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Texas Instruments LM4040D30ILPR
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- Part No.:
- LM4040D30ILPR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
LM4040D30ILPR.pdf
- Description:
- IC VREF SHUNT 1% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,392
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Product details
Overview
LM4040D30ILPR from Texas Instruments is a precision micropower shunt voltage reference with a fixed 3.0V output, D-grade (±1.0% initial tolerance, 150ppm/°C tempco), rated for –40°C to 85°C operation, packaged in SOT-23-3, and used in analog input modules and field transmitters requiring stable low-current biasing.
For engineers reviewing the LM4040D30ILPR datasheet, LM4040D30ILPR pinout, LM4040D30ILPR application, or LM4040D30ILPR equivalent, key selection criteria include cathode current range (45μA–15mA), dynamic impedance (≤1.2Ω), wideband noise (35μVRMS), thermal hysteresis (0.08%), and compatibility with all capacitive loads without external compensation.
Technical Context
The LM4040D30ILPR operates as a two-terminal shunt reference, sinking cathode current (IZ) to regulate voltage across its terminals. Its Zener-based architecture uses wafer-level fuse/Zener-zap trimming to achieve D-grade accuracy, with low dynamic impedance enabling stable regulation under varying load currents.
It functions across a wide cathode current range (45μA to 15mA) and maintains performance over –40°C to 85°C without external capacitors. The device's 35μVRMS wideband noise and 0.08% thermal hysteresis support high-resolution data acquisition where long-term voltage stability is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V nominal; tight regulation enables accurate ADC reference and sensor excitation in 3.3V systems. |
| Initial Tolerance | ±1.0% at 25°C; defines maximum deviation before temperature or aging effects. |
| Tempco | 150ppm/°C max; contributes ≤±0.195% error over –40°C to 85°C ambient range. |
| Cathode Current Range | 45μA to 15mA; supports ultra-low-power sensor biasing and higher-current DAC references. |
| Dynamic Impedance | ≤1.2Ω at 1mA; ensures minimal output voltage shift under transient load changes. |
| Wideband Noise | 35μVRMS (10Hz–10kHz); low enough to avoid degrading 16-bit+ ADC effective resolution. |
| Thermal Hysteresis | 0.08%; limits repeatability error after thermal cycling in industrial environments. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92mm × 1.30mm footprint, surface-mount, thermally efficient for space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input | Connects to supply rail; sinks current to maintain regulated 3.0V across anode–cathode. |
| Anode (Pin 2) | Common reference node | Typically grounded; establishes return path and defines output voltage relative to system ground. |
| NC (Pin 3) | No internal connection | Unused terminal; must be left floating or tied to anode per EMI mitigation guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output capacitor-reduces BOM count and layout sensitivity in noisy environments. |
| Low 35μVRMS noise | Preserves signal integrity in precision measurement paths without requiring additional filtering. |
| 45μA minimum operating current | Enables use in battery-powered field instruments with multi-year operational life. |
| –40°C to 85°C industrial rating | Validated performance across full temperature range without derating or external compensation. |
| 1.2Ω dynamic impedance | Minimizes load-induced voltage droop during fast current transients in programmable logic controllers. |
Applications
| Industrial Analog Input Module | Field Transmitter |
|---|---|
Use Scenario: 4–20mA loop-powered sensor interface with integrated 16-bit ADC and microcontroller. IC Role / Device Role / Timing Role: Provides stable 3.0V reference for ADC conversion and sensor excitation circuitry. Use Value: ±1.0% initial tolerance and 150ppm/°C tempco ensure <±0.3% total error over temperature, meeting IEC 61000-6-2 immunity requirements. | Use Scenario: Loop-powered pressure/temperature transmitter mounted in oil & gas pipeline enclosures. IC Role / Device Role / Timing Role: Supplies precise bias voltage to bridge sensors and instrumentation amplifiers. Use Value: 45μA min current enables operation down to 3.3V supply with >100kΩ series resistance, extending usable loop voltage range. |
| Data-Acquisition System | Energy Infrastructure Monitoring |
Use Scenario: Portable power quality analyzer capturing voltage/current harmonics with 24-bit sigma-delta ADCs. IC Role / Device Role / Timing Role: Low-noise 3.0V reference for ADC front-end and anti-aliasing filter calibration. Use Value: 35μVRMS noise avoids adding ≥0.5 LSB error in 24-bit conversions, preserving dynamic range. | Use Scenario: Smart meter auxiliary power supply monitoring module measuring grid voltage sag/swell events. IC Role / Device Role / Timing Role: Reference for high-side voltage divider feedback in isolated DC-DC converters. Use Value: Thermal hysteresis of 0.08% prevents drift-induced false alarms during repeated thermal cycling in outdoor meter cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C30IDBZR | Same 3.0V output, C-grade (±0.5%), lower tempco (100ppm/°C), SOT-23-3 package. | Better accuracy/tempco but higher minimum current (75μA vs. 45μA); less suitable for ultra-low-power designs. | Select when tighter initial tolerance and lower tempco outweigh micropower requirements. |
| MAX6003EUR+T | 3.0V output, A-grade (±0.1%), 50ppm/°C tempco, SC70-3 package, 20μA min current. | Higher accuracy and lower noise (20μVRMS), but limited to –40°C to 85°C and not qualified for extended-life industrial use. | Choose for portable test equipment needing best-in-class precision at lowest quiescent current. |
Compared with TL4050C30IDBZR and MAX6003EUR+T, the LM4040D30ILPR offers the optimal balance of cost, industrial temperature rating, and micropower operation-making it preferred for field-deployed analog input modules where reliability and supply headroom are constrained.
Availability
LM4040D30ILPR is available at Aetrix Electronics and suitable for industrial analog input modules, field transmitters, data-acquisition systems, and energy infrastructure monitoring requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4040D30ILPR 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, embedded processing, and connectivity solutions with deep expertise in precision analog design and industrial-grade reliability.
The LM4040 series was developed specifically for high-accuracy, low-power shunt reference applications in industrial sensing, process control, and data acquisition-emphasizing stability, noise performance, and ease of use without external components.
FAQ
What is the operating temperature range for the LM4040D30ILPR?
The LM4040D30ILPR is characterized for operation across –40°C to +85°C ambient temperature. This industrial-grade rating is validated per TI's electrical specifications in Section 6.12 of the datasheet, with all parameters-including output voltage tolerance, tempco, and dynamic impedance-guaranteed across this full range without derating.
Does the LM4040D30ILPR require an external output capacitor?
No, the LM4040D30ILPR is stable with all capacitive loads and does not require an external output capacitor. This is confirmed in the Features section and Section 3 (Description) of the datasheet, enabling simplified layout and eliminating capacitor-related failure modes in harsh industrial environments.
What is the minimum cathode current needed for regulation in the LM4040D30ILPR?
The LM4040D30ILPR requires a minimum cathode current of 45μA (typical) at 25°C to maintain regulation, rising to 82μA across –40°C to 85°C. This value is specified in Table 6.12 (LM4040C30I/LM4040D30I Electrical Characteristics) and defines the lowest usable current for stable 3.0V output.
How does the LM4040D30ILPR compare to the A- or B-grade variants in accuracy?
The LM4040D30ILPR has ±1.0% initial tolerance and 150ppm/°C temperature coefficient-looser than A-grade (±0.1%, 100ppm/°C) or B-grade (±0.2%, 100ppm/°C). It trades precision for cost-effectiveness in applications where ±1% total error over temperature is acceptable, such as non-critical sensor biasing or supervisory circuits.
Can the LM4040D30ILPR be used in automotive applications?
The LM4040D30ILPR is not AEC-Q200 qualified and is rated only for –40°C to +85°C, making it unsuitable for under-hood automotive applications. For automotive use, TI recommends the LM4040-Q1 series (e.g., LM4040D30QDBZRQ1), which is qualified to AEC-Q100 Grade 3 (–40°C to +125°C) and includes enhanced reliability testing.
LM4040D30ILPR 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 82 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4040D30ILPR FAQ
1.How can I place an order for LM4040D30ILPR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040D30ILPR 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 LM4040D30ILPR reliable?
The price and inventory of LM4040D30ILPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D30ILPR is usually 5 days.
3.What payment methods are accepted for LM4040D30ILPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040D30ILPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040D30ILPR?
LM4040D30ILPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040D30ILPR 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 LM4040D30ILPR?
For technical support, including LM4040D30ILPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D30ILPR requirements.
6.How does Aetrix verify that LM4040D30ILPR is sourced from the original manufacturer or authorized distributors?
All LM4040D30ILPR 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 LM4040D30ILPR meets industry standards.
7.What is the process for return or replacement of LM4040D30ILPR?
All LM4040D30ILPR units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D30ILPR, 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 LM4040D30ILPR part is unused and in its original packaging.
Return procedure for LM4040D30ILPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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