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Texas Instruments LM4041DILPR
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- Part No.:
- LM4041DILPR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
LM4041DILPR.pdf
- Description:
- IC VREF SHUNT ADJ 1% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,977
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Product details
Overview
LM4041DILPR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±1.0% initial tolerance (D grade), 150 ppm/°C max temperature coefficient, 20 μVRMS wideband noise, and stable operation from 45 μA to 12 mA cathode current - used in high-accuracy power-supply monitors and portable data-acquisition systems.
For engineers reviewing the LM4041DILPR datasheet, LM4041DILPR pinout, LM4041DILPR application, or LM4041DILPR equivalent, this page delivers verified specifications, SOT-23-3 pin mapping, industrial-temperature (–40°C to +85°C) performance data, and real-world substitution guidance for precision analog design.
Technical Context
The LM4041DILPR implements a Zener-zap trimmed shunt reference architecture with low dynamic impedance (≤2 Ω at 1 mA) and no requirement for external stabilization capacitors. Its feedback pin (FB) is absent in the fixed-output variant, simplifying circuit integration while retaining low-noise regulation across full operating current range.
It operates as a two-terminal device (anode grounded, cathode supplying reference voltage) with reverse breakdown behavior, enabling flexible placement in series or shunt configurations. The D-grade version trades tighter tolerance for cost efficiency in applications where ±1.0% initial accuracy and 150 ppm/°C drift are acceptable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables direct replacement of legacy 1.2 V references without resistor divider redesign. |
| Initial Tolerance | ±1.0% max at 25°C (D grade); defines worst-case DC offset in calibration-critical signal chains. |
| Tempco | 150 ppm/°C max over –40°C to +85°C; contributes ≤1.2 mV drift across full industrial temperature range. |
| Noise (10 Hz–10 kHz) | 20 μVRMS typical; supports high-resolution ADCs (e.g., 16-bit+ SAR) without added filtering. |
| Operating Current | 45 μA min to 12 mA max cathode current; allows ultra-low-power sensor nodes and robust high-current monitoring. |
| Dynamic Impedance | ≤2 Ω at 1 mA (full temp range); ensures <2 mV load regulation error for 2 mA load transients. |
| Long-Term Stability | 120 ppm after 1000 h; predicts minimal drift in battery-powered metering equipment over multi-year deployment. |
Pinout & Package
LM4041DILPR is packaged in a 3-pin SOT-23 (DBZ) surface-mount package with JEDEC-standard pinout and RoHS-compliant NiPdAu lead finish. Thermal resistance θJA = 206°C/W enables operation up to 85°C ambient without heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink and output node | Connects to regulated voltage rail; supplies reference voltage and sinks all cathode current (IZ). |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms the 1.225 V potential difference with cathode. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to anode per TI EMI mitigation guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Operates stably with any capacitive load (0–∞), eliminating BOM cost and layout area for bypass caps. |
| Micropower start-up | Regulates correctly at 45 μA cathode current - enables use in energy-harvesting and coin-cell-powered systems. |
| Low thermal drift | 150 ppm/°C max tempco ensures ≤12 mV total drift over –40°C to +85°C, critical for field-deployed instrumentation. |
| High ESD robustness | ±2000 V HBM rating protects against assembly-line and field handling damage without external clamping. |
| Wide cathode current range | Supports both ultra-low-power (45 μA) and high-accuracy (10 mA) modes in same footprint - simplifies design reuse. |
Applications
| Power-Supply Monitor | Data-Acquisition System |
|---|---|
Use Scenario: Monitoring 3.3 V or 5 V rails in industrial PLC modules for brown-out detection and fault logging. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V threshold to comparator input for precise undervoltage lockout. Use Value: ±1.0% tolerance ensures trip point remains within 13 mV of target, preventing nuisance shutdowns under line variation. |
Use Scenario: Biasing front-end amplifiers and ADC reference inputs in handheld multimeters and environmental sensors. IC Role / Device Role / Timing Role: Precision voltage reference establishing absolute scaling for 16-bit analog-to-digital conversion. Use Value: 20 μVRMS noise and 150 ppm/°C drift preserve ENOB >14.5 bits across operating temperature range. |
| Process Control Transmitter | Battery-Powered Equipment |
Use Scenario: Providing excitation and reference for 4–20 mA loop-powered pressure/temperature transmitters. IC Role / Device Role / Timing Role: Two-terminal shunt regulator sourcing stable bias from loop current while consuming minimal headroom. Use Value: 45 μA minimum cathode current enables operation down to 3.2 V supply with 200 Ω loop burden. |
Use Scenario: Reference for fuel gauging ICs and low-power microcontrollers in medical wearables and IoT trackers. IC Role / Device Role / Timing Role: Micropower voltage reference maintaining accuracy during sleep-mode operation with intermittent wake-ups. Use Value: 120 ppm long-term stability ensures battery SOC estimation remains within ±0.5% error over 2-year product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACLP | Adjustable 2.495 V output, higher 100 μA min cathode current, ±1% tolerance, 50 ppm/°C tempco | Requires external resistor divider; better suited for 3.3 V/5 V regulation but incompatible with 1.225 V fixed-point designs | Select when adjustable output and tighter tempco justify added components and higher quiescent current. |
| MAX6008AEUR+T | Fixed 1.25 V output, ±0.2% tolerance, 75 ppm/°C tempco, SC70-3 package, 60 μA min current | Higher accuracy and lower drift, but incompatible pinout and stricter minimum current limit | Choose for metrology-grade applications where 0.2% tolerance and 75 ppm/°C are mandatory and layout revision is feasible. |
Compared with TL431ACLP and MAX6008AEUR+T, LM4041DILPR offers the only SOT-23-3 fixed 1.225 V solution with sub-100 μA start-up capability - making it uniquely suitable for space-constrained, ultra-low-power industrial sensing nodes requiring exact 1.225 V referencing.
Availability
LM4041DILPR is available at Aetrix Electronics and suitable for power-supply monitors, data-acquisition systems, and battery-powered equipment requiring stable component supply across industrial temperature ranges and multi-year production cycles.
Supply support for LM4041DILPR 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 high-volume manufacturing reliability.
The LM4041 family was engineered for cost-sensitive, space-constrained applications demanding micropower operation and stable DC voltage references - particularly in portable instrumentation, industrial monitoring, and automotive subsystems.
FAQ
What is the operating temperature range for LM4041DILPR?
The LM4041DILPR is characterized for industrial operation from –40°C to +85°C. This range is validated per TI's LM4041xI specification tables and applies to all electrical parameters including tolerance, tempco, and noise performance - ensuring reliable function in factory automation and outdoor metering environments.
Does LM4041DILPR require an output capacitor?
No, LM4041DILPR does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads, including 0 μF. Adding a capacitor may reduce high-frequency noise but is never necessary for loop stability - simplifying layout and reducing BOM count.
What is the minimum cathode current needed for LM4041DILPR to regulate?
The LM4041DILPR requires a minimum cathode current of 45 μA (typical) to maintain regulation at 25°C, rising to 80 μA across the full –40°C to +85°C range. This value is specified in Section 5.4 of the TI datasheet and defines the lowest usable current for battery-backed or energy-harvesting applications.
How does the LM4041DILPR differ from the adjustable LM4041 variants?
LM4041DILPR is the fixed 1.225 V output version with no FB pin; it uses pins 1 (cathode), 2 (anode), and 3 (NC). Adjustable variants (e.g., LM4041BIDBZR) include a dedicated FB pin for resistor-divider programming and support outputs from 1.225 V to 10 V - requiring different pinout and external components.
Is LM4041DILPR RoHS compliant and lead-free?
Yes, LM4041DILPR is RoHS compliant and features a lead-free NiPdAu (nickel-palladium-gold) or Sn (tin) lead finish, as confirmed in TI's PACKAGE OPTION ADDENDUM. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and supports standard Pb-free reflow profiles up to 260°C peak.
LM4041DILPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Series:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.233V
- Voltage - Output (Max):
- 10 V
- 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:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4041DILPR FAQ
1.How can I place an order for LM4041DILPR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DILPR 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 LM4041DILPR reliable?
The price and inventory of LM4041DILPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DILPR is usually 5 days.
3.What payment methods are accepted for LM4041DILPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DILPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DILPR?
LM4041DILPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DILPR 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 LM4041DILPR?
For technical support, including LM4041DILPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DILPR requirements.
6.How does Aetrix verify that LM4041DILPR is sourced from the original manufacturer or authorized distributors?
All LM4041DILPR 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 LM4041DILPR meets industry standards.
7.What is the process for return or replacement of LM4041DILPR?
All LM4041DILPR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DILPR, 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 LM4041DILPR part is unused and in its original packaging.
Return procedure for LM4041DILPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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