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Texas Instruments LM4040QEIM3X2.5/NOPB
- Part No.:
- LM4040QEIM3X2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040QEIM3X2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,200
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Product details
Overview
LM4040QEIM3X2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 2.5 V reverse breakdown voltage with ±0.5% initial tolerance (Grade C), 100 ppm/°C max temperature coefficient, and 35 μVRMS wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA over −40°C to +85°C and is AEC-Q100 Grade 3 qualified for automotive analog input modules.
For engineers reviewing the LM4040QEIM3X2.5/NOPB datasheet, LM4040QEIM3X2.5/NOPB pinout, LM4040QEIM3X2.5/NOPB application, or LM4040QEIM3X2.5/NOPB equivalent, key selection criteria include its shunt topology, no-output-capacitor requirement, capacitive-load tolerance, low dynamic impedance (0.9 Ω typical), and AEC-Q100 qualification for field transmitters and energy infrastructure systems.
Technical Context
The LM4040QEIM3X2.5/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.5% initial accuracy at 25°C and incorporates bandgap-derived curvature correction for stable voltage drift across temperature. Its shunt architecture requires an external current-limiting resistor and sinks load current via cathode while referencing anode to ground.
It supports stable operation with any capacitive load without external compensation and maintains low output impedance (0.9 Ω typical at 1 mA) across its 60 μA–15 mA operating range, enabling use in high-precision ADC biasing and sensor excitation where low noise and minimal thermal hysteresis (0.08%) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage - sets precise bias point for ADC references and sensor bridges. |
| Initial Tolerance | ±0.5% at 25°C (Grade C) - enables single-point calibration in industrial data acquisition without trimming. |
| Temp Coefficient | 100 ppm/°C max - ensures ≤±19 mV total drift over −40°C to +85°C for stable field transmitter performance. |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sensor nodes and high-current analog front-ends with same device. |
| Output Noise | 35 μVRMS (10 Hz–10 kHz) - minimizes quantization error in 16-bit+ data acquisition systems. |
| Dynamic Impedance | 0.9 Ω typical at 1 mA - provides high PSRR and low load regulation error (<8 mV change over 1–15 mA). |
| Thermal Hysteresis | 0.08% - guarantees repeatable voltage after thermal cycling in automotive under-hood environments. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178AC compliant. Anode (pin 2) connects to ground; cathode (pin 1) carries shunt current and delivers regulated voltage; pin 3 is NC (no connect) and must float or tie to anode per EMI mitigation guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / output node | Regulated 2.5 V appears here relative to anode; requires series resistor to set operating current. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; defines zero-reference for shunt voltage regulation. |
| NC (Pin 3) | No-connect terminal | Must remain unconnected or tied to anode to reduce EMI susceptibility in noisy automotive environments. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained PCB layouts in analog input modules without stability compromises. |
| Tolerates capacitive loads | Supports direct connection to ADC input capacitors or long traces without oscillation risk. |
| AEC-Q100 Grade 3 qualified | Validated for −40°C to +85°C automotive operation, including engine control and battery monitoring. |
| Low 35 μVRMS noise | Preserves SNR in precision 24-bit delta-sigma ADCs used in energy metering applications. |
| Zener-zap trimmed accuracy | Ensures ±0.5% initial tolerance without post-package calibration, reducing test time and cost. |
Applications
| Field Transmitters | Energy Infrastructure |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitters in oil & gas plants. IC Role / Device Role / Timing Role: Shunt voltage reference for DAC output scaling and sensor bridge excitation. Use Value: ±0.5% tolerance and 100 ppm/°C TC ensure <0.1% full-scale error over plant ambient range. | Use Scenario: Smart electricity meters with polyphase energy measurement ICs. IC Role / Device Role / Timing Role: Precision 2.5 V reference for 24-bit sigma-delta ADCs measuring voltage/current. Use Value: 35 μVRMS noise and low thermal hysteresis maintain Class 0.2 meter accuracy across temperature cycles. |
| Analog Input Module | Automotive |
Use Scenario: Industrial PLC analog input cards accepting ±10 V or 4–20 mA signals. IC Role / Device Role / Timing Role: Stable reference for programmable gain instrumentation amplifiers and multiplexed ADC drivers. Use Value: Wide 60 μA–15 mA current range allows shared reference across multiple signal chains without buffering. | Use Scenario: Battery management systems (BMS) in 12 V automotive platforms. IC Role / Device Role / Timing Role: Reference for cell voltage monitoring ADCs and thermal sensor interfaces. Use Value: AEC-Q100 Grade 3 qualification and −40°C to +85°C operation guarantee reliability under hood conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3X2.5/NOPB | Same 2.5 V, ±0.5% tolerance, SOT-23, but non-automotive grade (no AEC-Q100 qualification) | Lacks AEC-Q100 Grade 3 validation; not suitable for automotive BMS or ADAS sensor modules | Select when cost-sensitive industrial DAQ requires identical specs without automotive certification. |
| MAX6008AEUR+T | 2.5 V shunt reference, ±0.2% initial tolerance, 75 ppm/°C TC, SC70-3 package, 10 μA min current | Lower TC and tighter tolerance but higher min current; SC70 footprint differs from SOT-23 | Choose for ultra-stable sensor excitation where board space permits SC70 and tighter spec justifies cost premium. |
Compared with LM4040CIM3X2.5/NOPB, the LM4040QEIM3X2.5/NOPB adds AEC-Q100 qualification without sacrificing noise or dynamic impedance; versus MAX6008AEUR+T, it trades tighter tolerance for lower minimum current and SOT-23 compatibility in automotive-restricted layouts.
Availability
LM4040QEIM3X2.5/NOPB is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure metering, and automotive battery monitoring requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for LM4040QEIM3X2.5/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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management ICs for industrial, automotive, and communications markets.
The LM4040-N/Q1 product line delivers precision shunt voltage references optimized for space-constrained, high-reliability applications including automotive sensors, smart grid infrastructure, and portable instrumentation.
FAQ
What is the operating temperature range for the LM4040QEIM3X2.5/NOPB?
The LM4040QEIM3X2.5/NOPB is rated for −40°C to +85°C (Industrial Grade, AEC-Q100 Grade 3). This range is validated per AEC-Q100 stress testing and supports deployment in automotive cabin and under-hood modules where ambient temperatures remain within these limits. The device's 100 ppm/°C max temperature coefficient ensures predictable voltage drift across this span.
Does the LM4040QEIM3X2.5/NOPB require an external output capacitor?
No, the LM4040QEIM3X2.5/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to ADC input capacitors or long PCB traces. This eliminates BOM cost and layout area typically needed for decoupling, making it ideal for compact analog input modules and field transmitters.
What is the minimum operating current for the LM4040QEIM3X2.5/NOPB?
The LM4040QEIM3X2.5/NOPB has a minimum operating current of 60 μA at 25°C, increasing to 65 μA over the full −40°C to +85°C range. This ultra-low current enables use in battery-powered sensor nodes and energy-harvesting systems while maintaining 2.5 V regulation within ±0.5% tolerance and 100 ppm/°C TC.
How is the LM4040QEIM3X2.5/NOPB pinout configured in the SOT-23 package?
In the SOT-23 (DBZ) package, LM4040QEIM3X2.5/NOPB has Cathode on pin 1 (output/shunt current path), Anode on pin 2 (ground reference), and pin 3 as NC (no connect). Pin 3 must either float or connect to pin 2 to suppress EMI in automotive environments - a requirement explicitly stated in TI's layout guidance for noise-sensitive applications.
Is the LM4040QEIM3X2.5/NOPB compatible with lead-free reflow processes?
Yes, the LM4040QEIM3X2.5/NOPB is RoHS-compliant and qualified for standard lead-free reflow profiles (J-STD-020, peak 260°C). Its SOT-23 package meets JEDEC moisture sensitivity level 1 (MSL-1), eliminating bake requirements prior to assembly. This ensures reliable manufacturability in high-volume automotive and industrial electronics production lines.
LM4040QEIM3X2.5/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:
- ±2%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 70 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040QEIM3X2.5/NOPB FAQ
1.How can I place an order for LM4040QEIM3X2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040QEIM3X2.5/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 LM4040QEIM3X2.5/NOPB reliable?
The price and inventory of LM4040QEIM3X2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040QEIM3X2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040QEIM3X2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040QEIM3X2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040QEIM3X2.5/NOPB?
LM4040QEIM3X2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040QEIM3X2.5/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 LM4040QEIM3X2.5/NOPB?
For technical support, including LM4040QEIM3X2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040QEIM3X2.5/NOPB requirements.
6.How does Aetrix verify that LM4040QEIM3X2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040QEIM3X2.5/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 LM4040QEIM3X2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040QEIM3X2.5/NOPB?
All LM4040QEIM3X2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040QEIM3X2.5/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 LM4040QEIM3X2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040QEIM3X2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040QEIM3X2.5/NOPB Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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