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Texas Instruments LM2904M
- Part No.:
- LM2904M
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2904M.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,583
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Product details
Overview
LM2904M from Texas Instruments is a dual, low-power, internally frequency-compensated operational amplifier designed for single-supply operation from 3 V to 26 V. It features 1 MHz unity-gain bandwidth, 100 dB large-signal voltage gain, and rail-to-rail output swing capability down to ground-enabling direct interfacing with microcontrollers and sensors in battery-powered industrial monitoring systems.
For engineers reviewing the LM2904M datasheet, LM2904M pinout, LM2904M application, or LM2904M equivalent, key selection considerations include its −40°C to +85°C operating temperature range, input common-mode voltage range extending to ground, low 500 µA supply current per amplifier, and SOIC-8 package compatibility with legacy PCB layouts.
Technical Context
The LM2904M uses a PNP-input stage enabling true ground-sensing at both inputs and rail-to-ground output swing-even when powered from a single supply. Its internal frequency compensation ensures stable unity-gain operation without external components.
It delivers 20 mA source / 10 mA sink output current under 15 V supply, supports differential input voltages up to the full supply rail, and maintains CMRR ≥50 dB and PSRR ≥50 dB across its rated temperature range-making it suitable for precision DC-coupled signal conditioning where offset drift and supply rejection matter.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single supply: 3 V to 26 V; enables direct use with 3.3 V or 5 V logic rails without level-shifting |
| Unity-Gain Bandwidth | 1 MHz (temperature compensated); supports audio-frequency and sensor signal amplification up to ~100 kHz closed-loop |
| Large-Signal Voltage Gain | 25 V/mV minimum (at 15 V, 2 kΩ load); provides ≥60 dB open-loop gain for accurate DC gain setting |
| Input Offset Voltage | 2 mV max at 25°C; limits DC error in precision transducer amplifiers and current-sense circuits |
| Supply Current per Amplifier | 0.5–1.2 mA over full temperature range; allows dual-opamp functionality in power-constrained portable designs |
| Input Common-Mode Range | Includes ground (0 V) to V+ −1.5 V; permits direct connection of grounded sensors and single-ended sources |
| Output Voltage Swing | Within 20 mV of ground and within 2 V of V+ (at 10 kΩ); supports low-headroom interfacing with ADCs and logic inputs |
Pinout & Package
LM2904M is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package measuring 4.90 mm × 3.91 mm, optimized for automated assembly and thermal performance in industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Output, Channel A | Amplified output of first op-amp; capable of sourcing 20 mA / sinking 10 mA into resistive loads |
| 2 (−INA) | Inverting Input, Channel A | Differential input node for Channel A; accepts signals down to ground with no level shift required |
| 3 (+INA) | Non-Inverting Input, Channel A | Differential input node for Channel A; supports common-mode voltage from ground to V+ −1.5 V |
| 4 (GND) | Ground / Negative Supply | Reference node for single-supply operation; serves as return path for both amplifiers and bias network |
| 5 (+INB) | Non-Inverting Input, Channel B | Differential input node for second op-amp; electrically identical to Pin 3 with independent input stage |
| 6 (−INB) | Inverting Input, Channel B | Differential input node for Channel B; shares same PNP-input architecture and voltage range as Pin 2 |
| 7 (OUTB) | Output, Channel B | Amplified output of second op-amp; fully independent of OUTA with no crosstalk above −120 dB |
| 8 (V+) | Positive Supply | Main power rail for both amplifiers; supplies internal bias network and output stage with minimal current variation vs. voltage |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation with ground-sensing inputs | Enables direct interface with 0 V-referenced sensors (e.g., thermistors, strain gauges) without external biasing networks |
| Internally frequency compensated for unity gain | Eliminates need for external compensation capacitors-reducing BOM count and layout complexity in gain blocks |
| Low input offset voltage (2 mV max) | Minimizes DC error in precision instrumentation amplifiers and 4–20 mA transmitter front-ends |
| Temperature-compensated unity-gain crossover frequency | Maintains consistent small-signal bandwidth across −40°C to +85°C-critical for automotive cabin sensors |
| Independent amplifier channels with high isolation | −120 dB amplifier-to-amplifier coupling prevents cross-talk in dual-path signal chains (e.g., differential receiver + reference buffer) |
Applications
| Transducer Signal Conditioning | 4–20 mA Current Loop Transmitter |
|---|---|
Use Scenario: Amplifying low-level output from a pressure transducer (0–100 mV) referenced to system ground in an industrial PLC analog input module. IC Role / Device Role / Timing Role: Dual op-amp configured as precision non-inverting amplifier (Channel A) and reference buffer (Channel B) for DAC-generated loop current setpoint. Use Value: Ground-sensing inputs eliminate need for input bias resistors; rail-to-ground output drives current-sense resistor directly, reducing component count and thermal drift. | Use Scenario: Converting a 0–5 V control signal into a proportional 4–20 mA loop current for field devices in process automation. IC Role / Device Role / Timing Role: Channel A used as voltage-to-current converter with external MOSFET; Channel B buffers reference voltage for current-setting resistor network. Use Value: Low supply current (≤1.2 mA per amp) minimizes self-heating in sealed enclosures; wide supply range accommodates 24 V loop power with margin. |
| Active Filter for Sensor Interface | Microcontroller Analog Front-End |
Use Scenario: Implementing a 2nd-order low-pass filter (fc = 10 kHz) to suppress EMI on thermocouple leads before ADC sampling. IC Role / Device Role / Timing Role: Dual op-amp configured as Sallen-Key topology-Channel A as gain stage, Channel B as unity-gain buffer isolating filter from ADC input capacitance. Use Value: 1 MHz bandwidth supports filter Q-factor stability; input common-mode range including ground avoids DC blocking caps in AC-coupled paths. | Use Scenario: Providing signal conditioning for analog sensor inputs (e.g., ambient light, humidity) in a battery-powered IoT node using a 3.3 V MCU. IC Role / Device Role / Timing Role: Channel A amplifies photodiode current; Channel B level-shifts and buffers output for 12-bit SAR ADC with 0–3.3 V input range. Use Value: 500 µA supply current per amplifier extends battery life; rail-to-ground output ensures full ADC code utilization without negative rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM358DR | Wider operating temperature range (0°C to 70°C vs. −40°C to 85°C); higher input offset voltage (7 mV max) | Not qualified for extended industrial or automotive ambient conditions; less suitable for precision DC-coupled sensing | Select LM2904M when operation below −25°C or above 70°C is required, or when lower input offset is critical |
| TLV2372IDR | Rail-to-rail input and output; lower supply current (80 µA/amp); narrower supply range (2.7–16 V) | Better for ultra-low-power battery applications but incompatible with 24 V industrial supplies or legacy 5 V designs | Choose TLV2372IDR only if rail-to-rail I/O and sub-100 µA supply current are mandatory-and 24 V operation is unnecessary |
Compared with LM358DR and TLV2372IDR, the LM2904M uniquely balances extended temperature capability, ground-sensing input, and 3–26 V supply flexibility-making it the preferred choice for industrial analog signal chains requiring robustness and design reuse across multiple platforms.
Availability
LM2904M is available at Aetrix Electronics and suitable for industrial sensor interfaces, 4–20 mA loop transmitters, and microcontroller analog front-ends requiring stable component supply across long production lifecycles.
Supply support for LM2904M 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 company delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM2904M belongs to TI's LMx58-N family of low-power dual op-amps engineered for cost-sensitive, single-supply industrial signal conditioning-prioritizing ground-referenced operation, wide supply tolerance, and production reliability over rail-to-rail I/O or ultra-low quiescent current.
FAQ
What is the maximum supply voltage for LM2904M?
The LM2904M supports a maximum single-supply voltage of 26 V, or dual supplies of ±13 V. This rating is strictly defined in the Absolute Maximum Ratings table and must not be exceeded-even momentarily-to prevent device damage. Operation above 26 V risks junction breakdown and permanent failure, as confirmed by TI's SNOSBT3I datasheet Section 6.1.
Does LM2904M support rail-to-rail output swing?
The LM2904M provides rail-to-ground output swing (down to within 20 mV of GND at 10 kΩ load), but does not swing fully to V+. Its high-side output limit is typically V+ −2 V under load. This asymmetric swing is inherent to its PNP-input, class-AB output architecture-confirmed in Electrical Characteristics Table 6.6, where VOH = 22 V min at V+ = 26 V and RL = 2 kΩ.
Can LM2904M operate from a 3.3 V supply?
Yes, LM2904M is fully specified to operate from 3 V to 26 V single supply. At 3.3 V, it maintains functional input common-mode range (0 V to 1.8 V), 1 MHz unity-gain bandwidth, and usable output swing (≥0.1 V to ≥2.3 V). This makes LM2904M compatible with modern 3.3 V microcontrollers and sensors-verified in Recommended Operating Conditions (Section 6.3) and Typical Characteristics (Figure 3).
What is the input bias current specification for LM2904M?
The LM2904M exhibits an input bias current of 45–250 nA at 25°C, with typical value of 45 nA. This parameter is measured at the PNP input terminals and remains relatively constant over supply voltage-unlike CMOS op-amps. The datasheet confirms this in Section 6.6, where "Input Bias Current" is listed as MIN = 45 nA, TYP = 45 nA, MAX = 250 nA for LM2904 under V+ = 5 V conditions.
Is LM2904M pin-compatible with LM358?
Yes, LM2904M and LM358 share identical SOIC-8 pinout, electrical behavior, and functional block diagram-both conform to the industry-standard dual op-amp footprint. However, LM2904M is rated for −40°C to +85°C operation while LM358 is limited to 0°C to +70°C, and LM2904M has tighter input offset voltage spec (2 mV max vs. 7 mV max). These differences are documented in TI's SNOSBT3I datasheet Tables 6.3 and 6.6.
LM2904M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 45 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 1mA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM2904M FAQ
1.How can I place an order for LM2904M through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904M 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 LM2904M reliable?
The price and inventory of LM2904M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904M is usually 5 days.
3.What payment methods are accepted for LM2904M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904M?
LM2904M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904M 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 LM2904M?
For technical support, including LM2904M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904M requirements.
6.How does Aetrix verify that LM2904M is sourced from the original manufacturer or authorized distributors?
All LM2904M 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 LM2904M meets industry standards.
7.What is the process for return or replacement of LM2904M?
All LM2904M units undergo pre-shipment inspection (PSI). If there is an issue with LM2904M, 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 LM2904M part is unused and in its original packaging.
Return procedure for LM2904M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2904M 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
Texas Instruments
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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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