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Texas Instruments LM4040QAIM3-2.5/NOPB
- Part No.:
- LM4040QAIM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040QAIM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,130
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Product details
Overview
LM4040QAIM3-2.5/NOPB from Texas Instruments is an AEC-Q100 Grade 3 qualified precision shunt voltage reference delivering a stable 2.5 V output with ±0.1% initial tolerance (A grade), 35 μVrms wideband noise (10 Hz–10 kHz), and operation across −40°C to +85°C. It functions as a two-terminal, micropower reference in analog signal chains for ADC/DAC biasing, sensor excitation, and power supply monitoring.
For engineers reviewing the LM4040QAIM3-2.5/NOPB datasheet, LM4040QAIM3-2.5/NOPB pinout, LM4040QAIM3-2.5/NOPB application, or LM4040QAIM3-2.5/NOPB equivalent, key selection criteria include its 60 μA minimum operating current, 100 ppm/°C max temperature coefficient, no-output-capacitor requirement, and SOT-23 (DBZ) package compatibility with automotive and industrial PCB layouts.
Technical Context
The LM4040QAIM3-2.5/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.1% accuracy at 25°C and integrates bandgap-derived temperature drift curvature correction. Its low dynamic impedance (0.3–0.8 Ω) and capacitive-load tolerance enable stable regulation without external compensation.
Designed for space-constrained systems, it operates as a two-terminal shunt device-cathode supplies regulated voltage while anode connects to ground-and supports reverse breakdown current from 60 μA to 15 mA, with thermal hysteresis limited to 0.08% over −40°C to +125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal; fixed reverse breakdown voltage optimized for 12-bit+ data acquisition accuracy |
| Initial Tolerance | ±0.1% at 25°C (A grade); enables single-point calibration in field transmitters and analog input modules |
| Temp Coefficient | ≤100 ppm/°C (max); ensures ≤±19 mV total drift over −40°C to +85°C industrial range |
| Operating Current | 60 μA to 15 mA; ultra-low minimum current allows use with high-value series resistors in battery-powered sensors |
| Output Noise | 35 μVrms (10 Hz–10 kHz); low enough to avoid degrading ENOB in 16-bit SAR ADC references |
| Dynamic Impedance | 0.3–0.8 Ω; maintains regulation stability under fast load transients in automotive control units |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body, 1.0 mm max height, JEDEC MO-178 compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / output node | Connects to supply rail via series resistor; delivers regulated 2.5 V to load referenced to ground |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; defines 0 V reference for cathode voltage |
| NC (Pin 3) | No-connect terminal | Internally unconnected; leave floating or tie to anode only if EMI mitigation is required per TI layout guidance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 3 qualification | Validated for automotive applications requiring −40°C to +85°C operation and robust ESD immunity (±2000 V HBM) |
| No output capacitor needed | Eliminates BOM cost and board area for stabilization; simplifies layout in compact modules like analog input cards |
| Tolerates capacitive loads | Stable with >1 μF ceramic output capacitance-enables direct buffering of ADC reference inputs |
| Low 35 μVrms noise | Preserves signal integrity in precision measurement paths where noise floor directly impacts resolution |
| 60 μA min operating current | Supports ultra-low-power designs such as loop-powered 4–20 mA transmitters with minimal quiescent loss |
Applications
| Field Transmitter | Energy Infrastructure |
|---|---|
Use Scenario: 4–20 mA current-loop transmitter in oil/gas pressure sensing with microcontroller-based signal conditioning. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V excitation for bridge sensors and ADC reference voltage. Use Value: ±0.1% tolerance and 100 ppm/°C TC ensure <0.2% full-scale error over temperature without recalibration. | Use Scenario: Smart meter voltage monitoring stage measuring AC mains with isolation and precision scaling. IC Role / Device Role / Timing Role: Primary reference for 24-bit delta-sigma ADC converting scaled line voltage. Use Value: 35 μVrms noise prevents degradation of effective resolution below 22 bits in metrology-grade sampling. |
| Analog Input Module | Automotive Control Unit |
Use Scenario: Industrial PLC analog input card accepting ±10 V, 0–20 mA, and thermocouple signals. IC Role / Device Role / Timing Role: Common reference source for programmable gain instrumentation amplifier and multiplexed ADC front-end. Use Value: Low dynamic impedance (0.8 Ω max) minimizes reference droop during channel switching transients. | Use Scenario: Engine control unit (ECU) monitoring battery voltage, coolant temperature, and throttle position. IC Role / Device Role / Timing Role: Regulated reference for MCU internal ADC and external sensor signal conditioning. Use Value: AEC-Q100 Grade 3 qualification guarantees reliability across automotive temperature and vibration stress profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040AIM3-2.5/NOPB | Industrial-grade (non-automotive qualified); identical electrical specs but lacks AEC-Q100 certification | Not suitable for automotive Tier-1 production; acceptable for industrial prototypes or non-safety-critical systems | Select when AEC-Q100 compliance is not required and cost sensitivity favors standard-grade parts |
| MAX6002AEUR+T | 2.5 V, ±0.2% initial accuracy, 75 ppm/°C TC, higher 65 μVrms noise, SC70-3 package | Lower accuracy and higher drift limit use in <14-bit systems; SC70 footprint differs from SOT-23 | Consider only if SOT-23 footprint is not mandatory and thermal performance margin permits higher TC |
Compared with LM4040AIM3-2.5/NOPB, the LM4040QAIM3-2.5/NOPB adds automotive qualification without sacrificing accuracy or noise; versus MAX6002AEUR+T, it provides tighter tolerance, lower TC, and lower noise in a pin-compatible SOT-23 package-making it superior for high-resolution, automotive-grade analog measurement.
Availability
LM4040QAIM3-2.5/NOPB is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure meters, and automotive control units requiring stable component supply with guaranteed long-term manufacturability and automotive-grade traceability.
Supply support for LM4040QAIM3-2.5/NOPB 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 reference design and automotive qualification.
The LM4040-N/Q1 product line delivers micropower, high-accuracy shunt references for space-constrained, mission-critical applications including automotive sensors, industrial automation, and smart grid infrastructure.
FAQ
What is the maximum operating current for LM4040QAIM3-2.5/NOPB?
The LM4040QAIM3-2.5/NOPB supports a maximum operating current of 15 mA. This upper limit ensures safe power dissipation within the SOT-23 package's 306 mW rating at 25°C ambient, and remains valid across its full −40°C to +85°C industrial temperature range. Exceeding 15 mA risks thermal overstress and parametric shift in the LM4040QAIM3-2.5/NOPB.
Does LM4040QAIM3-2.5/NOPB require an external output capacitor?
No, the LM4040QAIM3-2.5/NOPB does not require an external output capacitor for stability. Its internal design eliminates the need for stabilization components, and it tolerates capacitive loads up to at least 1 μF-verified in TI's characterization. This simplifies layout and reduces BOM count in applications like portable data loggers using the LM4040QAIM3-2.5/NOPB.
What is the temperature coefficient specification for LM4040QAIM3-2.5/NOPB?
The LM4040QAIM3-2.5/NOPB has a maximum average temperature coefficient of 100 ppm/°C over −40°C to +85°C. This value is specified for the A-grade device and defines the worst-case drift slope relative to 25°C; actual performance in production units is typically better, and the LM4040QAIM3-2.5/NOPB achieves this spec across its full qualified temperature range.
Is LM4040QAIM3-2.5/NOPB pin-compatible with LM4040AIM3-2.5/NOPB?
Yes, the LM4040QAIM3-2.5/NOPB is pin-compatible with the LM4040AIM3-2.5/NOPB-both use the same SOT-23 (DBZ) package with identical pin 1 (cathode), pin 2 (anode), and pin 3 (NC) assignments. The only functional difference is AEC-Q100 Grade 3 qualification; all electrical characteristics, thermal behavior, and layout requirements match between the two parts.
What is the wideband noise performance of LM4040QAIM3-2.5/NOPB?
The LM4040QAIM3-2.5/NOPB delivers 35 μVrms wideband noise over the 10 Hz to 10 kHz frequency range, measured at 100 μA operating current. This low-noise characteristic is critical for high-resolution data acquisition systems, and the LM4040QAIM3-2.5/NOPB maintains this spec across its full operating current range and temperature envelope.
LM4040QAIM3-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040QAIM3-2.5/NOPB FAQ
1.How can I place an order for LM4040QAIM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040QAIM3-2.5/NOPB 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 LM4040QAIM3-2.5/NOPB reliable?
The price and inventory of LM4040QAIM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040QAIM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040QAIM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040QAIM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040QAIM3-2.5/NOPB?
LM4040QAIM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040QAIM3-2.5/NOPB 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 LM4040QAIM3-2.5/NOPB?
For technical support, including LM4040QAIM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040QAIM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4040QAIM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040QAIM3-2.5/NOPB 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 LM4040QAIM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040QAIM3-2.5/NOPB?
All LM4040QAIM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040QAIM3-2.5/NOPB, 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 LM4040QAIM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040QAIM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040QAIM3-2.5/NOPB Tags
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