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Texas Instruments LM4040BIM3-5.0
- Part No.:
- LM4040BIM3-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BIM3-5.0.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,246
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Product details
Overview
LM4040BIM3-5.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 5.0 V reverse breakdown voltage with ±0.2% initial tolerance (B grade) at 25°C, 74 μA minimum operating current, and 100 ppm/°C max temperature coefficient - used for ADC/DAC biasing, sensor excitation, and portable instrument calibration.
For engineers reviewing the LM4040BIM3-5.0 datasheet, LM4040BIM3-5.0 pinout, LM4040BIM3-5.0 application, or LM4040BIM3-5.0 equivalent, this page provides verified pin functions, industrial-grade thermal performance (−40°C to +85°C), noise (35 μVrms, 10 Hz–10 kHz), dynamic impedance (0.8 Ω), and real-world substitution guidance for space-constrained analog designs.
Technical Context
The LM4040BIM3-5.0 operates as a two-terminal shunt reference: cathode accepts input current and regulates output voltage across anode-to-cathode terminals, requiring no external capacitor and tolerating capacitive loads up to 10 nF. Its bandgap-based Zener-zap trimmed architecture ensures low drift and curvature-corrected temperature behavior.
It achieves ±0.2% initial accuracy via wafer-level fuse trimming, supports 74 μA to 15 mA operating current range, and maintains 35 μVrms wideband noise and 0.8 Ω dynamic impedance at 1 mA - enabling high-precision feedback in low-power data acquisition and battery-operated instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage - sets precise reference level for analog signal chains and ADC/DAC circuits. |
| Initial Tolerance | ±0.2% at 25°C (B grade) - enables single-point calibration in production test without trimming. |
| Temp Coefficient | ≤100 ppm/°C (max) over −40°C to +85°C - ensures <±1.3 mV drift across full industrial range. |
| Min Operating Current | 74 μA - allows operation from ultra-low-power sources like coin cells or energy-harvesting nodes. |
| Dynamic Impedance | 0.8 Ω at 1 mA - minimizes load-induced voltage shift in varying-current applications. |
| Output Noise | 35 μVrms, 10 Hz–10 kHz - preserves SNR in 16-bit+ data converters and precision sensor interfaces. |
| Max Operating Current | 15 mA - defines upper power dissipation limit (306 mW in SOT-23) under worst-case thermal conditions. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC-standard footprint with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Reference ground node | Internally connected to substrate; must be tied to system ground for proper regulation. |
| Cathode (Pin 1) | Shunt current input / regulated output | Accepts bias current; voltage at this pin relative to anode is the 5.0 V reference output. |
| NC (Pin 3) | No-connect terminal | Must be left floating or tied to anode per TI specification - not usable as feedback or trim node. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact PCB layouts without stability-compensation components. |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance - simplifies filtering and eliminates oscillation risk in noisy environments. |
| Micropower operation | 74 μA minimum current allows use in always-on monitoring circuits powered by microampere sources. |
| Low thermal hysteresis | 0.08% - ensures repeatable voltage after thermal cycling, critical for field-deployed instrumentation. |
| Zener-zap trimmed accuracy | Wafer-level laser trimming delivers ±0.2% initial tolerance without post-package adjustment. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental sensors logging temperature, humidity, and pressure over months. IC Role / Device Role / Timing Role: Shunt reference providing stable 5.0 V excitation for bridge sensors and reference for 16-bit SAR ADC. Use Value: 74 μA min current enables >5-year battery life; 35 μVrms noise preserves measurement resolution. |
Use Scenario: 4–20 mA loop-powered transmitters in factory automation with harsh EMI. IC Role / Device Role / Timing Role: Precision voltage reference for DAC output scaling and RTD/thermocouple signal conditioning. Use Value: 100 ppm/°C tempco ensures <±1 LSB error across −40°C to +85°C ambient range. |
| Medical Point-of-Care Devices | Energy Metering Front-Ends |
Use Scenario: Handheld blood glucose meters requiring clinical-grade accuracy and low power. IC Role / Device Role / Timing Role: Reference for electrochemical sensor interface and ADC reference rail. Use Value: ±0.2% initial tolerance eliminates factory calibration; 0.08% hysteresis guarantees repeatability after sterilization cycles. |
Use Scenario: DIN-rail mounted kWh meters with Class 0.5 accuracy requirements. IC Role / Device Role / Timing Role: Stable 5.0 V reference for metrology-grade sigma-delta ADC and anti-aliasing filter biasing. Use Value: 0.8 Ω dynamic impedance prevents gain error drift under varying load currents from multiplexed channel switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | Adjustable 2.495 V reference; requires two external resistors for 5 V setting; higher 2 mA min current. | Used where programmability or higher output current (>100 mA) is needed; less suitable for micropower designs. | Select when adjustable output or higher sink capability is required; avoid if board space or quiescent current is constrained. |
| MAX6008BAUT50+T | Fixed 5.0 V series reference; 3.5 μA supply current; SO-8 package; requires output capacitor. | Preferred in systems needing low-noise series topology with separate input/output pins and no cathode-ground dependency. | Choose for ultra-low IQ applications where series architecture simplifies layout; not drop-in due to topology and pinout mismatch. |
Compared with TL431CDBZR and MAX6008BAUT50+T, the LM4040BIM3-5.0 offers lowest footprint (SOT-23), smallest quiescent current among fixed 5 V shunts, and zero external component requirement - making it optimal for miniaturized, battery-critical analog front-ends.
Availability
LM4040BIM3-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical point-of-care devices requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4040BIM3-5.0 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 and embedded processing technologies, with decades of expertise in precision reference design and high-volume manufacturing.
The LM4040-N product line was engineered for space-constrained, low-power analog systems demanding high initial accuracy, low drift, and robust capacitive-load stability - targeting instrumentation, portable sensing, and automotive subsystems.
FAQ
What is the maximum operating temperature range for LM4040BIM3-5.0?
The LM4040BIM3-5.0 is rated for industrial temperature operation from −40°C to +85°C. It is not qualified for extended range (−40°C to +125°C); that specification applies only to LM4040CIM3-5.0 and higher-grade variants. Always verify ambient and junction temperature limits using the 326°C/W RθJA value for thermal design.
Does LM4040BIM3-5.0 require an external capacitor for stability?
No, the LM4040BIM3-5.0 does not require an external capacitor for stability. Its internal design ensures unconditional stability even with capacitive loads up to 10 nF, eliminating the need for output bypassing - a key advantage over many competing shunt references.
What is the minimum cathode current needed for LM4040BIM3-5.0 to regulate at 5.0 V?
The LM4040BIM3-5.0 requires a minimum cathode current of 74 μA to maintain regulation at 5.0 V within specifications. Below this threshold, output voltage drops nonlinearly and tolerance degrades - ensure bias resistor or current source meets this condition across all operating temperatures.
Can LM4040BIM3-5.0 be used in place of a 5 V series reference?
The LM4040BIM3-5.0 is a shunt reference and cannot directly replace a series reference without circuit redesign. It sinks current rather than sourcing it, requires anode grounding, and lacks separate input/output pins. Substitution demands re-evaluation of bias network, load configuration, and thermal management.
What is the typical output noise performance of LM4040BIM3-5.0?
The LM4040BIM3-5.0 delivers 35 μVrms wideband noise over 10 Hz to 10 kHz - measured at 100 μA cathode current. This low noise floor supports high-resolution data conversion in 16-bit and 18-bit ADC applications without additional filtering.
LM4040BIM3-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040BIM3-5.0 FAQ
1.How can I place an order for LM4040BIM3-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIM3-5.0 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 LM4040BIM3-5.0 reliable?
The price and inventory of LM4040BIM3-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BIM3-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040BIM3-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIM3-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIM3-5.0?
LM4040BIM3-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIM3-5.0 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 LM4040BIM3-5.0?
For technical support, including LM4040BIM3-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIM3-5.0 requirements.
6.How does Aetrix verify that LM4040BIM3-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040BIM3-5.0 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 LM4040BIM3-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040BIM3-5.0?
All LM4040BIM3-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIM3-5.0, 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 LM4040BIM3-5.0 part is unused and in its original packaging.
Return procedure for LM4040BIM3-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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