Texas Instruments LM224DRG4

Overview

LM224DRG4 from Texas Instruments is a quad operational amplifier in SOIC-14 package, designed for cost-sensitive industrial and consumer applications requiring rail-to-rail input (V– included), 3V–36V supply operation, ±3mV max input offset voltage, and 1.2MHz gain-bandwidth product. It serves as a general-purpose signal conditioning and amplification IC in power supply feedback loops, sensor interfaces, and analog front-ends.

For engineers reviewing the LM224DRG4 datasheet, LM224DRG4 pinout, LM224DRG4 application, or LM224DRG4 equivalent, this page delivers verified electrical specs, validated pin functions, real-world use cases, and two confirmed alternative parts with documented functional and thermal differences - all specific to the LM224DRG4 variant and its SOIC-14 packaging.

Technical Context

The LM224DRG4 implements four independent high-voltage op-amps in a single monolithic silicon die, each featuring unity-gain stability, common-mode input range extending to V–, and output swing within 1.5V of V+ and 100mV of V– at 1mA load. Its internal architecture supports single-supply operation without level-shifting circuitry.

It operates across –25°C to +85°C ambient temperature, draws 240µA per amplifier typical quiescent current, and achieves 70dB minimum CMRR and 65dB PSRR over full supply and temperature range - enabling robust performance in noisy power environments such as AC inverters and multi-function printers.

Key Specifications

Pinout & Package

LM224DRG4 uses the D (SOIC-14) package: 8.65mm × 6mm body, 1.27mm pitch, gull-wing leads, JEDEC MS-012 compliant. 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 LM224DRG4, LM324DR trades precision for lower cost in commercial-grade applications, while LM2902DR prioritizes thermal resilience over DC accuracy - making LM224DRG4 the optimal balance of offset performance, temperature capability (–25°C to +85°C), and industrial supply voltage support.

Availability

LM224DRG4 is available at Aetrix Electronics and suitable for merchant network power supplies, desktop motherboard voltage monitoring, and indoor air conditioner control systems requiring stable component supply across multi-year production cycles.

Supply support for LM224DRG4 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, with over 50 years of op-amp innovation and broad manufacturing scale.

The LM224DRG4 belongs to TI's legacy LMx24 family of general-purpose quad op-amps, engineered for reliability and ease of use in cost-sensitive industrial, appliance, and computing applications where moderate precision and wide supply range are essential.

FAQ

What is the maximum operating temperature for the LM224DRG4?

The LM224DRG4 is rated for operation from –25°C to +85°C ambient temperature. This range is defined in the device's Recommended Operating Conditions table and reflects its qualification as an industrial-grade part. Exceeding +85°C may degrade offset voltage stability and increase quiescent current beyond specifications. The LM224DRG4's SOIC-14 package has a junction-to-ambient thermal resistance of 99.3°C/W, so PCB layout and airflow must ensure TJ remains ≤150°C under worst-case load.

Does the LM224DRG4 support single-supply operation?

Yes, the LM224DRG4 supports true single-supply operation. Its common-mode input voltage range extends to V– (typically ground), and its output can swing within 100mV of V– at light loads. When powered from a single 12V rail with V– tied to ground, it can amplify signals from 0V to 10.5V at the input and deliver outputs from 0.1V to 10.5V - making it suitable for sensor interfaces and ADC drivers without dual-rail supplies. The LM224DRG4 data sheet explicitly confirms this capability in Section 6.3.

What is the input offset voltage specification for LM224DRG4?

The LM224DRG4 has a maximum input offset voltage of ±3mV at 25°C, with ±4mV maximum over its full operating temperature range (–25°C to +85°C). This value is specified in Table 6-7 of the official TI datasheet for non-B/BA versions. It is higher than the ±2mV of LM324BA but tighter than the ±7mV of standard LM324DR - positioning LM224DRG4 as a mid-tier precision option within the LMx24 family for applications needing better DC accuracy than baseline parts but not requiring BA-grade performance.

Can LM224DRG4 replace LM324 in existing designs?

Yes, the LM224DRG4 is a direct drop-in replacement for LM324 in SOIC-14 footprint designs. Both share identical pinout, electrical specifications (including ±3mV max V_OS, 1.2MHz GBW, and 240µA I_Q), and SOIC-14 packaging. TI documentation confirms LM224 variants are functionally equivalent to LM324 across supply range (3V–36V), temperature range (–25°C to +85°C), and AC/DC performance. No schematic or layout changes are required when substituting LM224DRG4 for LM324DR or LM324D.

What is the capacitive load drive capability of LM224DRG4?

The LM224DRG4 is characterized to safely drive capacitive loads up to 100pF without oscillation, as stated in its Electrical Characteristics table (Section 6.5). This value applies under unity-gain configuration with RL ≥ 10kΩ. Driving larger capacitive loads - such as long cables or ADC input capacitors - requires isolation with a series resistor (typically 10–100Ω) or use of a dedicated buffer stage. The 100pF limit ensures phase margin remains ≥56°, preserving stability in closed-loop configurations like active filters and integrators.