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Texas Instruments LM2904QDRG4
- Part No.:
- LM2904QDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2904QDRG4.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,099
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Product details
Overview
LM2904QDRG4 from Texas Instruments is a dual operational amplifier optimized for industrial and automotive applications, featuring rail-to-rail input (including ground), 1.2MHz unity-gain bandwidth, 300µA per amplifier quiescent current, ±3mV max input offset voltage at 25°C, and operation across 3V to 36V supply range. It serves as a general-purpose signal conditioning and feedback amplifier in power supply control loops and motor driver circuits.
For engineers reviewing the LM2904QDRG4 datasheet, LM2904QDRG4 pinout, LM2904QDRG4 application, or LM2904QDRG4 equivalent, this page delivers verified electrical specifications, SOIC-8 package details, temperature-rated performance (–40°C to +125°C), EMI-filtered design, and direct alternative part comparisons - all validated against TI's SLOS068AB production data sheet (October 2024).
Technical Context
The LM2904QDRG4 implements a bipolar-input op amp architecture with internal RF/EMI filtering and common-mode input range extending to V– (ground in single-supply use). Its 1.2MHz gain-bandwidth product supports stable closed-loop operation at unity gain, while the 0.5V/µs slew rate and 56° phase margin ensure robust transient response in feedback networks.
Designed for extended-temperature environments, it maintains ≤±4mV input offset voltage over –40°C to +125°C and draws only 300–460µA per channel across that full range. Input bias current remains below –50nA, enabling high-impedance sensor interfacing without significant error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - supports wide-input industrial power rails and battery-backed systems without external regulation |
| Unity-Gain Bandwidth | 1.2MHz - enables stable amplification of signals up to ~100kHz with minimal phase lag in closed-loop configurations |
| Input Offset Voltage (max) | ±3mV at 25°C - ensures ≤3mV DC error in precision DC-coupled gain stages (e.g., current-sense amplifiers) |
| Quiescent Current / Channel | 300µA typical (≤460µA over –40°C to +125°C) - allows low-power operation in always-on monitoring circuits |
| Common-Mode Input Range | Includes V– (ground) - permits direct sensing of signals referenced to system ground, eliminating level-shifting components |
| ESD Rating (HBM) | ±2000V - provides robust handling during PCB assembly and field deployment in electrically noisy environments |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and outdoor power electronics |
Pinout & Package
LM2904QDRG4 is supplied in an 8-pin SOIC (D) package measuring 4.9mm × 6mm, with standard industry pinout compatible with legacy LM2904 variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Output | Amplifier 1 output - drives feedback networks or downstream analog stages; capable of sourcing/sinking ±20mA |
| 2 (IN1–) | Inverting Input | Differential input node for Amp1 - accepts signals referenced to ground or mid-rail; supports rail-to-rail common-mode range |
| 3 (IN1+) | Non-Inverting Input | Positive input for Amp1 - used in follower, summing, or differential configurations; high-impedance (≥4GΩ) |
| 4 (V–) | Negative Supply | Lowest potential supply rail - tied to ground in single-supply operation; defines lower bound of input/output swing |
| 5 (IN2+) | Non-Inverting Input | Positive input for Amp2 - independent channel enables dual-path signal processing (e.g., current + voltage sensing) |
| 6 (IN2–) | Inverting Input | Differential input node for Amp2 - functionally identical to Pin 2; supports separate feedback paths |
| 7 (OUT2) | Output | Amplifier 2 output - electrically isolated from OUT1; shares same drive capability and thermal limits |
| 8 (V+) | Positive Supply | Highest potential supply rail - accepts up to 36V; powers both amplifiers and sets output swing ceiling |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input including ground | Enables direct interface with grounded sensors (e.g., shunt resistors, thermistors) without external biasing circuitry |
| Integrated RF and EMI filter | Reduces susceptibility to high-frequency noise in motor drive, power supply, and industrial communication environments |
| 1.2MHz unity-gain stable bandwidth | Supports fast-settling closed-loop designs (e.g., PID controllers) without external compensation components |
| –40°C to +125°C operating range | Qualified for under-hood automotive ECUs, industrial inverters, and outdoor HVAC control modules |
| SOIC-8 package compatibility | Drop-in replacement for legacy LM2904 in existing PCB layouts; no footprint redesign required |
Applications
| Motor Control Feedback | Industrial Power Supply Monitoring |
|---|---|
Use Scenario: Sensing phase current in brushless DC motor drivers using low-side shunt resistors. IC Role / Device Role / Timing Role: Dual op amp configured as two independent current-sense amplifiers, one per phase. Use Value: Rail-to-rail input allows accurate measurement near ground; 300µA quiescent current minimizes standby loss in always-on motor controllers. | Use Scenario: Monitoring output voltage and overcurrent protection in 24V industrial SMPS units. IC Role / Device Role / Timing Role: One amplifier compares regulated output to reference; second implements foldback current limiting. Use Value: 36V supply rating matches primary-side rail; ±3mV offset ensures tight regulation tolerance without calibration. |
| Automotive Body Control Module | Outdoor Air Conditioner Control |
Use Scenario: Signal conditioning for cabin temperature and humidity sensors in BCMs. IC Role / Device Role / Timing Role: Amplifies low-level analog outputs from NTC thermistors and capacitive humidity sensors. Use Value: –40°C to +125°C rating covers full automotive ambient range; EMI filtering suppresses ignition noise coupling. | Use Scenario: Closed-loop control of compressor speed and refrigerant pressure in outdoor condensing units. IC Role / Device Role / Timing Role: Dual-channel error amplifier in PID loop for inverter-driven compressors. Use Value: 1.2MHz GBW enables fast response to load transients; SOIC-8 package withstands outdoor thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2904DR | Same SOIC-8 package and pinout; identical electrical specs but rated only to +105°C (not +125°C) | Not qualified for under-hood automotive or high-temp industrial enclosures | Select LM2904QDRG4 when full AEC-Q100 Grade 1 (–40°C to +125°C) compliance is required |
| LM2904BQDRG4 | Enhanced version with ±2mV max offset (vs. ±3mV), same temp range and package | Better DC accuracy for precision current/voltage sensing; otherwise drop-in compatible | Choose LM2904BQDRG4 where <2mV offset is mandatory; LM2904QDRG4 remains optimal for cost-sensitive high-temp designs |
Compared with LM2904DR and LM2904BQDRG4, the LM2904QDRG4 offers the best balance of extended temperature qualification, proven reliability in automotive-grade manufacturing, and cost efficiency - making it the preferred choice for industrial motor drives and outdoor power electronics where thermal margin and long-term stability are critical.
Availability
LM2904QDRG4 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and outdoor HVAC systems requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM2904QDRG4 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The LM2904QDRG4 belongs to TI's industry-standard dual op amp product line, engineered specifically for ruggedized applications demanding extended temperature operation, EMI resilience, and drop-in compatibility with legacy designs.
FAQ
What is the maximum supply voltage for LM2904QDRG4?
The LM2904QDRG4 supports a maximum supply voltage of 36V across its V+ and V– pins. This rating applies to both single-supply (e.g., V– = 0V, V+ = 36V) and split-supply (e.g., V+ = +18V, V– = –18V) configurations. Absolute maximum ratings are defined in Section 5.1 of the TI SLOS068AB datasheet, and operation beyond 36V risks permanent device damage. The LM2904QDRG4 maintains full functionality across its entire 3V–36V range.
Does LM2904QDRG4 support rail-to-rail input and output?
The LM2904QDRG4 supports rail-to-rail input - its common-mode voltage range extends to V– (including ground) and up to V+ – 1.5V - but does not provide rail-to-rail output swing. Output voltage typically swings to within 1.5V of V+ and 20mV of V– under light load (50µA), degrading to ~1.6V from V+ and ~1V from V– at 5mA sink/source. This behavior is documented in Section 5.6 of the LM2904QDRG4 datasheet and must be accounted for in precision output stage design.
Is LM2904QDRG4 pin-compatible with standard LM2904 variants?
Yes, the LM2904QDRG4 uses the standard 8-pin SOIC (D) package with identical pinout to LM2904, LM2904DR, and LM2904BQDRG4. Pin functions - including IN1±, IN1+, V–, IN2+, IN2–, OUT2, and V+ - match the industry-standard configuration shown in Figure 4-1 of the TI SLOS068AB datasheet. No PCB layout changes are needed when upgrading from legacy LM2904 to LM2904QDRG4.
What is the input offset voltage specification for LM2904QDRG4 at full temperature range?
The LM2904QDRG4 has a maximum input offset voltage of ±4mV over its full operating ambient temperature range of –40°C to +125°C. At 25°C, the limit is tighter: ±3mV maximum. These values are specified in Section 5.6 ("Electrical Characteristics: LM2904B and LM2904BA") of the TI SLOS068AB datasheet and apply to the Q-grade (automotive-qualified) variant. Offset drift is ±3.5µV/°C typical across the same range.
How does LM2904QDRG4 differ from LM2904BQDRG4?
The LM2904QDRG4 and LM2904BQDRG4 share identical package, pinout, temperature rating (–40°C to +125°C), and most electrical parameters - but differ in input offset voltage: LM2904QDRG4 is rated at ±3mV max (25°C), while LM2904BQDRG4 improves to ±2mV max. Both include integrated EMI filtering and 1.2MHz GBW. The "B" suffix denotes the newer generation with tighter DC specs; LM2904QDRG4 remains the cost-optimized option for applications where ±3mV offset is acceptable.
LM2904QDRG4 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
LM2904QDRG4 FAQ
1.How can I place an order for LM2904QDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904QDRG4 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 LM2904QDRG4 reliable?
The price and inventory of LM2904QDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904QDRG4 is usually 5 days.
3.What payment methods are accepted for LM2904QDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904QDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904QDRG4?
LM2904QDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904QDRG4 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 LM2904QDRG4?
For technical support, including LM2904QDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904QDRG4 requirements.
6.How does Aetrix verify that LM2904QDRG4 is sourced from the original manufacturer or authorized distributors?
All LM2904QDRG4 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 LM2904QDRG4 meets industry standards.
7.What is the process for return or replacement of LM2904QDRG4?
All LM2904QDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM2904QDRG4, 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 LM2904QDRG4 part is unused and in its original packaging.
Return procedure for LM2904QDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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