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Texas Instruments LP2902N/PB
- Part No.:
- LP2902N/PB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LP2902N/PB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,867
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Product details
Overview
LP2902N/PB from Texas Instruments is a micropower quad operational amplifier in 14-pin PDIP package, featuring 85 μA typical supply current, 2 mV typical input offset voltage, and rail-to-ground input common-mode range. It operates from 3 V to 26 V single supply and is optimized for battery-powered instrumentation and low-power sensor signal conditioning.
For engineers reviewing the LP2902N/PB datasheet, LP2902N/PB pinout, LP2902N/PB application, or LP2902N/PB equivalent, key selection criteria include micropower operation, ground-sensing inputs, CMOS-compatible output drive, and compatibility with legacy LM324-based designs requiring extended temperature range (−40°C to +85°C).
Technical Context
The LP2902N/PB integrates four independent, internally compensated op-amps with class-B output stages enabling both sourcing and sinking capability. Its input stage supports common-mode voltages down to ground, eliminating need for input biasing in single-supply configurations.
It features low-input-bias-current (2 nA typ) PNP input transistors and achieves stable unity-gain operation without external compensation. The device's 100 kHz gain-bandwidth product and 50 V/ms slew rate are optimized for DC-critical, low-frequency applications-not high-speed signal processing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 26 V single supply - enables direct use in 5 V, 12 V, and 24 V industrial/battery systems without regulation. |
| Quiescent Current per Amplifier | 85 μA typical - reduces total system power by >90% vs. LM324, critical for multi-year battery life. |
| Input Offset Voltage | 2 mV typical (max 10 mV) - ensures <±10 mV error in precision DC amplification at room temperature. |
| Input Bias Current | 2 nA typical - minimizes voltage error across high-impedance sources (e.g., pH sensors, photodiodes). |
| Input Common-Mode Range | 0 V to (V+ − 1.5 V) - allows direct interfacing to ground-referenced signals without level-shifting circuitry. |
| Output Voltage Swing | 0.7 V above GND / 1.9 V below V+ (at 350 μA load) - supports wide dynamic range in single-supply data acquisition. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood environments where LM324-N is not rated. |
Pinout & Package
LP2902N/PB is housed in a 14-pin plastic dual in-line package (PDIP-N), 0.300-inch body width, with standard through-hole mounting and JEDEC MS-001 compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Amplifier 1 Output | Class-B buffered output capable of sourcing 10 mA / sinking 5 mA; placed at corner for minimal trace length in feedback loops. |
| 2 | Amplifier 1 Inverting Input | Differential input terminal; adjacent to Pin 1 to simplify compact inverting amplifier layout. |
| 3 | Amplifier 1 Non-Inverting Input | High-impedance PNP input; supports rail-to-ground common-mode range without clamping diodes. |
| 4 | V− (GND) | Ground reference for all amplifiers; required return path for input bias currents and output sink current. |
| 5 | Amplifier 2 Non-Inverting Input | Independent input; identical electrical specs to Pin 3; enables dual-channel sensing without cross-talk. |
| 6 | Amplifier 2 Inverting Input | Paired with Pin 7 for second amplifier; layout symmetry simplifies PCB routing in multi-op-amp circuits. |
| 7 | Amplifier 2 Output | Second independent output; same drive strength and swing as Pin 1; corner placement aids decoupling. |
| 8 | V+ | Positive supply rail; accepts 3–26 V; internal ESD protection limits absolute max to 26 V. |
| 9 | Amplifier 3 Non-Inverting Input | Third channel input; electrically isolated from other channels; supports separate sensor front-ends. |
| 10 | Amplifier 3 Inverting Input | Matches Pin 2/6 functionality; enables three independent gain stages on one IC with shared supply rails. |
| 11 | Amplifier 3 Output | Third output; identical performance to Pins 1 and 7; supports triple-output monitoring or control paths. |
| 12 | Amplifier 4 Inverting Input | Fourth channel inverting input; completes quad configuration; pin order follows industry-standard LM324 layout. |
| 13 | Amplifier 4 Non-Inverting Input | Final input; allows full utilization of all four amplifiers in adder, comparator, or filter topologies. |
| 14 | Amplifier 4 Output | Fourth output; positioned at opposite corner from Pin 1 to balance thermal distribution and reduce crosstalk. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 85 μA per amplifier enables 4-channel analog front-end with <350 μA total quiescent draw - extends coin-cell life to years. |
| Rail-to-ground input | Input common-mode includes 0 V, allowing direct connection to grounded sensors (thermistors, strain gauges) without bias resistors. |
| LM324 pin compatibility | Exact 14-pin PDIP pinout matches LM324; permits drop-in replacement in existing designs while cutting supply current by 10×. |
| Extended temperature range | −40°C to +85°C operation exceeds LM324-N (0°C to +70°C), supporting industrial automation and outdoor electronics. |
| CMOS logic interface | Output swing to within 0.7 V of GND and 1.9 V of V+ ensures reliable TTL/CMOS input thresholds across full supply range. |
Applications
| Portable Gas Sensor Interface | Battery-Powered Data Logger |
|---|---|
|
Use Scenario: Amplifying low-level mV outputs from electrochemical gas sensors powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Quad op-amp provides sensor biasing, transimpedance conversion, filtering, and buffer stages in one package. Use Value: 85 μA per amplifier keeps total analog section current under 400 μA, enabling >5-year battery life at 1-sample-per-minute duty cycle. |
Use Scenario: Signal conditioning for thermistor, humidity, and pressure sensors in remote environmental monitoring nodes. IC Role / Device Role / Timing Role: LP2902N/PB performs ratiometric scaling, offset correction, and anti-alias filtering before ADC sampling. Use Value: Rail-to-ground inputs eliminate need for external bias networks, reducing BOM count and PCB area by 30% vs. rail-splitter solutions. |
| Industrial PLC Analog Input Module | Low-Power Medical Wearable Front-End |
|
Use Scenario: Isolated 4–20 mA loop receiver and voltage-level translation in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Configured as precision current-to-voltage converter, differential amplifier, and reference buffer across four channels. Use Value: −40°C to +85°C rating ensures reliability in uncontrolled cabinet environments where LM324-N fails at cold start. |
Use Scenario: Biopotential signal amplification (ECG, EMG) in patch-style monitors using AAA batteries. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier, high-pass filter, and lead-off detection comparator. Use Value: 2 nA input bias current prevents electrode polarization errors in dry-electrode interfaces, improving signal fidelity over 24-hour wear. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324N | Higher 1.5 mA supply current per amplifier; wider 0°C to +70°C temp range; no guaranteed 2 mV VOS spec. | Acceptable only in non-battery, non-industrial applications where power and temperature margins are relaxed. | Select LM324N only when cost is primary driver and micropower/extended temp are unnecessary. |
| LP324N/NOPB | Identical electrical specs except 0°C to +70°C rating and 32 V max supply (vs. 26 V for LP2902N/PB); same pinout. | Limited to commercial-grade equipment; unsuitable for automotive or industrial deployments requiring −40°C operation. | Choose LP324N/NOPB only if ambient temperature stays above freezing and supply voltage may exceed 26 V. |
Compared with LM324N and LP324N/NOPB, LP2902N/PB uniquely delivers micropower operation *and* industrial temperature range in a drop-in PDIP package-enabling legacy design upgrades without layout changes or thermal derating.
Availability
LP2902N/PB is available at Aetrix Electronics and suitable for portable instrumentation, battery-backed monitoring systems, and industrial analog input modules requiring stable component supply across long production lifecycles.
Supply support for LP2902N/PB 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 expertise in precision op-amps and power-efficient signal chains.
The LP2902N/PB belongs to TI's micropower operational amplifier family, engineered specifically for ultra-low-quiescent-current, ground-sensing analog signal conditioning in space- and energy-constrained systems.
FAQ
What is the maximum supply voltage for LP2902N/PB?
The absolute maximum supply voltage for LP2902N/PB is 26 V (or ±13 V in dual-supply mode). Operating beyond this risks permanent damage. The recommended operating range is 3 V to 26 V single supply, validated across the full −40°C to +85°C temperature range. Exceeding 26 V voids TI's warranty and may trigger internal ESD clamp conduction.
Is LP2902N/PB pin-compatible with LM324N?
Yes, LP2902N/PB is fully pin-compatible with LM324N in the 14-pin PDIP package. All pin functions, numbering, and physical dimensions match exactly. This allows direct replacement in existing LM324N layouts without PCB modification, delivering immediate 10× reduction in supply current and extended temperature capability.
Does LP2902N/PB support rail-to-rail input or output?
LP2902N/PB supports rail-to-ground input (common-mode down to 0 V), but not rail-to-rail output. Its output swings to within 0.7 V of GND and 1.9 V below V+ under 350 μA load. For true rail-to-rail I/O, consider TI's TLV2464 or similar modern alternatives - LP2902N/PB prioritizes micropower and robustness over full swing.
What is the input bias current specification for LP2902N/PB?
The typical input bias current for LP2902N/PB is 2 nA at 25°C, with a maximum of 20 nA across the full −40°C to +85°C operating range. This ultra-low value results from its PNP input stage and enables accurate amplification of signals from high-impedance sources such as piezoelectric sensors and pH electrodes without significant DC error.
Can LP2902N/PB drive capacitive loads?
LP2902N/PB exhibits improved stability driving capacitive loads up to 1000 pF without external compensation, per TI's application hints. However, slew rate (50 V/ms) and bandwidth (100 kHz) are reduced versus LM324 to achieve micropower operation - avoid use in high-frequency closed-loop configurations where phase margin may degrade.
LP2902N/PB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.05V/µs
- Gain Bandwidth Product:
- 100 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 150µA
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 26 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
LP2902N/PB FAQ
1.How can I place an order for LP2902N/PB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2902N/PB 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 LP2902N/PB reliable?
The price and inventory of LP2902N/PB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2902N/PB is usually 5 days.
3.What payment methods are accepted for LP2902N/PB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2902N/PB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2902N/PB?
LP2902N/PB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2902N/PB 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 LP2902N/PB?
For technical support, including LP2902N/PB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2902N/PB requirements.
6.How does Aetrix verify that LP2902N/PB is sourced from the original manufacturer or authorized distributors?
All LP2902N/PB 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 LP2902N/PB meets industry standards.
7.What is the process for return or replacement of LP2902N/PB?
All LP2902N/PB units undergo pre-shipment inspection (PSI). If there is an issue with LP2902N/PB, 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 LP2902N/PB part is unused and in its original packaging.
Return procedure for LP2902N/PB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP2902N/PB Tags
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LM358DT
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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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LM324DR
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MCP6006UT-E/OT
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LM324PWR
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LM2902DR
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LM358P
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