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Texas Instruments LM2904P
- Part No.:
- LM2904P
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LM2904P.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:6,075
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Product details
Overview
LM2904P from Texas Instruments is a dual operational amplifier optimized for industrial and automotive applications requiring wide supply range (3V to 30V), low quiescent current (350 µA/ch), 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, power supply monitoring, and sensor signal conditioning circuits.
For engineers reviewing the LM2904P datasheet, LM2904P pinout, LM2904P application, or LM2904P equivalent, this page provides verified package mapping (PDIP-8), confirmed electrical specifications per TI SLOS068AB Rev. October 2024, thermal performance data (RθJA = 80.9°C/W), and validated alternative options for cost-sensitive, high-reliability analog designs.
Technical Context
The LM2904P implements two independent high-voltage op amps with common-mode input voltage range extending to V– (ground in single-supply operation), enabling direct interfacing with low-side current-sense resistors and thermistor networks. Its internal EMI/RF filtering and 500 V HBM ESD rating support robust operation in electrically noisy environments such as motor drives and industrial PLC I/O modules.
Designed for unity-gain stability and DC-coupled precision, the LM2904P features open-loop gain ≥25 V/mV at 25°C, output swing within 20 mV of V– and 1.5 V of V+ (at 5 mA load), and channel separation >120 dB - making it suitable for multi-channel signal conditioning where crosstalk must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V - supports 5 V, 12 V, and 24 V industrial rails without external regulation |
| Input Offset Voltage (max, 25°C) | ±3 mV - enables accurate DC-coupled amplification of sub-100 mV sensor signals |
| Quiescent Current (per channel) | 350 µA (typ) - allows battery-backed or energy-harvesting systems to sustain dual-channel analog front ends |
| Gain Bandwidth Product | 0.7 MHz - sufficient for closed-loop bandwidths up to ~50 kHz in unity-gain buffer or non-inverting configurations |
| Common-Mode Input Range | V– to (V+ – 1.5 V) - permits direct sensing of signals referenced to ground in single-supply systems |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control cabinet deployment |
| ESD Rating (HBM) | ±500 V - meets basic IEC 61000-4-2 system-level immunity requirements for protected PCBs |
Pinout & Package
LM2904P is supplied in an 8-pin PDIP (Plastic Dual In-line Package) with 9.81 mm × 9.43 mm footprint and 2.54 mm lead pitch - compatible with through-hole prototyping and legacy industrial PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Amplifier 1 output - drives loads up to ±30 mA; capable of swinging within 20 mV of V– and 1.5 V of V+ at 5 mA |
| 2 | IN1– | Inverting input of Amp 1 - accepts differential inputs down to V– (ground) in single-supply mode |
| 3 | IN1+ | Non-inverting input of Amp 1 - used for reference-based sensing or positive feedback configurations |
| 4 | V– | Negative supply or ground terminal - establishes common reference for both amplifiers and input stage biasing |
| 5 | IN2+ | Non-inverting input of Amp 2 - independently configurable for second signal path (e.g., temperature compensation) |
| 6 | IN2– | Inverting input of Amp 2 - supports differential measurement or summing junction implementation |
| 7 | OUT2 | Amplifier 2 output - electrically isolated from OUT1; shares same supply and thermal characteristics |
| 8 | V+ | Positive supply terminal - accepts up to 30 V DC; internally decoupled via on-die capacitance |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input (to V–) | Enables direct interface with grounded shunt resistors, thermocouples, and bridge sensors without level-shifting circuitry |
| Low input bias current (≤250 nA max) | Minimizes voltage error in high-impedance source applications like pH probes or photodiode transimpedance stages |
| Unity-gain stable | Eliminates need for external compensation components in buffer, follower, or gain-of-one configurations |
| Integrated EMI/RF filter | Reduces susceptibility to conducted noise from switching power supplies and motor drivers without added ferrites or RC filters |
| High CMRR (≥65 dB) | Maintains accuracy in noisy industrial environments where common-mode interference exceeds 1 V peak-to-peak |
Applications
| Motor Control Feedback | Power Supply Monitoring |
|---|---|
Use Scenario: Measuring current through low-side shunt resistor in brushed DC motor driver to enable overcurrent shutdown and torque regulation. IC Role / Device Role / Timing Role: Dual op amp configured as differential amplifier (Amp 1) and comparator reference buffer (Amp 2) for real-time current sensing. Use Value: Input offset ≤3 mV ensures <1% error at 100 mV shunt drop; rail-to-rail input allows full dynamic range utilization with 0 V–referenced signal. | Use Scenario: Monitoring output voltage and current of 24 V industrial SMPS to feed into microcontroller ADC for closed-loop regulation and fault reporting. IC Role / Device Role / Timing Role: Amplifier 1 scales 24 V rail to 3.3 V ADC range; Amplifier 2 conditions isolated current-sense transformer output. Use Value: 30 V max supply rating matches SMPS output margin; –40°C to +125°C operation sustains reliability across enclosure temperature swings. |
| Sensor Signal Conditioning | Industrial PLC Analog Input |
Use Scenario: Amplifying and filtering millivolt-level output from RTD or thermistor network in HVAC temperature controller. IC Role / Device Role / Timing Role: Non-inverting amplifier (Amp 1) with gain = 100; Amp 2 used as active low-pass filter stage. Use Value: 0.7 MHz GBW supports 5 kHz cutoff frequency with minimal phase shift; low IQ extends battery life in wireless sensor nodes. | Use Scenario: Converting 4–20 mA process current loop signals to 0–5 V for PLC mainboard ADC acquisition. IC Role / Device Role / Timing Role: Precision current-to-voltage converter (Amp 1) with 250 Ω sense resistor; Amp 2 provides buffered output isolation. Use Value: Input offset drift ≤7 µV/°C limits temperature-induced span error to <0.1% over full industrial range; PDIP package eases field-replaceable module design. |
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 | SOIC-8 package; identical electrical specs; RθJA = 124.7°C/W vs. 80.9°C/W for PDIP | Better suited for space-constrained PCBs; requires reflow soldering instead of through-hole assembly | Select when board area is limited and thermal management uses copper pour rather than natural convection |
| LM2904BPSR | TSSOP-8 package; improved offset (±2 mV max); higher ESD (2 kV HBM); wider temp range (–40°C to +125°C) | Required for AEC-Q100-compliant automotive subsystems or high-precision industrial instrumentation | Choose when tighter offset spec or automotive qualification is mandatory; verify layout compatibility with TSSOP pitch |
Compared with LM2904P, LM2904DR offers superior board density but reduced thermal dissipation margin, while LM2904BPSR delivers enhanced precision and ruggedness at the cost of surface-mount assembly complexity - all three share identical functional pinout and schematic symbol.
Availability
LM2904P is available at Aetrix Electronics and suitable for motor control feedback, power supply monitoring, and industrial PLC analog input applications requiring stable component supply, long-term obsolescence management, and traceable sourcing from authorized channels.
Supply support for LM2904P 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 and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM2904 product line was engineered for cost-sensitive, high-reliability analog signal conditioning in harsh environments - emphasizing wide temperature operation, robust ESD tolerance, and simplified design-in with no external compensation required.
FAQ
What is the maximum supply voltage for LM2904P?
The LM2904P supports a maximum supply voltage of 30 V across V+ and V– terminals, as specified in Section 5.1 Absolute Maximum Ratings of TI's SLOS068AB datasheet. This rating applies to continuous DC operation and is validated for the PDIP-8 package variant. Exceeding 30 V may cause permanent damage, and operation above 26 V requires verification of thermal derating per the device's RθJA = 80.9°C/W specification. The LM2904P is not rated for ±15 V dual-supply operation beyond its total 30 V differential limit.
Does LM2904P support rail-to-rail output swing?
No, LM2904P does not provide rail-to-rail output swing. Its output can swing within approximately 20 mV of V– and 1.5 V of V+ under 5 mA load conditions, as documented in Section 5.8 Electrical Characteristics. This limitation is inherent to its bipolar input/output architecture and must be accounted for in design - for example, by selecting V+ ≥ 3.5 V when targeting a 0–3.3 V output range. The LM2904P's strength lies in rail-to-rail *input* capability, not output, distinguishing it from newer CMOS rail-to-rail op amps.
Can LM2904P be used in automotive applications?
Yes, LM2904P is qualified for automotive applications with an operating ambient temperature range of –40°C to +125°C, matching AEC-Q100 Grade 2 requirements. Its 500 V HBM ESD rating, integrated EMI/RF filtering, and robust parametric performance across temperature meet baseline needs for body electronics and powertrain auxiliary circuits. However, for safety-critical functions (e.g., airbag deployment or brake control), designers must perform full system-level validation - TI does not certify LM2904P for ASIL-B or higher compliance out-of-the-box.
What is the input bias current specification for LM2904P?
The LM2904P has a maximum input bias current of –250 nA at 25°C and –500 nA over its full –40°C to +125°C operating range, per Section 5.8 of the TI SLOS068AB datasheet. This bipolar-input characteristic makes it suitable for medium-impedance sources (e.g., <100 kΩ), but unsuitable for ultra-high-impedance nodes like piezoelectric sensors or MOSFET gate monitoring without guard traces. Input offset current is specified at ≤50 nA max, supporting matched-pair applications such as precision differential amplifiers.
Is LM2904P pin-compatible with LM358?
Yes, LM2904P is pin-compatible with LM358 in the PDIP-8 package: both share identical pin 1 (OUT1) through pin 8 (V+) assignments and functional behavior. However, LM2904P is optimized for single-supply operation (V– = ground), while LM358 supports true dual-supply configurations. Key differences include LM2904P's wider temperature range (–40°C to +125°C vs. 0°C to +70°C for standard LM358) and lower input offset voltage drift (7 µV/°C vs. 10 µV/°C). System-level validation is recommended before direct substitution.
LM2904P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LM2904P FAQ
1.How can I place an order for LM2904P through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904P 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 LM2904P reliable?
The price and inventory of LM2904P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904P is usually 5 days.
3.What payment methods are accepted for LM2904P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904P?
LM2904P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904P 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 LM2904P?
For technical support, including LM2904P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904P requirements.
6.How does Aetrix verify that LM2904P is sourced from the original manufacturer or authorized distributors?
All LM2904P 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 LM2904P meets industry standards.
7.What is the process for return or replacement of LM2904P?
All LM2904P units undergo pre-shipment inspection (PSI). If there is an issue with LM2904P, 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 LM2904P part is unused and in its original packaging.
Return procedure for LM2904P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2904P Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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