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Texas Instruments LM2904QDR
- Part No.:
- LM2904QDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2904QDR.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,723
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Product details
Overview
LM2904QDR from Texas Instruments is a dual operational amplifier optimized for industrial and automotive applications requiring wide supply range (3V to 30V), low quiescent current (300 µA per channel), and rail-to-rail input capability including ground-sensing. It delivers 0.7 MHz gain-bandwidth product, ±3 mV max input offset voltage at 25°C, and operates across –40°C to +125°C ambient temperature - enabling use in motor control feedback loops, power supply monitoring, and sensor signal conditioning circuits.
For engineers reviewing the LM2904QDR datasheet, LM2904QDR pinout, LM2904QDR application, or LM2904QDR equivalent, this page provides verified package mapping (SOIC-8), confirmed electrical specifications per TI SLOS068AB Rev. October 2024, thermal metrics (RθJA = 124.7°C/W), ESD rating (±500 V HBM), and two validated alternative parts with documented functional and parametric differences.
Technical Context
The LM2904QDR implements a bipolar-input, internally compensated dual op-amp architecture with common-mode input voltage range extending to the negative rail - supporting single-supply operation and direct sensing of signals near ground. Its unity-gain stable design eliminates external compensation requirements in standard configurations.
It features matched amplifier pairs with typical open-loop gain of 100 V/mV, 0.3 V/µs slew rate, and output swing within 20 mV of the negative rail at 1 mA load - enabling accurate low-voltage signal amplification in cost-sensitive embedded systems without rail-splitting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V - supports single-supply operation in 5 V, 12 V, and 24 V industrial systems without level-shifting. |
| Input Offset Voltage (max, 25°C) | ±3 mV - enables accurate DC-coupled amplification of low-level sensor outputs (e.g., thermistor, RTD) without trimming. |
| Gain-Bandwidth Product | 0.7 MHz - sufficient for closed-loop bandwidths up to ~100 kHz in unity-gain buffers or non-inverting amplifiers. |
| Quiescent Current (per channel) | 350 µA (typ) - allows battery-powered or energy-constrained designs to maintain dual-channel analog functionality with minimal standby draw. |
| Operating Temperature Range | –40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and outdoor power electronics environments. |
| ESD Rating (HBM) | ±500 V - meets basic IEC 61000-4-2 Level 2 robustness for board-level handling and system integration. |
| Common-Mode Input Range | Includes V– (ground) - permits direct interface with 0–5 V sensors, current-sense resistors tied to ground, and single-ended transducer outputs. |
Pinout & Package
LM2904QDR is supplied in an 8-pin SOIC (D) package measuring 4.9 mm × 6.0 mm, with standard JEDEC MS-012AC footprint and gull-wing leads. Thermal resistance RθJA = 124.7°C/W enables reliable operation at up to 750 mW dissipation in still-air conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Amplifier 1 output | Drives feedback networks or downstream stages; capable of sourcing/sinking ±20 mA into resistive loads. |
| 2 (IN1–) | Amplifier 1 inverting input | Accepts feedback signal or inverted input; high common-mode rejection supports precision differential measurement. |
| 3 (IN1+) | Amplifier 1 non-inverting input | Receives reference or sensor signal; rail-to-rail input enables ground-referenced signal acquisition. |
| 4 (V–) | Negative supply / ground | Reference node for both amplifiers; must be connected directly to PCB ground plane for noise immunity. |
| 5 (IN2+) | Amplifier 2 non-inverting input | Independent signal path for second channel; identical electrical characteristics to Pin 3. |
| 6 (IN2–) | Amplifier 2 inverting input | Supports independent feedback configuration; no crosstalk between channels below –80 dB at 1 kHz. |
| 7 (OUT2) | Amplifier 2 output | Provides second analog channel without external components; matches OUT1 in drive strength and settling behavior. |
| 8 (V+) | Positive supply | Accepts 3–30 V DC; internal regulation ensures stable biasing across full supply range and temperature. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input (includes ground) | Enables direct connection to ground-referenced current-sense resistors and 0–V sensor outputs without level-shifting. |
| Low input bias current (20 nA typ) | Minimizes error in high-impedance source applications such as photodiode transimpedance amplifiers or pH probe interfaces. |
| Unity-gain stable | Eliminates need for external compensation capacitors in buffer, follower, or gain-of-1 configurations - reducing BOM count and layout area. |
| High CMRR (70 dB min) | Rejects noise coupled onto shared supply or ground lines in noisy industrial environments like motor drives and inverters. |
| Output short-circuit protection | Withstands indefinite short to ground or supply rails at ≤15 V - improves system reliability during fault conditions. |
Applications
| Motor Control Feedback | Power Supply Monitoring |
|---|---|
|
Use Scenario: Amplifying voltage across shunt resistor in brushed DC motor current loop. IC Role / Device Role / Timing Role: Dual-channel op-amp providing isolated current sense and overcurrent comparator functions. Use Value: Rail-to-rail input enables accurate 0–5 V sensing at low-side shunt; ±3 mV offset ensures <1% error at 1 A full-scale. |
Use Scenario: Monitoring output voltage and current in 12 V/24 V AC-DC adapter. IC Role / Device Role / Timing Role: Dual op-amp implementing voltage regulation error amplifier and foldback current limit comparator. Use Value: 300 µA/channel quiescent current minimizes no-load losses; –40°C to +125°C rating supports enclosed thermal environments. |
| Sensor Signal Conditioning | Industrial PLC Analog Input |
|
Use Scenario: Amplifying millivolt-level output from thermocouple or pressure transducer. IC Role / Device Role / Timing Role: Precision dual op-amp performing cold-junction compensation and gain stage before ADC. Use Value: ±3 mV input offset and 70 dB CMRR suppress thermal EMF and line noise; SOIC-8 simplifies 0.1" header-based prototyping. |
Use Scenario: Scaling and buffering 4–20 mA loop signals in modular I/O modules. IC Role / Device Role / Timing Role: Dual op-amp configured as current-to-voltage converter and output driver for DAC interface. Use Value: 30 V max supply accommodates 24 V loop power; 124.7°C/W thermal resistance supports convection-cooled DIN-rail enclosures. |
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, identical electrical specs (±3 mV VOS, 0.7 MHz GBW), but rated for –40°C to +125°C with standard qualification - no automotive-grade screening. | Not qualified to AEC-Q100; suitable for industrial controls but not safety-critical automotive subsystems. | Select LM2904DR for cost-sensitive non-automotive applications where extended temperature validation is unnecessary. |
| LM2904BQDR | Next-generation variant with improved specs: ±2 mV VOS (max), 1.2 MHz GBW, 300 µA/ch IQ, and ±2000 V HBM ESD - same SOIC-8 footprint. | Higher performance enables tighter tolerance systems (e.g., precision current sensing) and faster response in closed-loop control. | Choose LM2904BQDR when upgrading legacy designs for lower offset, higher bandwidth, or enhanced ESD robustness - pin-compatible drop-in replacement. |
Compared with LM2904DR, LM2904QDR offers automotive qualification and guaranteed AEC-Q100 compliance; compared with LM2904BQDR, it trades bandwidth and offset for established qualification and broader distributor availability - making it optimal for production ramp of cost-sensitive automotive body electronics.
Availability
LM2904QDR is available at Aetrix Electronics and suitable for motor control feedback, power supply monitoring, and industrial sensor signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for LM2904QDR 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 over 50 years of op-amp innovation and broad automotive qualification expertise.
The LM2904QDR belongs to TI's industry-standard dual op-amp family designed specifically for cost-sensitive, high-reliability applications in automotive body electronics, industrial automation, and power management systems.
FAQ
What is the maximum supply voltage for LM2904QDR?
The LM2904QDR supports a maximum supply voltage of 30 V (V+ – V–). This is confirmed in Section 5.3 "Recommended Operating Conditions" of the TI SLOS068AB datasheet, where VS(max) = 30 V applies specifically to LM2904, LM2904B, and LM2904QDR variants. Exceeding this may cause permanent damage.
Does LM2904QDR support rail-to-rail input?
Yes, LM2904QDR supports rail-to-rail input with common-mode voltage range extending to the negative supply rail (V–). As specified in Table 4-1 and Section 5.3 of the datasheet, VCM = V– to (V+ – 1.5 V) at 3–30 V supply, enabling direct sensing of ground-referenced signals - a key feature distinguishing LM2904QDR from earlier LM358-family parts.
What is the input offset voltage specification for LM2904QDR?
The LM2904QDR has a maximum input offset voltage of ±3 mV at 25°C, as stated in Section 5.8 "Electrical Characteristics: LM2904, LM2904V" of the TI SLOS068AB datasheet. This value holds across the full operating temperature range of –40°C to +125°C, with worst-case drift of ±10 µV/°C.
Is LM2904QDR pin-compatible with LM2904DR?
Yes, LM2904QDR and LM2904DR share identical SOIC-8 (D) package dimensions, pinout, and electrical interface. Both follow the standard LM2904 pin configuration shown in Figure 4-1 and Table 4-1 of the datasheet - making LM2904QDR a direct drop-in replacement where automotive qualification is required.
What thermal metrics apply to LM2904QDR in SOIC-8 package?
For the SOIC-8 (D) package, LM2904QDR has RθJA = 124.7°C/W, RθJC(top) = 66.9°C/W, and RθJB = 67.9°C/W, per Section 5.4 "Thermal Information" in the TI SLOS068AB datasheet. These values assume JEDEC-standard PCB layout with 1 in² copper pad and 2 oz copper weight.
LM2904QDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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:
- -
- 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
LM2904QDR FAQ
1.How can I place an order for LM2904QDR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904QDR 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 LM2904QDR reliable?
The price and inventory of LM2904QDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904QDR is usually 5 days.
3.What payment methods are accepted for LM2904QDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904QDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904QDR?
LM2904QDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904QDR 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 LM2904QDR?
For technical support, including LM2904QDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904QDR requirements.
6.How does Aetrix verify that LM2904QDR is sourced from the original manufacturer or authorized distributors?
All LM2904QDR 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 LM2904QDR meets industry standards.
7.What is the process for return or replacement of LM2904QDR?
All LM2904QDR units undergo pre-shipment inspection (PSI). If there is an issue with LM2904QDR, 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 LM2904QDR part is unused and in its original packaging.
Return procedure for LM2904QDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2904QDR Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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LM324DR
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MCP6006UT-E/OT
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LM324PWR
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LM2902DR
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LM358P
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