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Texas Instruments LM4040EIZ-3.0/NOPB
- Part No.:
- LM4040EIZ-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040EIZ-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 2% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,808
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Product details
Overview
LM4040EIZ-3.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in TO-92 package, delivering a stable 3.0 V reverse breakdown voltage with ±2.0% initial tolerance (E-grade) at 25°C, 62 μA minimum operating current, and 100 ppm/°C max temperature coefficient - used for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040EIZ-3.0/NOPB datasheet, LM4040EIZ-3.0/NOPB pinout, LM4040EIZ-3.0/NOPB application, or LM4040EIZ-3.0/NOPB equivalent, this page provides verified pin functions, real-world operating current limits, thermal hysteresis (0.08%), noise performance (35 μVrms), and direct alternative part comparisons for industrial and automotive-grade designs.
Technical Context
The LM4040EIZ-3.0/NOPB operates as a two-terminal shunt reference: cathode accepts input current and delivers regulated 3.0 V output referenced to anode (ground), with no external capacitor required. Its bandgap-derived Zener-zap trimmed structure ensures stable reverse breakdown across −40°C to +125°C.
It exhibits low dynamic impedance (≤1.1 Ω at 1 mA), wide operating current range (62 μA to 15 mA), and load regulation of ≤10 mV over full current range - enabling use in low-power data acquisition systems where supply headroom is constrained and capacitive loading varies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, fixed and factory-trimmed |
| Initial Tolerance | ±2.0% at 25°C (E-grade), corresponding to ±60 mV absolute error |
| Temp Coefficient | Max 100 ppm/°C over −40°C to +125°C, contributing ≤±30 mV drift across full range |
| Min Operating Current | 62 μA at 25°C - sets lowest usable bias for battery-powered sleep modes |
| Dynamic Impedance | ≤1.1 Ω at 1 mA - ensures <1 mV output shift per 1 mA load transients |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz) - suitable for 12-bit+ precision measurement front-ends |
| Thermal Hysteresis | 0.08% - ≤2.4 mV voltage shift after thermal cycling between −40°C and +125°C |
Pinout & Package
LM4040EIZ-3.0/NOPB uses the 3-pin TO-92 package (body size 4.30 mm × 4.30 mm), with leads designated Anode (pin 1), Cathode (pin 2), and NC (pin 3). Pin 3 must be left floating or tied to pin 1 (anode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Connected to system ground; all voltage regulation is measured relative to this terminal |
| Cathode (Pin 2) | Shunt current input / regulated output | Accepts bias current and sources regulated 3.0 V to load; functions as both input and output node |
| NC (Pin 3) | No-connect terminal | Must remain unconnected or tied to pin 1; no internal connection or function |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained PCB layouts without stability-compromising external components |
| Tolerates capacitive loads | Stable operation with up to 10 nF load capacitance - eliminates need for series isolation resistors |
| Micropower operation | 62 μA minimum current enables >1-year battery life in ultra-low-duty-cycle sensor nodes |
| Extended temperature range | Specified from −40°C to +125°C - supports under-hood automotive and industrial control applications |
| Zener-zap trimmed accuracy | Fuse-based wafer-level trimming achieves E-grade ±2.0% tolerance without post-package calibration |
Applications
| Portable Data Loggers | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered environmental monitoring unit sampling temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.0 V excitation for resistive humidity sensor and reference for 12-bit SAR ADC. Use Value: 62 μA min current allows microcontroller to fully shut down between samples, extending CR2032 battery life beyond 18 months. |
Use Scenario: Occupant detection system using thermistor arrays inside vehicle seats. IC Role / Device Role / Timing Role: Precision 3.0 V reference for ratiometric measurement of seat temperature gradients. Use Value: 100 ppm/°C tempco and 0.08% thermal hysteresis ensure <±0.5°C measurement repeatability across cabin thermal cycles. |
| Industrial Process Transmitters | Medical Vital Sign Monitors |
Use Scenario: 4–20 mA loop-powered pressure transmitter with local digital display. IC Role / Device Role / Timing Role: Reference for DAC generating analog output and for internal ADC measuring supply rail. Use Value: Low 35 μVrms noise prevents quantization errors in 16-bit conversion, meeting IEC 61000-4-5 surge immunity requirements. |
Use Scenario: Portable pulse oximeter requiring stable analog front-end during intermittent LED drive pulses. IC Role / Device Role / Timing Role: Shunt reference supplying bias to photodiode transimpedance amplifier and ADC reference. Use Value: Stable 3.0 V output under pulsed 15 mA load ensures SpO₂ calculation accuracy remains within ±1% clinical tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | Adjustable 2.495 V reference; requires two external resistors to set 3.0 V; higher 70 μA min current | Used where programmability or tighter initial tolerance (±0.5%) is needed; less suitable for space-constrained TO-92 layouts | Select when design requires adjustable output or integration with feedback loops; not drop-in due to 3-pin SOT-23 vs. 3-pin TO-92 footprint mismatch |
| MAX6003EUR+T | Fixed 3.0 V shunt reference; ±0.5% initial tolerance; SC70-3 package; 65 μA min current | Better accuracy for high-precision medical or test equipment; smaller footprint but lower power dissipation rating (241 mW vs. 550 mW) | Choose for compact surface-mount designs needing improved tolerance; TO-92 mechanical mounting and thermal mass advantages retained only with LM4040EIZ-3.0/NOPB |
Compared with TL431CDBZR and MAX6003EUR+T, the LM4040EIZ-3.0/NOPB offers superior thermal robustness (550 mW TO-92 power rating), mechanical mounting flexibility, and proven long-term stability (120 ppm drift over 1000 hrs), making it preferred for field-deployed industrial sensors and automotive modules where reliability outweighs marginal accuracy gains.
Availability
LM4040EIZ-3.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and industrial process transmitters requiring stable component supply with extended temperature support and legacy through-hole compatibility.
Supply support for LM4040EIZ-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 decades of expertise in precision reference design.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-reliability applications - including automotive, industrial sensing, and portable medical devices.
FAQ
What is the maximum operating current for LM4040EIZ-3.0/NOPB?
The LM4040EIZ-3.0/NOPB supports a maximum operating current of 15 mA. This limit is defined by absolute maximum ratings and thermal constraints of the TO-92 package, which allows up to 550 mW power dissipation at 25°C ambient. Exceeding 15 mA risks exceeding junction temperature limits, especially above 85°C ambient.
Does LM4040EIZ-3.0/NOPB require an external capacitor for stability?
No, the LM4040EIZ-3.0/NOPB does not require an external capacitor for stability. Its internal architecture is designed to remain stable with any capacitive load, including up to 10 nF, eliminating the need for output bypassing or series resistance - a key advantage over older shunt references like TL431.
What is the thermal hysteresis specification for LM4040EIZ-3.0/NOPB?
The LM4040EIZ-3.0/NOPB has a thermal hysteresis of 0.08%, equivalent to ±2.4 mV at 3.0 V. This value represents the voltage difference measured at 25°C after cycling the device from −40°C to +125°C and back, confirming minimal memory effect in precision measurement applications.
Can LM4040EIZ-3.0/NOPB be used in automotive applications?
Yes, LM4040EIZ-3.0/NOPB is qualified for automotive use per AEC-Q100 Grade 3 (−40°C to +85°C) when ordered as LM4040-N-Q1 variant. While the LM4040EIZ-3.0/NOPB itself is industrial-grade, its TO-92 construction, 125°C max junction temperature, and tested reliability make it widely deployed in non-safety-critical automotive cabin modules.
What is the wideband noise performance of LM4040EIZ-3.0/NOPB?
The LM4040EIZ-3.0/NOPB delivers 35 μVrms wideband noise over 10 Hz to 10 kHz. This low-noise characteristic supports high-resolution data acquisition systems - for example, enabling effective 12-bit ADC performance even with minimal filtering in portable instrumentation designs.
LM4040EIZ-3.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Box
- Product Status:
- Obsolete
- 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:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4040EIZ-3.0/NOPB FAQ
1.How can I place an order for LM4040EIZ-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040EIZ-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 LM4040EIZ-3.0/NOPB reliable?
The price and inventory of LM4040EIZ-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 LM4040EIZ-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040EIZ-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040EIZ-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040EIZ-3.0/NOPB?
LM4040EIZ-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040EIZ-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 LM4040EIZ-3.0/NOPB?
For technical support, including LM4040EIZ-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040EIZ-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040EIZ-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040EIZ-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 LM4040EIZ-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040EIZ-3.0/NOPB?
All LM4040EIZ-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040EIZ-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 LM4040EIZ-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040EIZ-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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