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Texas Instruments LM4040QEIM3-2.5/NOPB
- Part No.:
- LM4040QEIM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040QEIM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,667
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Product details
Overview
LM4040QEIM3-2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 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 +125°C and requires no output capacitor-used in automotive sensor signal conditioning and high-accuracy ADC biasing.
For engineers reviewing the LM4040QEIM3-2.5/NOPB datasheet, LM4040QEIM3-2.5/NOPB pinout, LM4040QEIM3-2.5/NOPB application, or LM4040QEIM3-2.5/NOPB equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade thermal performance, and real-world design context for field transmitters, energy infrastructure monitoring, and analog input modules.
Technical Context
The LM4040QEIM3-2.5/NOPB implements a Zener-zap trimmed bandgap reference architecture with curvature-corrected temperature drift compensation, enabling stable 2.5 V output across industrial and extended automotive temperature ranges. Its low dynamic impedance (0.9 Ω typical at 1 mA) and capacitive-load tolerance eliminate external stabilization components.
Designed for AEC-Q100 Grade 1 (−40°C to +125°C) and Grade 3 (−40°C to +85°C) compliance, it features fuse-based wafer-sort trimming for ±0.5% initial accuracy and supports long-term stability of 120 ppm over 1000 hours at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage, fixed and factory-trimmed-enables direct replacement of 2.5 V references without resistor networks. |
| Initial Tolerance | ±0.5% at 25°C (Grade C)-guarantees ≤ ±12.5 mV deviation before temperature or load effects. |
| Temp Coefficient | ≤100 ppm/°C max over −40°C to +125°C-limits worst-case drift to ±25 mV across full automotive range. |
| Operating Current | 60 μA to 15 mA-supports ultra-low-power sensor biasing and high-current DAC reference buffering. |
| Noise (10 Hz–10 kHz) | 35 μVrms typical-meets precision data acquisition requirements for 16-bit+ ADCs. |
| Dynamic Impedance | 0.9 Ω typical at 1 mA-ensures minimal load-regulation error (<1 mV) under current step changes. |
| Long-Term Stability | 120 ppm over 1000 hours at 25°C-reduces calibration frequency in field-deployed instrumentation. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178 compatible. Thermal resistance RθJA = 291.9°C/W (board-mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current path and output voltage node-connects to regulated rail; sinks all reference current. |
| Anode (Pin 2) | O | Ground reference terminal-must be connected to system ground or low-impedance return path. |
| NC (Pin 3) | - | No-connect terminal-left floating or tied to anode per EMI mitigation guidance in high-noise environments. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Grade 1 (−40°C to +125°C) and Grade 3 (−40°C to +85°C) certified-validates use in engine control, battery management, and ADAS sensors. |
| No Output Capacitor Required | Stable operation with zero external capacitance-reduces BOM count and PCB area in space-constrained modules. |
| Capacitive Load Tolerance | Stable with any value of output capacitance-enables direct connection to ADC input caps or long trace routing without oscillation. |
| Zener-Zap Trim Accuracy | Factory-trimmed via wafer-level fuse programming-ensures ±0.5% initial tolerance without post-package calibration. |
| Low Quiescent Current | 60 μA minimum operating current-extends battery life in portable field transmitters and wireless sensor nodes. |
Applications
| Field Transmitters | Energy Infrastructure Monitoring |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitter in oil & gas wellheads. IC Role / Device Role / Timing Role: Shunt reference for DAC output scaling and sensor excitation current regulation. Use Value: 100 ppm/°C tempco ensures ≤0.025% FS error over −40°C to +125°C ambient, meeting IEC 61293 Class 0.1 accuracy. |
Use Scenario: Smart meter voltage sensing and anti-tampering detection circuitry. IC Role / Device Role / Timing Role: Precision 2.5 V reference for 24-bit sigma-delta ADC measuring grid voltage harmonics. Use Value: 35 μVrms noise enables >100 dB SNR at 10 kHz bandwidth, supporting IEEE 1459 power quality analysis. |
| Analog Input Modules | Automotive Sensor Signal Conditioning |
Use Scenario: Industrial PLC analog input card accepting ±10 V, 0–20 mA, and thermocouple inputs. IC Role / Device Role / Timing Role: Common-mode reference for programmable gain instrumentation amplifiers and multiplexed ADC front-end. Use Value: 0.9 Ω dynamic impedance maintains ≤0.5 LSB error across 16-bit resolution despite channel switching transients. |
Use Scenario: Cabin air quality sensor (CO₂/NH₃) with microcontroller-based signal processing. IC Role / Device Role / Timing Role: Stable bias reference for op-amp signal conditioning and ADC reference in ASIL-B subsystems. Use Value: AEC-Q100 Grade 1 qualification and 120 ppm long-term stability reduce recalibration intervals to ≥5 years in vehicle lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C25IDBZR | 2.5 V, ±0.5% initial tolerance, 75 ppm/°C max tempco, SOT-23 package, but rated only to +105°C (not AEC-Q100 qualified). | Lacks automotive temperature range and qualification-suitable for industrial PLCs but not engine bay or battery pack monitoring. | Select when cost sensitivity outweighs automotive qualification and extended temperature need. |
| MAX6008AEUR+T | 2.5 V, ±0.2% initial tolerance, 50 ppm/°C max tempco, SOT-23, but 100 μA min operating current and no AEC-Q100 rating. | Higher accuracy and lower drift, but incompatible with ultra-low-power <60 μA designs and unqualified for automotive safety systems. | Prefer for high-precision lab equipment where supply current >100 μA is available and AEC-Q100 is unnecessary. |
Compared with TL4050C25IDBZR and MAX6008AEUR+T, the LM4040QEIM3-2.5/NOPB uniquely combines AEC-Q100 Grade 1 qualification, 60 μA minimum current, and SOT-23 footprint-making it the only drop-in solution for automotive-grade, space-constrained, micropower reference designs.
Availability
LM4040QEIM3-2.5/NOPB is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure monitoring, and automotive sensor signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4040QEIM3-2.5/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 series was engineered specifically for high-accuracy, low-power, space-constrained applications-including automotive sensors, industrial process control, and portable instrumentation-where stability, small size, and qualification rigor are non-negotiable.
FAQ
What is the maximum operating temperature range for LM4040QEIM3-2.5/NOPB?
The LM4040QEIM3-2.5/NOPB is AEC-Q100 qualified for Grade 1 (−40°C to +125°C) and Grade 3 (−40°C to +85°C) operation. Its electrical characteristics-including ±0.5% initial tolerance and ≤100 ppm/°C temperature coefficient-are fully specified across the −40°C to +125°C range, making it suitable for under-hood automotive and industrial edge applications.
Does LM4040QEIM3-2.5/NOPB require an external output capacitor?
No, the LM4040QEIM3-2.5/NOPB does not require an external output capacitor. Its internal design provides inherent stability with zero or arbitrary capacitive loads-eliminating the need for external bypassing and reducing PCB footprint and BOM cost in compact field transmitter and sensor module designs.
What is the minimum operating current for LM4040QEIM3-2.5/NOPB?
The LM4040QEIM3-2.5/NOPB has a minimum operating current of 60 μA at 25°C, increasing to 65 μA over the full −40°C to +125°C range. This ultra-low quiescent current enables use in battery-powered devices such as wireless sensor nodes and portable diagnostic tools where standby power must remain below 100 μW.
How does the pin configuration of LM4040QEIM3-2.5/NOPB differ from standard 3-pin SOT-23 references?
The LM4040QEIM3-2.5/NOPB uses a 3-pin SOT-23 (DBZ) package with Pin 1 = Cathode (output), Pin 2 = Anode (ground), and Pin 3 = NC (no-connect). Unlike standard regulators, Pin 3 is unused but may be tied to Pin 2 in high-EMI environments per TI's layout guidance-providing noise immunity without altering core functionality.
Is LM4040QEIM3-2.5/NOPB pin-compatible with other LM4040 variants?
Yes, all LM4040-N and LM4040-Q1 SOT-23 variants-including LM4040AIM3-2.5/NOPB and LM4040BIM3-2.5/NOPB-share identical DBZ package pinout (Cathode-Anode-NC). The LM4040QEIM3-2.5/NOPB can be substituted on the same footprint, though designers must verify tolerance grade (C vs A/B), tempco, and qualification level for target application requirements.
LM4040QEIM3-2.5/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:
- ±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
LM4040QEIM3-2.5/NOPB FAQ
1.How can I place an order for LM4040QEIM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040QEIM3-2.5/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 LM4040QEIM3-2.5/NOPB reliable?
The price and inventory of LM4040QEIM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040QEIM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040QEIM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040QEIM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040QEIM3-2.5/NOPB?
LM4040QEIM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040QEIM3-2.5/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 LM4040QEIM3-2.5/NOPB?
For technical support, including LM4040QEIM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040QEIM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4040QEIM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040QEIM3-2.5/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 LM4040QEIM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040QEIM3-2.5/NOPB?
All LM4040QEIM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040QEIM3-2.5/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 LM4040QEIM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040QEIM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040QEIM3-2.5/NOPB Tags
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