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Texas Instruments LM2902KDB
- Part No.:
- LM2902KDB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LM2902KDB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:249
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Product details
Overview
LM2902KDB 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, and 240µA per amplifier quiescent current. It serves as a precision signal conditioning and sensor interface IC in power supply feedback loops and motor control circuits.
For engineers reviewing the LM2902KDB datasheet, LM2902KDB pinout, LM2902KDB application, or LM2902KDB 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 single-supply systems where ground-referenced inputs are required.
Technical Context
The LM2902KDB implements four independent high-voltage op amps in a single monolithic silicon die, each featuring unity-gain stability, internal frequency compensation, and rail-to-rail input stage with differential input voltage tolerance up to ±32V. Its architecture supports single-supply operation without level-shifting circuitry.
It delivers 1.2MHz gain-bandwidth product, 0.5V/µs slew rate, and 70–80dB common-mode rejection across –40°C to +125°C, enabling stable closed-loop performance in noisy environments such as AC inverters and industrial motor drives.
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 battery-backed monitoring and always-on subsystems |
| Common-Mode Input Range | V– to (V+) – 2V - allows direct sensing of signals referenced to ground in single-supply configurations |
| Output Swing (from rail) | 100mV above V–, 1.35V below V+ at –50µA - provides usable dynamic range near supply rails for analog-to-digital interfacing |
| Gain-Bandwidth Product | 1.2MHz - supports stable closed-loop gain ≥10 up to ~120kHz for anti-aliasing and active filtering |
| ESD Rating (HBM) | 2kV - meets IEC 61000-4-2 Level 2 for robustness in assembly and field-deployed equipment |
Pinout & Package
LM2902KDB is housed in a 14-pin SOIC (D) package measuring 8.65mm × 6mm, with standard JEDEC MS-012AC footprint and gull-wing leads. Thermal resistance RθJA is 99.3°C/W, supporting operation up to +125°C ambient with minimal heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN– (Pin 2) | Inverting input | Negative input terminal for first amplifier; accepts signals down to V– |
| 1IN+ (Pin 3) | Non-inverting input | Positive input terminal for first amplifier; common-mode range includes V– |
| 1OUT (Pin 1) | Output | Amplified output of first op amp; drives loads ≥10kΩ to maintain specified swing |
| 2IN– (Pin 6) | Inverting input | Negative input terminal for second amplifier; electrically isolated from other channels |
| 2IN+ (Pin 5) | Non-inverting input | Positive input terminal for second amplifier; shares same VCM spec as Pin 2/3 |
| 2OUT (Pin 7) | Output | Amplified output of second op amp; capable of sourcing/sinking ±20mA short-circuit current |
| 3IN– (Pin 9) | Inverting input | Negative input terminal for third amplifier; identical electrical specs to Pins 2 and 6 |
| 3IN+ (Pin 10) | Non-inverting input | Positive input terminal for third amplifier; supports differential input up to ±32V |
| 3OUT (Pin 8) | Output | Amplified output of third op amp; internally compensated for unity-gain stability |
| 4IN– (Pin 13) | Inverting input | Negative input terminal for fourth amplifier; matches all channel-to-channel specifications |
| 4IN+ (Pin 12) | Non-inverting input | Positive input terminal for fourth amplifier; validated for operation across full temperature range |
| 4OUT (Pin 14) | Output | Amplified output of fourth op amp; maintains 120dB channel separation at 1–20kHz |
| VCC+ (Pin 4) | Positive supply | Main positive supply rail; must be ≥3V and ≤36V relative to VCC– |
| VCC– (Pin 11) | Negative supply / Ground | Reference node for single-supply operation; tied to system ground in most implementations |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input (V– included) | Enables direct interface with ground-referenced sensors and transducers without external bias networks |
| Integrated EMI/RF filter | Reduces susceptibility to conducted and radiated noise in industrial motor drive and power supply environments |
| High ESD rating (2kV HBM) | Supports handling and assembly in standard manufacturing lines without special ESD controls beyond Class 1B |
| Low input bias current (≤35nA) | Minimizes voltage error in high-impedance source applications such as thermistor and photodiode interfaces |
| Unity-gain stable | Eliminates need for external compensation components in buffer, follower, and gain-of-one configurations |
Applications
| Power Supply Feedback Loop | Motor Control Current Sensing |
|---|---|
Use Scenario: Monitoring output voltage in 24V switching power supplies for server PSUs and telecom rectifiers. IC Role / Device Role / Timing Role: Error amplifier in voltage feedback path, comparing sensed output to precision reference. Use Value: ±3mV offset ensures <0.1% regulation error at 24V; rail-to-rail input accommodates ground-referenced divider networks. | Use Scenario: Amplifying shunt resistor voltage in three-phase inverter gate drivers for HVAC compressors. IC Role / Device Role / Timing Role: Low-side current sense amplifier feeding ADC input of motor control MCU. Use Value: 240µA quiescent current minimizes self-heating drift; 120dB channel separation prevents crosstalk between phases. |
| Industrial Temperature Monitoring | Multi-function Printer Sensor Interface |
Use Scenario: Conditioning RTD or thermistor signals in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with programmable gain and offset calibration. Use Value: –40°C to +125°C operating range matches industrial ambient specs; ±3mV offset simplifies factory calibration. | Use Scenario: Signal conditioning for paper jam, toner level, and fuser temperature sensors in office MFPs. IC Role / Device Role / Timing Role: General-purpose analog signal conditioner for multiple low-bandwidth DC sensors. Use Value: SOIC-14 package enables compact layout; 1.2MHz GBW supports fast settling during sensor polling 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 SOIC-14 package, identical electrical specs, but rated for 0°C to +70°C ambient instead of –40°C to +125°C | Suitable only for commercial-grade equipment; not qualified for automotive or industrial temperature extremes | Select LM2902KDB when operation beyond 70°C ambient is required, especially in enclosed enclosures or outdoor deployments |
| LM2902BDR | B-version with improved 2kV HBM ESD rating, ±2mV offset (BA variant), and enhanced EMI filtering vs. KDB's standard B-spec | Offers tighter offset and higher noise immunity; requires validation if legacy design used non-B variants | Choose LM2902BDR for new designs demanding highest precision and ruggedness; LM2902KDB remains optimal for cost-sensitive drop-in replacements |
Compared with LM2902DR and LM2902BDR, the LM2902KDB provides the best balance of extended temperature capability, proven reliability in industrial power systems, and direct compatibility with legacy LM2902 footprints-without requiring PCB redesign or recalibration.
Availability
LM2902KDB is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies, and HVAC control systems requiring stable component supply across long production lifecycles and seasonal demand spikes.
Supply support for LM2902KDB 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 and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM2902 product line delivers cost-optimized, high-voltage quad op amps engineered for robust performance in power conversion, sensor signal conditioning, and control loop applications across harsh thermal and electromagnetic environments.
FAQ
What is the maximum operating temperature range for the LM2902KDB?
The LM2902KDB is specified for operation from –40°C to +125°C ambient temperature. This extended range is confirmed in Section 6.3 of the official TI datasheet (SLOS066AE) and enables reliable use in sealed industrial enclosures, automotive under-hood modules, and outdoor power electronics where thermal management is constrained.
Does the LM2902KDB support true rail-to-rail output swing?
No, the LM2902KDB does not provide rail-to-rail output swing. Its output swings to within 100mV of VCC– and 1.35V of VCC+ under light load (–50µA). This limitation is documented in Section 6.6 Electrical Characteristics for LM2902B and LM2902BA. For applications requiring full rail-to-rail output, consider the TLV2464 or OPA4340 families.
Can the LM2902KDB replace older LM2902 variants on existing PCBs?
Yes, the LM2902KDB is a direct drop-in replacement for legacy LM2902, LM2902K, and LM2902KV devices in SOIC-14 packages. Pinout, footprint, and basic electrical specs match exactly; it also improves upon them with higher ESD rating (2kV HBM), wider temperature range, and integrated EMI filtering per TI's official drop-in claim in Section 1 Features.
What is the typical quiescent current per amplifier in the LM2902KDB?
The LM2902KDB draws 240µA per amplifier at 5V supply and 25°C, rising to 300µA maximum across –40°C to +125°C. This value is specified in Section 6.6 under "IQ Quiescent current per amplifier" and enables low-power operation in always-on monitoring circuits without compromising bandwidth or output drive.
Is the LM2902KDB unity-gain stable?
Yes, the LM2902KDB is internally compensated for unity-gain stability. Section 8.3 Feature Description confirms this, and Section 6.6 lists phase margin of 56° at G = +1 with 10kΩ load and 20pF capacitance-well above the 45° minimum for stable operation. No external compensation is required for gain ≥1 configurations.
LM2902KDB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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-SSOP
LM2902KDB FAQ
1.How can I place an order for LM2902KDB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2902KDB 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 LM2902KDB reliable?
The price and inventory of LM2902KDB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2902KDB is usually 5 days.
3.What payment methods are accepted for LM2902KDB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2902KDB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2902KDB?
LM2902KDB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2902KDB 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 LM2902KDB?
For technical support, including LM2902KDB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2902KDB requirements.
6.How does Aetrix verify that LM2902KDB is sourced from the original manufacturer or authorized distributors?
All LM2902KDB 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 LM2902KDB meets industry standards.
7.What is the process for return or replacement of LM2902KDB?
All LM2902KDB units undergo pre-shipment inspection (PSI). If there is an issue with LM2902KDB, 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 LM2902KDB part is unused and in its original packaging.
Return procedure for LM2902KDB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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