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Texas Instruments LM4040AIM3-5.0
- Part No.:
- LM4040AIM3-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040AIM3-5.0.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,035
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Product details
Overview
LM4040AIM3-5.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 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 LM4040AIM3-5.0 datasheet, LM4040AIM3-5.0 pinout, LM4040AIM3-5.0 application, or LM4040AIM3-5.0 equivalent, this page provides verified specifications, validated SOT-23 pin mapping, confirmed industrial temperature range (−40°C to +85°C), and two rigorously cross-referenced alternative parts for voltage reference design-in.
Technical Context
The LM4040AIM3-5.0 operates as a two-terminal shunt reference: cathode accepts input current and regulates output voltage across anode-to-cathode terminals. Its bandgap-derived Zener-zap trimmed structure achieves ±0.1% accuracy at 25°C and maintains stability over 60 μA–15 mA operating current range.
It requires no external capacitor, tolerates capacitive loads up to 10 nF, and exhibits low 35 μVRMS wideband noise (10 Hz–10 kHz) and 0.8 mV typical load regulation (1 mA step). 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 non-adjustable |
| Initial Tolerance | ±0.1% at 25°C (A grade), enabling high-accuracy 12-bit+ data conversion systems |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C, ensuring <±19 mV drift across full industrial range |
| Operating Current | 74 μA min / 15 mA max, supporting ultra-low-power battery operation and robust load drive |
| Dynamic Impedance | 0.8 Ω typical at 1 mA, minimizing output voltage shift under dynamic load transients |
| Wideband Noise | 35 μVRMS (10 Hz–10 kHz), suitable for precision analog signal chains without added filtering |
| Long-Term Stability | 120 ppm after 1000 hours, critical for uncalibrated field-deployed instrumentation |
Pinout & Package
SOT-23 (DBZ) 3-pin surface-mount package: 2.92 mm × 1.30 mm body, JEDEC MO-178AA compliant, rated for 306 mW power dissipation at 25°C ambient.
| 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 series resistor current; voltage develops between Cathode and Anode |
| NC (Pin 3) | No-connect terminal | Must be left floating or tied to Anode (Pin 2); no internal connection |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables direct integration into space-constrained PCB layouts without stability compromises |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance, eliminating need for isolation resistors in ADC reference paths |
| Fuse-and-Zener-zap trimming | Ensures ±0.1% initial accuracy at wafer sort, reducing post-package calibration overhead |
| Low quiescent current | 74 μA minimum operating current enables >10-year battery life in coin-cell-powered sensors |
| Bandgap curvature correction | Flattens voltage vs. temperature curve, achieving ≤100 ppm/°C TC across full industrial range |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and auto-ranging front-end. IC Role / Device Role / Timing Role: Provides stable 5.0 V reference for ADC full-scale calibration and sensor excitation. Use Value: ±0.1% initial tolerance and 100 ppm/°C TC ensure measurement repeatability across battery discharge and ambient temperature shifts. |
Use Scenario: Industrial PLC analog input module sampling 8 channels at 10 kSPS. IC Role / Device Role / Timing Role: Supplies common reference to multiplexed precision op-amp buffers and 24-bit delta-sigma ADC. Use Value: 35 μVRMS noise and 0.8 Ω dynamic impedance prevent reference-induced quantization error and crosstalk. |
| Energy Management Meters | Automotive Body Control Modules |
Use Scenario: DIN-rail mounted kWh meter with metrology-grade current/voltage sensing. IC Role / Device Role / Timing Role: References isolated sigma-delta modulators and anti-aliasing filters in Class 0.2 metering path. Use Value: 120 ppm long-term stability eliminates annual recalibration; −40°C to +85°C rating supports outdoor enclosure deployment. |
Use Scenario: 12 V battery-supplied BCM monitoring door lock actuators and interior lighting PWM drivers. IC Role / Device Role / Timing Role: Supplies reference to microcontroller ADC for battery voltage monitoring and thermal sensor readback. Use Value: 74 μA min operating current allows continuous monitoring during sleep mode; SOT-23 footprint fits tight board real estate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3050AIDBZR | 5.0 V series reference; 50 ppm/°C TC; 50 μA quiescent current; requires input capacitor | Higher accuracy but needs external decoupling; not drop-in due to 3-pin series topology and different pinout | Select when lower TC and tighter long-term drift (<50 ppm) outweigh layout complexity and BOM cost |
| ADR3450ARJZ-R7 | 5.0 V series reference; 30 ppm/°C TC; 120 μA quiescent current; 10 μVRMS noise | Superior noise and TC, but higher supply current and incompatible 3-terminal series architecture | Prefer for ultra-low-noise sensor interfaces where PCB area permits dedicated input/output routing |
Compared with REF3050AIDBZR and ADR3450ARJZ-R7, the LM4040AIM3-5.0 offers true two-terminal simplicity, zero external components, and lowest system-level BOM count - making it optimal for cost-sensitive, space-constrained shunt reference use cases where ±0.1% initial accuracy suffices.
Availability
LM4040AIM3-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, energy metering, and automotive body control modules requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4040AIM3-5.0 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 leadership in precision reference design.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and industrial-grade measurement systems demanding high initial accuracy and low temperature drift.
FAQ
What is the maximum operating current for LM4040AIM3-5.0?
The LM4040AIM3-5.0 supports a maximum operating current of 15 mA, as specified in the Recommended Operating Conditions table. This limit ensures safe power dissipation within the SOT-23 package's 306 mW rating at 25°C ambient. Exceeding 15 mA risks thermal overload and parametric shift. The LM4040AIM3-5.0 must be used with a series current-limiting resistor sized to keep cathode current within this bound under worst-case input voltage conditions.
Does LM4040AIM3-5.0 require an external capacitor for stability?
No, the LM4040AIM3-5.0 does not require an external capacitor for stability - its internal design eliminates the need for output capacitance. It remains stable with capacitive loads up to 10 nF, making it ideal for direct connection to ADC reference inputs or op-amp feedback networks without isolation resistors. This feature simplifies layout and reduces BOM count versus traditional shunt references. The LM4040AIM3-5.0 achieves this via advanced bandgap curvature compensation and low dynamic impedance.
What is the temperature coefficient specification for LM4040AIM3-5.0?
The LM4040AIM3-5.0 has a maximum average temperature coefficient of 100 ppm/°C over the industrial temperature range (−40°C to +85°C). This translates to a total voltage drift of ±19 mV across that range, calculated as 5.0 V × 0.75% (0.1% initial tolerance + 100 ppm/°C × 65°C). The LM4040AIM3-5.0 achieves this performance through bandgap-derived curvature correction and Zener-zap trimming, ensuring predictable behavior in thermally varying environments.
Can LM4040AIM3-5.0 be used in automotive applications?
The LM4040AIM3-5.0 is qualified for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 certified. For automotive applications requiring AEC-Q100 Grade 3 qualification, TI offers the LM4040QAIM3-5.0 - a pin-compatible variant with identical electrical specs and extended reliability testing. The standard LM4040AIM3-5.0 may be used in non-safety-critical automotive subsystems (e.g., infotainment power rails) only after full system-level validation. Always verify compliance with ISO/TS 16949 requirements before deploying the LM4040AIM3-5.0 in vehicle platforms.
What is the minimum operating current for LM4040AIM3-5.0?
The LM4040AIM3-5.0 requires a minimum operating current of 74 μA at 25°C to maintain regulation within specification, per Electrical Characteristics Table 6.16. Below this threshold, output voltage deviates from 5.0 V and temperature coefficient degrades. At full temperature range (−40°C to +85°C), the minimum increases to 85 μA. Designers must size the series current-limiting resistor to guarantee this current under lowest input voltage and highest temperature conditions. The LM4040AIM3-5.0's micropower capability makes it suitable for ultra-low-current systems like wireless sensor nodes.
LM4040AIM3-5.0 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
LM4040AIM3-5.0 FAQ
1.How can I place an order for LM4040AIM3-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIM3-5.0 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 LM4040AIM3-5.0 reliable?
The price and inventory of LM4040AIM3-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040AIM3-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040AIM3-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIM3-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIM3-5.0?
LM4040AIM3-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIM3-5.0 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 LM4040AIM3-5.0?
For technical support, including LM4040AIM3-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIM3-5.0 requirements.
6.How does Aetrix verify that LM4040AIM3-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040AIM3-5.0 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 LM4040AIM3-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040AIM3-5.0?
All LM4040AIM3-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIM3-5.0, 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 LM4040AIM3-5.0 part is unused and in its original packaging.
Return procedure for LM4040AIM3-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040AIM3-5.0 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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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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