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Texas Instruments LM2902KD
- Part No.:
- LM2902KD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2902KD.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,923
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Product details
Overview
LM2902KD from Texas Instruments is a quad operational amplifier in SOIC-14 package, designed for cost-sensitive industrial and consumer applications requiring rail-to-rail input (V– included), 3V to 36V supply operation, ±3mV max input offset voltage at 25°C, and 1.2MHz gain-bandwidth product. It serves as a precision signal conditioning and voltage comparison IC in power supply feedback loops and sensor interface circuits.
For engineers reviewing the LM2902KD datasheet, LM2902KD pinout, LM2902KD application, or LM2902KD equivalent, this page delivers verified electrical specs, validated pin functions, real-world use cases in AC inverters and UPS systems, and two confirmed alternative parts with documented functional differences.
Technical Context
The LM2902KD implements four independent high-voltage op-amps with unity-gain stability, common-mode input range extending to V–, and output swing within 1.5V of V+ and 100mV of V– at light load. Its internal architecture includes integrated RF/EMI filtering and ESD protection rated at 2kV HBM.
It operates across –40°C to +125°C ambient temperature, supports single-supply configurations, and maintains 240µA typical quiescent current per amplifier-enabling low-power system monitoring without sacrificing bandwidth or DC accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - enables direct use in 5V, 12V, 24V, and 32V industrial rails without regulation |
| Input Offset Voltage (max) | ±3mV at 25°C - ensures ≤3mV error in precision DC amplification and comparator thresholds |
| Gain-Bandwidth Product | 1.2MHz - supports stable closed-loop operation up to ~100kHz with moderate gain |
| Quiescent Current (per amp) | 240µA typical - allows four-channel analog front-end operation under 1mA total supply current |
| Common-Mode Input Range | V– to (V+) – 1.5V - permits ground-referenced sensing and single-supply transducer interfacing |
| Output Swing (min) | 100mV above V–, 1.35V below V+ at –50µA - delivers usable dynamic range near supply rails |
| ESD Rating (HBM) | 2kV - meets IEC 61000-4-2 Level 2 for robustness in manufacturing and field environments |
Pinout & Package
LM2902KD is housed in a 14-pin SOIC (D) package measuring 8.65mm × 6mm, with standard JEDEC outline and surface-mount compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN– | Inverting input (Amp 1) | Negative feedback node for first amplifier; accepts signals down to V– |
| 1IN+ | Non-inverting input (Amp 1) | Reference or sensor input; common-mode range includes V– |
| 1OUT | Output (Amp 1) | Drives loads ≥10kΩ; swings within 1.5V of V+ and 100mV of V– |
| VCC+ | Positive supply | Connects to highest potential rail (3V–36V); decoupling recommended |
| VCC– | Negative supply / ground | Connects to lowest potential (often GND in single-supply configs) |
| 4OUT | Output (Amp 4) | Independent output channel; identical drive capability to 1OUT |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in replacement for LM2902 | Pin-compatible upgrade with improved offset, ESD, and EMI rejection over legacy LM2902 |
| Rail-to-rail input (V– included) | Enables direct interfacing with grounded sensors and 0V-referenced signals without level-shifting |
| Integrated RF/EMI filter | Reduces susceptibility to noise from switching power supplies and motor drives in industrial settings |
| Low quiescent current (240µA/amp) | Supports always-on monitoring in battery-backed or energy-constrained subsystems |
| Wide operating temperature (–40°C to +125°C) | Validated for under-hood automotive auxiliary circuits and outdoor HVAC control boards |
Applications
| Power Supply Feedback Loop | AC Inverter Voltage Sensing |
|---|---|
Use Scenario: Monitoring output voltage in 24V/48V offline SMPS for closed-loop regulation. IC Role / Device Role / Timing Role: Quad op-amp configured as error amplifier and reference buffer in isolated feedback path. Use Value: ±3mV offset ensures <0.1% voltage regulation error; rail-to-rail input accommodates optocoupler-referenced signals. | Use Scenario: Scaling and conditioning DC-link voltage in 3-phase solar string inverters. IC Role / Device Role / Timing Role: Precision resistor-divider interface and level-shifted signal conditioning before ADC input. Use Value: 1.2MHz GBW supports fast transient response during grid fault events; 2kV HBM withstands inverter EMI. |
| Uninterruptible Power Supply (UPS) | Refrigeration Compressor Control |
Use Scenario: Battery voltage monitoring and charge-state estimation in line-interactive UPS units. IC Role / Device Role / Timing Role: Four-channel analog monitor for battery pack segments, temperature, and AC input status. Use Value: 240µA/amp quiescent current extends backup runtime; –40°C to +125°C rating covers wide ambient storage conditions. | Use Scenario: Motor phase current sensing and overcurrent protection in variable-speed compressor drivers. IC Role / Device Role / Timing Role: Low-side shunt amplifier and comparator for real-time current limiting. Use Value: Output swing within 100mV of V– enables accurate 0V-referenced current measurement; EMI filtering suppresses PWM noise coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2902BDR | Same SOIC-14 package; ±2mV max offset (BA version), 240µA IQ, identical pinout and spec table | Targeted for higher-precision designs where <2mV offset is required at full temperature range | Select LM2902BDR when tighter DC accuracy is needed; otherwise LM2902KD offers optimal cost/performance balance |
| LM2902PW | TSSOP-14 package (5mm × 6.4mm); same electrical specs but smaller footprint and thermal resistance (RθJA = 124.7°C/W) | Suitable for space-constrained PCBs where SOIC-14 layout area is unavailable | Choose LM2902PW only if board space is critical; verify thermal margin given higher junction-to-ambient resistance |
Compared with LM2902BDR and LM2902PW, the LM2902KD provides the industry-standard SOIC-14 mechanical fit, proven manufacturability, and balanced performance for general-purpose industrial signal conditioning-without requiring layout changes or precision calibration overhead.
Availability
LM2902KD is available at Aetrix Electronics and suitable for uninterruptible power supplies, AC inverters, and refrigeration control systems requiring stable component supply across extended production lifecycles.
Supply support for LM2902KD 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability and long-term support.
The LM2902 family was engineered for cost-sensitive industrial and consumer applications demanding robust performance, wide supply range, and drop-in compatibility with legacy designs.
FAQ
What is the maximum supply voltage for LM2902KD?
The absolute maximum supply voltage for LM2902KD is 40V, but the recommended operating range is 3V to 36V. Operation at 36V is fully characterized across –40°C to +125°C, supporting high-voltage industrial rails while maintaining 240µA typical quiescent current per amplifier. Exceeding 36V risks parametric degradation and reduced reliability.
Does LM2902KD support single-supply operation?
Yes, LM2902KD supports true single-supply operation. Its common-mode input range includes V– (typically ground), and its output swings within 100mV of V– and 1.35V of V+ at light load. This allows direct interfacing with grounded sensors and unipolar signal chains without external level-shifting circuitry-making it ideal for 5V or 12V microcontroller-based systems.
What is the input offset voltage specification for LM2902KD?
The LM2902KD has a maximum input offset voltage of ±3mV at 25°C and ±4mV over the full –40°C to +125°C operating range. This value is specified per amplifier and applies to all four channels. The typical offset is ±0.6mV, enabling high-accuracy DC-coupled amplification in applications like battery voltage monitoring and precision current sensing.
Is LM2902KD pin-compatible with older LM2902 variants?
Yes, LM2902KD is a drop-in replacement for all standard LM2902 versions in SOIC-14 (D) package. It retains identical pinout, footprint, and basic electrical behavior while improving key parameters: lower offset (±3mV vs. ±7mV), higher ESD rating (2kV HBM vs. 500V), and integrated EMI filtering. No PCB or schematic changes are required for migration.
What thermal considerations apply to LM2902KD in SOIC-14 package?
LM2902KD in SOIC-14 has a junction-to-ambient thermal resistance (RθJA) of 99.3°C/W. At maximum 36V supply and full output loading, power dissipation must be limited to maintain TJ < 150°C. For continuous operation at 85°C ambient, derating is required above ~350mW total package power. Use of copper pour under the exposed pad (if present) or thermal vias improves heat transfer in high-density layouts.
LM2902KD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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-SOIC
LM2902KD FAQ
1.How can I place an order for LM2902KD through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2902KD 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 LM2902KD reliable?
The price and inventory of LM2902KD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2902KD is usually 5 days.
3.What payment methods are accepted for LM2902KD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2902KD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2902KD?
LM2902KD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2902KD 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 LM2902KD?
For technical support, including LM2902KD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2902KD requirements.
6.How does Aetrix verify that LM2902KD is sourced from the original manufacturer or authorized distributors?
All LM2902KD 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 LM2902KD meets industry standards.
7.What is the process for return or replacement of LM2902KD?
All LM2902KD units undergo pre-shipment inspection (PSI). If there is an issue with LM2902KD, 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 LM2902KD part is unused and in its original packaging.
Return procedure for LM2902KD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2902KD Tags
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LM358DT
STMicroelectronics
-
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
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MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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