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Analog Devices Inc./Maxim Integrated LM4040AEM3-3.0/V+T
- Part No.:
- LM4040AEM3-3.0/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040AEM3-3.0/V+T.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
LM4040AEM3-3.0/V+T from Maxim Integrated is a precision 3.000V, 0.1% initial accuracy, two-terminal shunt voltage reference in SC70-3 package, rated for -40°C to +125°C operation with 100ppm/°C max temperature coefficient and 60μA–15mA operating current range. It serves as a stable bandgap reference in space-constrained automotive and industrial power-supply monitoring circuits.
For engineers reviewing the LM4040AEM3-3.0/V+T datasheet, LM4040AEM3-3.0/V+T pinout, LM4040AEM3-3.0/V+T application, or LM4040AEM3-3.0/V+T equivalent, key selection criteria include AEC-Q100 qualification, SC70-3 footprint compatibility, ±3.0mV reverse breakdown tolerance at +25°C, and no-output-capacitor stability across capacitive loads.
Technical Context
The LM4040AEM3-3.0/V+T implements a laser-trimmed bandgap core with internal shunt regulation, delivering fixed 3.000V reverse breakdown voltage without requiring external compensation. Its two-terminal architecture simplifies PCB layout versus series references, while the N.C. pin (Pin 3) must remain unconnected or tied to cathode.
Guaranteed over -40°C to +125°C, it maintains ≤100ppm/°C tempco and ≤0.8Ω dynamic impedance at 1mA, enabling stable reference performance in high-temp automotive ECUs and industrial sensor signal chains where supply headroom is limited and load transients occur.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V nominal; ±3.0mV tolerance at +25°C ensures accurate ADC/DAC biasing in 3.3V systems. |
| Initial Accuracy | 0.1% (Grade A); enables <±3mV absolute error without calibration in battery fuel gauging or sensor front-ends. |
| Tempco | 100ppm/°C max; limits drift to ±12mV over full -40°C to +125°C range-critical for under-hood automotive modules. |
| Operating Current | 60μA to 15mA; supports ultra-low-power sleep modes and high-current regulation in wide-input-range supplies. |
| Dynamic Impedance | 0.8Ω max at 1mA; minimizes output voltage shift during load transients, improving ADC reference stability. |
| Wideband Noise | 45µVRMS (10Hz–10kHz); low enough for 12-bit precision analog measurement without additional filtering. |
| AEC-Q100 Qualification | Qualified per /V suffix; meets stress testing requirements for automotive Grade 1 (-40°C to +125°C junction). |
Pinout & Package
Package: SC70-3 (1.8mm × 1.8mm), RoHS-compliant, tape-and-reel (T). Thermal resistance θJA = 340.4°C/W (four-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode (cathode-side terminal) | Connected to system ground or low-impedance return path; reverse current flows into this pin. |
| 2 (–) | Cathode (reference output) | Provides stable 3.000V reference voltage; connects to ADC REF+, op-amp feedback, or regulator sense node. |
| 3 (N.C.) | No connection | Must be left floating or tied to Pin 2; not internally connected-ensures correct biasing and avoids leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 50% smaller than SOT23; saves >0.5mm² PCB area in portable and automotive modules with tight layout constraints. |
| No output capacitor required | Stable with any capacitive load up to 10µF; eliminates BOM cost and layout risk of external stabilization caps. |
| Wide shunt current range | 60μA minimum ensures operation in nanoamp sleep states; 15mA max supports high-precision active-mode regulation. |
| Low 45µVRMS noise | Enables direct use in 12-bit SAR ADC references without post-filtering-reducing component count and signal path error. |
| AEC-Q100 qualified | /V suffix confirms qualification for automotive Grade 1; validated for thermal cycling, humidity, and vibration per JEDEC standards. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Temperature Sensor Interface |
|---|---|
Use Scenario: Reference for analog front-end measuring coolant or exhaust gas temperature via RTD or thermistor. IC Role / Device Role / Timing Role: Provides stable 3.000V reference to 16-bit sigma-delta ADC sampling sensor bridge output. Use Value: 0.1% initial accuracy and 100ppm/°C tempco ensure <±0.5°C measurement error over full engine operating range. |
Use Scenario: Precision voltage reference in programmable logic controller (PLC) analog input module. IC Role / Device Role / Timing Role: Supplies reference to isolated 24-bit delta-sigma ADC digitizing 4–20mA loop signals. Use Value: Low 45µVRMS noise prevents quantization uncertainty; SC70-3 size fits dense I/O card layouts. |
| Portable Medical Glucose Monitor | Smart Energy Meter Voltage Sensing |
Use Scenario: Reference for electrochemical sensor signal conditioning in handheld blood glucose meters. IC Role / Device Role / Timing Role: Sets bias point for transimpedance amplifier converting amperometric current to voltage. Use Value: 60μA min operating current extends battery life in standby; AEC-Q100-grade reliability supports medical safety certification. |
Use Scenario: Reference for metrology-grade ADC measuring AC mains voltage in Class 0.2 smart meters. IC Role / Device Role / Timing Role: Delivers stable 3.000V to dual-slope or sigma-delta converter for RMS voltage calculation. Use Value: Long-term stability of 120ppm over 1000h ensures meter calibration remains valid across 10-year field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | Adjustable 1.24V–18V output; 0.5% initial accuracy; SOT23-3; no AEC-Q100 qualification. | Requires external resistors to set 3.0V; higher tempco (92ppm/°C typ); unsuitable for automotive under-hood use. | Select only if adjustable output or lower cost is prioritized over automotive qualification and tighter accuracy. |
| MAX6003AEUR+T | Fixed 3.0V; 0.2% initial accuracy; SC70-3; AEC-Q100 qualified; 75ppm/°C max tempco. | Slightly lower accuracy but better tempco; same footprint and automotive rating; optimized for low-noise sensor interfaces. | Prefer when tighter tempco matters more than 0.1% absolute accuracy-e.g., high-precision RTD bridges. |
Compared with TLVH431ACDBVR and MAX6003AEUR+T, the LM4040AEM3-3.0/V+T offers the highest initial accuracy (0.1%) and guaranteed AEC-Q100 compliance in SC70-3, making it optimal for automotive and industrial applications demanding both precision and qualification assurance.
Availability
LM4040AEM3-3.0/V+T is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC analog input modules, portable medical instrumentation, and smart energy metering requiring stable component supply across extended temperature ranges.
Supply support for LM4040AEM3-3.0/V+T 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
Maxim Integrated designs high-performance analog and mixed-signal semiconductor solutions for automotive, industrial, communications, and consumer markets, emphasizing precision, power efficiency, and reliability.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, high-temperature applications where stability, low noise, and qualification compliance are critical-especially in automotive and industrial sensing.
FAQ
What is the maximum operating temperature range for the LM4040AEM3-3.0/V+T?
The LM4040AEM3-3.0/V+T is specified for continuous operation from -40°C to +125°C ambient temperature. Its junction temperature limit is +150°C, and thermal derating begins above +70°C ambient. The /V suffix confirms AEC-Q100 Grade 1 qualification, validating its suitability for under-hood automotive environments where ambient temperatures exceed 105°C.
Does the LM4040AEM3-3.0/V+T require an external output capacitor for stability?
No, the LM4040AEM3-3.0/V+T does not require an external output capacitor. It is inherently stable with any capacitive load-from 0pF to ≥10µF-due to its internal bandgap architecture and low dynamic impedance. This eliminates capacitor-related BOM cost, layout complexity, and potential instability risks associated with ESR or aging effects.
What is the function of Pin 3 (N.C.) on the LM4040AEM3-3.0/V+T?
Pin 3 on the LM4040AEM3-3.0/V+T is designated N.C. (No Connection) and must either be left unconnected or tied directly to Pin 2 (cathode). It is not internally bonded and serves no electrical function; incorrect connection to other nodes may introduce leakage or bias errors. This design simplifies routing in high-density SC70 layouts.
How does the LM4040AEM3-3.0/V+T achieve 0.1% initial accuracy?
The LM4040AEM3-3.0/V+T achieves 0.1% initial accuracy through factory laser trimming of on-chip resistors during final test. This process adjusts the bandgap reference's output to precisely 3.000V at +25°C, resulting in a guaranteed tolerance of ±3.0mV. The trim is non-volatile and stable over time, contributing to the device's 120ppm long-term drift specification after 1000 hours.
Is the LM4040AEM3-3.0/V+T compatible with lead-free reflow soldering processes?
Yes, the LM4040AEM3-3.0/V+T is RoHS-compliant and qualified for lead-free reflow soldering at peak temperatures up to +260°C (per JEDEC J-STD-020). Its SC70-3 package supports standard IPC-A-610 Class 2/3 assembly practices, and the +T suffix indicates tape-and-reel packaging compatible with automated SMT placement equipment.
LM4040AEM3-3.0/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 45µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 67 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040AEM3-3.0/V+T FAQ
1.How can I place an order for LM4040AEM3-3.0/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AEM3-3.0/V+T 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 LM4040AEM3-3.0/V+T reliable?
The price and inventory of LM4040AEM3-3.0/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040AEM3-3.0/V+T is usually 5 days.
3.What payment methods are accepted for LM4040AEM3-3.0/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AEM3-3.0/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AEM3-3.0/V+T?
LM4040AEM3-3.0/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AEM3-3.0/V+T 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 LM4040AEM3-3.0/V+T?
For technical support, including LM4040AEM3-3.0/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AEM3-3.0/V+T requirements.
6.How does Aetrix verify that LM4040AEM3-3.0/V+T is sourced from the original manufacturer or authorized distributors?
All LM4040AEM3-3.0/V+T 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 LM4040AEM3-3.0/V+T meets industry standards.
7.What is the process for return or replacement of LM4040AEM3-3.0/V+T?
All LM4040AEM3-3.0/V+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AEM3-3.0/V+T, 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 LM4040AEM3-3.0/V+T part is unused and in its original packaging.
Return procedure for LM4040AEM3-3.0/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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