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STMicroelectronics LM2902WDT
- Part No.:
- LM2902WDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2902WDT.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:29,938
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Product details
Overview
LM2902WDT from STMicroelectronics is a low-power quad operational amplifier in SO-14 package, designed for single-supply operation from 3 V to 30 V or dual supplies (±1.5 V to ±15 V), featuring 1.3 MHz gain bandwidth, 100 dB large-signal voltage gain, and rail-to-rail input common-mode range extending to the negative rail - deployed in automotive sensor signal conditioning, industrial current sensing, and battery-powered instrumentation.
For engineers reviewing the LM2902WDT datasheet, LM2902WDT pinout, LM2902WDT application, or LM2902WDT equivalent, key selection criteria include its guaranteed operation at -40 °C to +125 °C, 375 µA per amplifier supply current, 20 nA input bias current, ESD protection up to 800 V HBM, and compatibility with single-supply systems requiring output swing near ground.
Technical Context
The LM2902WDT integrates four independent, internally frequency-compensated op-amps optimized for wide-voltage single-supply use. Its input stage uses PNP transistors enabling common-mode voltage down to VCC−, while output stage supports sinking up to 70 mA and sourcing capability limited by internal current limiting.
It features robust electrostatic discharge protection (800 V HBM), thermal resistance of 105 °C/W (SO14), and operates across full automotive temperature range (-40 °C to +125 °C) with input offset voltage drift as low as 7 µV/°C (typical) and channel separation ≥120 dB at 1–20 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 1.3 MHz - enables stable unity-gain operation up to ~1.3 MHz with 100 pF load and 2 kΩ RL. |
| Input Common-Mode Range | VCC− to (VCC+ − 1.5 V) - supports direct interfacing with grounded sensors and single-supply ADC drivers. |
| Large-Signal Voltage Gain | 100 dB (typ.) - provides >100,000× open-loop gain for precision DC amplification and error correction. |
| Supply Current per Amplifier | 375 µA (typ.) - allows four-channel amplification in ultra-low-power systems (e.g., <1.5 mA total at 5 V). |
| Input Bias Current | 20 nA (typ.) - minimizes voltage error in high-impedance source applications like thermistor or photodiode interfaces. |
| Input Offset Voltage | 2 mV (max. over temp) - ensures ≤2 mV DC error in precision DC-coupled gain stages without trimming. |
| ESD Protection | 800 V HBM - meets basic handling requirements for automotive assembly lines and industrial PCB handling. |
Pinout & Package
LM2902WDT is housed in a 14-pin SOIC (SO-14) package with standard 1.27 mm pitch, 8.65 mm × 3.90 mm body, and 1.40 mm height. Pin 1 is marked via notch or bevel; device is RoHS-compliant and ECOPACK® certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input (Amp A) | Accepts differential input signal referenced to non-inverting input; high-impedance node (20 nA bias). |
| 2 | Output (Amp A) | Capable of sinking up to 70 mA; output swing reaches within ~20 mV of ground at 10 kΩ load. |
| 3 | Non-inverting input (Amp A) | Supports common-mode voltage down to VCC−; used for reference or sensor return path in single-supply configs. |
| 4 | VCC− (Ground / Negative Supply) | Reference node for all four amplifiers; must be low-impedance to minimize noise coupling between channels. |
| 5 | Inverting input (Amp B) | Independent input for second amplifier; shares no internal nodes with Amp A except supply rails. |
| 6 | Output (Amp B) | Electrically isolated output stage; channel separation ≥120 dB prevents crosstalk in multi-channel filters. |
| 7 | Non-inverting input (Amp B) | Same input structure as Pin 3; enables matched dual-input configurations (e.g., instrumentation amps). |
| 8 | VCC+ (Positive Supply) | Single-supply rail (3–30 V); supply current drain is independent of voltage magnitude (0.7–1.2 mA total @ 25°C). |
| 9 | Inverting input (Amp C) | Third amplifier input; validated for operation at -40 °C to +125 °C with specified offset drift. |
| 10 | Output (Amp C) | Output short-circuit protected; safe infinite-duration short to ground per absolute max ratings. |
| 11 | Non-inverting input (Amp C) | Enables rail-to-rail input operation when VCC− = 0 V - critical for 0–5 V sensor interface designs. |
| 12 | Inverting input (Amp D) | Fourth independent input; supports simultaneous multi-channel signal processing without shared bias paths. |
| 13 | Output (Amp D) | Delivers 26 V high-level output at 30 V supply and 2 kΩ load - suitable for driving logic inputs or level-shifting. |
| 14 | Non-inverting input (Amp D) | Final input node; matches electrical specs of Pins 3/7/11 - enables consistent gain-setting across all four channels. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends to VCC−, enabling direct connection to grounded sensors and eliminating level-shifting circuitry. |
| Low quiescent current per amplifier | 375 µA typical allows four-channel operation under 1.5 mA - ideal for battery-backed or energy-harvesting systems. |
| High CMRR and PSRR | 70–80 dB CMRR and 65–110 dB PSRR ensure stable gain in noisy industrial environments with fluctuating supplies. |
| Automotive-grade temperature range | Qualified from -40 °C to +125 °C per AEC-Q100 - validated for engine control, cabin sensors, and ADAS subsystems. |
| Integrated ESD protection | 800 V HBM on all pins reduces need for external TVS diodes in board-level ESD protection schemes. |
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: Quad op-amp configured as precision inverting amplifier (gain = 10) and active low-pass filter (fc = 10 Hz) for noise rejection. Use Value: Input common-mode range to VCC− enables direct grounding of thermistor return; 2 mV max offset ensures ≤0.2 °C measurement error over full range. |
Use Scenario: Converting 4–20 mA loop current into 0.5–2.5 V analog signal for microcontroller ADC input in PLC I/O modules. IC Role / Device Role / Timing Role: First amplifier acts as precision current-to-voltage converter (Rshunt = 125 Ω); second performs buffer and level shift. Use Value: 20 nA input bias current avoids loading error on shunt resistor; 100 dB gain ensures accurate scaling with <0.1% gain error. |
| Battery-Powered Gas Detector Signal Chain | Medical Patient Monitor Front-End |
|
Use Scenario: Conditioning electrochemical sensor output (sub-mV signals) in portable CO/H2S detectors powered by two AA cells (3 V nominal). IC Role / Device Role / Timing Role: Quad configuration used for transimpedance amplification, baseline correction, filtering, and output buffering. Use Value: 375 µA per amplifier enables full signal chain operation below 1.5 mA; 1.3 MHz GBW supports fast response to gas concentration changes. |
Use Scenario: Amplifying biopotential signals (ECG, EMG) with high common-mode interference in hospital-grade patient monitors. IC Role / Device Role / Timing Role: Configured as 3-op-amp instrumentation amplifier (gain = 101) with matched resistors and guard drive. Use Value: 120 dB channel separation prevents inter-electrode crosstalk; 7 µV/°C offset drift maintains calibration stability during 8-hour monitoring sessions. |
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 core architecture but SOIC-14 with commercial temp range (-40 °C to +105 °C); no AEC-Q100 qualification. | Lacks extended high-temp validation; unsuitable for under-hood automotive use but adequate for industrial controls. | Select LM2902DR only if operating ambient stays ≤105 °C and AEC-Q100 compliance is not required. |
| TLV2464IDR | Rail-to-rail input/output; lower supply current (230 µA/ch); narrower supply range (2.7–6 V); higher cost. | Optimized for low-voltage battery systems (e.g., wearables); cannot replace LM2902WDT in 12 V or 24 V industrial rails. | Choose TLV2464IDR only when RRO and sub-3 V operation are mandatory - not a drop-in replacement for LM2902WDT. |
Compared with LM2902DR and TLV2464IDR, LM2902WDT uniquely combines AEC-Q100 qualification, 3–30 V single-supply flexibility, and 125 °C operation - making it the only option among the three qualified for engine bay or industrial motor control front-ends.
Availability
LM2902WDT is available at Aetrix Electronics and suitable for automotive cabin sensing, industrial 4–20 mA receivers, and battery-powered gas detection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2902WDT 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering silicon solutions for automotive, industrial, power, and smart mobility applications since 1987.
LM2902WDT belongs to ST's precision analog portfolio, specifically engineered for robust, low-power signal conditioning in harsh environments where reliability across extreme temperatures and supply voltages is non-negotiable.
FAQ
Is LM2902WDT pin-compatible with legacy LM2902 variants?
Yes - LM2902WDT uses the standard SO-14 pinout defined in JEDEC MS-012, matching LM2902, LM2902N, and LM2902DT. All four amplifier sections follow identical pin mapping (Pins 1–3, 5–7, 9–11, 12–14), and electrical behavior is fully backward-compatible within its specified operating conditions.
Can LM2902WDT operate from a 3.3 V single supply?
Yes - LM2902WDT is fully specified down to 3 V supply, with guaranteed performance including input common-mode range to ground, 26 mV low-level output voltage at 10 kΩ load, and 1.3 MHz gain bandwidth. It drives standard 3.3 V logic interfaces directly when configured as a comparator or buffer.
What is the maximum capacitive load LM2902WDT can drive stably?
LM2902WDT remains stable with up to 100 pF capacitive load at unity gain (per Figure 22), provided the feedback network uses a minimum 2 kΩ resistor. For loads >100 pF, external compensation (e.g., series resistor at output) is required to maintain phase margin above 30° across -40 °C to +125 °C.
Does LM2902WDT require external compensation components?
No - LM2902WDT includes internal frequency compensation optimized for unity-gain stability with resistive loads up to 2 kΩ and capacitive loads up to 100 pF. External compensation is unnecessary unless driving heavy capacitive loads (>100 pF) or using high-gain configurations with reactive feedback networks.
LM2902WDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Push-Pull
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 1.3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 1.5mA (x4 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
LM2902WDT FAQ
1.How can I place an order for LM2902WDT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2902WDT 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 LM2902WDT reliable?
The price and inventory of LM2902WDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2902WDT is usually 5 days.
3.What payment methods are accepted for LM2902WDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2902WDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2902WDT?
LM2902WDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2902WDT 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 LM2902WDT?
For technical support, including LM2902WDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2902WDT requirements.
6.How does Aetrix verify that LM2902WDT is sourced from the original manufacturer or authorized distributors?
All LM2902WDT 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 LM2902WDT meets industry standards.
7.What is the process for return or replacement of LM2902WDT?
All LM2902WDT units undergo pre-shipment inspection (PSI). If there is an issue with LM2902WDT, 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 LM2902WDT part is unused and in its original packaging.
Return procedure for LM2902WDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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