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Texas Instruments LM4041D12ILPR
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- Part No.:
- LM4041D12ILPR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
LM4041D12ILPR.pdf
- Description:
- IC VREF SHUNT 1% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,982
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Product details
Overview
LM4041D12ILPR 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 instrumentation.
For engineers reviewing the LM4041D12ILPR datasheet, LM4041D12ILPR pinout, LM4041D12ILPR application, or LM4041D12ILPR equivalent, this page delivers verified specifications, package mapping, thermal and noise performance data, and real-world design context for low-power analog signal chains requiring stable 1.225 V reference voltage.
Technical Context
The LM4041D12ILPR operates as a two-terminal shunt reference: cathode sinks current while anode is grounded, enabling simple biasing in series with load or resistor-divider networks. Its Zener-zap trimmed reverse breakdown voltage ensures tight initial accuracy without external calibration.
It delivers stable regulation across –40°C to +85°C ambient, maintains low dynamic impedance (<2 Ω at 1 mA), and exhibits minimal output voltage drift versus cathode current (≤10 mV change over full 45 μA–12 mA range) - critical for battery-powered systems where supply headroom and load variation are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables direct replacement of legacy 1.2 V references in ADC/DAC biasing and sensor excitation circuits. |
| Initial Tolerance | ±1.0% max at 25°C (D grade); supports cost-sensitive industrial designs where ±1% accuracy suffices without premium A/B-grade pricing. |
| Temp Coefficient | 150 ppm/°C max over –40°C to +85°C; ensures ≤1.27 mV total drift across full industrial temperature range. |
| Noise (10 Hz–10 kHz) | 20 μVRMS typical; preserves SNR in 16-bit+ data acquisition systems without requiring external filtering. |
| Min Cathode Current | 45 μA typical; allows operation from ultra-low-power sources such as coin cells or energy-harvesting outputs. |
| Max Cathode Current | 12 mA; supports driving moderate loads (e.g., op-amp input stages or small logic buffers) directly from reference node. |
| Dynamic Impedance | ≤2 Ω at 1 mA; minimizes output voltage perturbation during transient load steps in closed-loop feedback paths. |
Pinout & Package
LM4041D12ILPR is packaged in a 3-pin SOT-23 (DBZ) surface-mount package with lead finish NiPdAu, RoHS-compliant, and MSL Level-1 rating. Anode (pin 2) is grounded; cathode (pin 1) carries shunt current and defines output voltage; pin 3 is no-connect and must float or connect to anode per TI ESD guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / output node | Connects to unregulated supply via series resistor; output voltage appears between cathode and ground (anode). |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; forms return path for cathode current and sets reference potential. |
| NC (Pin 3) | No-connect | Must remain floating or tied to anode (pin 2); avoids parasitic Schottky conduction in SOT-23 package. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates stably with any capacitive load (0–∞ F); eliminates need for output bypass capacitor in space-constrained PCB layouts. |
| Wide operating current range | Functional from 45 μA to 12 mA cathode current; accommodates both ultra-low-power sleep modes and active high-precision measurement phases. |
| Low thermal drift | 150 ppm/°C max tempco ensures <±10 mV error over full –40°C to +85°C range - suitable for outdoor or automotive under-hood applications. |
| ESD robustness | ±2000 V HBM rating; withstands handling and board-level assembly without special precautions beyond standard ESD protocols. |
Applications
| Power-Supply Monitor | Data-Acquisition System |
|---|---|
Use Scenario: Monitoring 3.3 V or 5 V rail integrity in industrial PLC I/O modules using comparator-based undervoltage detection. IC Role / Device Role / Timing Role: Provides stable 1.225 V threshold reference for comparator input; replaces resistive divider to eliminate ratio drift and improve long-term accuracy. Use Value: Enables ±1% trip-point accuracy over temperature and time, reducing false alarms and field returns in mission-critical control systems. | Use Scenario: Biasing the reference input of a 16-bit SAR ADC in portable environmental sensor nodes powered by Li-ion batteries. IC Role / Device Role / Timing Role: Supplies low-noise, low-drift reference voltage to ADC REF+ pin; operates continuously at 60 μA to extend battery life beyond 2 years. Use Value: Maintains ENOB ≥15.2 bits across –20°C to +70°C due to 20 μVRMS noise and 150 ppm/°C tempco - meeting Class I metrology requirements. |
| Process Control Transmitter | Battery-Powered Equipment |
Use Scenario: Setting precise 4–20 mA loop current in smart pressure transmitters with HART communication capability. IC Role / Device Role / Timing Role: Generates stable 1.225 V reference for DAC-controlled current source; shares ground with isolated microcontroller via optocoupler. Use Value: Ensures current output accuracy better than ±0.1% FS over 15-year product lifetime, satisfying SIL-2 functional safety validation. | Use Scenario: Providing reference voltage for analog front-end of handheld multimeter with auto-ranging and true RMS conversion. IC Role / Device Role / Timing Role: Delivers 1.225 V reference to dual-slope integrator and internal ADC; draws only 45 μA in standby mode. Use Value: Extends alkaline AA battery life to >500 hours of active use while maintaining 0.05% basic accuracy specification. |
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 2 mA min cathode current; 50 ppm/°C tempco; requires external resistors for 1.225 V setup. | Used in higher-voltage feedback loops (e.g., 12 V SMPS); less suitable for ultra-low-current 1.225 V biasing. | Select when existing design uses TL431 footprint and 2.5 V reference is acceptable; avoid if <100 μA supply current is required. |
| MAX6008AEUR+T | Fixed 1.25 V output; ±0.2% initial tolerance; 75 ppm/°C tempco; 35 μA min cathode current; SC70-3 package. | Higher accuracy and lower drift, but limited to 85°C operation and unavailable in extended-temp Q grade. | Choose for lab-grade instrumentation needing tighter specs; not recommended for automotive or extended-temperature industrial deployments. |
Compared with TL431ACLP and MAX6008AEUR+T, LM4041D12ILPR offers the lowest minimum operating current (45 μA), widest temperature range (–40°C to +85°C), and direct 1.225 V output - making it optimal for battery longevity and compatibility with legacy 1.2 V reference designs without resistor recalculations.
Availability
LM4041D12ILPR is available at Aetrix Electronics and suitable for power-supply monitors, data-acquisition systems, process control transmitters, and battery-powered equipment requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4041D12ILPR 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 broad distribution infrastructure.
The LM4041 series was designed specifically for cost-sensitive, space-constrained applications demanding micropower operation, low noise, and stable shunt reference performance - targeting portable instrumentation, industrial sensors, and energy-efficient power management.
FAQ
What is the maximum operating temperature range for LM4041D12ILPR?
The LM4041D12ILPR is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade range is confirmed in Section 3 (Description) and Table 5.4–5.5 of the TI datasheet SLCS146H. It does not support the extended –40°C to +125°C range offered by Q-grade variants like LM4041D12Q.
Does LM4041D12ILPR require an output capacitor for stability?
No, LM4041D12ILPR does not require an output capacitor. As stated in Section 7.1 and Feature list, it is stable with all capacitive loads and operates reliably with zero output capacitance - simplifying layout and reducing BOM count in compact designs.
What package type and pin configuration does LM4041D12ILPR use?
LM4041D12ILPR uses the 3-pin SOT-23 (DBZ) package. Pin 1 is Cathode (output), Pin 2 is Anode (ground), and Pin 3 is NC (no-connect), which must float or connect to Pin 2 per TI's ESD guidance in Figure 4-1 and Section 7.2.
How does the 150 ppm/°C temperature coefficient affect LM4041D12ILPR output voltage in practice?
At 1.225 V nominal output, a 150 ppm/°C max tempco results in ≤±1.27 mV total drift over the full –40°C to +85°C range. This is verified in Table 5.5 (LM4041D12I Electrical Characteristics) and Figure 5-1, ensuring predictable performance in uncontrolled thermal environments.
Can LM4041D12ILPR replace LM4041A12ILPR in an existing design?
Yes, LM4041D12ILPR is pin-compatible and functionally identical to LM4041A12ILPR except for relaxed initial tolerance (±1.0% vs ±0.1%) and higher tempco (150 ppm/°C vs 100 ppm/°C). It can be substituted where cost sensitivity outweighs ultra-high accuracy requirements.
LM4041D12ILPR 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:
- 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:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4041D12ILPR FAQ
1.How can I place an order for LM4041D12ILPR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041D12ILPR 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 LM4041D12ILPR reliable?
The price and inventory of LM4041D12ILPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041D12ILPR is usually 5 days.
3.What payment methods are accepted for LM4041D12ILPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041D12ILPR transactions.
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4.How is shipping managed for LM4041D12ILPR?
LM4041D12ILPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041D12ILPR 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 LM4041D12ILPR?
For technical support, including LM4041D12ILPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041D12ILPR requirements.
6.How does Aetrix verify that LM4041D12ILPR is sourced from the original manufacturer or authorized distributors?
All LM4041D12ILPR 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 LM4041D12ILPR meets industry standards.
7.What is the process for return or replacement of LM4041D12ILPR?
All LM4041D12ILPR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041D12ILPR, 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 LM4041D12ILPR part is unused and in its original packaging.
Return procedure for LM4041D12ILPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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