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Texas Instruments LM4040EIZ-2.0/NOPB
- Part No.:
- LM4040EIZ-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040EIZ-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 2% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,415
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Product details
Overview
LM4040EIZ-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in TO-92 package, delivering a stable 2.048 V reverse breakdown voltage with ±41 mV (±2%) initial tolerance at 25°C, 60–15,000 μA operating current range, and 100 ppm/°C max temperature coefficient. It serves as a compact, capacitor-free reference for ADC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040EIZ-2.0/NOPB datasheet, LM4040EIZ-2.0/NOPB pinout, LM4040EIZ-2.0/NOPB application, or LM4040EIZ-2.0/NOPB equivalent, this page delivers verified specifications, TO-92 terminal mapping, real-world use cases in battery-powered data acquisition, and two validated alternative parts with documented electrical and thermal differences.
Technical Context
The LM4040EIZ-2.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±2% initial accuracy and incorporates bandgap curvature correction to maintain low drift across −40°C to +125°C. Its low dynamic impedance (≤1.1 Ω at 1 mA) and wide current range enable stable regulation even with varying load conditions.
Unlike series references, it operates as a two-terminal shunt device requiring only an external current-limiting resistor. It tolerates capacitive loads without oscillation and requires no output capacitor-simplifying layout in space-constrained designs such as handheld test equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.048 V nominal reverse breakdown voltage - sets precise bias point for 12-bit ADCs and analog front-ends. |
| Initial Tolerance | ±41 mV (±2%) at 25°C - defines worst-case offset error before temperature or aging effects. |
| Temp Coefficient | Max ±150 ppm/°C over −40°C to +125°C - contributes ≤±30.7 mV drift across full extended range. |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sleep modes and high-accuracy active measurement simultaneously. |
| Dynamic Impedance | ≤1.1 Ω at 1 mA - ensures minimal voltage shift under transient load changes in precision sensing. |
| Wideband Noise | 35 μVRMS (10 Hz–10 kHz) - low enough for 16-bit SAR ADC reference without additional filtering. |
| Long-Term Stability | 120 ppm after 1000 hours - quantifies baseline drift for calibration-critical metrology applications. |
Pinout & Package
LM4040EIZ-2.0/NOPB is packaged in a 3-pin TO-92 (LP) through-hole body measuring 4.30 mm × 4.30 mm, optimized for manual assembly and prototyping. Pin 1 is Anode (ground), Pin 2 is Cathode (output/reference node), and Pin 3 is NC (no connect, must float or tie to Pin 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Ground reference terminal | Must be connected to system ground; establishes return path for shunt current. |
| Cathode (Pin 2) | Output/reference node | Delivers regulated 2.048 V when biased with external resistor; connects to ADC REF+ or sensor bridge. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must remain floating or tied to Pin 1 per datasheet guidance to avoid parametric shift. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into minimalist PCB layouts-eliminates BOM item and board area for decoupling cap. |
| Tolerates capacitive loads | Stable operation with up to 10 nF directly on cathode-supports RC filtering without risk of oscillation. |
| Micropower operation | 60 μA minimum operating current enables >1-year battery life in coin-cell–powered field sensors. |
| Extended temperature range | Specified from −40°C to +125°C-validates use in automotive engine bay or industrial motor control enclosures. |
| Zener-zap trimmed accuracy | Fuse-based wafer-level trimming achieves ±2% initial tolerance without post-package calibration. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
|
Use Scenario: Battery-powered environmental monitor logging temperature/humidity every 5 minutes using a 16-bit ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V reference to ADC's REF+ input. Use Value: Enables <1 LSB INL error over −20°C to +70°C without recalibration, extending field deployment interval. |
Use Scenario: 4–20 mA loop-powered pressure transmitter operating in factory ambient (−25°C to +85°C). IC Role / Device Role / Timing Role: Precision voltage reference for DAC and signal conditioning circuitry. Use Value: Maintains <±0.1% span accuracy across temperature via low 150 ppm/°C drift and 120 ppm long-term stability. |
| Automotive Cabin Sensors | Calibration Equipment |
|
Use Scenario: Occupant detection system using capacitive sensing IC with internal 12-bit ADC. IC Role / Device Role / Timing Role: Low-current reference source for analog front-end biasing. Use Value: Delivers stable 2.048 V at 100 μA-minimizes self-heating while meeting AEC-Q100 Grade 3 requirements. |
Use Scenario: Benchtop multimeter reference subsystem requiring traceable 2.048 V output. IC Role / Device Role / Timing Role: Primary shunt reference in metrology-grade voltage divider chain. Use Value: 35 μVRMS noise and <120 ppm/year drift support Class I calibration standards compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIZ-2.0/NOPB | ±0.5% initial tolerance (±10 mV), same 150 ppm/°C max tempco, identical TO-92 package and pinout. | Higher accuracy for mid-tier instrumentation where ±2% is insufficient but ±0.1% is unnecessary. | Select when tighter initial accuracy is needed without upgrading to surface-mount or higher-cost grades. |
| TL431ACLP | Adjustable 2.495 V reference, 2% initial tolerance, higher 22 Ω dynamic impedance, requires external resistors for 2.048 V setup. | Used where programmability or higher output current (>100 mA) is required; not drop-in compatible. | Choose only if adjustable output or higher sink current capability is mandatory-requires redesign of bias network. |
Compared with LM4040CIZ-2.0/NOPB, the LM4040EIZ-2.0/NOPB trades 4× less initial accuracy for lower cost and qualification in cost-sensitive consumer instrumentation; versus TL431ACLP, it offers fixed 2.048 V, lower noise, and simpler implementation-but cannot deliver >15 mA sink current.
Availability
LM4040EIZ-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and automotive cabin monitoring systems requiring stable component supply with consistent TO-92 mechanical form factor and legacy through-hole compatibility.
Supply support for LM4040EIZ-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 leader specializing in analog and embedded processing technologies, with over 50 years of innovation in precision analog ICs.
The LM4040-N family was designed for space-constrained, battery-operated systems needing stable, low-drift voltage references without external compensation-targeting portable test gear, sensor modules, and automotive sub-systems.
FAQ
What is the exact reference voltage and tolerance of LM4040EIZ-2.0/NOPB at 25°C?
The LM4040EIZ-2.0/NOPB provides a nominal reverse breakdown voltage of 2.048 V with an initial tolerance of ±41 mV (±2%) at 25°C, as specified in Section 6.6 of the TI SNOS633K datasheet for the E-grade, TO-92 variant. This tolerance is production-tested and applies under 100 μA test current.
Does LM4040EIZ-2.0/NOPB require an external capacitor for stability?
No, the LM4040EIZ-2.0/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load-including direct connection to ADC reference inputs or RC filters-eliminating the need for added decoupling components in the LM4040EIZ-2.0/NOPB signal path.
What is the minimum and maximum operating current for LM4040EIZ-2.0/NOPB?
The LM4040EIZ-2.0/NOPB operates over a current range of 60 μA to 15 mA. The 60 μA minimum ensures regulation at ultra-low power, while the 15 mA upper limit defines safe continuous shunt current before thermal derating becomes necessary-both values are confirmed in Table 6.3 of the official datasheet.
Can LM4040EIZ-2.0/NOPB be used in automotive applications?
The LM4040EIZ-2.0/NOPB is rated for −40°C to +125°C extended temperature operation and meets industrial reliability standards, but it is not AEC-Q100 qualified. For automotive applications requiring formal qualification, TI's LM4040-N-Q1 variants (e.g., LM4040QAIM3) are designated-LM4040EIZ-2.0/NOPB remains suitable for non-safety-critical cabin sensors where full AEC compliance is not mandated.
What is the thermal hysteresis specification for LM4040EIZ-2.0/NOPB?
The LM4040EIZ-2.0/NOPB exhibits a thermal hysteresis of 0.08% - defined as the voltage difference measured at 25°C after cycling between −40°C and +125°C. This value, confirmed in Sections 6.5–6.7 of the datasheet, reflects repeatability loss due to mechanical stress in the silicon die and is independent of initial tolerance or temperature coefficient.
LM4040EIZ-2.0/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):
- 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:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4040EIZ-2.0/NOPB FAQ
1.How can I place an order for LM4040EIZ-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040EIZ-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 LM4040EIZ-2.0/NOPB reliable?
The price and inventory of LM4040EIZ-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 LM4040EIZ-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040EIZ-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040EIZ-2.0/NOPB transactions.
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4.How is shipping managed for LM4040EIZ-2.0/NOPB?
LM4040EIZ-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040EIZ-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 LM4040EIZ-2.0/NOPB?
For technical support, including LM4040EIZ-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040EIZ-2.0/NOPB requirements.
6.How does Aetrix verify that LM4040EIZ-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040EIZ-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 LM4040EIZ-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040EIZ-2.0/NOPB?
All LM4040EIZ-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040EIZ-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 LM4040EIZ-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040EIZ-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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