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Texas Instruments LM4040BIZ-4.1/NOPB
- Part No.:
- LM4040BIZ-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040BIZ-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,605
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Product details
Overview
LM4040BIZ-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in TO-92 package, delivering a fixed 4.096 V reverse breakdown voltage with ±0.2% initial tolerance (B grade) at 25°C, 68 μA minimum operating current, and 100 ppm/°C max temperature coefficient - used for high-accuracy ADC/DAC biasing and sensor excitation in industrial field transmitters.
For engineers reviewing the LM4040BIZ-4.1/NOPB datasheet, LM4040BIZ-4.1/NOPB pinout, LM4040BIZ-4.1/NOPB application, or LM4040BIZ-4.1/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 3 qualification (−40°C to +85°C), no-output-capacitor requirement, stable operation with capacitive loads, and compatibility with low-current precision analog signal chains.
Technical Context
The LM4040BIZ-4.1/NOPB employs a Zener-zap trimmed bandgap architecture with curvature-corrected temperature drift compensation, enabling stable 4.096 V output across −40°C to +85°C. Its low dynamic impedance (≤0.8 Ω at 1 mA) and 35 μVrms wideband noise (10 Hz–10 kHz) support high-resolution data acquisition systems.
It operates as a two-terminal shunt device requiring only an external current-limiting resistor, with cathode as the output node and anode grounded. The TO-92 package provides 550 mW power dissipation capability and 170°C/W thermal resistance (0.125″ lead length), suitable for space-constrained industrial PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage, fixed and factory-trimmed - enables direct interface with 12-bit ADC references without scaling. |
| Initial Tolerance | ±0.2% at 25°C (B grade) - ensures ≤±8.2 mV absolute error before temperature or load effects. |
| Temp Coefficient | ≤100 ppm/°C (max) over −40°C to +85°C - contributes ≤±33.6 mV drift across full industrial range. |
| Min Operating Current | 68 μA at 25°C - allows ultra-low-power operation in battery-backed sensor nodes. |
| Max Operating Current | 15 mA - supports robust regulation under varying load conditions without external buffering. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - minimizes added uncertainty in precision measurement front-ends. |
| Dynamic Impedance | ≤0.8 Ω at 1 mA - maintains voltage stability against fast load transients in analog input modules. |
Pinout & Package
LM4040BIZ-4.1/NOPB uses a 3-pin TO-92 package (body size 4.30 mm × 4.30 mm) with axial leads. Pin 1 is Cathode (output), Pin 2 is Anode (ground), and Pin 3 is NC (no connect, must float or tie to anode per EMI guidance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / output node | Delivers regulated 4.096 V when reverse-biased; connects to load and current-setting resistor. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; serves as return path for shunt current. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; TI recommends floating or tying to Pin 2 in high-EMI environments. |
Key Features
| Feature | Design Value |
|---|---|
| Zener-zap voltage trim | Ensures ±0.2% initial accuracy at 25°C without post-package calibration - reduces test time and BOM cost. |
| No output capacitor required | Stable operation with zero external capacitance - simplifies layout and eliminates capacitor aging/tolerance risks. |
| Capacitive load tolerance | Maintains regulation with any value of output capacitance - enables direct connection to ADC sample-and-hold inputs. |
| AEC-Q100 Grade 3 qualified | Validated for −40°C to +85°C operation in automotive subsystems - supports infotainment and body control modules. |
| Low micropower operation | 68 μA minimum current enables use in energy-harvesting and 4–20 mA loop-powered devices. |
Applications
| Field Transmitter Calibration | Industrial Analog Input Module |
|---|---|
Use Scenario: 4–20 mA current-loop transmitter with RTD or strain gauge sensor feeding a 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Precision shunt reference providing excitation voltage and ADC reference simultaneously. Use Value: 4.096 V output matches 12-bit full-scale binary (212 = 4096), eliminating scaling errors and enabling LSB-level accuracy. |
Use Scenario: Modular PLC analog input card accepting ±10 V, 0–10 V, and 4–20 mA signals with programmable gain instrumentation amplifiers. IC Role / Device Role / Timing Role: Stable reference for PGA gain-setting DACs and ADC internal reference buffers. Use Value: 100 ppm/°C tempco and 35 μVrms noise ensure <0.01% total unadjusted error across operating temperature. |
| Energy Infrastructure Metering | Automotive Battery Monitoring Unit |
Use Scenario: Revenue-grade electricity meter with polyphase energy measurement ASIC requiring calibrated voltage reference for metrology ADCs. IC Role / Device Role / Timing Role: Primary shunt reference for metrology-grade 24-bit delta-sigma converters. Use Value: Long-term stability (120 ppm @ 1000 hrs) and thermal hysteresis (0.08%) preserve calibration integrity over 10+ year field life. |
Use Scenario: 12 V battery monitoring system in ADAS domain controller measuring cell voltages and pack current via isolated shunt amplifiers. IC Role / Device Role / Timing Role: Reference for isolated ADCs measuring high-side battery voltage and auxiliary rail monitors. Use Value: AEC-Q100 Grade 3 qualification and −40°C to +85°C operation guarantee reliability in under-hood environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050B41IDBZR | Same 4.096 V output and ±0.2% initial tolerance, but SOT-23 package (smaller footprint, higher thermal resistance). | Preferred for space-constrained PCBs; less suitable for high-power dissipation due to 306 mW max vs. TO-92's 550 mW. | Select TL4050B41IDBZR when board area is critical and thermal load remains below 200 mW. |
| REF43G41IDR | Series reference (not shunt); 4.096 V output, ±0.05% initial tolerance, higher cost, requires input voltage ≥5.5 V. | Used where supply headroom permits and ultra-high accuracy justifies added complexity and cost. | Choose REF43G41IDR only when ±0.05% tolerance and lower 3.5 ppm/°C tempco are mandatory for metrology-grade designs. |
Compared with TL4050B41IDBZR, LM4040BIZ-4.1/NOPB offers higher power handling and simpler thermal management in TO-92; versus REF43G41IDR, it trades absolute accuracy for lower cost, zero quiescent current dependency, and direct shunt topology compatibility with 4–20 mA loops.
Availability
LM4040BIZ-4.1/NOPB is available at Aetrix Electronics and suitable for industrial field transmitters, energy infrastructure metering, and automotive battery monitoring systems requiring stable component supply with long lifecycle visibility.
Supply support for LM4040BIZ-4.1/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-qualified components.
LM4040BIZ-4.1/NOPB belongs to the LM4040-N precision micropower shunt reference product line, engineered for high-accuracy, low-drift voltage referencing in space- and power-constrained industrial and automotive signal chains.
FAQ
What is the operating temperature range for LM4040BIZ-4.1/NOPB?
The LM4040BIZ-4.1/NOPB is rated for −40°C to +85°C (Industrial Grade 3), fully qualified to AEC-Q100 standards. Its electrical characteristics - including ±0.2% initial tolerance and ≤100 ppm/°C temperature coefficient - are guaranteed across this full range, making it suitable for harsh industrial and automotive cabin environments.
Does LM4040BIZ-4.1/NOPB require an external output capacitor?
No, LM4040BIZ-4.1/NOPB does not require an external output capacitor for stability. Its internal design ensures unconditional stability even with large capacitive loads - a key advantage over older shunt references that mandate minimum output capacitance. This simplifies layout and improves reliability in analog input circuits.
What is the minimum cathode current needed for LM4040BIZ-4.1/NOPB to regulate properly?
The LM4040BIZ-4.1/NOPB requires a minimum cathode current of 68 μA at 25°C to maintain regulation within specification. At temperature extremes (−40°C or +85°C), this increases to 70 μA. Designers must size the series current-limiting resistor to ensure this current is met under worst-case input voltage and load conditions.
How does the TO-92 package of LM4040BIZ-4.1/NOPB affect thermal performance?
The TO-92 package delivers 550 mW maximum power dissipation with 170°C/W junction-to-ambient thermal resistance (0.125″ lead length). This allows LM4040BIZ-4.1/NOPB to operate reliably at up to 15 mA load current without heatsinking - significantly higher than SOT-23 alternatives - making it ideal for moderate-power analog front-ends.
Is LM4040BIZ-4.1/NOPB pin-compatible with other LM4040 variants?
Yes, all LM4040-N variants in TO-92 (e.g., LM4040AIZ-4.1, LM4040CIZ-4.1) share identical pinout and mechanical footprint. The LM4040BIZ-4.1/NOPB can be substituted for other TO-92 versions without PCB changes, though designers must verify tolerance grade (±0.1%/±0.2%/±0.5%), temperature range, and long-term stability requirements match the application.
LM4040BIZ-4.1/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4040BIZ-4.1/NOPB FAQ
1.How can I place an order for LM4040BIZ-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIZ-4.1/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 LM4040BIZ-4.1/NOPB reliable?
The price and inventory of LM4040BIZ-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BIZ-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040BIZ-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIZ-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIZ-4.1/NOPB?
LM4040BIZ-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIZ-4.1/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 LM4040BIZ-4.1/NOPB?
For technical support, including LM4040BIZ-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIZ-4.1/NOPB requirements.
6.How does Aetrix verify that LM4040BIZ-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040BIZ-4.1/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 LM4040BIZ-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040BIZ-4.1/NOPB?
All LM4040BIZ-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIZ-4.1/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 LM4040BIZ-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4040BIZ-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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