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Texas Instruments LM2902NSR
- Part No.:
- LM2902NSR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
LM2902NSR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,512
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Product details
Overview
LM2902NSR from Texas Instruments is a quad operational amplifier optimized for single-supply operation, featuring rail-to-rail input (common-mode down to V–), 3V to 36V supply range, ±3mV max input offset voltage (25°C), 1.2MHz gain-bandwidth product, and 240µA per amplifier quiescent current. It serves as a precision signal conditioning and level-shifting IC in industrial power supplies and embedded control interfaces.
For engineers reviewing the LM2902NSR datasheet, LM2902NSR pinout, LM2902NSR application, or LM2902NSR equivalent, key selection criteria include its extended temperature range (–40°C to +125°C), integrated EMI/RF filtering, drop-in compatibility with legacy LM2902 variants, and validated performance under high common-mode transients in motor drive feedback loops.
Technical Context
The LM2902NSR implements a standard voltage-feedback op-amp architecture with B-version enhancements: unity-gain stable design, input stage capable of differential voltage up to full supply rails, and common-mode input range extending to the negative rail. Its internal compensation ensures stability with capacitive loads up to 100pF without external compensation.
It operates across –40°C to +125°C with guaranteed specifications including 70dB minimum CMRR over full temperature, 65dB PSRR, and 120dB channel separation at 1kHz–20kHz - enabling reliable multi-channel sensing in noisy industrial environments without crosstalk-induced measurement error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - supports wide-input industrial DC supplies and battery-backed systems without regulation overhead |
| Input Offset Voltage (max) | ±3mV at 25°C - enables accurate low-level signal amplification (e.g., <100mV sensor outputs) without trimming |
| Gain-Bandwidth Product | 1.2MHz - sufficient for closed-loop gains up to ~120 at 10kHz, suitable for motor current sensing and power supply error amplifiers |
| Quiescent Current per Amp | 240µA typical at 5V - allows four independent channels in ultra-low-power monitoring nodes |
| Common-Mode Input Range | V– to (V+) – 2V - permits direct interface with ground-referenced sensors and shunt-based current monitors |
| Output Swing (V–) | 5mV to 20mV above V– at 1mA load - delivers near-rail low-side output for ADC reference alignment |
| ESD Rating (HBM) | 2kV - meets IEC 61000-4-2 Level 2 for robustness in factory automation and HVAC control panels |
Pinout & Package
LM2902NSR is packaged in a 14-pin SOP (Small Outline Package) with dimensions 10.3mm × 7.8mm, optimized for surface-mount assembly on space-constrained industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN– | Inverting input (Amplifier 1) | Accepts feedback or inverted signal path; referenced to V– for single-supply biasing |
| 1IN+ | Non-inverting input (Amplifier 1) | Connects to sensor, reference, or signal source; supports common-mode down to V– |
| 1OUT | Output (Amplifier 1) | Drives loads up to 1mA within 20mV of V–; stable with ≤100pF capacitive load |
| 2IN–, 2IN+, 2OUT | Inverting/non-inverting inputs & output (Amplifier 2) | Independent channel with identical specs; no internal coupling or shared bias paths |
| 3IN–, 3IN+, 3OUT | Inverting/non-inverting inputs & output (Amplifier 3) | Electrically isolated channel; validated for simultaneous use in multi-sensor systems |
| 4IN–, 4IN+, 4OUT | Inverting/non-inverting inputs & output (Amplifier 4) | Final channel; supports independent gain/offset configuration without interaction |
| VCC+ | Positive supply rail | Accepts 3V–36V; decoupling required at pin for EMI immunity per TI layout guidelines |
| VCC– | Negative supply or ground | Serves as system ground reference in single-supply mode; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in replacement for LM2902 | Pin-compatible with legacy LM2902 variants (including LM2902K), enabling direct upgrade without PCB change |
| Integrated EMI/RF filter | Reduces susceptibility to 30MHz–1GHz noise in switching power supply environments without external RC filters |
| Low input bias current | ≤35nA max across –40°C to +125°C - preserves accuracy in high-impedance pH or thermocouple sensor interfaces |
| Rail-to-rail input capability | Operates with inputs at V–, eliminating need for level-shifting circuitry in ground-referenced applications |
| High channel separation | 120dB at 1kHz–20kHz - prevents signal leakage between independent feedback loops in multi-axis motor controllers |
Applications
| Industrial Power Supply Monitoring | Motor Drive Current Sensing |
|---|---|
Use Scenario: Real-time voltage and current monitoring in 24V/48V DC-DC converters for factory automation PLCs. IC Role / Device Role / Timing Role: Quad op-amp configured as two differential amplifiers (voltage/current sense) and two comparators (overvoltage/overcurrent flags). Use Value: Single LM2902NSR replaces four discrete op-amps, reducing BOM count and improving thermal tracking between sensing channels. | Use Scenario: Shunt-based phase current measurement in 3-phase BLDC inverters for HVAC compressors. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with matched gain/offset across all three phases. Use Value: Guaranteed ±3mV offset and 70dB CMRR ensure <1% current measurement error despite high dv/dt noise from IGBT switching. |
| Smart Appliance Control Panel | Uninterruptible Power Supply (UPS) Battery Management |
Use Scenario: Signal conditioning for touch-button analog readout, temperature sensing, and LED dimming feedback in washing machine control boards. IC Role / Device Role / Timing Role: Multi-function analog frontend: one amp for NTC biasing, one for button voltage divider scaling, two for LED current regulation feedback. Use Value: 240µA per amplifier enables always-on sensing while maintaining <1mA total quiescent draw for energy certification compliance. | Use Scenario: Cell voltage balancing and charge/discharge current monitoring in 12–48V lead-acid/LiFePO₄ UPS systems. IC Role / Device Role / Timing Role: Four independent amplifiers for simultaneous cell voltage acquisition and shunt-based current integration. Use Value: –40°C to +125°C rating ensures reliable operation inside battery enclosures during high-temperature charging cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2902DR | Same electrical specs; SOIC-14 package (8.65mm × 6mm), slightly larger footprint than NSR's SOP-14 | Preferred for wave-soldered through-hole compatible designs; less suited for fine-pitch SMT lines | Select LM2902DR when board assembly uses mixed-technology processes or requires higher thermal mass for rework |
| LM2902PW | TSSOP-14 package (5mm × 6.4mm); identical AC/DC specs but lower RθJA (124.7°C/W vs NSR's 90.4°C/W) | Better suited for high-density layouts with limited airflow; requires tighter stencil aperture control | Choose LM2902PW for compact consumer electronics where board area is constrained and ambient temperature stays below 70°C |
Compared with LM2902DR and LM2902PW, the LM2902NSR offers optimal balance of thermal performance (90.4°C/W), board area (10.3mm × 7.8mm), and compatibility with standard SOP-14 pick-and-place tooling - making it the preferred choice for industrial-grade power conversion and motor control modules requiring long-term reliability.
Availability
LM2902NSR is available at Aetrix Electronics and suitable for industrial power supply monitoring, motor drive current sensing, and smart appliance control panels requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM2902NSR 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 over 50 years of op-amp innovation and broad industrial application expertise.
The LM2902 series belongs to TI's general-purpose operational amplifier product line, designed specifically for cost-sensitive, high-reliability industrial and automotive subsystems requiring robust single-supply operation and long-term parametric stability.
FAQ
What is the maximum operating temperature range for LM2902NSR?
The LM2902NSR is rated for operation from –40°C to +125°C, with full electrical specifications guaranteed across this extended industrial temperature range. This makes LM2902NSR suitable for deployment in harsh environments such as motor drive enclosures, outdoor HVAC units, and industrial power supply housings where ambient temperatures exceed standard commercial limits.
Does LM2902NSR support true rail-to-rail input operation?
Yes, LM2902NSR supports rail-to-rail input operation with common-mode voltage range extending to the negative supply rail (V–). Its input stage operates down to V–, enabling direct interfacing with ground-referenced sensors and shunt resistors without level-shifting circuitry - a key advantage over earlier LM2902 variants that required ≥1.5V headroom below V+.
Can LM2902NSR replace legacy LM2902 devices without circuit modification?
Yes, LM2902NSR is a drop-in replacement for all standard LM2902 variants (including LM2902K and LM2902KV) in SOP-14 packages. It maintains identical pinout, electrical behavior, and thermal characteristics, allowing direct substitution in existing designs without layout changes, firmware updates, or recalibration - provided the application falls within the –40°C to +125°C range.
What is the typical quiescent current per amplifier in LM2902NSR?
The typical quiescent current per amplifier in LM2902NSR is 240µA at 5V supply and –40°C to +125°C, rising to 300µA maximum. This ultra-low power consumption enables four independent amplifiers to operate continuously in battery-backed or energy-harvested systems while maintaining sub-1.2mA total supply current - critical for meeting IEC 62304 and ENERGY STAR standby requirements.
How does LM2902NSR handle electromagnetic interference in noisy industrial settings?
LM2902NSR incorporates an integrated RF and EMI filter in its input stage, providing enhanced immunity to 30MHz–1GHz noise commonly generated by switching power supplies and motor drives. Tested per IEC 61000-4-3, it maintains specified offset and gain accuracy under 10V/m radiated fields - eliminating the need for external ferrite beads or RC filters in most industrial control applications.
LM2902NSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 1.4mA (x4 Channels)
- Current - Output / Channel:
- 30 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:
- 14-SO
LM2902NSR FAQ
1.How can I place an order for LM2902NSR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2902NSR 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 LM2902NSR reliable?
The price and inventory of LM2902NSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2902NSR is usually 5 days.
3.What payment methods are accepted for LM2902NSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2902NSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2902NSR?
LM2902NSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2902NSR 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 LM2902NSR?
For technical support, including LM2902NSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2902NSR requirements.
6.How does Aetrix verify that LM2902NSR is sourced from the original manufacturer or authorized distributors?
All LM2902NSR 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 LM2902NSR meets industry standards.
7.What is the process for return or replacement of LM2902NSR?
All LM2902NSR units undergo pre-shipment inspection (PSI). If there is an issue with LM2902NSR, 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 LM2902NSR part is unused and in its original packaging.
Return procedure for LM2902NSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2902NSR Tags
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