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

STMicroelectronics LM2904ST

Name: LM2904ST
Brand: STMicroelectronics
SKU: LM2904ST
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM2904ST

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Datasheet:: LM2904ST.pdf

Description:: IC OPAMP GP 2 CIRCUIT 8MINISO

Quantity:: RFQ Add To RFQ list

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Inventory:3,669

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Product details

Overview

LM2904ST from STMicroelectronics is a dual, low-power operational amplifier optimized for single-supply operation in automotive and industrial control systems. It features 100 dB large-signal voltage gain, 1.1 MHz unity-gain bandwidth, 20 nA input bias current, rail-to-rail output swing (0 V to V_CC − 1.5 V), and operates from 3 V to 30 V supply. It is commonly used in transducer amplification and DC gain blocks within 5 V logic-compatible interfaces.

For engineers reviewing the LM2904ST datasheet, LM2904ST pinout, LM2904ST application, or LM2904ST equivalent, key selection criteria include input offset voltage (≤7 mV typ.), temperature-compensated supply current (≤1.2 mA at 5 V), common-mode input range extending to negative rail, and compatibility with MiniSO8 PCB layout constraints for space-constrained automotive modules.

Technical Context

The LM2904ST integrates two independent, internally frequency-compensated op-amps with PNP-input stages enabling input common-mode voltage down to the negative rail (V_CC−). Its architecture supports stable unity-gain operation without external compensation across its full 3–30 V supply range.

It delivers 0.6 V/µs slew rate and 1.1 MHz gain-bandwidth product at 30 V supply, with 70–85 dB common-mode rejection and 65–100 dB supply voltage rejection - critical for noise-immune sensor signal conditioning in 12 V vehicle electrical environments.

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 12/24 V automotive systems without level-shifting.
Input Offset Voltage	2–7 mV (typ.) - ensures ≤±7 mV DC error in precision DC gain blocks and sensor front-ends at room temperature.
Large-Signal Voltage Gain	100 dB (min. 50 dB) - provides ≥100,000× open-loop gain for high-accuracy closed-loop configurations.
Unity-Gain Bandwidth	1.1 MHz (typ.) - supports stable amplification of signals up to ~100 kHz in unity-gain follower or active filter applications.
Input Bias Current	20 nA (typ.) - minimizes voltage drop across high-impedance source networks (e.g., thermistor or photodiode interfaces).
Output Voltage Swing	0 V to (V_CC+ − 1.5 V) - allows near-ground-level output in single-supply mode, essential for interfacing with ADC reference thresholds.
Supply Current per Amplifier	0.35–0.6 mA (typ. at 5 V) - enables low-quiescent-current operation in battery-backed or always-on automotive subsystems.

Pinout & Package

LM2904ST is supplied in MiniSO8 package (3.0 mm × 4.9 mm, 1.27 mm pitch), a compact, surface-mount variant of SO8 with reduced height (0.85 mm typ.) suitable for automotive PCBs with tight Z-axis clearance.

Pin/Terminal	Circuit Role	Design Meaning
1 - Out1	Amplifier 1 output	Drives load directly; swing limited to 0 V to (V_CC+ − 1.5 V); requires no pull-up for rail-to-rail compatible loads.
2 - In1−	Amplifier 1 inverting input	Differential node accepting feedback network; input bias current flows out of this pin (PNP input stage).
3 - In1+	Amplifier 1 non-inverting input	High-impedance reference node; common-mode range includes V_CC− (ground in single-supply use).
4 - V_CC−	Negative supply / ground	Reference return for both amplifiers and internal biasing; must be low-impedance for CMRR integrity.
5 - In2+	Amplifier 2 non-inverting input	Independent high-Z node; identical electrical behavior to Pin 3; supports dual-channel signal processing.
6 - In2−	Amplifier 2 inverting input	Matches Pin 2 function; enables separate feedback paths for each amplifier without crosstalk.
7 - Out2	Amplifier 2 output	Electrically isolated from Out1; channel separation >120 dB at 1–20 kHz prevents inter-channel coupling.
8 - V_CC+	Positive supply	Power rail for both amplifiers; supply current independent of voltage magnitude - simplifies thermal design across 5–24 V operation.

Key Features

Feature	Design Value
Internal frequency compensation	Enables stable unity-gain operation without external capacitors - reduces BOM count and layout sensitivity in cost-sensitive automotive ECUs.
Input common-mode range includes negative rail	Allows direct sensing of 0 V-referenced signals (e.g., current shunt monitors) without level-shifting circuitry.
Low input bias current (20 nA)	Permits use with MΩ-range feedback and source impedances in high-precision instrumentation without significant DC error.
Rail-to-rail output swing (0 V to V_CC+ − 1.5 V)	Maximizes dynamic range in single-supply systems - e.g., 0–3.5 V output from 5 V rail improves ADC utilization efficiency.
Enhanced ESD protection (2 kV HBM)	Meets AEC-Q100 stress requirements for under-hood modules exposed to handling and assembly electrostatic events.

Applications

Automotive Cabin Temperature Sensing

Industrial 4–20 mA Loop Receiver

Use Scenario: Amplifying output of NTC thermistor biased from 5 V rail in HVAC control module.

IC Role / Device Role / Timing Role: DC-coupled non-inverting amplifier with gain = 101, referenced to ground, operating from single 5 V supply.

Use Value: Input common-mode range including ground enables direct thermistor connection; 7 mV max offset ensures <±0.5°C measurement error over −40°C to 85°C.

Use Scenario: Converting 4–20 mA loop current to 0.5–2.5 V for MCU ADC input in PLC analog input card.

IC Role / Device Role / Timing Role: Transimpedance amplifier with 125 Ω feedback resistor, powered from 24 V rail with local 5 V LDO.

Use Value: 100 dB gain ensures precise current-to-voltage conversion; 20 nA input bias introduces <0.003% gain error at 20 mA full scale.

Automotive Battery Voltage Monitor

Consumer Appliance Motor Speed Feedback

Use Scenario: Scaling 0–16 V battery voltage to 0–3.3 V for 3.3 V microcontroller ADC in body control module.

IC Role / Device Role / Timing Role: Precision resistive divider buffer with unity-gain follower configuration on second amplifier channel.

Use Value: Output swing to 0 V enables full 0–3.3 V range; 1.1 MHz bandwidth rejects switching noise from adjacent DC-DC converters.

Use Scenario: Conditioning Hall-effect sensor output (0.5–4.5 V) in washing machine motor driver board.

IC Role / Device Role / Timing Role: AC-coupled inverting amplifier with gain = −10, rejecting common-mode ripple from motor power stage.

Use Value: 85 dB CMRR suppresses 120 Hz ripple from rectified AC; low 0.6 V/µs slew rate prevents aliasing in 10 kHz PWM environment.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM2904DT (SO8)	Same electrical specs; larger SO8 footprint (4.9 × 6.0 mm vs. MiniSO8's 3.0 × 4.9 mm); higher R_thJA (125 °C/W vs. 190 °C/W).	Better suited for prototyping or legacy boards with SO8 land patterns; less optimal for high-density automotive PCBs.	Select when SO8 compatibility or through-hole rework capability is required; avoid where MiniSO8's smaller size and lower thermal resistance are critical.
LM2904PT (TSSOP8)	Identical performance; TSSOP8 package (3.0 × 4.4 mm) offers 0.65 mm pitch and 120 °C/W R_thJA; wettable flank option available for automated optical inspection.	Preferred for automated SMT lines requiring AOI-verified solder joints; slightly taller than MiniSO8 but narrower.	Choose for high-volume automotive production where AOI traceability and fine-pitch process control outweigh MiniSO8's height advantage.

Compared with LM2904DT and LM2904PT, the LM2904ST offers the lowest profile among ST's LM2904 variants - critical for under-dash modules with strict Z-height limits - while maintaining identical DC accuracy and noise performance across all three packages.

Availability

LM2904ST is available at Aetrix Electronics and suitable for automotive cabin control, industrial 4–20 mA signal conditioning, and consumer appliance motor feedback systems requiring stable component supply across extended temperature ranges (−40°C to +125°C).

Supply support for LM2904ST 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 silicon solutions for automotive, industrial, and power management applications.

The LM2904 series belongs to ST's precision analog portfolio, engineered specifically for robust, low-cost signal conditioning in harsh-environment automotive and industrial control systems - emphasizing wide supply range, rail-compatible inputs/outputs, and AEC-Q100 qualification.

FAQ

Is LM2904ST qualified for automotive applications?

Yes. LM2904ST is manufactured and tested to AEC-Q100 Grade 1 standards (−40°C to +125°C), with enhanced ESD protection (2 kV HBM) and screening per AEC-Q001/Q002. Its MiniSO8 package is widely deployed in automotive body control modules, HVAC systems, and battery monitoring units.

Can LM2904ST operate from a single 3.3 V supply?

Yes. The LM2904ST functions down to 3 V supply, making it compatible with 3.3 V systems. However, output swing is limited to 0 V to (V_CC+ − 1.5 V), so maximum output is only 1.8 V - sufficient for driving 3.3 V ADC references but not full-rail digital logic interfaces.

What is the maximum capacitive load LM2904ST can drive stably?

LM2904ST maintains phase margin >45° with up to 100 pF capacitive load (per Figure 20). For loads >100 pF, a series isolation resistor (≥100 Ω) between output and capacitance is recommended to prevent peaking or oscillation in unity-gain configurations.

Does LM2904ST require external compensation components?

No. LM2904ST features internal frequency compensation optimized for unity-gain stability across its full 3–30 V supply range and −40°C to +125°C temperature span - eliminating need for external compensation capacitors in standard op-amp configurations.

LM2904ST Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:: 700 kHz

-3db Bandwidth:: -

Current - Input Bias:: 20 nA

Voltage - Input Offset:: 2 mV

Current - Supply:: 700µA

Current - Output / Channel:: 30 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-MiniSO

LM2904ST FAQ

1.How can I place an order for LM2904ST through Aetrix?

Please submit a Request for Quotation (RFQ) for LM2904ST 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 LM2904ST reliable?

The price and inventory of LM2904ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904ST is usually 5 days.

3.What payment methods are accepted for LM2904ST?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904ST transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM2904ST?

LM2904ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM2904ST 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 LM2904ST?

For technical support, including LM2904ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904ST requirements.

6.How does Aetrix verify that LM2904ST is sourced from the original manufacturer or authorized distributors?

All LM2904ST 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 LM2904ST meets industry standards.

7.What is the process for return or replacement of LM2904ST?

All LM2904ST units undergo pre-shipment inspection (PSI). If there is an issue with LM2904ST, 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 LM2904ST part is unused and in its original packaging.

Return procedure for LM2904ST:

1.Submit a request within 90 days.

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

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