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Texas Instruments LM4041DIZ-1.2/NOPB
- Part No.:
- LM4041DIZ-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4041DIZ-1.2/NOPB.pdf
- Description:
- IC VREF SHUNT 1% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:964
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Product details
Overview
LM4041DIZ-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 ±1.0% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise (10 Hz–10 kHz). It delivers stable reference voltage in low-power data-acquisition systems requiring high accuracy under varying load and temperature.
For engineers reviewing the LM4041DIZ-1.2/NOPB datasheet, LM4041DIZ-1.2/NOPB pinout, LM4041DIZ-1.2/NOPB application, or LM4041DIZ-1.2/NOPB equivalent, key selection criteria include reverse breakdown voltage tolerance over temperature, minimum operating current (60 μA), dynamic impedance (≤2 Ω), thermal hysteresis (0.08%), and compatibility with capacitive loads without external stabilization.
Technical Context
The LM4041DIZ-1.2/NOPB uses a bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its three-terminal TO-92 configuration operates as a two-terminal device when the anode is grounded, sinking current through the cathode to maintain precise 1.225 V across the load.
It achieves stability without output capacitance and tolerates arbitrary capacitive loading due to low dynamic impedance (<2 Ω) and inherent phase margin design. The device supports operation from 60 μA to 12 mA, enabling use in ultra-low-power sensor biasing and high-current precision DAC references alike.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal reverse breakdown voltage - sets absolute reference point for ADCs, comparators, and sensor excitation circuits |
| Initial Tolerance | ±12 mV (±1.0%) at 25°C - enables single-point calibration in cost-sensitive instrumentation |
| Temp Coefficient | ≤100 ppm/°C - ensures ≤±0.104 V drift over −40°C to +85°C ambient, critical for field-deployed metering |
| Min Operating Current | 60 μA - supports battery-powered designs with microamp-level sleep modes |
| Noise (10Hz–10kHz) | 20 μVRMS - minimizes quantization error in 16-bit+ data acquisition systems |
| Dynamic Impedance | ≤2 Ω - maintains voltage regulation under fast load transients up to 12 mA |
| Thermal Hysteresis | 0.08% - guarantees repeatability after thermal cycling in automotive cabin modules |
Pinout & Package
LM4041DIZ-1.2/NOPB uses a 3-pin TO-92 package (LP) with body size 4.30 mm × 4.30 mm. Pin 1 = Anode (grounded), Pin 2 = Cathode (shunt current path and output node), Pin 3 = NC (no connect, must float or tie to anode per EMI guidance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Must be connected to system ground; serves as return path for shunt current and defines output voltage reference point |
| Cathode (Pin 2) | Shunt output terminal | Delivers regulated 1.225 V to load; sinks all current not drawn by load - requires series resistor from supply |
| NC (Pin 3) | No-connect terminal | Internally unconnected; TI recommends floating or tying to anode in high-EMI environments near transformers or switching regulators |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained PCB layouts in handheld test equipment and IoT sensor nodes |
| Tolerates capacitive loads | Eliminates need for isolation resistors when driving ADC input caps or op-amp feedback networks |
| 60 μA minimum operating current | Supports direct connection to microcontroller GPIOs with weak pull-ups or ultra-low-IQ power management ICs |
| 100 ppm/°C max tempco | Meets Class 0.1 accuracy requirements for energy metering and process control loop references |
| 20 μVRMS noise (10Hz–10kHz) | Preserves effective resolution in 24-bit sigma-delta ADCs used in precision weigh scales and medical sensors |
Applications
| Battery-Powered Equipment | Data-Acquisition Systems |
|---|---|
|
Use Scenario: Portable multimeter with auto-ranging analog front-end powered by coin-cell battery. IC Role / Device Role / Timing Role: Shunt reference for 16-bit SAR ADC and comparator threshold setting. Use Value: 60 μA min current enables >1-year battery life; ±1.0% tolerance avoids factory recalibration. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Precision 1.225 V reference for 24-bit delta-sigma ADC and current-sense amplifier gain setting. Use Value: 100 ppm/°C tempco ensures <0.05% full-scale error across −40°C to +85°C cabinet temperatures. |
| Energy Metering | Automotive Electronics |
|
Use Scenario: DIN-rail mounted kWh meter with anti-tampering detection and metrology-grade accuracy. IC Role / Device Role / Timing Role: Primary voltage reference for polyphase energy measurement ASIC and tamper-detection comparators. Use Value: 0.08% thermal hysteresis prevents calibration drift after repeated thermal cycling during outdoor installation. |
Use Scenario: Cabin temperature sensor module in passenger vehicle HVAC control unit. IC Role / Device Role / Timing Role: Stable bias reference for thermistor signal conditioning and microcontroller ADC reference. Use Value: TO-92 package withstands reflow and mechanical stress; industrial temp range covers full vehicle operating envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040DIZ-1.2/NOPB | Higher initial tolerance (±2.0%), same TO-92 package and 1.225 V output | Suitable for non-critical biasing where cost is prioritized over metrology-grade accuracy | Select when ±2% reference error is acceptable and long-term stability is less critical than BOM cost |
| REF3012AIDBZR | Series reference (SOT-23), 1.2 V output, ±0.2% initial tolerance, higher quiescent current (45 μA typical) | Requires input voltage ≥1.4 V; not shunt-based - eliminates external series resistor but needs dedicated supply rail | Choose for ultra-low-noise (12 μVRMS) and tighter tolerance where board space allows SOT-23 and supply headroom exists |
Compared with LM4041DIZ-1.2/NOPB, LM4040DIZ-1.2/NOPB trades accuracy for lower cost in non-metrology roles, while REF3012AIDBZR offers superior precision and noise but demands series-regulator layout constraints and higher supply voltage - making LM4041DIZ-1.2/NOPB optimal for shunt-configured, space-limited, and battery-aware designs.
Availability
LM4041DIZ-1.2/NOPB is available at Aetrix Electronics and suitable for battery-powered equipment, data-acquisition systems, and energy metering applications requiring stable component supply, long-term calibration integrity, and industrial-temperature reliability.
Supply support for LM4041DIZ-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 specializing in analog and embedded processing technologies, with decades of expertise in precision reference design and automotive-qualified components.
The LM4041-N series was developed for space-constrained, low-power applications demanding high initial accuracy and robust thermal performance - especially in portable instrumentation, industrial sensing, and automotive subsystems where shunt topology simplifies supply design.
FAQ
What is the maximum operating current for LM4041DIZ-1.2/NOPB?
The LM4041DIZ-1.2/NOPB supports a maximum operating current of 12 mA. This rating ensures reliable operation under full-load conditions in precision DAC buffers and active filter bias networks. Exceeding 12 mA risks exceeding the device's power dissipation limit in the TO-92 package, particularly at elevated ambient temperatures. Always verify junction temperature using the specified thermal resistance (180°C/W for 0.4-in lead length) in worst-case power calculations.
Does LM4041DIZ-1.2/NOPB require an external capacitor for stability?
No, LM4041DIZ-1.2/NOPB does not require an external output capacitor for stability. Its internal design provides unconditional stability with any capacitive load, including direct connection to ADC input sampling capacitors or op-amp feedback networks. This eliminates layout sensitivity and reduces BOM count - a key advantage over older shunt references that mandate minimum output capacitance.
What is the thermal hysteresis specification for LM4041DIZ-1.2/NOPB?
The LM4041DIZ-1.2/NOPB has a thermal hysteresis of 0.08%, defined as the voltage difference measured at +25°C after cycling to −40°C versus after cycling to +125°C. This low hysteresis ensures repeatable reference performance in applications subject to repeated thermal cycling, such as outdoor energy meters or automotive cabin sensors, where calibration stability between seasonal temperature extremes is essential.
Can LM4041DIZ-1.2/NOPB be used in automotive applications?
The LM4041DIZ-1.2/NOPB is qualified for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 certified. For automotive applications requiring Grade 1 (−40°C to +125°C) qualification, TI offers the LM4041-N-Q1 series (e.g., LM4041QDIZ-1.2/NOPB). Using LM4041DIZ-1.2/NOPB in automotive contexts may require additional system-level validation and is not recommended for safety-critical or engine-bay locations.
What is the purpose of the NC pin on LM4041DIZ-1.2/NOPB?
Pin 3 of LM4041DIZ-1.2/NOPB is labeled NC (no connect) and is internally unconnected. TI recommends leaving it floating or connecting it to the anode (Pin 1) in high-EMI environments - for example, when placed near transformers or DC-DC converters - to reduce noise coupling into the reference node. This pin has no electrical function in standard operation but serves as an EMI mitigation option.
LM4041DIZ-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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- 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
LM4041DIZ-1.2/NOPB FAQ
1.How can I place an order for LM4041DIZ-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DIZ-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 LM4041DIZ-1.2/NOPB reliable?
The price and inventory of LM4041DIZ-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 LM4041DIZ-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4041DIZ-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DIZ-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DIZ-1.2/NOPB?
LM4041DIZ-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DIZ-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 LM4041DIZ-1.2/NOPB?
For technical support, including LM4041DIZ-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DIZ-1.2/NOPB requirements.
6.How does Aetrix verify that LM4041DIZ-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4041DIZ-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 LM4041DIZ-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4041DIZ-1.2/NOPB?
All LM4041DIZ-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DIZ-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 LM4041DIZ-1.2/NOPB part is unused and in its original packaging.
Return procedure for LM4041DIZ-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041DIZ-1.2/NOPB Tags
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