Texas Instruments LM2902DRG3

Overview

LM2902DRG3 from Texas Instruments is a quad operational amplifier optimized for single-supply operation, featuring rail-to-rail input (common-mode range includes V–), 3V to 36V supply capability, ±3mV max input offset voltage at 25°C, 1.2MHz gain-bandwidth product, and 0.5V/μs slew rate. It serves as a precision signal conditioning and voltage-level translation IC in industrial power supplies and embedded control interfaces.

For engineers reviewing the LM2902DRG3 datasheet, LM2902DRG3 pinout, LM2902DRG3 application, or LM2902DRG3 equivalent, key selection criteria include its extended temperature range (–40°C to +125°C), low quiescent current (240µA per amplifier), integrated EMI/RF filtering, and drop-in compatibility with legacy LM2902 variants in SOIC-14 layouts.

Technical Context

The LM2902DRG3 implements four independent high-voltage op-amps in a single monolithic silicon die, each with unity-gain stability, common-mode input voltage extending to the negative rail, and output swing within 1.5V of the positive rail (at –50µA load) and within 150mV of the negative rail (at 50µA load). Its internal architecture supports robust operation under wide supply variation and harsh EMI environments.

Designed as the B-version successor to LM2902, it delivers improved specifications over prior generations: enhanced ESD rating (2kV HBM), tighter input offset voltage (±3mV max vs. ±7mV in standard LM2902), and guaranteed performance across –40°C to +125°C ambient - making it suitable for automotive-grade and industrial motor-control feedback loops.

Key Specifications

Pinout & Package

LM2902DRG3 is housed in a 14-pin SOIC (D package), measuring 8.65mm × 6mm, with gull-wing leads and standard JEDEC MS-012AC footprint. The package supports automated reflow soldering 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 LM2902DT and LM2902PW, the LM2902DRG3 uniquely combines industrial temperature range (–40°C to +125°C), 2kV HBM ESD protection, and SOIC-14 manufacturability - making it the preferred choice for automotive-qualified and high-reliability industrial control boards where thermal margin and long-term stability are critical.

Availability

LM2902DRG3 is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies, and HVAC control systems requiring stable component supply across extended temperature and long production lifecycles.

Supply support for LM2902DRG3 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 heritage in precision op-amps and industrial-grade signal chain solutions.

The LM2902 family was engineered for cost-sensitive, high-volume industrial and automotive applications demanding robust performance, wide supply range, and seamless backward compatibility - directly addressing design needs in power conversion, sensor interfacing, and real-time control systems.

FAQ

What is the maximum operating junction temperature for LM2902DRG3?

The absolute maximum junction temperature for LM2902DRG3 is 150°C, as specified in the TI datasheet Section 6.1. This limit applies across all operating conditions; sustained operation near this threshold may impact long-term reliability. Derating is recommended above 125°C ambient, especially in high-power dissipation configurations. LM2902DRG3's SOIC package has R_θJA = 99.3°C/W, so at 25°C ambient and 1mA total quiescent current, junction rise is ~100°C - well within safe margin.

Does LM2902DRG3 support true rail-to-rail output swing?

No, LM2902DRG3 does not provide rail-to-rail output swing. Its output can swing to within 1.5V of the positive rail (VCC+) at light load (–50µA) and to within 150mV of the negative rail (VCC–) at same load. At –1mA sink, positive swing degrades to ~1.4V from VCC+, and at 1mA source, negative swing extends to ~0.75V above VCC–. These limitations are documented in Section 6.6 Electrical Characteristics. LM2902DRG3 is rail-to-rail *input*, not output.

Can LM2902DRG3 replace LM2902 in existing designs without changes?

Yes, LM2902DRG3 is a drop-in replacement for standard LM2902 in SOIC-14 packages. It shares identical pinout, footprint, and basic electrical behavior while improving key parameters: input offset voltage (±3mV max vs. ±7mV), ESD rating (2kV HBM vs. 500V), and temperature range (–40°C to +125°C vs. –40°C to +105°C or +85°C). No PCB or schematic changes are needed, though layout review for thermal relief is advised in high-ambient applications.

What is the typical input bias current of LM2902DRG3 over temperature?

The typical input bias current of LM2902DRG3 is –10nA at 25°C and remains ≤–60nA across the full –40°C to +125°C operating range, per Section 6.6 of the TI datasheet. This low, stable bias current minimizes voltage errors in high-impedance networks (e.g., >100kΩ feedback resistors or sensor bridges), preserving accuracy in precision analog front-ends without requiring guard traces or active bias cancellation.

Is LM2902DRG3 qualified for automotive applications?

LM2902DRG3 is not AEC-Q200 qualified, though its –40°C to +125°C operating range and 2kV HBM ESD rating align with many automotive subsystem requirements (e.g., body control modules, HVAC actuators). For safety-critical or engine-bay applications, TI recommends AEC-Q100-qualified alternatives such as TLV27L4 or OPA4991Q. LM2902DRG3 is widely deployed in non-safety automotive ancillaries where qualification is not mandated.