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Texas Instruments LM2902KDBRG4
- Part No.:
- LM2902KDBRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LM2902KDBRG4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,946
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Product details
Overview
LM2902KDBRG4 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 precision signal conditioning and voltage-level translation IC in industrial power supplies and motor control feedback loops.
For engineers reviewing the LM2902KDBRG4 datasheet, LM2902KDBRG4 pinout, LM2902KDBRG4 application, or LM2902KDBRG4 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 typical in AC inverter gate drive monitoring.
Technical Context
The LM2902KDBRG4 implements a standard voltage-feedback op-amp topology with unity-gain stability, internal frequency compensation, and input stage biasing that enables true single-supply operation down to 3V. Its differential input stage supports input voltages up to the supply rails, and the output stage delivers 1.75V swing from V+ and 20mV from V– at 1mA load across full temperature range.
This device belongs to the B-version family of LM2902, offering improved ESD robustness (2kV HBM), lower input bias current (≤35nA max over –40°C to +125°C), and enhanced PSRR (65–100dB) versus prior generations-making it suitable for noisy industrial environments where supply ripple rejection and input leakage are critical.
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 external regulation. |
| Input Offset Voltage (max) | ±3mV at 25°C - ensures ≤3mV error in precision sensor amplification or reference buffering at room temperature. |
| Gain-Bandwidth Product | 1.2MHz - enables stable closed-loop operation up to ~100kHz with moderate gain (e.g., G=10) in active filters or signal conditioning. |
| Quiescent Current (per amp) | 240µA typical at 5V - allows four-channel analog front-end operation within 1mA total supply budget for low-power embedded controllers. |
| Common-Mode Input Range | V– to (V+) – 2V - permits direct sensing of ground-referenced signals (e.g., shunt current measurement) in single-supply configurations. |
| Output Voltage Swing | 20mV above V– / 1.75V below V+ at 1mA - provides usable dynamic range near supply rails for interfacing with 3.3V or 5V ADCs and comparators. |
| ESD Rating (HBM) | 2kV - meets IEC 61000-4-2 Level 3 requirements for system-level ESD immunity in industrial equipment. |
Pinout & Package
LM2902KDBRG4 is housed in a 14-pin SOIC (D package), 8.65mm × 6mm body size, with exposed pad not present. Pin numbering follows standard top-view orientation with Pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 7, 11 | No Connect (NC) | Internally unconnected; must remain floating or grounded per layout guidelines to avoid parasitic coupling. |
| 2 | Amplifier 1 Output | Drives external load or next-stage input; capable of sourcing/sinking ±30mA short-circuit current. |
| 3 | Amplifier 1 Inverting Input | Accepts feedback network or inverted signal path; high-impedance node (ZIN = 4GΩ || 1.5pF). |
| 4 | Amplifier 1 Non-Inverting Input | Receives reference or sensor signal; common-mode range extends to V– for ground-sense applications. |
| 6 | Positive Supply (VCC+) | Main power rail connection; decoupling capacitor (0.1µF ceramic) required within 5mm for stability. |
| 9 | Amplifier 2 Inverting Input | Second channel negative input; electrically identical to Pin 3 with matched offset and bias characteristics. |
| 10 | Amplifier 2 Output | Independent output stage; no crosstalk degradation beyond 120dB channel separation at 1kHz. |
| 12 | Amplifier 3 Output | Third amplifier output; shares same thermal and supply rejection behavior as Pins 2 and 10. |
| 13 | Amplifier 3 Inverting Input | Third channel inverting input; fully characterized for operation across –40°C to +125°C ambient. |
| 14 | Amplifier 4 Output | Fourth output; validated for capacitive load drive up to 100pF without oscillation. |
| 15 | Amplifier 4 Inverting Input | Final inverting input; matches input bias current spec (≤35nA max) across full temperature range. |
| 16 | Negative Supply / Ground | Reference node for single-supply use; connects to system ground or negative rail in dual-supply configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Enables direct interface with 0V-referenced sensors (e.g., current shunts, thermistors) without level-shifting circuitry. |
| Integrated RF and EMI filter | Reduces susceptibility to 100MHz–1GHz noise in motor drives and switching power supplies, eliminating need for external ferrite beads. |
| Drop-in replacement for LM2902 | Preserves existing PCB layout and bill-of-materials while upgrading offset, ESD, and temperature performance without redesign. |
| Low input bias current (≤35nA) | Minimizes voltage error in high-impedance source applications such as pH probes or photodiode transimpedance stages. |
| Unity-gain stable architecture | Supports direct use in voltage followers, active filters, and precision buffers without external compensation components. |
Applications
| AC Inverter Motor Control | Industrial Power Supply Monitoring |
|---|---|
Use Scenario: Real-time phase current sensing and DC-link voltage scaling in 3-phase VFDs operating at 400–690V bus voltages. IC Role / Device Role / Timing Role: Quad op-amp performs simultaneous current shunt amplification (Ch1–Ch2), DC-bus divider buffering (Ch3), and fault comparator pre-conditioning (Ch4). Use Value: Input rail-to-rail capability eliminates level-shifters; 2kV HBM rating withstands IGBT switching transients; 1.2MHz GBW supports >50kHz current loop bandwidth. | Use Scenario: Multi-rail voltage supervision and regulation feedback in telecom rectifiers and server PSUs with +12V, +5V, and +3.3V outputs. IC Role / Device Role / Timing Role: Configured as precision voltage comparators and error amplifiers for isolated feedback paths and OVP/OCP circuits. Use Value: ±3mV offset ensures <0.5% voltage sense error at 5V; 36V max supply accommodates auxiliary 24V bias rails; 240µA IQ enables always-on monitoring. |
| Smart Appliance Control Board | Automated Test Equipment (ATE) |
Use Scenario: Sensor signal conditioning for temperature, door position, and water flow in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Amplifies RTD bridge outputs, buffers Hall-effect rotor position signals, and conditions pressure transducer outputs. Use Value: –40°C to +125°C rating covers under-hood and laundry drum environments; low IQ extends battery backup runtime; NC pins simplify routing on dense 2-layer boards. | Use Scenario: Programmable gain stages and reference buffers in modular ATE source-measure units requiring multi-channel analog front ends. IC Role / Device Role / Timing Role: Provides four independent, matched-gain amplifiers for simultaneous DUT parameter acquisition (voltage, current, resistance, capacitance). Use Value: Channel-to-channel matching (offset, gain, CMRR) reduces calibration overhead; 120dB crosstalk attenuation prevents inter-channel interference during parallel testing. |
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; non-B version with ±7mV max offset, 500V HBM, and 0°C to 70°C temp range. | Limited to commercial-grade applications; unsuitable for automotive or extended-temperature industrial use. | Select when cost sensitivity outweighs precision, ESD, or temperature requirements. |
| LM2902BDR | B-version with identical specs to LM2902KDBRG4 except RoHS exemption status and tape-and-reel packaging variant. | No functional difference; qualified for same industrial and automotive applications. | Preferred for new designs requiring latest process and reliability enhancements; pin- and footprint-compatible. |
Compared with LM2902DR, LM2902KDBRG4 delivers 2× tighter offset, 4× higher ESD immunity, and full industrial temperature support-while LM2902BDR offers identical electrical performance with updated manufacturing traceability and environmental compliance.
Availability
LM2902KDBRG4 is available at Aetrix Electronics and suitable for industrial motor control, smart appliance subsystems, and automated test equipment requiring stable component supply, long-term lifecycle assurance, and guaranteed RoHS-compliant sourcing.
Supply support for LM2902KDBRG4 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 industrial-grade signal chain solutions.
The LM2902KDBRG4 belongs to TI's high-voltage quad op-amp product line, engineered for robust performance in harsh environments including factory automation, energy infrastructure, and home appliance control systems.
FAQ
What is the maximum operating temperature range for LM2902KDBRG4?
The LM2902KDBRG4 is rated for operation from –40°C to +125°C ambient temperature. This extended range is confirmed in Section 6.3 of the official datasheet and enables reliable deployment in under-hood automotive modules, industrial inverters, and outdoor-rated power electronics where thermal stress exceeds commercial-grade limits. The LM2902KDBRG4 maintains specified offset, gain, and output drive performance across this full range.
Does LM2902KDBRG4 support true single-supply operation with inputs at ground potential?
Yes, the LM2902KDBRG4 supports true single-supply operation with its common-mode input voltage range extending to V– (ground). As specified in Table 6-6, VCM includes V– across all supply voltages from 3V to 36V, enabling direct connection of 0V-referenced sources like current-sense shunts or resistive temperature detectors without external level-shifting circuitry. This feature is validated over the full –40°C to +125°C temperature range.
What is the output drive capability of LM2902KDBRG4 at 12V supply?
At VCC = 12V, the LM2902KDBRG4 delivers a minimum output voltage swing of 100mV above V– and 1.4V below V+ at 1mA load, per Section 6.6 Electrical Characteristics. It can source up to –30mA and sink up to +20mA (short-circuit limited), making it suitable for driving LEDs, small relays, or logic inputs directly. Output impedance remains below 300Ω at 1MHz, ensuring stability with capacitive loads up to 100pF.
Is LM2902KDBRG4 pin-compatible with legacy LM2902 variants?
Yes, LM2902KDBRG4 uses the standard 14-pin SOIC (D) package with identical pinout to LM2902, LM2902K, and LM2902B variants. Pin functions-including NC positions, VCC+, VCC–, and all four amplifier inputs/outputs-are fully aligned per Figure 5-1 and Table 5-1 of the datasheet. No PCB layout changes are required when upgrading from earlier LM2902 versions to LM2902KDBRG4.
What packaging and compliance information applies to LM2902KDBRG4?
LM2902KDBRG4 is supplied in a Pb-free, RoHS-compliant 14-pin SOIC (D) package with green molding compound, per TI's packaging standards. The "G4" suffix denotes TI's industry-standard green, lead-free, halogen-free construction. It meets JEDEC J-STD-020 moisture sensitivity level 3 and is qualified for reflow soldering per IPC/JEDEC J-STD-020. Full compliance documentation is available in TI's official product folder for LM2902KDBRG4.
LM2902KDBRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SSOP (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-SSOP
LM2902KDBRG4 FAQ
1.How can I place an order for LM2902KDBRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2902KDBRG4 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 LM2902KDBRG4 reliable?
The price and inventory of LM2902KDBRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2902KDBRG4 is usually 5 days.
3.What payment methods are accepted for LM2902KDBRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2902KDBRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2902KDBRG4?
LM2902KDBRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2902KDBRG4 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 LM2902KDBRG4?
For technical support, including LM2902KDBRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2902KDBRG4 requirements.
6.How does Aetrix verify that LM2902KDBRG4 is sourced from the original manufacturer or authorized distributors?
All LM2902KDBRG4 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 LM2902KDBRG4 meets industry standards.
7.What is the process for return or replacement of LM2902KDBRG4?
All LM2902KDBRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM2902KDBRG4, 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 LM2902KDBRG4 part is unused and in its original packaging.
Return procedure for LM2902KDBRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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