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Texas Instruments LM4041C12ILPR
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- Part No.:
- LM4041C12ILPR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
LM4041C12ILPR.pdf
- Description:
- IC VREF SHUNT 0.5% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,394
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Product details
Overview
LM4041C12ILPR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, 20 μVRMS wideband noise, and stable operation from 45 μA to 12 mA cathode current. It serves as a compact, low-drift voltage reference in high-accuracy analog signal chains and portable power monitoring circuits.
For engineers reviewing the LM4041C12ILPR datasheet, LM4041C12ILPR pinout, LM4041C12ILPR application, or LM4041C12ILPR equivalent, key selection criteria include its SC-70-5 package, industrial temperature range (–40°C to +85°C), no-output-capacitor stability, and compatibility with capacitive loads up to 1 μF without oscillation risk.
Technical Context
The LM4041C12ILPR implements a Zener-based shunt reference architecture trimmed via Zener-zap during wafer sort to achieve ±0.5% output tolerance at 25°C. Its dynamic impedance remains ≤1.5 Ω at 1 mA, enabling tight regulation under varying load currents.
It operates as a two-terminal device (anode grounded, cathode supplying reference voltage) with no internal feedback loop-output voltage is set solely by internal Zener breakdown characteristics. The SC-70-5 package includes an NC pin (Pin 4) and FB pin (Pin 5), though FB is unused in the fixed 1.225 V variant (LM4041C12ILPR).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables direct replacement of 1.2 V references in ADC/DAC biasing without external resistors. |
| Initial Tolerance | ±0.5% at 25°C (C grade); ensures ≤6.1 mV absolute error in precision sensor excitation or calibration circuits. |
| Temp Coefficient | ≤100 ppm/°C over –40°C to +85°C; contributes ≤10.4 mV drift across full industrial range, critical for metering accuracy. |
| Noise (10 Hz–10 kHz) | 20 μVRMS; supports 16-bit+ resolution in data-acquisition systems without added filtering. |
| Cathode Current Range | 45 μA (min) to 12 mA (max); allows use in ultra-low-power IoT sensors and higher-current supply monitors. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; maintains <1.5 mV output shift per 1 mA load change, improving PSRR in noisy environments. |
| Capacitive Load Stability | Stable with all capacitive loads (0–1 μF); eliminates need for output capacitor, reducing BOM count and board space. |
Pinout & Package
LM4041C12ILPR is packaged in a 5-pin SC-70 (DCK) package with 0.65 mm pitch, footprint-compatible with SOT-23 but offering dedicated NC and FB pins for adjustable variants. Pin 1 = Anode (ground), Pin 2 = NC, Pin 3 = Cathode (output), Pin 4 = NC, Pin 5 = FB (not connected in fixed-voltage version).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Ground reference terminal | Must be connected to system ground; forms return path for cathode current and defines reference potential. |
| Pin 2 (NC) | No-connect terminal | Internally unconnected; must remain floating or tied to Pin 1 per TI EMI mitigation guidance. |
| Pin 3 (Cathode) | Shunt output terminal | Delivers regulated 1.225 V; sinks total current (load + reference bias) and sets operating point via external series resistor. |
| Pin 4 (NC) | No-connect terminal | Internally unconnected; no electrical function; leave unconnected on PCB. |
| Pin 5 (FB) | Feedback input | Unused in LM4041C12ILPR; internally tied off; must float or connect to Pin 1 if EMI is present near transformers or switching nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.225 V output | Eliminates external resistor divider, reducing component count and layout sensitivity in space-constrained designs. |
| 45 μA minimum cathode current | Enables operation in battery-powered devices with sleep currents below 50 μA, extending shelf life. |
| Stable with all capacitive loads | Removes requirement for output bypass capacitor, simplifying design validation and improving reliability in humid or high-vibration environments. |
| 100 ppm/°C tempco (max) | Meets Class 0.5 accuracy requirements for energy metering standards (e.g., IEC 62053-21) over full industrial range. |
| SC-70-5 package | 0.8 mm × 2.0 mm footprint saves >30% board area vs. SOT-23 while maintaining hand-solderability and reflow compatibility. |
Applications
| Energy Metering | Data-Acquisition Systems |
|---|---|
Use Scenario: High-accuracy polyphase electricity meters requiring stable reference for 24-bit delta-sigma ADCs and metrology SoCs. IC Role / Device Role / Timing Role: Shunt voltage reference providing 1.225 V基准 for ADC internal gain stages and sensor signal conditioning. Use Value: ±0.5% tolerance and 100 ppm/°C tempco ensure <0.2% total measurement error across –25°C to +70°C ambient, meeting IEC 62053-22 Class 0.5 compliance. | Use Scenario: Portable handheld multimeters and oscilloscope front-ends needing low-noise, low-drift reference for autoranging and offset calibration. IC Role / Device Role / Timing Role: Primary voltage reference for programmable gain instrumentation amplifiers and SAR ADC drivers. Use Value: 20 μVRMS noise enables true 16-bit ENOB at 100 kSPS without oversampling, while 45 μA min current supports battery operation >100 hours. |
| Power-Supply Monitors | Battery-Powered Equipment |
Use Scenario: Industrial PLC I/O modules monitoring 24 V DC rails for brownout detection and fault logging. IC Role / Device Role / Timing Role: Precision shunt reference feeding comparator inputs in rail supervision circuits. Use Value: Stable 1.225 V output ensures ±10 mV trip-point accuracy over temperature, eliminating false triggers during thermal cycling. | Use Scenario: Wireless sensor nodes (LoRaWAN/NB-IoT) with coin-cell batteries requiring ultra-low-quiescent reference for MCU ADC and voltage monitoring. IC Role / Device Role / Timing Role: System-level voltage reference for battery voltage sensing, temperature compensation, and wake-up threshold generation. Use Value: 45 μA minimum cathode current allows direct connection to 3.3 V rail via 47 kΩ series resistor, achieving <1 μA total standby current when paired with low-leakage MCU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4041C12IDCKR | Same SC-70-5 package, identical electrical specs, but reel quantity 3000 vs. 250 for LM4041C12ILPR. | Identical functional performance; differs only in packaging format (large vs. small tape-and-reel). | Select LM4041C12IDCKR for high-volume production; LM4041C12ILPR suits prototyping and low-MOQ builds. |
| REF3012AIDBZR | Series reference (not shunt); 1.2 V output, ±0.2% tolerance, 50 ppm/°C, 3.6 V to 5.5 V supply required. | Requires external supply rail; unsuitable for shunt configurations or floating-sense applications. | Choose REF3012AIDBZR only when supply rail is available and lower tempco (50 ppm/°C) justifies added complexity and cost. |
Compared with LM4041C12IDCKR, LM4041C12ILPR offers identical performance in a smaller tape-and-reel format ideal for lab use and pilot runs; versus REF3012AIDBZR, it eliminates supply dependency and supports simpler two-terminal topologies but trades 50 ppm/°C for 100 ppm/°C tempco.
Availability
LM4041C12ILPR is available at Aetrix Electronics and suitable for energy metering, portable data acquisition, and industrial power-supply monitoring requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for LM4041C12ILPR 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 50 years of precision reference design heritage.
The LM4041 product line targets cost-sensitive, space-constrained applications demanding micropower operation, low noise, and robust capacitive-load stability-especially in portable instrumentation, smart meters, and industrial sensor interfaces.
FAQ
What is the maximum cathode current rating for LM4041C12ILPR?
The LM4041C12ILPR has a maximum continuous cathode current rating of 12 mA, as specified in Absolute Maximum Ratings. Exceeding this value risks thermal overstress and long-term parameter drift. At 12 mA and 1.225 V output, power dissipation reaches 14.7 mW-well within the SC-70 package's 252 °C/W thermal resistance limit at TA = 85°C.
Does LM4041C12ILPR require an output capacitor for stability?
No, LM4041C12ILPR does not require an output capacitor and is explicitly characterized as stable with all capacitive loads from 0 to 1 μF. This eliminates capacitor-related aging, microphonics, and board-space overhead. If used, a ceramic capacitor may reduce high-frequency noise but does not affect loop stability.
What is the function of Pin 5 (FB) on LM4041C12ILPR?
Pin 5 (FB) on LM4041C12ILPR is the feedback input for the adjustable version of the LM4041. In the fixed 1.225 V variant (LM4041C12ILPR), FB is internally disconnected and has no functional role. TI recommends leaving it floating or connecting it to Pin 1 (Anode) in high-EMI environments to suppress coupling.
How does the temperature coefficient of LM4041C12ILPR impact accuracy over –40°C to +85°C?
With a maximum temperature coefficient of 100 ppm/°C, LM4041C12ILPR contributes up to ±10.4 mV output drift over its full industrial range (125°C span). Combined with ±6 mV initial tolerance at 25°C, total worst-case error is ±16.4 mV (±1.34%)-sufficient for 12-bit systems and compliant with IEC 62053-21 Class 0.5 metering requirements.
Is LM4041C12ILPR pin-compatible with other LM4041 variants in SC-70-5?
Yes, LM4041C12ILPR shares identical SC-70-5 (DCK) pinout and footprint with all other LM4041x12I and LM4041x12Q SC-70 variants-including LM4041A12IDCKR and LM4041B12IDCKR. Pin assignments (Anode=1, NC=2, Cathode=3, NC=4, FB=5) are invariant across grades and temperature versions in this package.
LM4041C12ILPR 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:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°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
LM4041C12ILPR FAQ
1.How can I place an order for LM4041C12ILPR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041C12ILPR 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 LM4041C12ILPR reliable?
The price and inventory of LM4041C12ILPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041C12ILPR is usually 5 days.
3.What payment methods are accepted for LM4041C12ILPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041C12ILPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041C12ILPR?
LM4041C12ILPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041C12ILPR 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 LM4041C12ILPR?
For technical support, including LM4041C12ILPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041C12ILPR requirements.
6.How does Aetrix verify that LM4041C12ILPR is sourced from the original manufacturer or authorized distributors?
All LM4041C12ILPR 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 LM4041C12ILPR meets industry standards.
7.What is the process for return or replacement of LM4041C12ILPR?
All LM4041C12ILPR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041C12ILPR, 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 LM4041C12ILPR part is unused and in its original packaging.
Return procedure for LM4041C12ILPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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