Texas Instruments LM2904PW

Overview

LM2904PW from Texas Instruments is a dual general-purpose operational amplifier in TSSOP-8 package, designed for single-supply operation with rail-to-rail input (including ground) and 36V max supply range. It delivers 1.2MHz unity-gain bandwidth, 300µA/ch quiescent current, and ≤3mV input offset voltage at 25°C - enabling precision sensing and signal conditioning in motor control feedback loops and power supply monitoring circuits.

For engineers reviewing the LM2904PW datasheet, LM2904PW pinout, LM2904PW application, or LM2904PW equivalent, this page provides verified electrical specifications, validated TSSOP-8 terminal mapping, real-world use cases in industrial motor drives and AC inverters, and two confirmed alternative parts with documented functional and thermal differences.

Technical Context

The LM2904PW implements a bipolar-input, internally compensated two-stage op-amp architecture optimized for stability at unity gain. Its input stage supports common-mode voltages down to V– (ground in single-supply mode), while output swing reaches within 20mV of V– and 1.6V of V+ at 5mA load - critical for low-voltage sensor interfacing.

It features integrated RF/EMI filtering and 2kV HBM ESD protection, making it suitable for electrically noisy environments such as motor drive PCBs and industrial power converters where transient immunity is required without external shielding.

Key Specifications

Pinout & Package

TSSOP-8 (PW) package: 3mm × 6.4mm body, 0.65mm pitch, exposed pad optional (not electrically connected), RoHS-compliant, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2904DT and LM2904VQDR, the LM2904PW offers the smallest PCB area among functionally equivalent dual op-amps while maintaining full specification compliance - ideal for space-constrained industrial controllers where thermal margin is managed via copper pour rather than airflow.

Availability

LM2904PW is available at Aetrix Electronics and suitable for motor control feedback, AC inverter voltage sensing, and industrial power supply monitoring requiring stable component supply across extended temperature ranges and high-volume production cycles.

Supply support for LM2904PW 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 over 50 years of op-amp design heritage and broad industrial application expertise.

The LM2904PW belongs to TI's industry-standard dual op-amp product line, engineered for cost-sensitive, high-reliability applications in motor drives, power conversion, and factory automation systems where precision, ruggedness, and long-term supply stability are essential.

FAQ

What is the maximum supply voltage for LM2904PW?

The LM2904PW supports a maximum supply voltage of 36V across V+ to V– terminals. This rating applies to both single-supply (e.g., 0V and +36V) and split-supply (e.g., ±18V) configurations. Exceeding 36V risks permanent damage, as specified in Absolute Maximum Ratings. The device operates reliably from 3V to 36V, making it suitable for 24V industrial rails and 12V automotive auxiliary systems.

Does LM2904PW support rail-to-rail output swing?

No, the LM2904PW does not provide rail-to-rail output swing. Its output can swing to within approximately 20mV of V– and 1.6V of V+ at 5mA load. At lighter loads (e.g., 50µA), it achieves 100mV above V– and 1.35V below V+. This limited positive swing is inherent to its bipolar output stage and must be accounted for in feedback network design - especially in low-voltage applications where headroom is constrained.

Can LM2904PW replace LM2904DR in existing designs?

Yes, LM2904PW is a direct drop-in replacement for LM2904DR in most cases, as both share identical electrical specifications and pinout. However, the PW (TSSOP-8) package has different thermal characteristics (RθJA = 171.7°C/W) versus DR (SOIC-8, RθJA = 124.7°C/W), so thermal validation is required in high-power-density layouts. No PCB redesign is needed if footprint and solder mask are adapted for 0.65mm pitch.

What is the input offset voltage drift over temperature for LM2904PW?

The LM2904PW exhibits an input offset voltage drift of ±3.5 µV/°C to ±12 µV/°C across –40°C to +125°C, depending on unit variation and test conditions. This drift contributes to measurement error accumulation in precision DC-coupled circuits - for example, a 100°C temperature rise may add up to ±1.2mV additional offset beyond the 3mV 25°C maximum, affecting accuracy in long-duration sensor monitoring applications.

Is LM2904PW qualified for automotive applications?

The standard LM2904PW is not AEC-Q100 qualified and is intended for industrial and commercial use. For automotive applications, TI offers the LM2904VQDR variant, which undergoes additional stress testing and process controls to meet AEC-Q100 Grade 1 requirements (–40°C to +125°C). Using LM2904PW in automotive contexts requires full system-level qualification and is not recommended for safety-critical functions without supplemental validation.