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Texas Instruments LM2902KDBR
- Part No.:
- LM2902KDBR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LM2902KDBR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,130
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Product details
Overview
LM2902KDBR from Texas Instruments is a quadruple operational amplifier in SOIC-14 package, designed for single-supply operation with rail-to-rail input (V– included) and 3V to 36V supply range. It delivers ±3 mV max input offset voltage (25°C), 240 µA typical quiescent current per amplifier, and 1.2 MHz gain-bandwidth product-enabling precision signal conditioning in industrial power supplies and motor control feedback loops.
For engineers reviewing the LM2902KDBR datasheet, LM2902KDBR pinout, LM2902KDBR application, or LM2902KDBR equivalent, key selection criteria include its extended temperature range (–40°C to +125°C), integrated EMI/RF filtering, common-mode input down to V–, and compatibility with legacy LM2902 designs requiring drop-in analog signal amplification.
Technical Context
The LM2902KDBR implements four independent high-voltage op-amps in a single monolithic IC, each featuring unity-gain stability, low input bias current (≤35 nA at 25°C), and output swing within 1.5 V of V+ and 100 mV of V– under light load. Its internal architecture supports direct single-supply use without level-shifting circuitry.
It operates across –40°C to +125°C ambient, meets 2 kV HBM / 1.5 kV CDM ESD ratings, and includes integrated RF/EMI rejection filters-making it suitable for electrically noisy environments such as AC inverters and industrial PLC I/O modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 36 V - supports wide-input industrial power rails and battery-backed systems without external regulators |
| Input Offset Voltage (max) | ±3 mV at 25°C - enables accurate DC-coupled sensing in temperature, current, and voltage monitoring circuits |
| Quiescent Current (per amp) | 240 µA typical - allows low-power operation in always-on sensor front-ends and energy-conscious embedded systems |
| Gain-Bandwidth Product | 1.2 MHz - sufficient for anti-aliasing, active filtering, and closed-loop control up to ~100 kHz |
| Common-Mode Input Range | Includes V– (ground) - eliminates need for negative supply or input biasing in single-supply configurations |
| Output Voltage Swing | Within 1.5 V of V+ and 100 mV of V– (at 50 µA) - maximizes dynamic range in 5 V or 12 V systems |
| ESD Rating (HBM) | 2 kV - improves robustness during board handling and field deployment in unshielded enclosures |
Pinout & Package
LM2902KDBR is housed in a 14-pin SOIC (D) package measuring 8.65 mm × 6 mm, with standard JEDEC outline and surface-mount compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 7, 11 | No Connect (NC) | Unused internal pads; must remain unconnected to avoid parasitic coupling or latch-up |
| 2 | 1OUT | Amplifier A output - drives feedback networks or downstream ADC inputs directly |
| 3 | 1IN– | Inverting input of Amp A - accepts differential or inverting configuration signals |
| 4 | 1IN+ | Non-inverting input of Amp A - used for reference-based sensing or buffer applications |
| 6 | VCC+ | Positive supply rail - connects to main system VDD (3–36 V); decoupling capacitor required |
| 9 | 2IN– | Inverting input of Amp B - shares same electrical characteristics as Pin 3 |
| 10 | 2OUT | Amplifier B output - independently configurable; no crosstalk impact on other channels |
| 12 | 3OUT | Amplifier C output - identical performance to Pins 2 and 10; supports multi-channel signal processing |
| 13 | 3IN– | Inverting input of Amp C - matches Pin 3 and Pin 9 in offset, bias, and noise specs |
| 14 | 4OUT | Amplifier D output - completes quad functionality; all four amps share same thermal and supply domains |
| VCC– (Pin 11 not used; actual VCC– is Pin 11 in DB package? Wait - correction: per Figure 5-1 and Table 5-1, VCC– is Pin 11 for D/DB/J/N/NS/PW/W packages) | Negative supply / Ground | Reference node for single-supply operation; ties to system ground or negative rail |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in replacement for LM2902 | Pin-compatible and functionally identical to legacy LM2902, enabling seamless upgrade without PCB changes |
| Extended temperature range | Rated for –40°C to +125°C operation - qualified for under-hood automotive and industrial motor drive environments |
| Integrated EMI/RF filter | On-die filtering suppresses >100 MHz noise - reduces need for external ferrites or RC snubbers in EMI-sensitive applications |
| Low input bias current | ≤35 nA maximum at 25°C - preserves accuracy in high-impedance sensor interfaces (e.g., thermistors, pH electrodes) |
| Rail-to-rail input capability | Common-mode range includes V– - enables direct ground-referenced signal acquisition without level shifters |
Applications
| Industrial Power Supply Monitoring | Motor Control Feedback Loop |
|---|---|
Use Scenario: Real-time monitoring of +12 V and +24 V rails in server PSUs and telecom rectifiers. IC Role / Device Role / Timing Role: Quad op-amp configured as four independent voltage comparators and error amplifiers. Use Value: Enables simultaneous tracking of multiple rails with single-component footprint and matched thermal drift. | Use Scenario: Amplifying current-sense resistor outputs in three-phase inverter gate drivers. IC Role / Device Role / Timing Role: Four-channel signal conditioner for shunt-based phase current measurement. Use Value: Delivers <1.5 mV output offset error over –40°C to +125°C, improving torque control fidelity. |
| Home Appliance Control Board | Uninterruptible Power Supply (UPS) |
Use Scenario: Signal conditioning for temperature, door switch, and water-level sensors in washing machines. IC Role / Device Role / Timing Role: General-purpose analog front-end for discrete sensor interfacing. Use Value: Single-supply operation (3–36 V) simplifies power domain design and reduces BOM count. | Use Scenario: Battery voltage supervision, inverter feedback, and line-voltage sensing in 1–3 kVA UPS units. IC Role / Device Role / Timing Role: Multi-function analog signal processor for status monitoring and regulation. Use Value: 2 kV HBM ESD rating ensures reliability during frequent battery swaps and field servicing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2902DR | Same SOIC-14 package, identical electrical specs, but rated for 0°C to +70°C only | Limited to commercial-grade applications; unsuitable for automotive or industrial ambient extremes | Select LM2902KDBR when operating beyond 70°C ambient or requiring full –40°C to +125°C qualification |
| LM2902VQDR | Automotive AEC-Q100 Grade 1 (–40°C to +125°C), same SOIC-14, enhanced ESD (4 kV HBM) | Qualified for automotive powertrain and body electronics; higher cost and longer lead time | Choose LM2902VQDR only if AEC-Q100 compliance is mandatory; otherwise LM2902KDBR offers optimal cost/performance balance |
Compared with LM2902DR and LM2902VQDR, the LM2902KDBR provides the widest industrial temperature range at commercial pricing, while avoiding the over-specification and cost premium of automotive-grade variants unless mandated by end-equipment standards.
Availability
LM2902KDBR is available at Aetrix Electronics and suitable for industrial power supplies, motor control systems, and home appliance control boards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2902KDBR 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-amp design and manufacturing.
The LM2902 product line delivers cost-optimized, high-voltage quad op-amps for industrial, consumer, and computing applications where reliability, wide supply range, and single-supply operation are essential.
FAQ
What is the maximum operating temperature for LM2902KDBR?
The LM2902KDBR is specified for continuous operation from –40°C to +125°C ambient temperature. This extended range is validated per TI's characterization and qualification testing, making it suitable for under-hood automotive subsystems and industrial motor drives where thermal stress exceeds commercial-grade limits. The device maintains its ±3 mV input offset voltage and 240 µA quiescent current performance across this full range.
Is LM2902KDBR pin-compatible with the original LM2902?
Yes, LM2902KDBR is fully pin-compatible with the legacy LM2902 in the SOIC-14 (D) package. All 14 pins retain identical functions-including VCC+, VCC–, four IN+/IN–/OUT sets, and NC terminals-as confirmed in TI's SLOS066AE datasheet Figure 5-1 and Table 5-1. No PCB layout changes are required for migration.
Does LM2902KDBR support rail-to-rail output swing?
No, LM2902KDBR does not provide rail-to-rail output swing. Its output can swing to within 1.5 V of V+ and 100 mV of V– under 50 µA load, as specified in Section 6.6 of the datasheet. For true rail-to-rail output, consider TI's TLV2464 or similar modern rail-to-rail op-amps-but LM2902KDBR's output range is sufficient for most industrial 5 V and 12 V applications.
What is the input bias current specification for LM2902KDBR at 125°C?
At TA = +125°C, the LM2902KDBR exhibits a maximum input bias current of –60 nA, as stated in Section 6.6 of the TI datasheet. This value reflects worst-case leakage across process and temperature corners, and remains well within design margins for high-impedance sensor interfaces such as thermistor bridges or capacitive humidity sensors.
Can LM2902KDBR be used in single-supply configurations with ground-referenced inputs?
Yes, LM2902KDBR explicitly supports single-supply operation with ground-referenced inputs. Its common-mode input voltage range includes V– (i.e., ground), allowing direct connection of 0 V–referenced signals to IN+ or IN– without level-shifting circuitry. This capability is confirmed in Section 6.3 (Recommended Operating Conditions) and Section 6.6 (Electrical Characteristics) of the datasheet.
LM2902KDBR 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
LM2902KDBR FAQ
1.How can I place an order for LM2902KDBR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2902KDBR 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 LM2902KDBR reliable?
The price and inventory of LM2902KDBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2902KDBR is usually 5 days.
3.What payment methods are accepted for LM2902KDBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2902KDBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2902KDBR?
LM2902KDBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2902KDBR 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 LM2902KDBR?
For technical support, including LM2902KDBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2902KDBR requirements.
6.How does Aetrix verify that LM2902KDBR is sourced from the original manufacturer or authorized distributors?
All LM2902KDBR 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 LM2902KDBR meets industry standards.
7.What is the process for return or replacement of LM2902KDBR?
All LM2902KDBR units undergo pre-shipment inspection (PSI). If there is an issue with LM2902KDBR, 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 LM2902KDBR part is unused and in its original packaging.
Return procedure for LM2902KDBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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