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Texas Instruments LM4041AIZ-1.2/NOPB
- Part No.:
- LM4041AIZ-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4041AIZ-1.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,431
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Product details
Overview
LM4041AIZ-1.2/NOPB from Texas Instruments is a precision 1.225 V shunt voltage reference in TO-92 package, rated for industrial temperature range (−40°C to +85°C), with ±0.1% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise (10 Hz–10 kHz). It serves as a stable voltage reference in high-accuracy analog signal chains for battery-powered instrumentation.
For engineers reviewing the LM4041AIZ-1.2/NOPB datasheet, LM4041AIZ-1.2/NOPB pinout, LM4041AIZ-1.2/NOPB application, or LM4041AIZ-1.2/NOPB equivalent, key selection criteria include reverse breakdown voltage accuracy over temperature, low operating current (60 μA min), capacitive load stability, thermal hysteresis (0.08%), and TO-92 mechanical compatibility in space-constrained legacy designs.
Technical Context
The LM4041AIZ-1.2/NOPB uses Zener-zap trimmed bandgap architecture with curvature correction to achieve ±0.1% initial accuracy and <100 ppm/°C drift over −40°C to +85°C. Its 3-pin TO-92 configuration places cathode (pin 2), anode (pin 3), and NC (pin 1) - where NC must float or connect to anode per EMI mitigation guidance.
It operates as a two-terminal shunt device requiring no output capacitor, tolerates any capacitive load, and maintains dynamic impedance of ≤1.5 Ω at 1 mA. The 1.225 V nominal reverse breakdown voltage is fixed (non-adjustable), and long-term stability is 120 ppm after 1000 hours at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; enables precise 1.2 V system biasing without external resistors |
| Initial Tolerance | ±0.1% at 25°C (±1.2 mV); supports high-resolution ADC/DAC reference design |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C; ensures <±0.012 V drift across full industrial range |
| Min Operating Current | 60 μA; allows ultra-low-power operation in energy-harvesting sensor nodes |
| Noise (10 Hz–10 kHz) | 20 μVRMS; minimizes added error in 16-bit+ data acquisition systems |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; provides stable regulation under varying load transients |
| Thermal Hysteresis | 0.08%; guarantees repeatable voltage after thermal cycling in field-deployed equipment |
Pinout & Package
LM4041AIZ-1.2/NOPB is supplied in TO-92 package (LP variant), with 4.30 mm × 4.30 mm body size and through-hole mounting. Pin 1 is NC (must float or tie to anode), Pin 2 is Cathode (shunt current path and output node), Pin 3 is Anode (typically grounded).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No-connect terminal | Must be left floating or connected to anode (Pin 3) to suppress EMI-induced errors near transformers or switching regulators |
| Pin 2 (Cathode) | Shunt current input / output node | Serves as both reference voltage output and current sink; connects to top of resistor divider or ADC reference input |
| Pin 3 (Anode) | Reference ground node | Typically tied to system ground; establishes return path for shunt current and defines 0 V reference point |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Eliminates BOM cost and layout area for stabilization cap; simplifies design validation |
| Capacitive load tolerance | Stable with any output capacitance (e.g., 10 nF bypass caps on ADC supplies), enabling robust noise filtering |
| Low 60 μA minimum current | Supports operation in micropower systems such as coin-cell IoT sensors and portable meters |
| 100 ppm/°C max tempco | Meets tight drift budgets in process control transmitters and precision thermocouple amplifiers |
| 0.08% thermal hysteresis | Ensures measurement repeatability after ambient temperature excursions in outdoor metering applications |
Applications
| Battery-Powered Equipment | Data-Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter with 200 mV–1000 V range and auto-ranging ADC. IC Role / Device Role / Timing Role: Provides 1.225 V precision reference for 24-bit sigma-delta ADC front-end. Use Value: Enables ±0.005% full-scale accuracy over −10°C to +50°C ambient without calibration. | Use Scenario: Industrial PLC analog input module measuring 4–20 mA current loops. IC Role / Device Role / Timing Role: Serves as stable shunt reference for op-amp-based I/V conversion and ADC biasing. Use Value: Maintains <±0.01% gain error across 85°C temperature swing during factory operation. |
| Instrumentation and Test Equipment | Energy Management/Metering |
Use Scenario: Benchtop power supply with programmable voltage/current limits and digital readback. IC Role / Device Role / Timing Role: Supplies reference for DAC-controlled feedback loop and voltage sense amplifier. Use Value: Delivers <10 ppm/°C effective drift, supporting 0.01% line regulation specification. | Use Scenario: Smart electricity meter with Class 0.2 accuracy per IEC 62053-21. IC Role / Device Role / Timing Role: Sets reference for metrology-grade ADC sampling voltage and current channels. Use Value: Contributes <±0.002% error budget to total meter accuracy over 10-year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4041CIZ-1.2/NOPB | ±0.5% initial tolerance (vs. ±0.1% for LM4041AIZ-1.2/NOPB); same TO-92 package and 100 ppm/°C max tempco | Suitable for cost-sensitive industrial sensors where ±0.05% absolute accuracy is acceptable | Select when BOM cost reduction outweighs need for highest-grade reference stability |
| TL431ACLP | Adjustable 2.5 V reference (via external resistors); higher 2.5 V nominal, 2 Ω typical ZOUT, and 100 ppm/°C tempco | Used where 2.5 V reference is preferred or adjustable output needed; requires two external resistors | Choose when system already uses TL431 footprint or needs programmable reference voltage |
Compared with LM4041CIZ-1.2/NOPB, the LM4041AIZ-1.2/NOPB delivers 5× tighter initial tolerance for metrology-critical stages; versus TL431ACLP, it offers fixed 1.225 V output with zero external components but lacks adjustability and has lower output voltage headroom.
Availability
LM4041AIZ-1.2/NOPB is available at Aetrix Electronics and suitable for battery-powered equipment, data-acquisition systems, and instrumentation requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4041AIZ-1.2/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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision analog ICs and industrial-grade components.
The LM4041-N series was designed specifically for high-accuracy, low-power shunt reference applications in space-constrained industrial and automotive systems, emphasizing stability, ease of use, and qualification across extended temperature ranges.
FAQ
What is the exact output voltage and tolerance of LM4041AIZ-1.2/NOPB at 25°C?
The LM4041AIZ-1.2/NOPB has a nominal reverse breakdown voltage of 1.225 V with ±0.1% initial tolerance at 25°C, corresponding to ±1.2 mV absolute error. This grade (A) is confirmed in TI's SNOS641I datasheet Section 5.5 for the LM4041AIZ variant in TO-92 (LP) package under industrial temperature conditions.
Does LM4041AIZ-1.2/NOPB require an external output capacitor for stability?
No, LM4041AIZ-1.2/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to large bypass capacitors used in ADC power domains. This eliminates capacitor-related phase margin concerns and reduces bill-of-materials count.
What is the minimum operating current for LM4041AIZ-1.2/NOPB, and how does it affect low-power designs?
The LM4041AIZ-1.2/NOPB specifies a minimum operating current of 60 μA at 25°C, enabling reliable operation in micropower applications such as battery-operated sensors and energy-harvesting nodes. At this current, output voltage remains within tolerance, and dynamic impedance stays below 1.5 Ω, preserving regulation integrity.
How is the TO-92 pinout configured for LM4041AIZ-1.2/NOPB, and what is the function of Pin 1?
LM4041AIZ-1.2/NOPB in TO-92 (LP) package has Pin 1 = NC (no-connect), Pin 2 = Cathode (output/shunt node), Pin 3 = Anode (ground). Pin 1 must either float or be connected to Pin 3 (anode) to mitigate EMI sensitivity - a requirement explicitly stated in TI's datasheet Figure 4-3 and Pin Functions table.
What is the thermal hysteresis specification for LM4041AIZ-1.2/NOPB, and why does it matter in field applications?
LM4041AIZ-1.2/NOPB exhibits 0.08% thermal hysteresis - the voltage difference measured at 25°C after cycling between −40°C and +125°C. This low hysteresis ensures repeatable reference performance in outdoor or thermally cycled environments like smart meters or automotive ECUs, where calibration drift must remain negligible over product lifetime.
LM4041AIZ-1.2/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):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 12 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4041AIZ-1.2/NOPB FAQ
1.How can I place an order for LM4041AIZ-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041AIZ-1.2/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 LM4041AIZ-1.2/NOPB reliable?
The price and inventory of LM4041AIZ-1.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041AIZ-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4041AIZ-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041AIZ-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041AIZ-1.2/NOPB?
LM4041AIZ-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041AIZ-1.2/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 LM4041AIZ-1.2/NOPB?
For technical support, including LM4041AIZ-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041AIZ-1.2/NOPB requirements.
6.How does Aetrix verify that LM4041AIZ-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4041AIZ-1.2/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 LM4041AIZ-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4041AIZ-1.2/NOPB?
All LM4041AIZ-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4041AIZ-1.2/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 LM4041AIZ-1.2/NOPB part is unused and in its original packaging.
Return procedure for LM4041AIZ-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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