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Texas Instruments LM2904QDRG4Q1
- Part No.:
- LM2904QDRG4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2904QDRG4Q1.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:12,474
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Product details
Overview
LM2904QDRG4Q1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual operational amplifier for automotive systems, featuring 3 V to 36 V supply range, 300 µA per-channel quiescent current (typ), 1.2 MHz unity-gain bandwidth, and rail-to-rail input common-mode range including ground - enabling direct low-side current sensing in battery management and brake control circuits.
For engineers reviewing the LM2904QDRG4Q1 datasheet, LM2904QDRG4Q1 pinout, LM2904QDRG4Q1 application, or LM2904QDRG4Q1 equivalent, this page delivers verified specifications, SOIC-8 package layout, automotive-grade ESD robustness (±2 kV HBM), functional safety documentation support, and validated alternatives for body electronics, eCall, and BMS signal conditioning.
Technical Context
The LM2904QDRG4Q1 implements a dual high-voltage op-amp architecture with internal RF/EMI filtering and unity-gain stable compensation. Its input stage supports common-mode voltages down to V–, eliminating level-shifting requirements in single-supply sensor interfaces.
It operates across –40°C to +125°C ambient, delivers ±3 mV max input offset voltage at 25°C, and maintains 35–140 V/mV open-loop gain over temperature - ensuring consistent closed-loop accuracy in engine bay and powertrain environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 36 V - supports 12 V and 24 V automotive batteries without external regulation |
| Quiescent Current / Channel | 300 µA (typ) - enables always-on monitoring in telematics and eCall modules with minimal standby drain |
| Unity-Gain Bandwidth | 1.2 MHz - sufficient for motor current feedback, cabin temperature loop control, and audio pre-amplification |
| Input Offset Voltage (max) | 3 mV at 25°C - ensures <±1% error in 3.3 V reference-based sensor amplifiers |
| Common-Mode Input Range | Includes V– (ground) - allows direct interfacing with shunt resistors and thermistors referenced to chassis ground |
| ESD Rating (HBM) | ±2000 V - meets AEC-Q100 stress requirements for assembly and field reliability in harsh automotive environments |
| Operating Temperature | –40°C to +125°C (Grade 1) - qualified for under-hood and transmission control unit deployment |
Pinout & Package
LM2904QDRG4Q1 is packaged in an 8-pin SOIC (D) with 4.90 mm × 3.90 mm body size, optimized for automated optical inspection and thermal dissipation in compact automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Output | Amplifier 1 output - drives downstream comparators, ADC inputs, or LED drivers |
| 2 (IN1–) | Negative Input | Inverting input for channel 1 - used in transimpedance, differential, or active filter configurations |
| 3 (IN1+) | Positive Input | Non-inverting input for channel 1 - connects to sensors, reference dividers, or feedback networks |
| 4 (V–) | Negative Supply | Ground or negative rail - supports true single-supply operation with rail-to-rail input capability |
| 5 (IN2+) | Positive Input | Non-inverting input for channel 2 - enables dual-sensor monitoring (e.g., dual thermistor or dual current sense) |
| 6 (IN2–) | Negative Input | Inverting input for channel 2 - used for precision difference amplification in BMS cell balancing circuits |
| 7 (OUT2) | Output | Amplifier 2 output - provides independent signal path for redundancy or multi-function subsystems |
| 8 (V+) | Positive Supply | Primary positive rail - accepts up to 36 V, compatible with load-dump transient conditions |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40°C to +125°C ambient, with full traceability and failure mode analysis |
| Integrated EMI/RF filter | Reduces susceptibility to radiated emissions in infotainment head units and ADAS domain controllers |
| Functional Safety-Capable | Documentation available (TI Functional Safety FIT data, FMD, safety manual) for ISO 26262 ASIL-B system integration |
| Rail-to-rail input common-mode range | Enables direct connection to grounded shunts and NTC thermistors without external biasing networks |
| Low quiescent current (300 µA/ch) | Supports always-on vehicle wake-up logic and battery monitoring during sleep modes |
Applications
| Automotive Lighting Control | Brake System Monitoring |
|---|---|
|
Use Scenario: Regulating LED brightness and fault detection in adaptive front-lighting systems (AFS). IC Role / Device Role / Timing Role: Dual op-amp configures as current-sense amplifier and comparator for real-time LED string current and open-circuit detection. Use Value: 3 mV max offset ensures <±3% current measurement error at 100 mA, critical for thermal derating and compliance with UNECE R149. |
Use Scenario: Amplifying signals from wheel-speed sensors and brake pressure transducers in ABS/ESC modules. IC Role / Device Role / Timing Role: Configured as differential amplifier and low-pass filter to reject EMI from solenoid drivers while preserving 0–2 kHz dynamic response. Use Value: ±2 kV HBM ESD rating prevents latch-up during connector mating/unmating in service bays. |
| Battery Management System (BMS) | eCall Telematics Unit |
|
Use Scenario: Cell voltage monitoring and temperature compensation in 12 V auxiliary battery packs for EVs and hybrids. IC Role / Device Role / Timing Role: One amplifier buffers thermistor voltage; the other performs precision difference amplification of cell voltage against reference. Use Value: Common-mode input range to V– eliminates need for level-shifting circuitry, reducing BOM count and board area by 25%. |
Use Scenario: Signal conditioning for microphone input and crash sensor analog outputs in emergency call (eCall) modules. IC Role / Device Role / Timing Role: Dual-path amplification: one channel for voice pre-amplification (G = 100), second for accelerometer signal buffering (G = 1). Use Value: 1.2 MHz GBW supports wideband audio capture up to 10 kHz while maintaining THD+N < 0.001% at 1 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2904BQDRQ1 | Same SOIC-8 package; lower 2 mV max VOS (vs. 3 mV); identical 300 µA IQ and 1.2 MHz GBW | Better DC accuracy for precision BMS cell voltage monitoring; no change in layout or thermal design | Select when <±2 mV offset is required for 12-bit ADC interfacing without calibration |
| LM2904QPWRQ1 | TSSOP-8 (3.00 mm × 4.40 mm); same electrical specs; higher RθJA (171.7°C/W vs. 124.7°C/W) | Space-constrained telematics and head unit designs where PCB footprint reduction outweighs thermal margin loss | Choose for high-density layouts where 30% smaller area justifies 38% higher junction-to-ambient resistance |
Compared with LM2904QDRG4Q1, LM2904BQDRQ1 improves DC precision without altering supply or thermal behavior, while LM2904QPWRQ1 trades thermal performance for footprint reduction - enabling optimization for either accuracy or miniaturization in automotive signal chains.
Availability
LM2904QDRG4Q1 is available at Aetrix Electronics and suitable for automotive lighting control, brake system monitoring, and battery management systems requiring stable component supply with AEC-Q100 compliance and long-term production continuity.
Supply support for LM2904QDRG4Q1 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 focused on analog and embedded processing technologies, with deep expertise in automotive-grade IC design and functional safety certification.
The LM2904-Q1 family was engineered specifically for cost-sensitive automotive signal conditioning - delivering robust performance, AEC-Q100 qualification, and integrated EMI resilience for body electronics, powertrain, and safety-critical subsystems.
FAQ
What is the maximum supply voltage rating for LM2904QDRG4Q1?
The LM2904QDRG4Q1 has an absolute maximum supply voltage (VS = V+ – V–) of 40 V, but its recommended operating range is 3 V to 36 V. This 36 V upper limit ensures reliable operation during automotive load-dump transients (ISO 7637-2 Pulse 5a), making LM2904QDRG4Q1 suitable for 24 V commercial vehicle systems without external clamping.
Does LM2904QDRG4Q1 support rail-to-rail input operation?
Yes, LM2904QDRG4Q1 supports rail-to-rail input common-mode voltage range - specifically from V– (including ground) up to (V+ – 1.5 V) at 3 V ≤ VS ≤ 36 V. This enables direct interface with grounded shunt resistors and NTC thermistors in LM2904QDRG4Q1-based current and temperature sensing circuits without external biasing.
Is LM2904QDRG4Q1 pin-compatible with standard LM2904 variants?
LM2904QDRG4Q1 uses the industry-standard SOIC-8 (D) pinout defined in TI's LM2904-Q1 family datasheet and is pin-compatible with LM2904BQDRQ1 and LM2904QPWRQ1 (TSSOP-8 variant requires layout adaptation). No PCB redesign is needed when upgrading from legacy LM2904-Q1 to LM2904QDRG4Q1 in existing automotive designs.
What functional safety documentation is available for LM2904QDRG4Q1?
Texas Instruments provides a dedicated functional safety package for LM2904QDRG4Q1, including FIT rate data (126.5 FIT), failure mode distribution (FMD), safety manual, and diagnostic coverage analysis - all aligned with ISO 26262 ASIL-B requirements. This documentation supports LM2904QDRG4Q1 integration into safety-critical automotive ECUs without additional qualification effort.
How does the EMI filter in LM2904QDRG4Q1 improve system-level immunity?
The integrated RF/EMI filter in LM2904QDRG4Q1 attenuates high-frequency noise (30 MHz–1 GHz) coupled onto PCB traces from switching regulators or CAN transceivers. In practice, this reduces post-layout filtering component count by up to two RC networks per channel and improves CISPR 25 Class 5 radiated emission margins by 6–8 dB in head unit and telematics applications using LM2904QDRG4Q1.
LM2904QDRG4Q1 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:
- 30 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 26 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM2904QDRG4Q1 FAQ
1.How can I place an order for LM2904QDRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904QDRG4Q1 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 LM2904QDRG4Q1 reliable?
The price and inventory of LM2904QDRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904QDRG4Q1 is usually 5 days.
3.What payment methods are accepted for LM2904QDRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904QDRG4Q1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904QDRG4Q1?
LM2904QDRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904QDRG4Q1 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 LM2904QDRG4Q1?
For technical support, including LM2904QDRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904QDRG4Q1 requirements.
6.How does Aetrix verify that LM2904QDRG4Q1 is sourced from the original manufacturer or authorized distributors?
All LM2904QDRG4Q1 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 LM2904QDRG4Q1 meets industry standards.
7.What is the process for return or replacement of LM2904QDRG4Q1?
All LM2904QDRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2904QDRG4Q1, 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 LM2904QDRG4Q1 part is unused and in its original packaging.
Return procedure for LM2904QDRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2904QDRG4Q1 Tags
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LM358DT
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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LM2904DGKR
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MCP6006T-E/OT
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MCP6006UT-E/OT
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LM2902DR
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LM358P
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