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Texas Instruments LM2902DBR
- Part No.:
- LM2902DBR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LM2902DBR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:112,000
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Product details
Overview
LM2902DBR from Texas Instruments is a quad operational amplifier optimized for single-supply operation across –40°C to 125°C, featuring rail-to-rail input (including ground), 3 mV typical input offset voltage, 0.8 mA typical supply current per amplifier, and 26 V maximum supply voltage. It serves as a general-purpose signal conditioning front-end in automotive sensor interfaces, industrial analog I/O modules, and battery-powered instrumentation.
For engineers reviewing the LM2902DBR datasheet, LM2902DBR pinout, LM2902DBR application, or LM2902DBR equivalent, key selection criteria include guaranteed operation down to –40°C, input common-mode range extending to ground, low quiescent current under 3 V–26 V supply, and compatibility with standard SOIC-14 (DB) packaging for legacy board reuse.
Technical Context
The LM2902DBR implements four independent, internally frequency-compensated op-amps using bipolar transistor technology. Each amplifier features a high-gain, direct-coupled architecture with input stage biasing that enables true ground-sensing capability - no external level-shifting required when interfacing with 0 V referenced transducers.
Its differential input voltage rating of ±26 V and output short-circuit robustness support reliable operation in noisy industrial environments. The device lacks rail-to-rail output swing but delivers ≥22 V high-level output into 2 kΩ at VCC = 26 V, making it suitable for driving comparators or ADC reference buffers without additional gain stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 26 V single supply - supports direct interface with 3.3 V and 5 V microcontrollers without level shifters |
| Input Offset Voltage (Typ) | 3 mV at 25°C - enables accurate DC amplification of millivolt-level sensor outputs (e.g., thermocouples, strain gauges) |
| Supply Current (Typ) | 0.8 mA per amplifier - allows four-channel analog front-end operation within 3.2 mA total, critical for low-power systems |
| Input Common-Mode Range | 0 V to VCC–1.5 V - permits direct connection of grounded sensors (e.g., RTDs, current shunts) without negative supply |
| Large-Signal Voltage Gain | 100 V/mV typical - provides ≥80 dB open-loop gain for stable closed-loop configurations up to unity gain |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive, motor control, and industrial PLC applications |
| Output Short-Circuit Current | ±40 mA typical - withstands accidental shorts during prototyping or field wiring faults without latch-up |
Pinout & Package
LM2902DBR is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package with 3.9 mm body width and 1.27 mm lead pitch, compatible with standard surface-mount reflow profiles and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Channel 1 Output | Amplifier A output - drives downstream circuitry; limited to VCC–1.5 V max swing |
| 2 | Channel 1 Inverting Input | Inverting node for Amp A - accepts feedback networks and summing junctions |
| 3 | Channel 1 Non-Inverting Input | Non-inverting node for Amp A - connects to sensor or reference voltage |
| 4 | Ground (GND) | Common return for all four amplifiers - must be low-impedance path to avoid crosstalk |
| 5 | Channel 2 Non-Inverting Input | Non-inverting node for Amp B - isolated from other channels except via shared GND/VCC |
| 6 | Channel 2 Inverting Input | Inverting node for Amp B - used for precision gain-setting or comparator hysteresis |
| 7 | Channel 2 Output | Amplifier B output - electrically identical to Pin 1; shares same VCC/GND rails |
| 8 | VCC Supply | Positive supply for all four amplifiers - bypass capacitor (0.1 µF) required near this pin |
| 9 | Channel 3 Non-Inverting Input | Non-inverting node for Amp C - supports multi-channel signal conditioning on one IC |
| 10 | Channel 3 Inverting Input | Inverting node for Amp C - enables independent gain configuration per channel |
| 11 | Channel 3 Output | Amplifier C output - usable for auxiliary functions like reference buffering or bias generation |
| 12 | Channel 4 Non-Inverting Input | Non-inverting node for Amp D - allows fourth independent analog path without extra components |
| 13 | Channel 4 Inverting Input | Inverting node for Amp D - supports active filtering or differential-to-single-ended conversion |
| 14 | Channel 4 Output | Amplifier D output - completes quad functionality; all outputs share same drive strength specs |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation from 3 V | Eliminates need for dual ±15 V supplies in legacy industrial designs, reducing BOM count and PCB area |
| Input common-mode range includes ground | Enables direct connection of 0 V-referenced sensors (e.g., thermistors, pressure bridges) without external bias resistors |
| Low input bias current (20 nA typ) | Minimizes voltage error across high-impedance sources such as pH electrodes or photodiode transimpedance feedback paths |
| Internal frequency compensation | Guarantees stability with unity-gain feedback; no external compensation capacitor required for basic configurations |
| Wide temperature range (–40°C to 125°C) | Validates performance in automotive engine control units and industrial motor drives without derating |
Applications
| Automotive Cabin Temperature Sensing | Industrial 4–20 mA Loop Receiver |
|---|---|
|
Use Scenario: Amplifying low-level output from NTC thermistors mounted in HVAC ducts, exposed to ambient temperatures from –40°C to 85°C. IC Role / Device Role / Timing Role: Precision DC amplifier conditioning thermistor voltage drop across a fixed bias resistor. Use Value: LM2902DBR's ground-sensing input eliminates need for negative supply or level-shifting circuitry, simplifying layout and improving long-term drift stability. |
Use Scenario: Converting 4–20 mA current loop signals from remote pressure/flow sensors into 0–5 V analog inputs for PLC ADCs. IC Role / Device Role / Timing Role: Transimpedance amplifier with precision gain-setting resistors and output buffer stage. Use Value: LM2902DBR's 3 mV offset and 0.8 mA supply current enable accurate 12-bit+ measurement while minimizing self-heating errors in sealed enclosures. |
| Battery-Powered Data Logger Front-End | Motor Phase Current Monitoring |
|
Use Scenario: Signal conditioning for multiple analog sensors (voltage, temperature, humidity) in portable environmental monitors powered by Li-ion cells (3.0–4.2 V). IC Role / Device Role / Timing Role: Quad-channel DC-coupled amplifier providing simultaneous gain/level-shift for each sensor path. Use Value: LM2902DBR's 3 V minimum supply and 0.8 mA per amplifier allow full quad operation within 3.2 mA, extending battery life beyond 12 months. |
Use Scenario: Isolated current sensing of three-phase inverter legs in BLDC motor drives, where shunt voltages range from –100 mV to +100 mV referenced to power ground. IC Role / Device Role / Timing Role: High-side current sense amplifier with bidirectional output swing and fast settling for PWM synchronization. Use Value: LM2902DBR's ±26 V differential input rating and –40°C to 125°C qualification ensure reliable operation despite switching noise and thermal cycling. |
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 electrical specs and temperature range; packaged in SOIC-14 tape-and-reel (R suffix) instead of DB variant | No functional difference - identical pinout and performance; differs only in packaging format and reel orientation | Select LM2902DR for automated SMT assembly requiring tape-and-reel delivery; LM2902DBR is functionally identical but may differ in reel specification |
| TLV2464IDR | Rail-to-rail input/output, 0.55 mA supply current, 6 MHz GBW, but rated only to 125°C (not –40°C) | Superior AC performance and lower power, but not qualified for automotive cold-start conditions below 0°C | Choose TLV2464IDR only if rail-to-rail output swing and higher bandwidth are required, and operating temperature stays above 0°C |
Compared with LM2902DR, LM2902DBR offers identical functionality in the same SOIC-14 footprint but with distinct reel packaging; compared with TLV2464IDR, LM2902DBR trades bandwidth and rail-to-rail output for guaranteed –40°C startup and proven robustness in high-noise motor control environments.
Availability
LM2902DBR is available at Aetrix Electronics and suitable for automotive cabin electronics, industrial process controllers, and battery-powered data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2902DBR 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and digital signal technologies for industrial, automotive, and consumer markets.
The LM2902DBR belongs to TI's legacy precision op-amp product line, designed specifically for cost-sensitive, high-reliability analog signal conditioning in single-supply systems where ground-referenced inputs and wide temperature operation are mandatory.
FAQ
What is the maximum supply voltage for LM2902DBR?
The absolute maximum supply voltage for LM2902DBR is 26 V. This is lower than the 30 V limit for LM324-family variants due to internal process and thermal design constraints. Operation above 26 V risks permanent damage, even briefly. For designs requiring >26 V rails, consider the LM324D or consult TI's high-voltage op-amp portfolio.
Does LM2902DBR support rail-to-rail output swing?
No, LM2902DBR does not provide rail-to-rail output swing. Its high-level output is typically VCC–1.5 V into 2 kΩ, and low-level output is ≤20 mV above ground. This limitation is inherent to its bipolar output stage. If full rail-to-rail output is required, TI's TLV2464 or OPA4340 series offer alternatives - but with different temperature and offset specifications.
Can LM2902DBR operate from a 3.3 V supply?
Yes, LM2902DBR is fully specified to operate from 3 V to 26 V single supply. At 3.3 V, it maintains guaranteed input common-mode range down to ground and output swing from ~20 mV to ~1.8 V (VCC–1.5 V), enabling use with 3.3 V microcontrollers and ADCs. Performance parameters like gain and CMRR are characterized across this full range.
What is the input offset voltage specification for LM2902DBR over temperature?
The input offset voltage for LM2902DBR is 3 mV typical at 25°C and increases to 10 mV maximum across the full –40°C to 125°C range. This drift is documented in the "electrical characteristics" table under "Full range" conditions. For applications demanding tighter DC accuracy, consider the LM2902A variant (2 mV max at 25°C) or auto-zero op-amps like the OPA2333.
Is LM2902DBR pin-compatible with LM324N?
Yes, LM2902DBR is pin-compatible with LM324N in terms of terminal assignment and function - both use the same 14-pin SOIC (DB) and PDIP (N) footprints respectively. However, LM2902DBR extends the temperature range to –40°C to 125°C versus LM324N's 0°C to 70°C, and has a lower maximum supply voltage (26 V vs 30 V). Electrical behavior is otherwise identical.
LM2902DBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SSOP (0.209", 5.30mm 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SSOP
LM2902DBR FAQ
1.How can I place an order for LM2902DBR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2902DBR 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 LM2902DBR reliable?
The price and inventory of LM2902DBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2902DBR is usually 5 days.
3.What payment methods are accepted for LM2902DBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2902DBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2902DBR?
LM2902DBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2902DBR 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 LM2902DBR?
For technical support, including LM2902DBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2902DBR requirements.
6.How does Aetrix verify that LM2902DBR is sourced from the original manufacturer or authorized distributors?
All LM2902DBR 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 LM2902DBR meets industry standards.
7.What is the process for return or replacement of LM2902DBR?
All LM2902DBR units undergo pre-shipment inspection (PSI). If there is an issue with LM2902DBR, 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 LM2902DBR part is unused and in its original packaging.
Return procedure for LM2902DBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2902DBR Tags
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