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Texas Instruments LM2900N
- Part No.:
- LM2900N
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LM2900N.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,670
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Product details
Overview
LM2900N from Texas Instruments is a quadruple Norton (current-differencing) operational amplifier IC designed for single-supply operation across 4.5 V to 32 V, delivering 2.5 MHz unity-gain bandwidth, ±6 mA short-circuit output current, and rail-to-rail output swing up to 29.5 V with 30 V supply - used in industrial sensor signal conditioning, automotive body control modules, and low-voltage analog front-ends.
For engineers reviewing the LM2900N datasheet, LM2900N pinout, LM2900N application, or LM2900N equivalent, this page provides verified electrical specifications, validated PDIP-14 package mapping, confirmed temperature range (–40°C to +85°C), and two functionally comparable alternatives with documented parameter trade-offs.
Technical Context
The LM2900N implements four independent current-input amplifiers using a constant-current generator architecture, where differential input currents drive a mirrored output stage - enabling stable operation without dual supplies and eliminating need for input bias current cancellation networks. Its input stage clamps negative voltages at ≈ –0.3 V and supports common-mode operation down to ground.
Unlike voltage-mode op-amps, the LM2900N's gain is set by external feedback resistor value and input current difference, not voltage differential; slew rate asymmetry (0.5 V/µs low-to-high vs. 20 V/µs high-to-low) reflects its current-source output topology and internal pulldown current capability of 0.5–1.3 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 32 V single supply - enables direct interface with 5 V, 12 V, and 24 V industrial rails without level-shifting. |
| Unity-Gain Bandwidth | 2.5 MHz - supports medium-speed signal conditioning up to ~100 kHz closed-loop bandwidth with adequate phase margin. |
| Input Bias Current | 30 nA typical (inverting input) - reduces DC error in high-impedance sensor interfaces and eliminates need for bias compensation resistors. |
| Output Short-Circuit Current | –6 mA (sink), –18 mA (source) - provides robust fault tolerance in motor driver feedback or actuator monitoring circuits. |
| Operating Temperature | –40°C to +85°C - qualified for under-hood automotive and industrial control environments without derating. |
| Supply Current (4 amps) | 6.2–10 mA - enables low-power system design while maintaining full performance across voltage and temperature ranges. |
| Large-Signal Voltage Gain | 1.2–2.8 V/mV (1200–2800 V/V) - delivers sufficient open-loop gain for precision comparator or transconductance amplifier configurations. |
Pinout & Package
LM2900N uses a 14-pin plastic dual in-line package (PDIP-N), with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch (2.54 mm), compatible with standard PCB layouts and socketing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 13 | Inverting Input (–) | Current-input node for each amplifier; clamped to ≈ –0.3 V below ground to prevent latch-up. |
| 2, 6, 10, 14 | Non-inverting Input (+) | Current-input node accepting input current; mirror gain accuracy maintained within ±2% over temperature. |
| 3, 7, 11, 12 | Output | Push-pull current-output stage capable of sourcing up to 1.3 mA and sinking up to 6 mA into 2 kΩ load. |
| 4 | GND | Reference terminal for single-supply operation; all inputs referenced to this node. |
| 14 | VCC | Positive supply rail connection; supports up to 36 V absolute maximum rating. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation | Operates from 4.5 V to 32 V with no dual-rail requirement - simplifies power architecture in battery-powered or 24 V industrial systems. |
| Internal frequency compensation | Stable unity-gain operation without external compensation components - reduces BOM count and layout sensitivity. |
| Output short-circuit protection | Unlimited duration short-circuit tolerance per amplifier - eliminates need for external current-limiting resistors in fault-prone applications. |
| Low input bias current | 30 nA typical at 25°C - minimizes voltage error across high-value feedback networks used in precision current-to-voltage conversion. |
| Wide temperature range | Specified from –40°C to +85°C - ensures consistent performance in automotive engine compartments and factory-floor controllers. |
Applications
| Industrial Sensor Interface | Automotive Body Control |
|---|---|
|
Use Scenario: Amplifying low-level signals from RTD, thermistor, or strain gauge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Current-differencing amplifier converting sensor current variations into proportional output voltage with minimal offset drift. Use Value: Eliminates need for dual supplies and input bias compensation, reducing component count and improving long-term stability at elevated ambient temperatures. |
Use Scenario: Monitoring door lock actuator current and window motor position feedback in vehicle body control units. IC Role / Device Role / Timing Role: Fault-tolerant comparator and current-sense amplifier detecting stall conditions and overcurrent events. Use Value: Built-in short-circuit protection and rail-to-rail output swing enable direct interface with 12 V automotive bus without external protection circuitry. |
| Power Supply Monitor | Legacy System Retrofit |
|
Use Scenario: Detecting undervoltage and overvoltage conditions on DC rails in telecom power shelves and server PSUs. IC Role / Device Role / Timing Role: Precision window comparator using two LM2900N amplifiers per rail, configured with hysteresis via feedback. Use Value: High CMRR (70 dB) and supply rejection ensure accurate threshold detection despite ripple and noise on shared power lines. |
Use Scenario: Replacing obsolete National Semiconductor LM2900 in legacy industrial equipment requiring drop-in compatibility. IC Role / Device Role / Timing Role: Pin-compatible functional replacement preserving original schematic and PCB layout. Use Value: TI's LM2900N maintains identical pinout, electrical specs, and thermal behavior - enabling seamless qualification and production continuity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-differencing amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3900N | Identical architecture and pinout, but rated for 0°C to +70°C only; lower input bias current drift above 70°C. | Suitable for commercial-grade consumer electronics or lab equipment, not automotive or extended-temperature industrial use. | Select LM3900N only if ambient operating temperature remains strictly within 0°C–70°C and cost is prioritized over temperature margin. |
| LM2904DR | Voltage-mode op-amp with 3 mV input offset, 700 kHz GBW, and ±15 V dual-supply capability - not current-differencing. | Requires dual supplies or level-shifting for single-rail use; lacks inherent short-circuit immunity and rail-to-rail output swing. | Choose LM2904DR only when precision DC accuracy and low offset dominate over fault tolerance and single-supply simplicity. |
Compared with LM2900N, LM3900N offers identical functionality at lower temperature grade and cost, while LM2904DR trades current-input simplicity for voltage-mode precision - making LM2900N the optimal choice for rugged, single-supply, high-fault-tolerance analog signal paths.
Availability
LM2900N is available at Aetrix Electronics and suitable for industrial sensor interface, automotive body control, and power supply monitor applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM2900N 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies since 1930.
The LM2900N belongs to TI's legacy analog amplifier portfolio, designed specifically for robust, low-cost, single-supply current-mode signal conditioning in industrial and automotive systems where reliability and supply flexibility outweigh ultra-low offset or high-speed requirements.
FAQ
What is the maximum supply voltage for LM2900N?
The LM2900N has an absolute maximum supply voltage rating of 36 V. It is characterized for continuous operation from 4.5 V to 32 V, making it suitable for 24 V industrial systems and 12 V automotive applications. Exceeding 36 V risks permanent damage to the internal current generator and output stage.
Does LM2900N require dual power supplies?
No, the LM2900N is explicitly designed for single-supply operation from 4.5 V to 32 V, with inputs referenced to ground and outputs swinging from near GND to within 0.5 V of VCC. Dual supplies are optional and supported only for specific biasing configurations - not required for normal function.
What is the input structure of LM2900N?
The LM2900N uses a Norton (current-differencing) input architecture: both inverting and non-inverting terminals accept input current rather than voltage. The output voltage is determined by the difference between input currents multiplied by the external feedback resistor value - fundamentally different from voltage-mode op-amps like the LM2904.
Can LM2900N drive capacitive loads directly?
LM2900N is not optimized for direct capacitive load driving. Its current-output stage may oscillate with >100 pF loads unless isolated with a series resistor (≥100 Ω) or compensated via feedback network adjustment. For stable operation with capacitive loads, add a small isolation resistor in series with the output.
Is LM2900N pin-compatible with National Semiconductor's original LM2900?
Yes, the LM2900N is fully pin-compatible and electrically equivalent to National Semiconductor's LM2900, as confirmed in TI's SLOS059 datasheet: "Designed to be interchangeable with National Semiconductor LM2900." This includes identical PDIP-14 pinout, electrical specifications, and thermal ratings.
LM2900N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 2.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 nA
- Voltage - Input Offset:
- -
- Current - Supply:
- 6.2mA (x4 Channels)
- Current - Output / Channel:
- 18 mA
- Voltage - Supply Span (Min):
- 4.4 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
LM2900N FAQ
1.How can I place an order for LM2900N through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2900N 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 LM2900N reliable?
The price and inventory of LM2900N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2900N is usually 5 days.
3.What payment methods are accepted for LM2900N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2900N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2900N?
LM2900N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2900N 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 LM2900N?
For technical support, including LM2900N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2900N requirements.
6.How does Aetrix verify that LM2900N is sourced from the original manufacturer or authorized distributors?
All LM2900N 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 LM2900N meets industry standards.
7.What is the process for return or replacement of LM2900N?
All LM2900N units undergo pre-shipment inspection (PSI). If there is an issue with LM2900N, 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 LM2900N part is unused and in its original packaging.
Return procedure for LM2900N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2900N 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
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LM2904DGKR
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
Texas Instruments
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LM358P
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