My Inquiry
My Account
Texas Instruments LM2904AVQDR
- Part No.:
- LM2904AVQDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2904AVQDR.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:72,741
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2904AVQDR from Texas Instruments is a dual operational amplifier optimized for industrial and automotive applications, featuring rail-to-rail input (including ground), 3V–30V supply range, 300µA/ch quiescent current, 0.7MHz gain bandwidth, and ±2mV max input offset voltage at 25°C. It serves as a precision signal conditioning and feedback amplification IC in motor control, power supply monitoring, and sensor interface circuits.
For engineers reviewing the LM2904AVQDR datasheet, LM2904AVQDR pinout, LM2904AVQDR application, or LM2904AVQDR equivalent, this page delivers verified electrical specifications, SOIC-8 package details, real-world use cases in high-temperature environments, and validated alternative parts with documented parameter differences.
Technical Context
The LM2904AVQDR implements a bipolar-input op-amp architecture with common-mode input voltage range extending to V– (ground in single-supply operation), enabling direct sensing of low-side current shunts and thermistor bridges. Its internal EMI/RF filtering supports robust operation in electrically noisy motor drive and power conversion systems.
It operates across –40°C to +125°C ambient temperature, with guaranteed performance at maximum supply voltage of 30V and minimum of 3V. The device exhibits unity-gain stability, 35 V/mV open-loop gain at full temperature range, and 0.3 V/µs slew rate - characteristics aligned with cost-sensitive, high-reliability analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 30V - supports wide-input industrial power rails and battery-backed systems without external regulation |
| Input Offset Voltage (max, 25°C) | ±2 mV - enables accurate DC-coupled amplification in precision sensor front-ends (e.g., load cell, RTD) |
| Quiescent Current per Channel | 350 µA (typ) - allows dual-amplifier operation in always-on subsystems with <1 mW standby power at 3V |
| Gain Bandwidth Product | 0.7 MHz - sufficient for closed-loop control loops up to ~70 kHz (e.g., PWM feedback, voltage mode regulation) |
| Common-Mode Input Range | V– to (V+) – 2V - permits direct ground-referenced input acquisition without level-shifting circuitry |
| Operating Temperature Range | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and HVAC controller environments |
| ESD Rating (HBM) | 500 V - meets basic IEC 61000-4-2 system-level ESD immunity requirements when properly decoupled |
Pinout & Package
LM2904AVQDR is packaged in an 8-pin SOIC (D package), measuring 4.9 mm × 6.0 mm, with standard lead pitch (1.27 mm) and surface-mount compatibility for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Amplifier 1 output | Drives feedback network or next-stage input; capable of sourcing/sinking ±20 mA into resistive loads |
| 2 (IN1–) | Amplifier 1 inverting input | Accepts feedback signal or inverted input path; high-impedance node (4 GΩ||1.5 pF) |
| 3 (IN1+) | Amplifier 1 non-inverting input | Receives reference or sensor signal; common-mode range includes ground for single-supply use |
| 4 (V–) | Negative supply / ground | Reference for both amplifiers; must be low-impedance to minimize noise coupling and offset drift |
| 5 (IN2+) | Amplifier 2 non-inverting input | Independent signal path for dual-channel functions (e.g., current sense + voltage monitor) |
| 6 (IN2–) | Amplifier 2 inverting input | Supports differential configuration or independent feedback loop |
| 7 (OUT2) | Amplifier 2 output | Electrically isolated from OUT1; enables simultaneous dual-loop control without crosstalk |
| 8 (V+) | Positive supply | Accepts up to 30V; internal regulation not required - simplifies power domain partitioning |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input (V– inclusive) | Eliminates need for external biasing networks in single-supply sensor interfaces, reducing BOM count and layout area |
| Integrated RF/EMI filter | Suppresses high-frequency noise from switching power supplies and motor drivers without external ferrite beads or RC filters |
| –40°C to +125°C operation | Enables deployment in engine control units, industrial inverters, and outdoor-rated power electronics without derating |
| Low input bias current (15 nA typ) | Minimizes voltage error in high-impedance source applications such as thermistor or photodiode amplifiers |
| Unity-gain stable | Permits direct use in voltage follower, active filter, and transimpedance configurations without external compensation |
Applications
| Motor Control Feedback | Industrial Power Supply Monitoring |
|---|---|
Use Scenario: Closed-loop speed regulation of brushed DC motors using back-EMF sensing and current shunt amplification. IC Role / Device Role / Timing Role: Dual-channel signal conditioning: one amplifier buffers shunt voltage; the other compares back-EMF to reference for commutation timing. Use Value: Enables precise torque control and stall detection at ambient temperatures up to 125°C without thermal drift-induced offset errors. | Use Scenario: Real-time overvoltage and undervoltage protection in 24V industrial SMPS with remote sense capability. IC Role / Device Role / Timing Role: Amplifies voltage divider output and drives comparator input; second channel conditions current-sense signal for foldback limiting. Use Value: Achieves ±1% total monitoring accuracy across –40°C to +85°C due to low offset drift (±3.5 µV/°C) and CMRR >25 dB. |
| Automotive HVAC Blower Control | Smart Appliance Motor Drive |
Use Scenario: Fan speed control via PWM-driven MOSFET with analog tachometer feedback and thermal foldback. IC Role / Device Role / Timing Role: One amplifier converts Hall-effect tach signal to clean square wave; the other conditions NTC thermistor voltage for temperature-compensated duty cycle adjustment. Use Value: Maintains consistent airflow calibration over vehicle lifetime by rejecting EMI from ignition systems and alternators via integrated filtering. | Use Scenario: Variable-speed induction motor control in washing machines using V/f profile generation and current limiting. IC Role / Device Role / Timing Role: Dual op-amps implement analog V/f ramp generator and phase-current monitor with fast overload recovery (<10 µs). Use Value: Reduces MCU ADC loading and firmware complexity while delivering <0.001% THD+N for quiet motor acoustics. |
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; ±3 mV max offset (vs. ±2 mV); 350 µA/ch IQ; rated for –40°C to +125°C | Lower precision offset specification; suitable where <2 mV is not required for cost-sensitive designs | Select LM2904DR when offset tolerance >±2 mV is acceptable and qualification to AEC-Q100 is not mandatory |
| LM2904BQDR | SOIC-8; ±3 mV max offset; 300 µA/ch IQ; 1.2 MHz GBW; ESD rating 2 kV HBM (vs. 500 V) | Higher bandwidth and lower quiescent current, but reduced ESD robustness; requires tighter board-level ESD controls | Choose LM2904BQDR for higher-speed feedback loops (>100 kHz) where enhanced EMI filtering and 125°C operation remain critical |
Compared with LM2904DR and LM2904BQDR, the LM2904AVQDR provides the tightest input offset voltage (±2 mV) within the LM2904 family while retaining full –40°C to +125°C operation and 500 V HBM ESD rating - making it optimal for precision analog sensing in harsh environments where layout space precludes external trimming.
Availability
LM2904AVQDR is available at Aetrix Electronics and suitable for industrial motor control, automotive HVAC systems, and smart appliance power management requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM2904AVQDR 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 solutions.
The LM2904 family was designed specifically for cost-sensitive, high-reliability analog signal conditioning in automotive, industrial, and consumer applications - emphasizing wide supply range, ground-sensing capability, and extended temperature operation without external compensation.
FAQ
What is the maximum supply voltage for LM2904AVQDR?
The LM2904AVQDR supports a maximum supply voltage of 30 V (V+ to V–). This rating is specified in the Absolute Maximum Ratings table and applies across its full operating temperature range of –40°C to +125°C. Exceeding 30 V risks permanent damage, even briefly. For designs targeting 36 V rails, TI's LM2904BQDR (rated to 36 V) is a functionally similar alternative with higher voltage tolerance.
Does LM2904AVQDR support rail-to-rail output swing?
No, the LM2904AVQDR does not provide rail-to-rail output swing. Its output typically swings to within 1.5 V of V+ and 20 mV of V– (at 1 mA load, TA = –40°C to +125°C). This limitation is inherent to its bipolar output stage. For true rail-to-rail output, consider TI's TLV2462 or similar CMOS op-amps - but note those lack the LM2904AVQDR's 125°C rating and EMI filtering.
Is LM2904AVQDR pin-compatible with LM2904DR?
Yes, LM2904AVQDR is pin-compatible with LM2904DR: both use the same SOIC-8 (D) package with identical pinout (OUT1, IN1–, IN1+, V–, IN2+, IN2–, OUT2, V+). No PCB changes are required when upgrading from LM2904DR to LM2904AVQDR, provided the design accommodates the tighter ±2 mV offset and same thermal/power behavior.
What is the input bias current specification for LM2904AVQDR?
The LM2904AVQDR has a typical input bias current of 15 nA and a maximum of 100 nA at 25°C (per the LM2904BA electrical characteristics table). At full temperature range (–40°C to +125°C), the max increases to 150 nA. This low bias current minimizes voltage error in high-impedance sensor interfaces such as thermistors or photodiodes, especially when paired with ≥100 kΩ source impedances.
How does the EMI/RF filtering in LM2904AVQDR improve system-level robustness?
The LM2904AVQDR integrates on-die RF and EMI filtering that attenuates high-frequency noise (typically >10 MHz) coupled from switching regulators, motor drivers, or radio transceivers. This reduces susceptibility to erratic output behavior or offset shifts during EMC testing - eliminating the need for external RC filters or ferrite beads at each amplifier input, thereby saving board space and improving long-term reliability in electrically noisy environments.
LM2904AVQDR 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:
- 1 mV
- Current - Supply:
- 500µA (x2 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM2904AVQDR FAQ
1.How can I place an order for LM2904AVQDR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904AVQDR 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 LM2904AVQDR reliable?
The price and inventory of LM2904AVQDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904AVQDR is usually 5 days.
3.What payment methods are accepted for LM2904AVQDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904AVQDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904AVQDR?
LM2904AVQDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904AVQDR 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 LM2904AVQDR?
For technical support, including LM2904AVQDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904AVQDR requirements.
6.How does Aetrix verify that LM2904AVQDR is sourced from the original manufacturer or authorized distributors?
All LM2904AVQDR 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 LM2904AVQDR meets industry standards.
7.What is the process for return or replacement of LM2904AVQDR?
All LM2904AVQDR units undergo pre-shipment inspection (PSI). If there is an issue with LM2904AVQDR, 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 LM2904AVQDR part is unused and in its original packaging.
Return procedure for LM2904AVQDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2904AVQDR Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
