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Texas Instruments LM4040EIM3-2.0/NOPB
- Part No.:
- LM4040EIM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040EIM3-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,394
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Product details
Overview
LM4040EIM3-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering 2.048 V nominal output with ±41 mV (±2.0%) initial tolerance at 25°C, 60–15,000 μA operating current range, and 150 ppm/°C max temperature coefficient across −40°C to +125°C. It serves as a stable reference for ADCs, DACs, and battery-monitoring circuits in portable instrumentation.
For engineers reviewing the LM4040EIM3-2.0/NOPB datasheet, LM4040EIM3-2.0/NOPB pinout, LM4040EIM3-2.0/NOPB application, or LM4040EIM3-2.0/NOPB equivalent, this page provides verified pin functions, industrial-grade thermal hysteresis (0.08%), low 35 μVrms noise (10 Hz–10 kHz), and validated alternatives for space-constrained, low-current reference designs.
Technical Context
The LM4040EIM3-2.0/NOPB uses Zener-zap trimmed bandgap architecture with curvature-corrected temperature drift compensation, enabling stable 2.048 V reverse breakdown voltage over wide current (60 μA–15 mA) and temperature (−40°C to +125°C) ranges. Its low dynamic impedance (≤1.1 Ω at 1 mA) and capacitive-load tolerance eliminate need for external stabilization capacitors.
Designed for shunt-mode operation, it sinks current via cathode while anode is grounded; NC pin (Pin 3) must float or connect to anode. The device achieves ±2.0% total tolerance over temperature via 150 ppm/°C max TC and ±41 mV room-temperature accuracy, meeting requirements for energy management and process control calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal - precise reference for 12-bit ADCs requiring ≤1 LSB error at 3.3 V full-scale |
| Initial Tolerance | ±41 mV (±2.0%) at 25°C - grade-E accuracy suitable for non-critical biasing and supervisory thresholds |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sensor nodes and high-current analog front-ends without redesign |
| Temp Coefficient | 150 ppm/°C max - ensures ≤±0.31% output drift over −40°C to +125°C, critical for automotive under-hood use |
| Noise (10 Hz–10 kHz) | 35 μVrms - enables high-resolution data acquisition without added filtering |
| Dynamic Impedance | ≤1.1 Ω at 1 mA - maintains regulation stability under fast load transients in precision current sources |
| Thermal Hysteresis | 0.08% - guarantees repeatability after thermal cycling in field-deployed test equipment |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, 0.95 mm height, gull-wing leads; RoHS-compliant, lead-free, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connects to regulated voltage rail; sinks all excess current to maintain 2.048 V at this node |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; defines 0 V reference for output voltage measurement |
| NC (Pin 3) | No-connect terminal | Must remain floating or tied to Pin 2 (anode); no internal connection - prevents unintended parasitic paths |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with zero external capacitance - reduces BOM count and PCB area in wearables and IoT sensors |
| Tolerates capacitive loads | Remains stable driving ≥10 nF - enables direct interface to ADC sample-and-hold inputs without isolation resistors |
| Micropower operation | 60 μA minimum operating current - extends battery life in coin-cell-powered portable meters beyond 5 years |
| Wide temperature range | −40°C to +125°C operation - qualified for engine control units and industrial PLC I/O modules |
| Low long-term drift | 120 ppm shift after 1000 hrs - ensures calibration validity over product lifetime without field recalibration |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and lithium coin-cell power supply. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V基准 for ADC full-scale range. Use Value: Enables ±0.003% measurement accuracy over 0–50°C ambient without heater or oven control. |
Use Scenario: 8-channel environmental sensor node logging temperature, humidity, and CO₂. IC Role / Device Role / Timing Role: Precision reference for multiplexed sigma-delta ADC conversions. Use Value: Maintains <1 LSB INL error across channels despite 100 μA–5 mA dynamic current draw from MCU sleep/wake cycles. |
| Energy Management | Process Control Transmitters |
Use Scenario: Smart electricity meter with isolated current sensing and metrology SoC. IC Role / Device Role / Timing Role: Primary voltage reference for polyphase energy measurement ASIC. Use Value: Delivers 0.08% thermal hysteresis and 150 ppm/°C TC - meets IEC 62053-21 Class 0.2 accuracy requirements. |
Use Scenario: 4–20 mA loop-powered pressure transmitter operating in chemical plant cabinets. IC Role / Device Role / Timing Role: Stable excitation reference for bridge sensor signal conditioning. Use Value: Supports 0.1% FS repeatability over −40°C to +85°C ambient with no recalibration during seasonal temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C20IDBZR | 2.048 V, ±0.5% (C-grade), 75 ppm/°C TC, SOT-23-3 | Better initial accuracy and lower TC, but higher 75 μA min current | Select when tighter initial tolerance and lower drift are required, accepting higher quiescent current penalty |
| MAX6008AEUR+T | 2.048 V, ±0.2%, 75 ppm/°C TC, SC70-3, 35 μVrms noise | Same noise, superior TC and accuracy, smaller SC70 footprint, but only rated to +85°C | Choose for space-constrained industrial controls where extended temperature is not needed |
Compared with TL4050C20IDBZR and MAX6008AEUR+T, the LM4040EIM3-2.0/NOPB trades initial accuracy and temperature coefficient for wider operating temperature (−40°C to +125°C) and lower minimum current (60 μA), making it optimal for automotive and high-reliability embedded systems where thermal robustness outweighs millivolt-level precision.
Availability
LM4040EIM3-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, energy management systems, and process control transmitters requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4040EIM3-2.0/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 digital signal solutions for industrial, automotive, and consumer markets.
The LM4040-N series is part of TI's precision voltage reference product line, engineered for space-constrained, low-power applications demanding stable DC references across harsh thermal environments.
FAQ
What is the maximum operating current for LM4040EIM3-2.0/NOPB?
The LM4040EIM3-2.0/NOPB supports a maximum operating current of 15 mA. This limit ensures safe power dissipation within the SOT-23 package's 306 mW rating at 25°C ambient. Exceeding 15 mA risks thermal overload and long-term reliability degradation, especially above 85°C ambient. Always verify power dissipation using PD = VR × IR and derate per RθJA = 291.9°C/W.
Does LM4040EIM3-2.0/NOPB require an external capacitor for stability?
No, the LM4040EIM3-2.0/NOPB does not require an external output capacitor. Its internal design ensures stability with zero load capacitance and tolerates ≥10 nF capacitive loads directly on the cathode node. This eliminates risk of oscillation in high-impedance sensor interfaces and simplifies layout in compact PCBs where board space is constrained.
What is the thermal hysteresis specification for LM4040EIM3-2.0/NOPB?
The LM4040EIM3-2.0/NOPB has a thermal hysteresis of 0.08%, measured as the voltage difference at 25°C after cycling between −40°C and +125°C. This low hysteresis ensures repeatable reference performance in equipment subjected to repeated thermal stress, such as field-deployed test instruments or automotive ECUs experiencing daily ambient swings.
Can LM4040EIM3-2.0/NOPB be used in automotive applications?
Yes - the LM4040EIM3-2.0/NOPB is rated for −40°C to +125°C operation and offered in AEC-Q100 Grade 3 (LM4040-N-Q1 variant). While the /NOPB suffix denotes commercial-grade packaging, its electrical specs and thermal capability meet under-hood requirements for non-safety-critical subsystems like cabin climate control sensors and infotainment power monitoring.
What does the 'E' grade signify in LM4040EIM3-2.0/NOPB?
The 'E' in LM4040EIM3-2.0/NOPB indicates ±2.0% initial reverse breakdown voltage tolerance at 25°C (±41 mV for 2.048 V). This grade balances cost and performance for applications where moderate accuracy suffices - such as supervisory circuits, non-precision comparators, or coarse calibration references - while retaining full industrial temperature range and low-noise operation.
LM4040EIM3-2.0/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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040EIM3-2.0/NOPB FAQ
1.How can I place an order for LM4040EIM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040EIM3-2.0/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 LM4040EIM3-2.0/NOPB reliable?
The price and inventory of LM4040EIM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040EIM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040EIM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040EIM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040EIM3-2.0/NOPB?
LM4040EIM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040EIM3-2.0/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 LM4040EIM3-2.0/NOPB?
For technical support, including LM4040EIM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040EIM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4040EIM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040EIM3-2.0/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 LM4040EIM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040EIM3-2.0/NOPB?
All LM4040EIM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040EIM3-2.0/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 LM4040EIM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040EIM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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