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Texas Instruments LM4040D30ILPRE3
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- Part No.:
- LM4040D30ILPRE3
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
LM4040D30ILPRE3.pdf
- Description:
- IC VREF SHUNT 1% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,502
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Product details
Overview
LM4040D30ILPRE3 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 in SOT-23-3 package. It delivers low noise (35μVRMS), stable performance across 45μA–15mA cathode current, and requires no output capacitor-ideal for analog input modules and portable data-acquisition systems.
For engineers reviewing the LM4040D30ILPRE3 datasheet, LM4040D30ILPRE3 pinout, LM4040D30ILPRE3 application, or LM4040D30ILPRE3 equivalent, key selection criteria include its 3.0V reference accuracy over temperature, ultra-low quiescent current capability, dynamic impedance under 1.2Ω, thermal hysteresis of 0.08%, and compatibility with all capacitive loads without stability compensation.
Technical Context
The LM4040D30ILPRE3 operates as a two-terminal shunt reference, sinking cathode current (IZ) to maintain a precise 3.0V reverse breakdown voltage across its terminals. Its Zener-zap trimmed silicon design achieves ±1.0% initial accuracy and 150ppm/°C temperature coefficient over –40°C to 85°C, with low dynamic impedance (≤1.2Ω at 1mA) enabling high PSRR in ratiometric ADC biasing.
It functions without external components-no output capacitor needed-and remains stable with any capacitive load. Its 45μA minimum operating current and 35μVRMS wideband noise (10Hz–10kHz) support high-resolution measurement front-ends where supply headroom and signal integrity are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V nominal; enables direct biasing of 3.3V-system ADCs and sensors without level-shifting. |
| Initial Tolerance | ±1.0% at 25°C; defines worst-case DC error before temperature drift 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 nodes and high-current precision DAC references. |
| Dynamic Impedance | ≤1.2Ω at 1mA; ensures <1mV output shift under 1mA load transients, critical for ratiometric accuracy. |
| Output Noise | 35μVRMS (10Hz–10kHz); limits RMS voltage error to <0.001% of 3.0V, preserving 16-bit+ resolution. |
| Thermal Hysteresis | 0.08%; guarantees repeatability after thermal cycling-vital for field-deployed instrumentation. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92mm × 1.30mm footprint, surface-mount, JEDEC-compliant, thermally efficient (RθJA = 206°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input | Connects to regulated supply rail; sinks all reference current plus load current-defines voltage node. |
| Anode (Pin 2) | Common ground reference | Must be tied to system ground; forms return path for cathode current and sets 0V reference point. |
| NC (Pin 3) | No internal connection | Unused terminal; electrically isolated-no routing or grounding required on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free operation | Stable with any capacitive load up to 100nF; eliminates BOM cost, layout area, and ESR-related instability risk. |
| Micropower startup | 45μA minimum cathode current enables use in battery-powered devices with >10-year shelf life. |
| Low-noise reference | 35μVRMS noise floor supports 16-bit SAR and delta-sigma ADCs without external filtering. |
| Wide current range | Operates from 45μA to 15mA-supports both ultra-low-power sensing and high-precision active circuitry. |
| Robust thermal performance | Specified over –40°C to 85°C with 0.08% thermal hysteresis-ensures repeatable calibration in industrial environments. |
Applications
| Analog Input Module | Data-Acquisition System |
|---|---|
Use Scenario: High-channel-count PLC analog input card measuring 4–20mA sensor signals with 16-bit ADCs. IC Role / Device Role / Timing Role: Provides stable 3.0V reference for ADC VREF and sensor excitation, rejecting supply ripple. Use Value: Enables ±0.01% full-scale accuracy over temperature without recalibration, reducing field service costs. | Use Scenario: Portable handheld multimeter with autoranging, true-RMS conversion, and battery operation. IC Role / Device Role / Timing Role: Supplies low-noise, low-drift reference for dual-slope integrator and auto-zero amplifier stages. Use Value: Maintains 4½-digit resolution across battery discharge (2.8–3.6V supply) due to minimal current draw and load regulation. |
| Field Transmitter | Energy Infrastructure |
Use Scenario: Loop-powered 4–20mA temperature transmitter in hazardous-area oil & gas installations. IC Role / Device Role / Timing Role: Generates precision 3.0V bias for RTD bridge and signal conditioning op-amps within <4mA total loop budget. Use Value: Delivers <0.1% total error over –40°C to 70°C ambient using only 45μA quiescent current-maximizing loop margin. | Use Scenario: Smart electricity meter with metrology-grade ADC, anti-tampering monitoring, and RF communication. IC Role / Device Role / Timing Role: References voltage scaling for current-sense amplifiers and isolation barrier drivers in Class 0.2 metering path. Use Value: Guarantees long-term stability (120ppm/1000h) and low hysteresis-meeting IEC 62053-21 accuracy requirements. |
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, ±0.5% initial tolerance (C-grade), 100ppm/°C tempco, SOT-23-3 package. | Better accuracy and lower tempco; higher cost; requires ≥60μA min current. | Select when tighter initial error (<±15mV) and improved thermal drift (<±0.065%) justify premium pricing. |
| MAX6003EUR+T | 3.0V output, ±0.5% tolerance, 75ppm/°C tempco, SC70-3 package, 20μA min current. | Lower quiescent current and superior tempco; smaller SC70 footprint; not qualified for extended temperature. | Prefer for space-constrained, ultra-low-power designs operating strictly within –40°C to 85°C industrial range. |
Compared with TL4050C30IDBZR and MAX6003EUR+T, the LM4040D30ILPRE3 offers the lowest cost per unit and highest current drive capability (15mA), making it optimal for cost-sensitive, moderate-accuracy applications where board space and extreme micropower are secondary concerns.
Availability
LM4040D30ILPRE3 is available at Aetrix Electronics and suitable for analog input modules, data-acquisition systems, and field transmitters requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LM4040D30ILPRE3 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 for industrial, automotive, and personal electronics markets.
The LM4040 series was designed specifically for precision voltage referencing in space-constrained, low-power systems-emphasizing ease of use, capacitor-free stability, and grade-scalable accuracy for cost-optimized design-in.
FAQ
What is the maximum cathode current rating for LM4040D30ILPRE3?
The LM4040D30ILPRE3 has an absolute maximum cathode current rating of 25mA, but its recommended operating range is 45μA to 15mA. Exceeding 15mA may increase self-heating and degrade long-term stability; operation above 25mA risks permanent damage per TI's Absolute Maximum Ratings table.
Does LM4040D30ILPRE3 require an output capacitor for stability?
No, the LM4040D30ILPRE3 is internally compensated and stable with all capacitive loads-including 0μF-due to its shunt topology and low dynamic impedance. Adding an output capacitor is unnecessary and may introduce phase-shift issues in fast transient conditions; TI explicitly states "no output capacitor required" in the device description.
What is the thermal hysteresis specification for LM4040D30ILPRE3?
The LM4040D30ILPRE3 exhibits 0.08% thermal hysteresis, defined as the voltage difference measured at 25°C after cycling to –40°C versus after cycling to 125°C. This value is consistent across all LM4040 grades and packages, ensuring repeatable reference voltage behavior in cyclic thermal environments like outdoor industrial enclosures.
Can LM4040D30ILPRE3 be used in automotive applications?
The LM4040D30ILPRE3 is specified for –40°C to 85°C operation (industrial grade), not the full AEC-Q100 automotive temperature range (–40°C to 125°C). While it may function in cabin applications, TI does not qualify or guarantee its reliability for under-hood or safety-critical automotive use; the LM4040D30Q variant is the automotive-qualified version.
How does the 150ppm/°C temperature coefficient impact accuracy over temperature for LM4040D30ILPRE3?
With a 3.0V nominal output and 150ppm/°C tempco, the LM4040D30ILPRE3 contributes up to ±0.195% error over its full –40°C to 85°C range (ΔT = 125°C). Combined with its ±1.0% initial tolerance, total worst-case error is ±1.195%-or ±35.85mV-making it suitable for applications needing ~0.1% system-level accuracy without trimming.
LM4040D30ILPRE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
LM4040D30ILPRE3 FAQ
1.How can I place an order for LM4040D30ILPRE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040D30ILPRE3 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 LM4040D30ILPRE3 reliable?
The price and inventory of LM4040D30ILPRE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D30ILPRE3 is usually 5 days.
3.What payment methods are accepted for LM4040D30ILPRE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040D30ILPRE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040D30ILPRE3?
LM4040D30ILPRE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040D30ILPRE3 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 LM4040D30ILPRE3?
For technical support, including LM4040D30ILPRE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D30ILPRE3 requirements.
6.How does Aetrix verify that LM4040D30ILPRE3 is sourced from the original manufacturer or authorized distributors?
All LM4040D30ILPRE3 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 LM4040D30ILPRE3 meets industry standards.
7.What is the process for return or replacement of LM4040D30ILPRE3?
All LM4040D30ILPRE3 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D30ILPRE3, 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 LM4040D30ILPRE3 part is unused and in its original packaging.
Return procedure for LM4040D30ILPRE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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