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Texas Instruments LM2904PSR
- Part No.:
- LM2904PSR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
LM2904PSR.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:6,185
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Product details
Overview
LM2904PSR 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, 1.2MHz unity-gain bandwidth, and ±3mV max input offset voltage at 25°C. It serves as a general-purpose signal conditioning and feedback amplifier in power supply control loops and motor driver circuits.
For engineers reviewing the LM2904PSR datasheet, LM2904PSR pinout, LM2904PSR application, or LM2904PSR equivalent, key selection criteria include its extended temperature range (−40°C to +125°C), SO package footprint compatibility, EMI/RF filtering, and validated performance in high-noise motor control and AC inverter systems.
Technical Context
The LM2904PSR implements a bipolar-input, internally compensated two-stage op-amp architecture with common-mode input voltage range extending to V− (ground in single-supply operation) and output swing within 20mV of V− and 1.6V of V+ at 5mA load. Its gain-bandwidth product is fixed at 1.2MHz, and phase margin is guaranteed ≥56° under unity-gain, 10kΩ//20pF load conditions.
Designed for robustness in electrically noisy environments, the device integrates on-chip RF and EMI filters and achieves 2kV HBM ESD rating. It operates across −40°C to +125°C ambient, supporting automotive-grade thermal reliability without derating in typical 12V/24V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 30V - supports direct integration into 12V/24V automotive and industrial rails without external regulators |
| Input Offset Voltage (max) | ±3mV at 25°C - enables accurate low-level signal amplification in current-sense and sensor interfaces |
| Quiescent Current | 300µA per amplifier - allows battery-backed or energy-sensitive designs to maintain dual-channel functionality with minimal standby loss |
| Unity-Gain Bandwidth | 1.2MHz - sufficient for closed-loop control in motor drivers up to ~10kHz PWM frequencies |
| Common-Mode Input Range | Includes V− (ground) - permits direct sensing of shunt resistors referenced to system ground without level-shifting circuitry |
| Output Swing (V− side) | 5–20mV above V− at TA = −40°C to +125°C - ensures reliable low-voltage detection in precision comparator-like configurations |
| ESD Rating (HBM) | 2kV - meets IEC 61000-4-2 Level 3 immunity requirements for industrial control board layout |
Pinout & Package
LM2904PSR is supplied in an 8-pin SO (Small Outline) package measuring 6.2mm × 7.8mm, compatible with standard SOIC-8 footprints and reflow assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Amplifier 1 output | Drives feedback networks or downstream stages; capable of sourcing/sinking ±20mA |
| 2 (IN1−) | Amplifier 1 inverting input | Accepts differential or single-ended signals; common-mode range extends to V− |
| 3 (IN1+) | Amplifier 1 non-inverting input | Used for reference-based sensing or positive feedback; matched bias current to IN1− |
| 4 (V−) | Negative supply / ground | Reference node for single-supply operation; must be low-impedance for stability |
| 5 (IN2+) | Amplifier 2 non-inverting input | Independent channel input; electrically isolated from Channel 1 except via shared supply rails |
| 6 (IN2−) | Amplifier 2 inverting input | Supports differential configuration with IN2+; same CMVR and input impedance as Channel 1 |
| 7 (OUT2) | Amplifier 2 output | Independent output stage; no crosstalk specification but >60dB channel separation at DC |
| 8 (V+) | Positive supply | Accepts up to 30V; internal regulation not required; decoupling capacitor recommended at pin |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input (V− inclusive) | Enables direct connection to ground-referenced current-sense resistors without external biasing |
| Integrated EMI/RF filter | Reduces susceptibility to switching noise from adjacent MOSFET gate drivers or DC-DC converters |
| −40°C to +125°C operating range | Qualified for under-hood automotive and industrial motor drive environments without thermal derating |
| SO-8 package (PS) | Industry-standard footprint with 1.27mm pitch; supports automated optical inspection and IPC-compliant soldering |
| 2kV HBM ESD rating | Eliminates need for external protection diodes in most PCB-level ESD scenarios |
Applications
| Motor Control Feedback | AC Inverter Voltage Sensing |
|---|---|
Use Scenario: Amplifying shunt-resistor voltage in brushed DC or BLDC motor phase-current loops. IC Role / Device Role / Timing Role: Dual-channel op-amp providing simultaneous current sensing and overcurrent comparator reference generation. Use Value: Input offset ≤±3mV ensures <1% error at 100mV sense voltage; rail-to-rail input allows zero-V detection during PWM dead-time. | Use Scenario: Scaling and conditioning DC-link voltage for ADC input in solar string inverters. IC Role / Device Role / Timing Role: Precision buffer and level-shift amplifier between high-voltage divider and MCU analog front-end. Use Value: 1.2MHz GBW supports fast transient response to DC-link ripple; 30V max supply accommodates 25V-rated dividers. |
| Industrial Power Supply Monitoring | Automotive HVAC Blower Control |
Use Scenario: Monitoring output voltage and current in programmable bench PSUs and server PSUs. IC Role / Device Role / Timing Role: Dual op-amp implementing voltage error amplifier and current limit comparator in feedback path. Use Value: 300µA/ch quiescent current minimizes standby loss; SO-8 package fits tight-layout PSU control boards. | Use Scenario: Closed-loop speed control of 12V blower motors using hall-effect rotor position feedback. IC Role / Device Role / Timing Role: Signal conditioner for low-amplitude hall sensor outputs and PWM-driven motor driver interface. Use Value: −40°C to +125°C rating ensures reliability in engine bay proximity; integrated EMI filter suppresses ignition noise coupling. |
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 electrical specs; SOIC-8 (D package), 4.9mm × 6mm footprint - smaller than PS | Preferred where board space is constrained; identical thermal resistance (RθJA = 124.7°C/W) but lower mass | Select LM2904DR when layout density is critical and existing SOIC-8 land pattern allows 1.27mm pitch revision |
| LM2904BPSR | Enhanced version: ±2mV max offset (BA grade), same PS package, identical pinout | Better accuracy for precision current sensing; same temperature range and supply limits | Choose LM2904BPSR when offset-critical applications (e.g., <50mV sense range) require tighter initial tolerance |
Compared with LM2904DR and LM2904BPSR, the LM2904PSR offers the largest SOIC footprint (6.2mm × 7.8mm) for improved thermal dissipation and mechanical robustness in high-vibration environments, while maintaining full functional and pin compatibility with both alternatives.
Availability
LM2904PSR is available at Aetrix Electronics and suitable for industrial motor drives, AC inverters, and automotive HVAC systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2904PSR 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 LM2904PSR belongs to TI's industry-standard dual op-amp family, designed specifically for cost-sensitive, high-reliability applications in power conversion, motor control, and automotive subsystems where robustness and wide supply range are essential.
FAQ
What is the maximum supply voltage for LM2904PSR?
The LM2904PSR supports a maximum supply voltage of 30V (V+ − V−), as specified in the Recommended Operating Conditions table. This rating applies across its full operating temperature range of −40°C to +125°C and enables direct use in 24V industrial and 12V automotive systems without external regulation. Exceeding 30V risks permanent damage per Absolute Maximum Ratings.
Does LM2904PSR support single-supply operation with input referenced to ground?
Yes, LM2904PSR fully supports single-supply operation with inputs referenced to ground. Its common-mode input voltage range explicitly includes V− (ground), allowing direct connection of sensors or shunt resistors tied to system ground. This eliminates the need for external biasing networks in current-sense and level-shifting applications.
What is the output voltage swing capability of LM2904PSR near the negative rail?
At temperatures from −40°C to +125°C, LM2904PSR delivers a minimum output swing of 5mV above V− (ground) under light load (50µA). At 1mA load, it swings within 100mV of V−. This rail-to-rail input with near-rail output capability enables accurate low-voltage signal reproduction in single-supply configurations.
Is LM2904PSR pin-compatible with other LM2904 variants?
Yes, LM2904PSR is pin-compatible with all standard 8-pin LM2904 variants in SO (PS), SOIC (D), TSSOP (PW), and VSSOP (DGK) packages. Pin functions match Table 4-1 exactly: OUT1, IN1−, IN1+, V−, IN2+, IN2−, OUT2, V+. No PCB changes are required when substituting LM2904PSR for LM2904DR or LM2904BPSR in SO-8 layouts.
What thermal performance can be expected from LM2904PSR in SO-8 package?
In its PS (SO) package, LM2904PSR has a junction-to-ambient thermal resistance (RθJA) of 116.9°C/W. With typical power dissipation below 100mW per amplifier, this translates to <12°C junction rise above ambient at 25°C - well within safe operating limits even in sealed enclosures. Board-level copper pour further reduces thermal impedance.
LM2904PSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm 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-SO
LM2904PSR FAQ
1.How can I place an order for LM2904PSR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904PSR 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 LM2904PSR reliable?
The price and inventory of LM2904PSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904PSR is usually 5 days.
3.What payment methods are accepted for LM2904PSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904PSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904PSR?
LM2904PSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904PSR 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 LM2904PSR?
For technical support, including LM2904PSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904PSR requirements.
6.How does Aetrix verify that LM2904PSR is sourced from the original manufacturer or authorized distributors?
All LM2904PSR 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 LM2904PSR meets industry standards.
7.What is the process for return or replacement of LM2904PSR?
All LM2904PSR units undergo pre-shipment inspection (PSI). If there is an issue with LM2904PSR, 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 LM2904PSR part is unused and in its original packaging.
Return procedure for LM2904PSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2904PSR 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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LM2904DGKR
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LM2902DR
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