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Texas Instruments LM4040AIM3X-5.0
- Part No.:
- LM4040AIM3X-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040AIM3X-5.0.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,519
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Product details
Overview
LM4040AIM3X-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 ±0.1% initial tolerance (A grade) at 25°C, 100 ppm/°C max temperature coefficient, and 74 μA minimum operating current - used for ADC/DAC biasing, sensor excitation, and portable instrument calibration.
For engineers reviewing the LM4040AIM3X-5.0 datasheet, LM4040AIM3X-5.0 pinout, LM4040AIM3X-5.0 application, or LM4040AIM3X-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 direct alternative part comparisons for design-in validation.
Technical Context
The LM4040AIM3X-5.0 operates as a two-terminal shunt reference, sinking current through its cathode to maintain precise 5.0 V across external load/resistor networks. Its bandgap-derived Zener-zap trimmed structure ensures low curvature error and stable output under capacitive loads without requiring an output capacitor.
It achieves ±0.1% initial accuracy via wafer-level fuse trimming and supports wide operating current (74 μA to 15 mA) while maintaining low dynamic impedance (≤0.8 Ω) and ultra-low wideband noise (35 μVrms). Thermal hysteresis is limited to 0.08% after −40°C/125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and factory-trimmed - sets accurate bias point for analog signal chains. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - enables high-resolution data acquisition without post-calibration. |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C - ensures <±19 mV drift across full industrial range. |
| Min Operating Current | 74 μA - allows ultra-low-power operation in battery-backed systems and energy-harvesting nodes. |
| Dynamic Impedance | 0.8 Ω at 1 mA - minimizes load-induced voltage shift during transient current demand. |
| Output Noise | 35 μVrms, 10 Hz–10 kHz - preserves SNR in precision measurement front-ends. |
| Long-Term Stability | 120 ppm over 1000 hours - supports reliable performance in unattended instrumentation. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC-compliant footprint with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / output voltage node | Connected to regulated 5.0 V rail; sinks all reference current - must be decoupled locally if driving noisy loads. |
| Anode (Pin 2) | Reference ground terminal | Typically tied to system ground; forms return path for shunt current - requires low-impedance connection. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must remain floating or tied to Pin 2 per datasheet - no routing or PCB trace required. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with any capacitive load up to 10 nF - eliminates BOM cost and layout area for external stabilization. |
| Wide operating current range | 74 μA to 15 mA - supports both microamp-sleep modes and high-current precision references in same design. |
| Low temperature coefficient | ≤100 ppm/°C - delivers consistent 5.0 V across industrial ambient variations without software compensation. |
| Tolerates capacitive loads | Stable under 10 nF load capacitance - enables direct interface to ADC input caps and op-amp feedback networks. |
| Zener-zap trimmed accuracy | ±0.1% at 25°C (A grade) - achieved via wafer-sort fuse trimming, ensuring high yield and binning consistency. |
Applications
| Portable Instrument Calibration | Data Acquisition Biasing |
|---|---|
|
Use Scenario: Handheld multimeters and portable calibrators requiring stable 5 V reference under varying battery voltage and temperature. IC Role / Device Role / Timing Role: Shunt reference providing primary voltage基准 for 16-bit SAR ADCs and DACs. Use Value: ±0.1% initial tolerance and ≤100 ppm/°C TC ensure <±0.5 LSB error across −10°C to +50°C handheld operating range. |
Use Scenario: Industrial DAQ modules digitizing 4–20 mA sensor loops and thermocouple signals. IC Role / Device Role / Timing Role: Precision 5.0 V reference for ADC reference input and sensor excitation. Use Value: 35 μVrms noise and 0.8 Ω dynamic impedance prevent reference-induced quantization noise and gain drift. |
| Energy Meter Reference | Automotive Sensor Signal Conditioning |
|
Use Scenario: Revenue-grade electricity meters needing metrology-grade voltage reference over 10-year field life. IC Role / Device Role / Timing Role: Primary shunt reference for polyphase energy measurement ICs (e.g., ADE78xx). Use Value: 120 ppm long-term stability and 0.08% thermal hysteresis ensure <0.1% metering error accumulation over lifetime. |
Use Scenario: Engine control units conditioning pressure and temperature sensor outputs in under-hood environments. IC Role / Device Role / Timing Role: Stable 5.0 V bias source for ratiometric sensor interfaces and analog front-ends. Use Value: −40°C to +85°C operation and AEC-Q200-compatible SOT-23 package support automotive qualification 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 |
|---|---|---|---|
| TL4050C50IDBZR | 5.0 V, ±0.5% initial tolerance, 75 ppm/°C TC, 60 μA min current - looser accuracy but lower cost. | Acceptable for non-critical industrial sensors where ±0.5% system error budget permits. | Select when cost sensitivity outweighs need for <±0.1% absolute accuracy. |
| REF3050AIDBZR | 5.0 V, ±0.2% initial tolerance, 50 ppm/°C TC, 50 μA min current - series topology, higher PSRR, requires output cap. | Better suited for noisy supply environments; not pin-compatible due to 3-pin series architecture. | Choose for improved supply rejection and tighter TC where board space allows series reference layout. |
Compared with TL4050C50IDBZR and REF3050AIDBZR, the LM4040AIM3X-5.0 offers the highest initial accuracy (±0.1%) in a minimal 3-pin shunt form factor, enabling compact, low-cost, and ultra-stable reference designs without external components - ideal for space-constrained portable and embedded systems.
Availability
LM4040AIM3X-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, energy metering, and automotive sensor signal conditioning requiring stable component supply and long-term parametric consistency.
Supply support for LM4040AIM3X-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, embedded processing, and power management technologies, with decades of leadership in precision reference design.
The LM4040-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement systems - emphasizing low drift, low noise, and zero-output-capacitor operation.
FAQ
What is the operating temperature range for the LM4040AIM3X-5.0?
The LM4040AIM3X-5.0 is rated for industrial temperature operation from −40°C to +85°C. This range is validated per the 'I' temperature grade in the LM4040-N datasheet (SNOS633K), and applies to all electrical specifications including initial tolerance, temperature coefficient, and dynamic impedance - ensuring full performance compliance across the entire span.
Does the LM4040AIM3X-5.0 require an external output capacitor?
No, the LM4040AIM3X-5.0 does not require an external output capacitor. Its internal design ensures stability with any capacitive load up to 10 nF, eliminating the need for external stabilization components - a key advantage over many competing shunt references that mandate minimum output capacitance.
What is the minimum cathode current needed for regulation in the LM4040AIM3X-5.0?
The LM4040AIM3X-5.0 requires a minimum cathode current of 74 μA to maintain regulation at 5.0 V. This value is specified in Section 6.3 (Recommended Operating Conditions) of the TI datasheet for the 5-V variant and is guaranteed across the full −40°C to +85°C temperature range.
How does the LM4040AIM3X-5.0 achieve ±0.1% initial accuracy?
The LM4040AIM3X-5.0 achieves ±0.1% initial accuracy at 25°C through wafer-level Zener-zap trimming and fuse programming during final test. This process adjusts the reverse breakdown voltage precisely to 5.000 V, and only A-grade parts undergo 100% production testing to verify this tolerance before shipment.
Is the LM4040AIM3X-5.0 compatible with automated SMT assembly processes?
Yes, the LM4040AIM3X-5.0 in SOT-23-3 (DBZ) package is fully compatible with standard reflow soldering profiles, including peak temperatures up to 260°C for 30 seconds as specified in JEDEC J-STD-020. Its moisture sensitivity level (MSL) is 1, allowing unlimited floor life under dry storage conditions.
LM4040AIM3X-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:
- ±0.1%
- 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
LM4040AIM3X-5.0 FAQ
1.How can I place an order for LM4040AIM3X-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIM3X-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 LM4040AIM3X-5.0 reliable?
The price and inventory of LM4040AIM3X-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 LM4040AIM3X-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040AIM3X-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIM3X-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIM3X-5.0?
LM4040AIM3X-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIM3X-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 LM4040AIM3X-5.0?
For technical support, including LM4040AIM3X-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIM3X-5.0 requirements.
6.How does Aetrix verify that LM4040AIM3X-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040AIM3X-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 LM4040AIM3X-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040AIM3X-5.0?
All LM4040AIM3X-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIM3X-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 LM4040AIM3X-5.0 part is unused and in its original packaging.
Return procedure for LM4040AIM3X-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040AIM3X-5.0 Tags
-
TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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