My Inquiry
My Account
STMicroelectronics LM2904WDT
- Part No.:
- LM2904WDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2904WDT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,504
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2904WDT from STMicroelectronics is a low-power dual operational amplifier designed for single-supply automotive and industrial control systems. It features 100 dB DC voltage gain, 1.1 MHz unity-gain bandwidth, 500 µA per channel supply current, rail-to-rail input common-mode range (including negative rail), and output swing from 0 V to (VCC − 1.5 V). It is commonly used in transducer amplifiers and DC gain blocks operating from +5 V logic supplies.
For engineers reviewing the LM2904WDT datasheet, LM2904WDT pinout, LM2904WDT application, or LM2904WDT equivalent, key selection criteria include its automotive-grade qualification (AEC-Q100), temperature-compensated input bias current (20 nA), internal frequency compensation, and compatibility with single-supply 3–30 V operation in noise-sensitive analog front-ends.
Technical Context
The LM2904WDT integrates two independent high-gain op-amps with internally compensated dominant-pole architecture, enabling stable unity-gain operation without external components. Its input stage uses PNP transistors to achieve input common-mode voltage down to the negative rail and differential input range equal to the full supply voltage.
Output stage design supports large-swing capability (0 V to VCC − 1.5 V) under load, with short-circuit protection limiting sink/source current to 20–60 mA depending on supply and output voltage. ESD protection is rated at 2 kV HBM, and thermal resistance (RthJA) is 125 °C/W in SO-8 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V - enables direct interface with 5 V logic rails and robust operation in 12/24 V automotive systems. |
| DC Voltage Gain | 100 dB - ensures high precision in closed-loop configurations such as sensor signal conditioning. |
| Unity-Gain Bandwidth | 1.1 MHz - supports audio-frequency and low-speed control loop applications with predictable stability. |
| Supply Current per Channel | 500 µA - allows battery-powered or energy-constrained designs with minimal quiescent power impact. |
| Input Bias Current | 20 nA (temp-compensated) - minimizes offset drift and leakage errors in high-impedance sensor interfaces. |
| Input Offset Voltage | 2 mV (typ., LM2904W) - defines baseline accuracy in DC-coupled amplification without trimming. |
| Common-Mode Input Range | Includes negative rail (0 V) - permits ground-referenced inputs in single-supply configurations. |
| Output Voltage Swing | 0 V to (VCC − 1.5 V) - delivers usable dynamic range near ground and supply rails for ADC interfacing. |
Pinout & Package
LM2904WDT is supplied in an SO-8 (Small Outline) plastic micropackage, RoHS-compliant and qualified per AEC-Q100 Grade 1 (−40 °C to +125 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input A | Negative input of first op-amp; accepts feedback network for inverting configuration. |
| 2 | Non-inverting Input A | Positive input of first op-amp; used for non-inverting gain or reference biasing. |
| 3 | Output A | Amplified output of first op-amp; drives loads up to 40 mA with rail-to-rail swing capability. |
| 4 | VCC− (GND) | Negative supply terminal; serves as circuit ground reference for single-supply operation. |
| 5 | VCC+ | Positive supply terminal; accepts 3–30 V DC; powers both amplifiers and defines output swing limits. |
| 6 | Output B | Amplified output of second op-amp; electrically isolated from Output A; shares same supply pins. |
| 7 | Inverting Input B | Negative input of second op-amp; supports dual-channel signal processing in compact layouts. |
| 8 | Non-inverting Input B | Positive input of second op-amp; enables independent gain setting or common-mode rejection in differential pairs. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Frequency Compensation | Enables stable unity-gain operation without external capacitors-reduces BOM count and layout sensitivity. |
| Rail-to-Rail Input Common-Mode Range | Includes negative rail (0 V), allowing ground-referenced sensors and single-supply transducer interfaces. |
| Low Input Offset Current | 2 nA (max) - critical for matched-input applications like differential amplifiers where current mismatch causes error. |
| Automotive Qualification | AEC-Q100 Grade 1 certified - validated for reliability in engine control units, body electronics, and ADAS subsystems. |
| ESD Protection | 2 kV HBM - enhances robustness during board handling and system integration in industrial environments. |
| Wide Temperature Range | −40 °C to +125 °C - ensures consistent performance across under-hood and factory-floor operating conditions. |
Applications
| Transducer Signal Conditioning | Automotive Cabin Sensor Interface |
|---|---|
|
Use Scenario: Amplifying low-level output from resistive temperature detectors (RTDs) or pressure sensors in HVAC control modules. IC Role / Device Role / Timing Role: Dual-channel DC-coupled amplifier providing gain and offset adjustment before ADC sampling. Use Value: Input common-mode range including ground enables direct connection to grounded sensor elements; 20 nA input bias current prevents loading errors in high-Z bridges. |
Use Scenario: Signal conditioning for seat occupancy detection using capacitive or piezoelectric sensors. IC Role / Device Role / Timing Role: First-stage amplifier in analog front-end, rejecting common-mode noise while preserving low-frequency occupancy signals. Use Value: 100 dB open-loop gain ensures precise DC gain accuracy; AEC-Q100 qualification guarantees long-term reliability in passenger cabin environments. |
| Industrial PLC Analog Input Module | Single-Supply Audio Preamp |
|
Use Scenario: Scaling and buffering 4–20 mA current loop signals into 0–3.3 V for microcontroller ADCs. IC Role / Device Role / Timing Role: Transimpedance and level-shifting amplifier converting current to voltage with rail-compatible output swing. Use Value: Output swing to 0 V allows full utilization of 3.3 V ADC reference; 500 µA/channel supply current supports dense channel packing. |
Use Scenario: Low-noise microphone preamplifier in portable diagnostic equipment powered from USB 5 V. IC Role / Device Role / Timing Role: High-gain, low-distortion (0.02% THD) AC-coupled amplifier with adjustable gain via external resistors. Use Value: 55 nV/√Hz input noise and 1.1 MHz GBP preserve audio fidelity up to 20 kHz; SO-8 package enables compact PCB layout. |
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 |
|---|---|---|---|
| LM2904DR | Same core architecture but not AEC-Q100 qualified; higher max input offset voltage (7 mV vs. 2 mV typ.) | Suitable for commercial-grade industrial controls where automotive reliability is not required. | Select when cost sensitivity outweighs automotive qualification needs and wider offset tolerance is acceptable. |
| TSV912IDT | Higher GBW (8 MHz), lower input noise (24 nV/√Hz), but higher supply current (880 µA/ch) and no AEC-Q100 grade | Better for wideband sensor signal chains (e.g., vibration monitoring), less suitable for ultra-low-power battery use. | Choose when bandwidth and noise performance dominate over quiescent current and automotive compliance. |
Compared with LM2904DR, LM2904WDT offers tighter offset and guaranteed automotive qualification; versus TSV912IDT, it trades bandwidth and noise for half the supply current and proven under-hood reliability-making it optimal for cost- and power-constrained automotive analog sensing.
Availability
LM2904WDT is available at Aetrix Electronics and suitable for automotive cabin electronics, industrial PLC analog input modules, and transducer signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2904WDT 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, MCU, power, and automotive ICs with focus on industrial and automotive reliability.
The LM2904WDT belongs to ST's precision analog op-amp product line, engineered specifically for robust single-supply operation in harsh environments-including engine compartments and factory automation systems.
FAQ
Is LM2904WDT pin-compatible with standard LM2904 variants?
Yes, LM2904WDT uses the industry-standard SO-8 footprint and identical pinout to LM2904, LM2904DT, and LM2904DR. Pin assignments for inputs, outputs, and supply terminals match exactly-enabling drop-in replacement in existing designs without layout changes.
What is the maximum output current capability of LM2904WDT?
LM2904WDT delivers up to 40 mA source/sink current per channel under typical conditions (VCC = +15 V), with short-circuit duration rated as infinite. At VCC = +5 V, sink current is 10–12 mA and source current is limited by headroom to ~20 mA into 2 kΩ load.
Does LM2904WDT support rail-to-rail output swing?
No-LM2904WDT provides output swing from 0 V to (VCC − 1.5 V), not full rail-to-rail. This 1.5 V headroom limitation is inherent to its bipolar output stage and must be accounted for when interfacing with 3.3 V or 5 V ADC references.
Can LM2904WDT operate from a 3.3 V supply?
Yes, LM2904WDT is fully specified down to 3 V supply voltage. At 3.3 V, it maintains functional input common-mode range (0 V to 1.8 V), 500 µA/channel supply current, and usable output swing (0 V to ~1.8 V), making it viable for low-voltage industrial IoT nodes.
LM2904WDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
LM2904WDT FAQ
1.How can I place an order for LM2904WDT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904WDT 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 LM2904WDT reliable?
The price and inventory of LM2904WDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904WDT is usually 5 days.
3.What payment methods are accepted for LM2904WDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904WDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904WDT?
LM2904WDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904WDT 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 LM2904WDT?
For technical support, including LM2904WDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904WDT requirements.
6.How does Aetrix verify that LM2904WDT is sourced from the original manufacturer or authorized distributors?
All LM2904WDT 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 LM2904WDT meets industry standards.
7.What is the process for return or replacement of LM2904WDT?
All LM2904WDT units undergo pre-shipment inspection (PSI). If there is an issue with LM2904WDT, 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 LM2904WDT part is unused and in its original packaging.
Return procedure for LM2904WDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2904WDT Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
