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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

STMicroelectronics LM2904WD

Name: LM2904WD
Brand: STMicroelectronics
SKU: LM2904WD
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM2904WD

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: LM2904WD.pdf

Description:: IC OPAMP GP 2 CIRCUIT 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:3,785

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Product details

Overview

LM2904WD from STMicroelectronics is a low-power dual operational amplifier designed for single-supply operation in automotive and industrial control systems. It features 100 dB DC voltage gain, 1.1 MHz unity-gain bandwidth, 500 µA per channel supply current, ±2 nA input offset current, and rail-to-rail output swing (0 V to V_CC − 1.5 V) - enabling direct interfacing with +5 V logic systems.

For engineers reviewing the LM2904WD datasheet, LM2904WD pinout, LM2904WD application, or LM2904WD equivalent, key selection criteria include its automotive-grade qualification (AEC-Q100), temperature-compensated input bias current (20 nA), wide 3–30 V supply range, input common-mode range extending to negative rail, and SO-8 package compatibility with standard PCB assembly processes.

Technical Context

The LM2904WD integrates two independent high-gain op-amps with internal frequency compensation, eliminating external compensation components. Its input stage uses PNP transistors enabling common-mode voltage down to ground and differential input range equal to full supply voltage.

It operates linearly from a single supply (3–30 V), delivering 40 mA short-circuit output current and supporting output swing within 1.5 V of V_CC and to ground - critical for sensor signal conditioning and transducer amplification in battery-powered or 5 V–24 V industrial nodes.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3 V to 30 V - supports direct connection to 5 V logic rails and 24 V industrial buses without level-shifting.
DC Voltage Gain	100 dB - enables precise DC-coupled amplification with <1 mV error at G=100.
Unity-Gain Bandwidth	1.1 MHz - sufficient for audio-band filtering, motor feedback, and medium-speed sensor signal processing.
Supply Current per Channel	500 µA - allows dual-op-amp operation on microamp-level power budgets (e.g., battery-backed modules).
Input Offset Voltage	7 mV max (LM2904W) - sets baseline accuracy limit for precision DC gain blocks and summing circuits.
Input Bias Current	20 nA (typ, temp-compensated) - minimizes voltage error across high-impedance sensor sources (e.g., thermistors, photodiodes).
Output Voltage Swing	0 V to (V_CC − 1.5 V) - delivers full dynamic range into loads referenced to ground under single-supply conditions.
ESD Protection	2 kV HBM - provides robustness against handling and board-level electrostatic discharge in automotive assembly lines.

Pinout & Package

LM2904WD is supplied in an SO-8 (Small Outline-8) plastic micropackage, compliant with ECOPACK® environmental standards and optimized for automated surface-mount assembly.

Pin/Terminal	Circuit Role	Design Meaning
1	Inverting Input A	Accepts inverted-phase signal for A amplifier; input common-mode range includes ground.
2	Non-inverting Input A	Accepts non-inverted-phase signal for A amplifier; supports rail-to-rail common-mode input.
3	Output A	Amplified output of Channel A; swings 0 V to (V_CC − 1.5 V) with 40 mA short-circuit capability.
4	V_CC− (Ground)	Power reference terminal for single-supply operation; all inputs and outputs referenced to this node.
5	V_CC+	Positive supply rail (3–30 V); supplies both amplifiers; current draw independent of voltage magnitude.
6	Output B	Amplified output of Channel B; electrically isolated from Channel A; identical performance specs.
7	Inverting Input B	Independent inverting input for B amplifier; no crosstalk with Channel A under normal operation.
8	Non-inverting Input B	Independent non-inverting input for B amplifier; enables dual-channel signal conditioning on one die.

Key Features

Feature	Design Value
Internal Frequency Compensation	Eliminates need for external compensation capacitors - reduces BOM count and layout sensitivity in stable unity-gain configurations.
Rail-to-Rail Input Common-Mode Range	Includes negative rail (ground) - enables direct amplification of signals referenced to system ground without level-shifting circuitry.
Low Input Offset Current	2 nA max - ensures minimal error when driving high-impedance feedback networks (e.g., >1 MΩ gain-setting resistors).
Automotive Qualification	AEC-Q100 qualified - validated for operation from −40 °C to +125 °C with enhanced reliability screening for engine control, body electronics, and ADAS subsystems.
Single-Supply Operation	Operates from 3 V to 30 V - supports legacy 5 V, modern 3.3 V microcontrollers, and 24 V industrial PLC I/O modules.

Applications

Transducer Signal Conditioning

DC Gain Block for Industrial Sensors

Use Scenario: Amplifying low-level mV outputs from pressure, temperature, or load-cell transducers in automotive cabin modules.

IC Role / Device Role / Timing Role: Dual op-amp configured as instrumentation preamp (Ch. A) and reference buffer (Ch. B) in single-supply front-end.

Use Value: Input common-mode range to ground and 20 nA bias current preserve signal integrity from high-impedance sensors without external biasing.

Use Scenario: Providing fixed-gain amplification for 4–20 mA loop receivers or RTD bridge outputs in programmable logic controllers.

IC Role / Device Role / Timing Role: Dual-channel DC-coupled non-inverting amplifier (G = 10) with matched channels for differential sensing paths.

Use Value: 7 mV max input offset voltage and 100 dB gain ensure <0.1% gain error over temperature in closed-loop control feedback paths.

Automotive Body Control Unit (BCU)

Low-Power Battery Monitoring

Use Scenario: Monitoring window lift motor current, door lock actuator voltage, and ambient light sensor output in 12 V vehicle systems.

IC Role / Device Role / Timing Role: Dual op-amp used for current-sense amplification (Ch. A) and analog multiplexer buffering (Ch. B) in shared ADC input path.

Use Value: AEC-Q100 qualification and 125 °C operating range guarantee reliable operation near engine compartments and under-hood electronics.

Use Scenario: Measuring Li-ion cell voltage and charging current in portable diagnostic tools or telematics gateways with limited power budget.

IC Role / Device Role / Timing Role: Dual op-amp implementing precision voltage divider scaling (Ch. A) and current-sense amplifier (Ch. B) with 500 µA/channel quiescent current.

Use Value: Ultra-low supply current enables continuous monitoring during sleep mode while maintaining 1.1 MHz bandwidth for transient detection.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-power op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM2904DT	Same core architecture, SO-8 package, but commercial grade (−40 °C to +85 °C) and non-automotive qualified.	Lacks AEC-Q100 validation; unsuitable for under-hood or safety-critical modules requiring extended temperature compliance.	Select only for cost-sensitive consumer or non-automotive industrial designs where −40 °C to +125 °C operation is not required.
TSV912IDT	Higher GBW (8 MHz), lower input offset (1.5 mV typ), rail-to-rail output, but higher supply current (820 µA/ch) and no automotive qualification.	Better AC performance and DC accuracy, but incompatible with strict automotive thermal or ESD requirements.	Prefer for high-speed sensor interfaces where bandwidth >1 MHz is essential and automotive qualification is not mandated.

Compared with LM2904DT and TSV912IDT, the LM2904WD uniquely balances automotive-grade reliability, ultra-low quiescent current, and proven single-supply functionality - making it optimal for cost-constrained, thermally demanding automotive body electronics where long-term field stability is mandatory.

Availability

LM2904WD is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor signal conditioning, and low-power battery monitoring systems requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for LM2904WD 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

The LM2904W series belongs to ST's automotive-qualified precision analog portfolio, engineered specifically to replace legacy bipolar op-amps in harsh-environment control systems while maintaining pin compatibility and simplifying single-supply design.

FAQ

What is the maximum operating junction temperature for LM2904WD?

The LM2904WD has a maximum junction temperature of 150 °C, verified per absolute maximum ratings in ST's Doc ID 9893 Rev 11. This rating supports continuous operation in under-hood automotive environments when combined with appropriate PCB copper pour and thermal vias per SO-8 thermal resistance data (R_thJA = 125 °C/W).

Does LM2904WD support true rail-to-rail output swing?

No - LM2904WD delivers output swing from 0 V to (V_CC − 1.5 V) under load, as specified in electrical characteristics (Table 3). It achieves ground-referenced output but cannot reach V_CC; for full rail-to-rail output, consider ST's TSV912 or TSX912 families.

Can LM2904WD drive a 2 kΩ load at 5 V supply while maintaining linearity?

Yes - at V_CC = 5 V, LM2904WD delivers linear output swing up to 3.5 V (V_CC − 1.5 V) into 2 kΩ, with typical open-loop gain of 100 dB ensuring <0.1% distortion at 1 kHz (THD = 0.02%). Output current capability exceeds 20 mA, well above the 2.5 mA required by 2 kΩ at 5 V.

Is the LM2904WD pinout compatible with legacy LM2904 variants?

Yes - LM2904WD uses the industry-standard SO-8 pinout identical to LM2904DT, LM2904D, and LM2904VQDR. Pin 1 is Inverting Input A, Pin 2 is Non-inverting Input A, Pin 3 is Output A, Pin 4 is V_CC−, Pin 5 is V_CC+, Pin 6 is Output B, Pin 7 is Inverting Input B, and Pin 8 is Non-inverting Input B.

LM2904WD Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Amplifier Type:: General Purpose

Number of Circuits:: 2

Output Type:: Single-Ended

Slew Rate:: 0.6V/µs

Gain Bandwidth Product:: 1.1 MHz

-3db Bandwidth:: -

Current - Input Bias:: 20 nA

Voltage - Input Offset:: 2 mV

Current - Supply:: 700µA

Current - Output / Channel:: 40 mA

Voltage - Supply Span (Min):: 3 V

Voltage - Supply Span (Max):: 30 V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

LM2904WD FAQ

1.How can I place an order for LM2904WD through Aetrix?

Please submit a Request for Quotation (RFQ) for LM2904WD on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LM2904WD reliable?

The price and inventory of LM2904WD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904WD is usually 5 days.

3.What payment methods are accepted for LM2904WD?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904WD transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM2904WD?

LM2904WD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM2904WD order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LM2904WD?

For technical support, including LM2904WD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904WD requirements.

6.How does Aetrix verify that LM2904WD is sourced from the original manufacturer or authorized distributors?

All LM2904WD products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM2904WD meets industry standards.

7.What is the process for return or replacement of LM2904WD?

All LM2904WD units undergo pre-shipment inspection (PSI). If there is an issue with LM2904WD, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LM2904WD part is unused and in its original packaging.

Return procedure for LM2904WD:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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