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Texas Instruments LM4040C30ILPE3
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- Part No.:
- LM4040C30ILPE3
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040C30ILPE3.pdf
- Description:
- IC VREF SHUNT 0.5% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,687
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Product details
Overview
LM4040C30ILPE3 from Texas Instruments is a precision 3.0V shunt voltage reference in SOT-23-3 package, rated for industrial temperature range (–40°C to +85°C), with ±0.5% initial accuracy, 100ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation down to 45μA cathode current. It serves as a compact, low-power voltage reference in analog-to-digital converters and sensor signal conditioning circuits.
For engineers reviewing the LM4040C30ILPE3 datasheet, LM4040C30ILPE3 pinout, LM4040C30ILPE3 application, or LM4040C30ILPE3 equivalent, key selection criteria include its guaranteed 3.0V output tolerance over temperature, minimal dynamic impedance (0.9Ω typical), no-output-capacitor-required stability, and compatibility with high-EMI environments via optional pin 3 connection.
Technical Context
The LM4040C30ILPE3 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 ±0.5% initial accuracy at 25°C and maintains tight regulation over –40°C to +85°C using a 100ppm/°C tempco.
It delivers low-noise performance (35μVRMS, 10Hz–10kHz) and low dynamic impedance (0.4–0.9Ω), enabling high-accuracy feedback in precision data acquisition systems. The device requires no external capacitor and remains stable with all capacitive loads, simplifying layout in space-constrained portable and industrial designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V nominal at IZ = 100μA; fixed value, no adjustment required |
| Initial Accuracy | ±0.5% max at 25°C; ensures ≤±15mV absolute error in calibration-critical circuits |
| Tempco | 100ppm/°C max; contributes ≤±6.5mV drift over –40°C to +85°C ambient |
| Min Cathode Current | 45μA typical; enables ultra-low-power operation in battery-powered sensors |
| Dynamic Impedance | 0.9Ω typical at IZ = 1mA; minimizes load-induced voltage variation in varying-current applications |
| Wideband Noise | 35μVRMS (10Hz–10kHz); supports 16-bit+ ADC resolution without added filtering |
| Operating Temp Range | –40°C to +85°C; qualified for industrial-grade embedded systems and field transmitters |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92mm × 1.30mm footprint, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage reference node | Connected to supply rail; sinks current to regulate voltage at this node to 3.0V |
| Anode (Pin 2) | Common return / ground reference | Typically tied to system ground; defines 0V reference for regulated output |
| NC (Pin 3) | No internal connection | Must float or be connected to anode in high-EMI environments per TI recommendation |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.0V output | Eliminates external resistor network; reduces BOM count and layout area |
| Stable with all capacitive loads | Enables direct connection to ADC reference inputs or op-amp feedback nodes without stability compensation |
| Low 45μA minimum operating current | Supports micropower operation in always-on sensor nodes and energy-harvesting systems |
| 100ppm/°C tempco (C grade) | Meets industrial-grade accuracy requirements without ovenization or digital calibration |
| 35μVRMS low noise | Preserves SNR in precision measurement front-ends without requiring additional low-noise LDOs |
Applications
| Industrial Analog Input Module | Portable Data Logger |
|---|---|
Use Scenario: 16-bit isolated analog input channel measuring 4–20mA loop signals in PLC backplanes. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 3.0V reference for SAR ADC and instrumentation amplifier gain-setting. Use Value: ±0.5% initial accuracy and 100ppm/°C tempco ensure <0.1% total unadjusted error over temperature without recalibration. |
Use Scenario: Battery-powered environmental sensor node logging temperature/humidity with 12–16-bit resolution. IC Role / Device Role / Timing Role: Low-current shunt reference powering ADC reference and microcontroller VREF input. Use Value: 45μA min cathode current extends battery life >5 years in sleep-dominated duty cycles. |
| Field Transmitter Calibration | Precision Audio Level Meter |
Use Scenario: Two-wire 4–20mA transmitter with onboard HART modulation and self-test functionality. IC Role / Device Role / Timing Role: Primary voltage reference for DAC-based current loop control and diagnostic ADC. Use Value: Thermal hysteresis of 0.08% ensures repeatable calibration after thermal cycling in outdoor enclosures. |
Use Scenario: Studio-grade audio level meter with RMS detection and LED bar graph display. IC Role / Device Role / Timing Role: Reference source for logarithmic converter and comparator thresholds. Use Value: 35μVRMS noise floor prevents audible hiss and enables accurate sub-dB-level detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C30IDBZR | Same electrical specs; SOT-23-3 package, tape-and-reel packaging, no "LPE3" suffix (TI's legacy RoHS marking) | Identical functional behavior; differs only in packaging format and compliance marking | Select when standard reel delivery and TI's current RoHS labeling are required |
| MAX6003EUR+T | 3.0V shunt ref, ±0.5% accuracy, but higher 75μA min cathode current and 50μVRMS noise | Less suitable for ultra-low-power or high-resolution ADC applications due to higher current/noise | Consider only if LM4040C30ILPE3 is unavailable and system can tolerate 30% higher quiescent current |
Compared with LM4040C30ILPE3, LM4040C30IDBZR offers identical performance in a standard reel format, while MAX6003EUR+T trades lower power and noise for reduced availability and higher cost-making LM4040C30ILPE3 optimal for industrial data acquisition where micropower and low-noise are critical.
Availability
LM4040C30ILPE3 is available at Aetrix Electronics and suitable for industrial analog input modules, portable data loggers, field transmitters, and precision audio level meters requiring stable component supply and long-term production continuity.
Supply support for LM4040C30ILPE3 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, embedded processing, and power management ICs, with decades of expertise in precision reference design.
The LM4040 series was engineered specifically for high-accuracy, low-power shunt reference applications in industrial, automotive, and portable systems-emphasizing ease of use, no-output-capacitor operation, and robust thermal performance.
FAQ
What is the maximum cathode current rating for LM4040C30ILPE3?
The absolute maximum cathode current for LM4040C30ILPE3 is 25mA, per TI's Absolute Maximum Ratings. However, the recommended operating range is 45μA to 15mA. Exceeding 15mA may increase self-heating and degrade long-term stability; sustained operation above 25mA risks permanent damage.
Does LM4040C30ILPE3 require an output capacitor for stability?
No, LM4040C30ILPE3 is designed to be stable with all capacitive loads and does not require an output capacitor. This eliminates board space and cost associated with external capacitance, and avoids potential phase-margin issues seen in series references-confirmed in TI's datasheet Section 3 and Figure 8-1.
What is the purpose of Pin 3 (NC) on LM4040C30ILPE3?
Pin 3 is a no-connect terminal with no internal bond. TI recommends leaving it floating or connecting it directly to the anode (Pin 2) in high-EMI environments-such as near switching power supplies or motors-to reduce noise coupling into the reference node and improve long-term voltage stability.
How does the temperature coefficient affect LM4040C30ILPE3's output over its full operating range?
With a maximum 100ppm/°C tempco and 3.0V nominal output, LM4040C30ILPE3 exhibits ≤±6.5mV total drift from –40°C to +85°C (ΔT = 125°C). Combined with ±15mV initial tolerance, worst-case output spans 2.9785V to 3.0215V-verified in Section 6.12 of the TI datasheet under full-range conditions.
Is LM4040C30ILPE3 suitable for automotive applications?
LM4040C30ILPE3 is specified for –40°C to +85°C (industrial grade), not the extended –40°C to +125°C required for most automotive under-hood applications. For automotive use, TI's LM4040C30Q variants (e.g., LM4040C30QDBZRQ1) are AEC-Q100 qualified and rated to 125°C ambient.
LM4040C30ILPE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°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
LM4040C30ILPE3 FAQ
1.How can I place an order for LM4040C30ILPE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040C30ILPE3 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 LM4040C30ILPE3 reliable?
The price and inventory of LM4040C30ILPE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040C30ILPE3 is usually 5 days.
3.What payment methods are accepted for LM4040C30ILPE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040C30ILPE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040C30ILPE3?
LM4040C30ILPE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040C30ILPE3 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 LM4040C30ILPE3?
For technical support, including LM4040C30ILPE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040C30ILPE3 requirements.
6.How does Aetrix verify that LM4040C30ILPE3 is sourced from the original manufacturer or authorized distributors?
All LM4040C30ILPE3 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 LM4040C30ILPE3 meets industry standards.
7.What is the process for return or replacement of LM4040C30ILPE3?
All LM4040C30ILPE3 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040C30ILPE3, 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 LM4040C30ILPE3 part is unused and in its original packaging.
Return procedure for LM4040C30ILPE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040C30ILPE3 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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