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Texas Instruments LM2902KNSRG4
- Part No.:
- LM2902KNSRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
LM2902KNSRG4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,016
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Product details
Overview
LM2902KNSRG4 from Texas Instruments is a quad operational amplifier optimized for single-supply operation, featuring rail-to-rail input (common-mode range includes V–), 3V to 36V supply capability, ±3mV max input offset voltage (25°C), 1.2MHz gain-bandwidth product, and 240µA per amplifier quiescent current. It serves as a drop-in replacement for legacy LM2902 variants in power supply monitoring, sensor signal conditioning, and industrial control interfaces.
For engineers reviewing the LM2902KNSRG4 datasheet, LM2902KNSRG4 pinout, LM2902KNSRG4 application, or LM2902KNSRG4 equivalent, key selection criteria include its extended temperature range (–40°C to +125°C), integrated EMI/RF filtering, 2kV HBM ESD rating, and compatibility with cost-sensitive, high-reliability analog front-ends requiring stable DC precision and wide supply flexibility.
Technical Context
The LM2902KNSRG4 implements a standard voltage-feedback op-amp topology with unity-gain stability and internal frequency compensation. Its input stage supports common-mode voltages down to the negative rail, enabling direct interfacing with ground-referenced sensors and transducers without level-shifting circuitry.
It delivers 0.5V/µs slew rate and 4µs settling time to 0.1% for 2V steps, supporting moderate-speed closed-loop configurations such as active filters, comparator hysteresis circuits, and voltage/current feedback loops in AC inverters and UPS systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - enables direct use in 5V, 12V, 24V, and 32V industrial power rails without regulation |
| Input Offset Voltage (max) | ±3mV at 25°C - ensures ≤3mV DC error in precision sensor amplification and reference buffering |
| Quiescent Current (per amp) | 240µA typical at 5V - supports low-power operation in battery-backed or energy-conscious systems |
| Gain-Bandwidth Product | 1.2MHz - sufficient for anti-aliasing filters, audio preamps, and motor control loop compensation up to ~100kHz |
| Common-Mode Input Range | Includes V– (ground) - eliminates need for bias resistors when amplifying unipolar signals like thermistor or RTD outputs |
| Output Swing (V– side) | 5mV to 20mV above V– at –40°C to +125°C - allows near-ground output for ADC interface in single-supply data acquisition |
| ESD Rating (HBM) | 2kV - meets IEC 61000-4-2 Level 2 for robustness in factory automation and outdoor equipment |
Pinout & Package
LM2902KNSRG4 is packaged in a 14-pin SOIC (D package), 8.65mm × 6mm body size, with exposed pad not present. Pin functions are standardized across LMx24 family SOIC variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN– | Inverting input (Amp 1) | Accepts differential signal referenced to feedback network; supports rail-to-rail common-mode |
| 1IN+ | Non-inverting input (Amp 1) | Direct connection to ground-referenced sensors; no external bias required |
| 1OUT | Output (Amp 1) | Capable of sourcing/sinking ±20mA; drives 10kΩ loads to within 1.5V of V+ and 20mV of V– |
| VCC+ | Positive supply | Connects to main system rail (3–36V); decoupling capacitor required at pin |
| VCC– | Negative supply / ground | Return path for all four amplifiers; must be low-impedance for noise immunity |
| 4OUT | Output (Amp 4) | Electrically identical to 1OUT; used for independent channel tasks like fault detection or auxiliary regulation |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs at V– (ground), eliminating level-shifters in single-supply sensor interfaces |
| Integrated EMI/RF filter | Reduces susceptibility to 30MHz–1GHz noise in motor drive and switching power supply environments |
| Drop-in replacement for LM2902 | Pin-compatible and functionally equivalent to legacy LM2902, enabling seamless BOM upgrades |
| High ESD robustness | 2kV HBM rating ensures reliability during PCB handling and field deployment in harsh industrial settings |
| Wide operating temperature | Rated for –40°C to +125°C ambient, supporting under-hood automotive and outdoor HVAC applications |
Applications
| Power Supply Monitoring | Sensor Signal Conditioning |
|---|---|
Use Scenario: Real-time voltage and current sensing in 24V server PSUs and telecom rectifiers. 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: Enables accurate <1% full-scale measurement using low-value shunts and resistive dividers, with rail-to-rail input allowing direct ground-referenced sensing. | Use Scenario: Amplification and linearization of NTC thermistor outputs in air conditioner indoor units. IC Role / Device Role / Timing Role: Single-supply instrumentation amplifier front-end with programmable gain and offset correction. Use Value: Delivers stable 0.5°C accuracy over –25°C to +70°C ambient using only passive components, leveraging ±3mV offset and low drift. |
| Motor Control Feedback | Industrial PLC Analog I/O |
Use Scenario: Current loop feedback in 3-phase inverter gate drivers for HVAC compressors. IC Role / Device Role / Timing Role: Isolated current-sense amplifier input stage feeding isolated sigma-delta ADC. Use Value: Supports 100kHz PWM rejection via 1.2MHz GBW and 0.5V/µs slew rate, minimizing distortion in FOC algorithms. | Use Scenario: 4–20mA transmitter conditioning in DIN-rail mounted PLC modules. IC Role / Device Role / Timing Role: Voltage-to-current converter core with precision reference buffer and loop driver. Use Value: Maintains <0.1% linearity over 3V–36V supply variation due to 65dB PSRR and low IQ drift. |
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 SOIC-14 package; identical electrical specs but rated only to +85°C ambient | Limited to commercial-grade applications (e.g., desktop PC, printers); not qualified for automotive or extended-temp industrial use | Select LM2902KNSRG4 when operation beyond +85°C or enhanced ESD (2kV vs. 500V HBM) is required |
| LM2902BDR | B-version with improved 2mV max offset (BA variant), lower 7μV/°C drift, and same 2kV HBM rating | Offers tighter DC precision for high-accuracy sensor nodes; otherwise pin- and footprint-compatible | Choose LM2902BDR if offset-critical applications (e.g., medical diagnostics) demand sub-2mV performance at temperature extremes |
Compared with LM2902DR and LM2902BDR, LM2902KNSRG4 provides guaranteed operation up to +125°C and matches the B-version's ESD robustness while retaining the proven LM2902 architecture-making it optimal for industrial motor drives and outdoor power electronics where thermal margin and field reliability are non-negotiable.
Availability
LM2902KNSRG4 is available at Aetrix Electronics and suitable for industrial motor control, HVAC system monitoring, and uninterruptible power supplies requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2902KNSRG4 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 heritage in precision op-amps and industrial-grade signal chain solutions.
The LM2902KNSRG4 belongs to TI's industry-standard LMx24 quad op-amp product line, engineered for cost-sensitive, high-reliability applications demanding wide supply range, rail-to-rail input, and robust EMC performance in harsh environments.
FAQ
What is the maximum operating temperature for LM2902KNSRG4?
The LM2902KNSRG4 is specified for operation from –40°C to +125°C ambient temperature. This extended range is validated per TI's characterization and testing protocols and enables reliable use in under-hood automotive subsystems, outdoor HVAC units, and industrial inverters where junction temperatures may exceed +100°C. The device maintains its ±3mV offset voltage and 1.2MHz bandwidth across this full range.
Does LM2902KNSRG4 support true rail-to-rail output swing?
No, LM2902KNSRG4 does not provide rail-to-rail output swing. Its output can swing to within 1.5V of V+ and as low as 5mV above V– (at –40°C to +125°C). While the input stage includes V– in its common-mode range, the output stage is a standard bipolar emitter-follower configuration. For applications requiring full rail-to-rail output, consider TI's TLV2464 or OPA4340 instead.
Is LM2902KNSRG4 pin-compatible with LM2902N?
Yes, LM2902KNSRG4 is pin-compatible with LM2902N. Both are 14-pin SOIC packages with identical pinout (D package), including VCC+, VCC–, four input pairs, and four outputs. The 'K' suffix denotes enhanced manufacturing process and screening, while 'NSR' indicates tape-and-reel packaging and 'G4' denotes RoHS-compliant finish-none affect pin assignment or electrical interface.
Can LM2902KNSRG4 be used in dual-supply configurations?
Yes, LM2902KNSRG4 supports dual-supply operation with VCC+ and VCC– rails. Its absolute maximum ratings allow ±18V (36V total), and its input common-mode range extends to V–, making it suitable for ±15V or ±12V systems. However, the device is optimized for single-supply use; dual-supply designs must ensure both rails remain within 3V–36V total differential and maintain proper decoupling on each supply pin.
What is the capacitive load drive capability of LM2902KNSRG4?
LM2902KNSRG4 is characterized to safely drive up to 100pF capacitive loads without oscillation, per TI's datasheet Section 6.6. This value applies under unity-gain conditions with appropriate layout (short traces, local bypassing). For loads exceeding 100pF-such as long cables or ADC input capacitance-external isolation resistance (e.g., 100Ω in series with output) is recommended to maintain phase margin and prevent peaking.
LM2902KNSRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
LM2902KNSRG4 FAQ
1.How can I place an order for LM2902KNSRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2902KNSRG4 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 LM2902KNSRG4 reliable?
The price and inventory of LM2902KNSRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2902KNSRG4 is usually 5 days.
3.What payment methods are accepted for LM2902KNSRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2902KNSRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2902KNSRG4?
LM2902KNSRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2902KNSRG4 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 LM2902KNSRG4?
For technical support, including LM2902KNSRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2902KNSRG4 requirements.
6.How does Aetrix verify that LM2902KNSRG4 is sourced from the original manufacturer or authorized distributors?
All LM2902KNSRG4 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 LM2902KNSRG4 meets industry standards.
7.What is the process for return or replacement of LM2902KNSRG4?
All LM2902KNSRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM2902KNSRG4, 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 LM2902KNSRG4 part is unused and in its original packaging.
Return procedure for LM2902KNSRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2902KNSRG4 Tags
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LM358DT
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LM358DR
Texas Instruments
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