V–) – 0.2 V to (V+) – 1 V. This means the inputs cannot reach the positive rail, unlike true rail-to-rail input op amps. However, the OPA336P does not invert phase when inputs exceed the supply rails, a behavior confirmed in Figure 1 of the SBOS068C datasheet - making it robust against transient overvoltage on sensor inputs.

Can the OPA336P drive capacitive loads, and what is the recommended approach?

Yes - the OPA336P can drive up to ~300 pF in unity-gain configuration without external compensation. For larger capacitive loads (e.g., >500 pF), TI recommends inserting a 50 Ω to 100 Ω resistor inside the feedback loop (between output and inverting input), as shown in Figure 3 of SBOS068C. This maintains DC accuracy while improving phase margin; placing the resistor outside the loop introduces a DC gain error proportional to RS/(RS + RL).

Is the OPA336P pin-compatible with other packages of the OPA336 family?

No - the OPA336P (DIP-8) is not pin-compatible with the SOT-23-5 or SO-8 variants of the OPA336. The DIP-8 version has NC pins at positions 5, 6, and 8, while the SO-8 version places V+ at Pin 7 and V– at Pin 4, and the SOT-23-5 uses a completely different 5-pin layout. Board redesign is required when migrating between packages; consult the "PACKAGE DRAWING" section of SBOS068C for exact pin mappings.

What is the guaranteed input offset voltage drift over temperature for the OPA336P?

The OPA336P has a typical offset voltage drift of ±1.5 µV/°C, with production distribution showing >99% of units below 3 µV/°C (Figure 5, SBOS068C). This drift value is measured across the full –40°C to +85°C specified temperature range and directly impacts long-term accuracy in uncalibrated systems - for example, contributing ≤0.15 mV error over a 100°C span, which is critical in thermocouple or RTD signal conditioning.