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Texas Instruments LM2904DRG4
- Part No.:
- LM2904DRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2904DRG4.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,259
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Product details
Overview
LM2904DRG4 from Texas Instruments is a dual operational amplifier optimized for industrial and automotive applications requiring wide supply range, rail-to-rail input capability (including ground), and robust EMI/RF immunity. It delivers 1.2MHz unity-gain bandwidth, 300µA/ch quiescent current, ±3mV max input offset voltage at 25°C, and operates from 3V to 30V supply. It serves as a precision signal conditioning and feedback amplifier in motor control and power supply monitoring circuits.
For engineers reviewing the LM2904DRG4 datasheet, LM2904DRG4 pinout, LM2904DRG4 application, or LM2904DRG4 equivalent, this page provides verified electrical specifications, SOIC-8 package details, functional pin roles, real-world use cases in HVAC and UPS systems, and two validated alternative parts with documented differences in offset voltage and temperature range.
Technical Context
The LM2904DRG4 belongs to the enhanced LM2904B family, featuring internal RF/EMI filtering and guaranteed operation across –40°C to +125°C ambient. Its input stage supports common-mode voltages down to V– (ground in single-supply configurations), enabling direct sensing of low-side current shunts and battery voltage monitoring without level-shifting circuitry.
It uses a standard bipolar input stage with 10nA typical input bias current and achieves 70V/mV open-loop gain at 15V supply. The device is unity-gain stable and drives up to 100pF capacitive loads while maintaining phase margin ≥56°, supporting reliable closed-loop performance in feedback networks for DC-DC converters and sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 30V - supports 5V, 12V, and 24V industrial rails without external regulation |
| Input Offset Voltage (max, 25°C) | ±3mV - enables accurate DC-coupled amplification in current-sense and voltage-monitoring paths |
| Unity-Gain Bandwidth | 1.2MHz - sufficient for error amplifiers in switching power supplies up to ~200kHz loop bandwidth |
| Quiescent Current per Channel | 300µA (typ) - allows low-power operation in always-on monitoring circuits |
| Common-Mode Input Range | Includes V– (ground) - eliminates need for input biasing resistors in single-supply designs |
| ESD Rating (HBM) | ±500V - meets basic industrial handling requirements per JEDEC JS-001 |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial motor drive environments |
Pinout & Package
LM2904DRG4 is supplied in an 8-pin SOIC (D) package measuring 4.9mm × 6mm, with standard lead pitch (1.27mm) and gull-wing leads suitable for automated assembly and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Output of Amplifier 1 | Delivers buffered, inverted or non-inverted signal depending on configuration; capable of sourcing/sinking ±20mA |
| 2 (IN1–) | Inverting Input of Amplifier 1 | Accepts feedback or reference signals; high-impedance node (4GΩ||1.5pF common-mode) |
| 3 (IN1+) | Non-Inverting Input of Amplifier 1 | Receives sensed signal (e.g., shunt voltage); supports common-mode down to V– |
| 4 (V–) | Negative Supply / Ground | Reference for both amplifiers; must be connected directly to system ground or negative rail |
| 5 (IN2+) | Non-Inverting Input of Amplifier 2 | Independent second channel input; identical electrical characteristics to Pin 3 |
| 6 (IN2–) | Inverting Input of Amplifier 2 | Supports independent feedback network; no crosstalk with Channel 1 (≥120dB isolation) |
| 7 (OUT2) | Output of Amplifier 2 | Provides second independent output; same drive strength and settling behavior as Pin 1 |
| 8 (V+) | Positive Supply | Accepts 3V–30V DC; decoupling capacitor (0.1µF) recommended adjacent to this pin |
Key Features
| Feature | Design Value |
|---|---|
| Ground-sensing input stage | Enables direct connection to low-side current shunts without level shifters or bias networks |
| Integrated RF/EMI filter | Reduces susceptibility to conducted noise in noisy motor drive and power converter environments |
| Wide temperature range (–40°C to +125°C) | Validated for under-hood automotive ECUs and industrial inverters without derating |
| Low quiescent current (300µA/ch) | Permits continuous operation in battery-backed monitoring circuits with minimal drain |
| Unity-gain stable architecture | Eliminates need for external compensation in voltage follower or gain-of-1 configurations |
Applications
| Motor Control Feedback | Power Supply Monitoring |
|---|---|
|
Use Scenario: Closed-loop speed regulation of brushed DC motors using back-EMF or hall sensor signals. IC Role / Device Role / Timing Role: Dual op-amp configures one channel as transducer amplifier for hall sensor output and second as error amplifier comparing setpoint to actual speed. Use Value: Ground-referenced inputs simplify PCB layout by eliminating bias resistors; 1.2MHz bandwidth supports fast transient response in servo loops. |
Use Scenario: Real-time overvoltage and undervoltage detection in 24V industrial PSUs feeding PLC I/O modules. IC Role / Device Role / Timing Role: One amplifier compares sensed rail voltage against precision reference; second implements hysteresis via feedback to prevent chatter near trip thresholds. Use Value: ±3mV offset ensures trip accuracy within ±1% of 24V nominal; –40°C to +125°C rating guarantees reliability across factory floor thermal gradients. |
| HVAC System Sensors | Uninterruptible Power Supplies |
|
Use Scenario: Signal conditioning of thermistor and humidity sensor outputs in indoor/outdoor air conditioner control boards. IC Role / Device Role / Timing Role: Amplifies low-level analog sensor outputs and buffers them for ADC input; second channel used for temperature-compensated offset correction. Use Value: Common-mode range including ground allows direct thermistor bridge connection; 300µA/ch current enables low-power standby mode during off-cycle. |
Use Scenario: Battery voltage monitoring and charge/discharge current sensing in line-interactive UPS units. IC Role / Device Role / Timing Role: First amplifier conditions shunt-based current sense signal; second amplifies battery terminal voltage for state-of-charge estimation. Use Value: Dual-channel integration reduces component count vs discrete solutions; EMI filtering prevents false trips during AC line switching transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2904BDR | Lower max input offset (±2mV), higher ESD rating (±2kV HBM), same SOIC-8 package | Preferred for high-precision current sensing where <2mV offset is required; wider ESD margin suits manufacturing environments with less stringent controls | Select LM2904BDR when tighter offset and enhanced ESD robustness justify cost premium over LM2904DRG4 |
| LM358DR | Wider supply range (3–36V), lower temperature grade (0°C to +70°C), same pinout | Suitable for commercial-grade power adapters and desktop PC motherboards where extended temperature is unnecessary | Choose LM358DR only for cost-sensitive consumer applications operating strictly within 0°C–70°C ambient |
Compared with LM2904DRG4, LM2904BDR offers improved DC accuracy and ESD resilience for demanding industrial deployments, while LM358DR trades temperature range and offset for lower unit cost in benign environments - neither is pin-compatible drop-in replacement without validation of thermal and offset margins.
Availability
LM2904DRG4 is available at Aetrix Electronics and suitable for motor control feedback, power supply monitoring, HVAC sensor conditioning, and uninterruptible power supply design requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2904DRG4 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 components.
The LM2904 product line was engineered for ruggedized industrial and automotive applications requiring wide supply range, ground-sensing capability, and reliable operation across extreme temperatures - targeting motor drives, power conversion, and sensor interface subsystems.
FAQ
What is the maximum supply voltage for LM2904DRG4?
The absolute maximum supply voltage for LM2904DRG4 is 32V, but the recommended operating range is 3V to 30V. Operation above 30V risks exceeding safe junction temperature limits and may degrade long-term reliability, especially at elevated ambient temperatures. Designers should verify thermal dissipation using RθJA = 124.7°C/W for the SOIC-8 package under worst-case load conditions.
Does LM2904DRG4 support rail-to-rail input?
LM2904DRG4 supports rail-to-rail input common-mode range down to V– (including ground), but not up to V+. Its common-mode input range extends from V– to (V+) – 1.5V at room temperature and to (V+) – 2V over full temperature range. This enables true ground-referenced sensing but requires headroom at the positive rail - it is not a full rail-to-rail input op-amp.
Can LM2904DRG4 drive capacitive loads?
Yes, LM2904DRG4 is characterized to drive up to 100pF capacitive loads while maintaining ≥56° phase margin and stable step response. For loads exceeding 100pF, external series resistance (typically 10–100Ω) at the output is recommended to isolate the capacitance and preserve stability in closed-loop configurations such as active filters or buffer stages.
What is the input bias current specification for LM2904DRG4?
The input bias current for LM2904DRG4 is specified as –20nA (typical) and –250nA (maximum) at 25°C, with –500nA maximum over the full –40°C to +125°C operating range. This bipolar-input architecture results in higher bias current than CMOS op-amps but provides superior EMI immunity and robustness in electrically noisy industrial settings.
Is LM2904DRG4 pin-compatible with LM358DR?
Yes, LM2904DRG4 and LM358DR share identical SOIC-8 pinout and pin functions, but they differ in key specifications: LM2904DRG4 is rated for –40°C to +125°C and has 3–30V supply range, whereas LM358DR is rated for 0°C to +70°C and supports 3–36V. Direct substitution requires verification of temperature and supply-voltage requirements in the target application.
LM2904DRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 0.3V/µs
- Gain Bandwidth Product:
- 700 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 500µA (x2 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 26 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM2904DRG4 FAQ
1.How can I place an order for LM2904DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904DRG4 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 LM2904DRG4 reliable?
The price and inventory of LM2904DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904DRG4 is usually 5 days.
3.What payment methods are accepted for LM2904DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904DRG4?
LM2904DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904DRG4 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 LM2904DRG4?
For technical support, including LM2904DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904DRG4 requirements.
6.How does Aetrix verify that LM2904DRG4 is sourced from the original manufacturer or authorized distributors?
All LM2904DRG4 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 LM2904DRG4 meets industry standards.
7.What is the process for return or replacement of LM2904DRG4?
All LM2904DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM2904DRG4, 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 LM2904DRG4 part is unused and in its original packaging.
Return procedure for LM2904DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2904DRG4 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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