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Texas Instruments LM4040EIM3-3.0/NOPB
- Part No.:
- LM4040EIM3-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040EIM3-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,726
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Product details
Overview
LM4040EIM3-3.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 3.0 V reverse breakdown voltage with ±2% initial tolerance (Grade E), 100 ppm/°C max temperature coefficient, and 35 μVRMS wideband noise (10 Hz–10 kHz). It operates from 62 μA to 15 mA over −40°C to +85°C and requires no output capacitor-used for ADC/DAC biasing, sensor excitation, and field transmitter calibration.
For engineers reviewing the LM4040EIM3-3.0/NOPB datasheet, LM4040EIM3-3.0/NOPB pinout, LM4040EIM3-3.0/NOPB application, or LM4040EIM3-3.0/NOPB equivalent, key selection criteria include its Grade E tolerance, SOT-23 thermal performance (RθJA = 291.9°C/W), capacitive-load stability, and automotive-grade availability via LM4040Q variants.
Technical Context
The LM4040EIM3-3.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±2% initial accuracy at 25°C and incorporates bandgap-derived curvature correction for stable voltage over temperature. Its low dynamic impedance (≤1.1 Ω at 1 mA) ensures minimal load regulation error across 62 μA–15 mA operating current.
Designed as a two-terminal shunt device, it functions by sinking excess current through the cathode to maintain precise 3.0 V across its terminals-enabling simple, space-constrained biasing without series pass elements or external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, fixed and unadjustable-sets reference level for analog signal chains. |
| Initial Tolerance | ±2% at 25°C (Grade E)-defines worst-case DC offset in precision measurement circuits before temperature drift. |
| Temp Coefficient | ≤100 ppm/°C (max)-limits voltage drift to ±0.024 V over −40°C to +85°C ambient range. |
| Operating Current | 62 μA min / 15 mA max-supports ultra-low-power sensor nodes and high-current DAC buffers without external regulation. |
| Output Noise | 35 μVRMS (10 Hz–10 kHz)-low enough for 16-bit ADC reference without additional filtering. |
| Dynamic Impedance | ≤1.1 Ω at 1 mA-ensures <1 mV load-induced error when sourcing up to 1 mA from reference node. |
| Thermal Hysteresis | 0.08%-guarantees repeatable voltage after thermal cycling, critical for recalibration-free industrial systems. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC-compliant footprint with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current input/output node-connects to supply rail; voltage develops between this and anode. |
| 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 noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable operation with any capacitive load up to 10 nF-eliminates BOM cost and layout area for decoupling. |
| Micropower operation | 62 μA minimum cathode current enables battery-powered field transmitters with >10-year runtime. |
| Capacitive-load tolerance | Immune to oscillation with ceramic bypass caps-simplifies PCB design in mixed-signal systems. |
| Zener-zap voltage trim | Wafer-level trimming ensures ±2% initial accuracy without post-package calibration labor. |
| Bandgap temperature correction | Curvature-compensated design achieves flat VR vs. T curve-reduces need for software compensation. |
Applications
| Industrial Sensor Calibration | Portable Data Acquisition |
|---|---|
Use Scenario: Calibrating 4–20 mA loop-powered pressure sensors in oil & gas field instruments. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.0 V excitation for bridge sensors and ADC reference for digitizing analog outputs. Use Value: ±2% initial tolerance and ≤100 ppm/°C drift ensure calibration validity over full industrial temperature range without field recalibration. |
Use Scenario: Battery-operated handheld multimeter with 16-bit SAR ADC and LCD display. IC Role / Device Role / Timing Role: Low-noise 3.0 V reference for ADC and op-amp signal conditioning stages. Use Value: 35 μVRMS noise and 62 μA min operating current extend battery life while maintaining 16-bit effective resolution. |
| Automotive Cabin Sensors | Energy Metering Front-End |
Use Scenario: Occupancy detection using thermopile-based IR sensors in automotive HVAC control modules. IC Role / Device Role / Timing Role: Precision bias source for thermopile amplification and ADC reference in AEC-Q100-compliant designs. Use Value: LM4040Q variants support Grade 1 (−40°C to +125°C); this LM4040EIM3-3.0/NOPB serves as industrial-grade drop-in for non-critical cabin subsystems. |
Use Scenario: Anti-tampering smart electricity meter requiring metrology-grade voltage reference for current-sense amplifier bias. IC Role / Device Role / Timing Role: Stable 3.0 V shunt reference for isolated current-sense front-end and metrology ADC. Use Value: 0.08% thermal hysteresis prevents measurement drift after power cycling or ambient temperature swings during utility billing cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3-3.0/NOPB | ±0.5% initial tolerance (Grade C), same 3.0 V, SOT-23 package, identical pinout and thermal specs. | Better accuracy for higher-resolution data acquisition where ±2% is insufficient for system-level error budget. | Select when tighter initial tolerance justifies cost premium and long-term stability requirements match. |
| TLVH431IDBVR | Adjustable 1.24–18 V shunt reference, 0.5% initial tolerance, 2% typical tempco, 20 μVRMS noise, SOT-23-3. | Flexible output voltage but requires two external resistors; lower noise but higher min cathode current (80 μA). | Choose when programmable reference voltage is needed and board space allows resistor network. |
Compared with LM4040CIM3-3.0/NOPB, the LM4040EIM3-3.0/NOPB trades ±0.5% accuracy for lower cost and sufficient stability in industrial sensor interfaces; versus TLVH431IDBVR, it offers fixed 3.0 V simplicity and lower quiescent current but less flexibility.
Availability
LM4040EIM3-3.0/NOPB is available at Aetrix Electronics and suitable for industrial sensor calibration, portable data acquisition, automotive cabin sensors, and energy metering front-end designs requiring stable component supply and long-lifecycle support.
Supply support for LM4040EIM3-3.0/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 leader specializing in analog, embedded processing, and connectivity technologies with over 90 years of innovation in precision analog ICs.
The LM4040-N series was designed for space-constrained, low-power applications demanding stable voltage references-targeting field transmitters, data acquisition systems, and automotive sensor modules where size, accuracy, and reliability are critical.
FAQ
What is the minimum operating current for LM4040EIM3-3.0/NOPB?
The LM4040EIM3-3.0/NOPB requires a minimum cathode current of 62 μA at 25°C to maintain regulation. This value increases slightly over temperature-up to 70 μA across the full −40°C to +85°C industrial range-ensuring reliable startup and stability in battery-powered sensor nodes and low-current bias networks.
Does LM4040EIM3-3.0/NOPB require an output capacitor?
No, the LM4040EIM3-3.0/NOPB does not require an output capacitor. Its internal design provides inherent stability with capacitive loads up to 10 nF, eliminating the need for external decoupling and simplifying layout in compact PCBs used for analog front-ends and sensor signal conditioning.
What is the temperature coefficient specification for LM4040EIM3-3.0/NOPB?
The LM4040EIM3-3.0/NOPB has a maximum average temperature coefficient of 100 ppm/°C over −40°C to +85°C. This means its output voltage drift is bounded to ±0.024 V across that range, supporting applications like industrial transmitters where long-term thermal stability is essential without active compensation.
Can LM4040EIM3-3.0/NOPB be used in automotive applications?
The LM4040EIM3-3.0/NOPB is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. For automotive use, TI offers the pin-compatible LM4040Q series (e.g., LM4040QAIM3-3.0/NOPB), which meets Grade 3 (−40°C to +85°C) or Grade 1 (−40°C to +125°C) requirements with extended reliability testing.
What does the 'E' grade signify in LM4040EIM3-3.0/NOPB?
The 'E' in LM4040EIM3-3.0/NOPB denotes Grade E initial reverse breakdown voltage tolerance: ±2% at 25°C. This grade balances cost and performance for applications where moderate accuracy suffices-such as non-critical sensor biasing, power supply monitoring, and general-purpose analog reference duties.
LM4040EIM3-3.0/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:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- 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
LM4040EIM3-3.0/NOPB FAQ
1.How can I place an order for LM4040EIM3-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040EIM3-3.0/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 LM4040EIM3-3.0/NOPB reliable?
The price and inventory of LM4040EIM3-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040EIM3-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040EIM3-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040EIM3-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040EIM3-3.0/NOPB?
LM4040EIM3-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040EIM3-3.0/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 LM4040EIM3-3.0/NOPB?
For technical support, including LM4040EIM3-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040EIM3-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040EIM3-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040EIM3-3.0/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 LM4040EIM3-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040EIM3-3.0/NOPB?
All LM4040EIM3-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040EIM3-3.0/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 LM4040EIM3-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040EIM3-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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