Texas Instruments LM324NSRE4

Overview

LM324NSRE4 from Texas Instruments is a quad operational amplifier in SOIC-14 package, designed for cost-sensitive industrial and consumer applications. It delivers rail-to-rail input capability (common-mode range includes V–), 1.2 MHz gain-bandwidth product, ±3 mV max input offset voltage at 25°C, 240 µA typical quiescent current per amplifier, and operates from 3V to 36V single-supply or ±18V dual-supply - enabling use in power supply monitoring, sensor signal conditioning, and analog front-end circuits.

For engineers reviewing the LM324NSRE4 datasheet, LM324NSRE4 pinout, LM324NSRE4 application, or LM324NSRE4 equivalent, key selection criteria include its guaranteed operation across –40°C to +85°C ambient, output swing within 1.5 V of positive rail and 100 mV of negative rail at light load, integrated EMI/RF filtering, and drop-in compatibility with legacy LM324 variants without layout changes.

Technical Context

The LM324NSRE4 implements a standard voltage-feedback op-amp architecture with internal frequency compensation for unity-gain stability. Its input stage uses PNP transistors enabling common-mode input down to the negative rail, while the output stage employs Class AB push-pull topology supporting rail-swing capability near V– and moderate sourcing/sinking (±20 mA short-circuit current).

It features low-input-bias-current design (≤35 nA max at 25°C), high open-loop gain (≥50 V/mV), and robust ESD protection (2 kV HBM). The device meets industrial temperature requirements and supports single-supply operation without level-shifting circuitry - critical for battery-powered and embedded control systems.

Key Specifications

Pinout & Package

LM324NSRE4 is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package measuring 8.65 mm × 6 mm, with standard 1.27 mm pitch and gull-wing leads. This surface-mount package supports automated assembly and provides thermal resistance R_θJA = 99.3°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad operational amplifier applications.

Compared with LM324DR and LM2902DT, LM324NSRE4 offers superior ESD robustness for factory automation interfaces and a balanced trade-off between industrial temperature compliance and SOIC manufacturability - making it optimal for general-purpose embedded analog signal chains where layout reuse and supply flexibility are priorities.

Availability

LM324NSRE4 is available at Aetrix Electronics and suitable for power supply monitoring, sensor signal conditioning, motor control feedback, and consumer appliance control requiring stable component supply across long production lifecycles.

Supply support for LM324NSRE4 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 experience delivering high-reliability, cost-optimized ICs for industrial, automotive, and consumer markets.

The LM324NSRE4 belongs to TI's legacy-standard quad op-amp product line, engineered for broad compatibility, ease of use, and rugged performance in cost-sensitive analog signal conditioning applications - particularly where single-supply operation and rail-to-rail input are essential.

FAQ

What is the maximum operating temperature range for LM324NSRE4?

The LM324NSRE4 is specified for operation from –40°C to +85°C ambient temperature. This industrial-grade range supports deployment in factory automation equipment, power supplies, and home appliances exposed to variable thermal environments. Its electrical characteristics - including input offset voltage, gain-bandwidth, and output drive - are guaranteed across this full range per TI's SLOS066AE datasheet revision.

Does LM324NSRE4 support true single-supply operation?

Yes, LM324NSRE4 supports true single-supply operation due to its rail-to-rail input stage that includes the negative supply rail (V–) in its common-mode voltage range. When V– is connected to ground, inputs can swing from 0 V to (V+) – 1.5 V, and outputs can swing within 100 mV of ground and 1.5 V below V+. This eliminates the need for external level-shifting components in sensor interfaces and low-voltage control circuits.

Is LM324NSRE4 pin-compatible with older LM324 variants?

Yes, LM324NSRE4 is a drop-in replacement for all standard LM324 variants in SOIC-14 packaging, including LM324N, LM324AN, and LM324DR. Pin assignments, electrical behavior, and thermal characteristics match the industry-standard 14-pin SOIC footprint. No PCB redesign or schematic modification is required when upgrading to LM324NSRE4, preserving layout integrity and qualification effort.

What is the typical quiescent current consumption of LM324NSRE4?

The LM324NSRE4 draws 240 µA typical quiescent current per amplifier at 5 V supply and 25°C, totaling ~960 µA for all four channels. At 36 V and –40°C to +85°C, quiescent current remains below 750 µA per amplifier. This ultra-low static power enables continuous operation in energy-constrained systems such as battery-backed monitors and always-on IoT edge nodes without compromising signal fidelity.

Can LM324NSRE4 drive capacitive loads directly?

LM324NSRE4 is characterized to safely drive up to 100 pF capacitive loads without oscillation, as verified by phase margin (56°) and settling time (4 µs to 0.1%) measurements. For loads exceeding 100 pF - such as long cables or ADC input filters - a series isolation resistor (e.g., 10–100 Ω) is recommended between the LM324NSRE4 output and the capacitance to maintain stability and prevent peaking or ringing.