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Analog Devices Inc./Maxim Integrated LM4040AEM3-3.0-T
- Part No.:
- LM4040AEM3-3.0-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040AEM3-3.0-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:4,960
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Product details
Overview
LM4040AEM3-3.0-T from Maxim Integrated is a precision 3.000V two-terminal shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±100ppm/°C temperature coefficient over –40°C to +125°C, 60μA–15mA operating current range, and 45µVRMS wideband noise (10Hz–10kHz). It enables stable ADC/DAC biasing and sensor excitation in space-constrained industrial and portable systems.
For engineers reviewing the LM4040AEM3-3.0-T datasheet, LM4040AEM3-3.0-T pinout, LM4040AEM3-3.0-T application, or LM4040AEM3-3.0-T equivalent, key selection criteria include guaranteed extended-temperature operation, no-output-capacitor stability, low dynamic impedance (≤0.8Ω), and compatibility with high-impedance source networks in battery-powered instrumentation.
Technical Context
The LM4040AEM3-3.0-T uses laser-trimmed bandgap circuitry to maintain precise reverse breakdown voltage under varying load and temperature conditions. Its internal architecture eliminates need for external stabilization capacitors while tolerating arbitrary output capacitance-critical for compact PCB layouts where layout parasitics dominate.
Designed for shunt-mode regulation, it sinks current between cathode (Pin 1) and anode (Pin 2) to hold 3.000V ±3.0mV at +25°C, with long-term drift limited to 120ppm over 1000 hours. The N.C. Pin 3 must remain unconnected or tied to Pin 2 per datasheet specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V ±3.0mV at +25°C - ensures ≤0.1% error in 12-bit ADC reference paths |
| Initial Accuracy | 0.1% max - guarantees absolute voltage tolerance without system-level trimming |
| Temp Coefficient | ±100ppm/°C max - limits drift to ±12mV across full –40°C to +125°C range |
| Operating Current | 60μA to 15mA - supports micropower sleep modes and high-current regulation simultaneously |
| Dynamic Impedance | ≤0.8Ω at 1mA - maintains <1mV output shift under 1mA load transients |
| Wideband Noise | 45µVRMS (10Hz–10kHz) - suitable for 16-bit SAR ADC references without filtering |
| Long-Term Stability | 120ppm over 1000h - reduces calibration frequency in field-deployed equipment |
Pinout & Package
SC70-3 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23-3, rated for –40°C to +125°C operation with 174mW power dissipation at +70°C (derated 2.17mW/°C above).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-bias input terminal; connects to higher-potential node of source resistor |
| 2 (–) | Anode | Reference ground return; establishes 0V reference point for regulated output |
| 3 (N.C.) | No Connection | Must be left floating or shorted to Pin 2; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | Enables placement in <2mm² board area-ideal for wearables and modular sensors |
| No output capacitor required | Eliminates BOM cost and layout risk associated with ESR-sensitive ceramic caps |
| Capacitive load tolerance | Stable with any output capacitance-simplifies EMI filtering and bypass design |
| Extended temperature grade | Specified over –40°C to +125°C-supports under-hood automotive and industrial edge nodes |
| Low 45µVRMS noise | Meets SNR requirements for 16-bit data acquisition without post-regulation filtering |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous glucose monitor with integrated 14-bit ADC and lithium coin-cell supply. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.000V excitation for electrochemical sensor and ADC VREF. Use Value: 0.1% initial accuracy and ±100ppm/°C TC ensure <0.5% total measurement error across body-temperature range. | Use Scenario: Remote environmental sensor node logging temperature/humidity every 10 minutes on AA batteries. IC Role / Device Role / Timing Role: Low-quiescent shunt reference enabling 60μA minimum operating current during deep-sleep cycles. Use Value: Micropower operation extends battery life to >5 years; SC70-3 footprint minimizes PCB real estate. |
| Industrial Process Transmitters | Automotive Cabin Control Modules |
Use Scenario: 4–20mA loop-powered pressure transmitter operating in factory ambient up to +85°C. IC Role / Device Role / Timing Role: Precision voltage reference for DAC generating loop current setpoint. Use Value: Guaranteed performance over –40°C to +125°C allows same BOM for indoor/outdoor variants; 120ppm long-term stability reduces recalibration intervals. | Use Scenario: HVAC control unit mounted near vehicle dashboard with ambient swings from –40°C to +85°C. IC Role / Device Role / Timing Role: Reference for microcontroller ADC measuring thermistor and potentiometer inputs. Use Value: Extended-temperature grade eliminates derating concerns; no-output-capacitor design avoids cold-temperature capacitor failure modes. |
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; 90ppm/°C TC; SOT23-3 | Requires external resistors for 3.0V setting; higher minimum cathode current (80μA) | Choose when adjustable output or higher voltage capability is needed; verify layout for resistor placement and thermal coupling |
| MAX6003AEUR+T | Fixed 3.0V; 0.2% initial accuracy; 75ppm/°C TC; SOT23-3; 1.8–18V supply range | Series topology (not shunt); requires input voltage ≥3.0V + dropout; higher quiescent current (35μA) | Prefer for low-noise series references where input headroom permits; avoid in shunt-configured legacy circuits |
Compared with TLVH431ACDBVR and MAX6003AEUR+T, the LM4040AEM3-3.0-T offers superior initial accuracy (0.1% vs. 0.2–0.5%), true shunt operation enabling direct connection to high-impedance sources, and smallest available footprint-making it optimal for ultra-compact, fixed-voltage, micropower reference designs.
Availability
LM4040AEM3-3.0-T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for LM4040AEM3-3.0-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 is a semiconductor company specializing in analog and mixed-signal ICs for power management, sensing, and communications applications.
The LM4040 product line delivers precision shunt voltage references optimized for space-constrained, micropower, and extended-temperature applications-including portable instrumentation, industrial automation, and automotive subsystems.
FAQ
What is the maximum junction temperature rating for LM4040AEM3-3.0-T?
The LM4040AEM3-3.0-T has a maximum junction temperature of +150°C. Its extended-temperature grade is rated for operation from –40°C to +125°C ambient, and the SC70-3 package's thermal derating begins at +70°C (2.17mW/°C). At 15mA shunt current and 3.0V output, power dissipation is 45mW-well within safe thermal limits even at maximum ambient.
Can LM4040AEM3-3.0-T operate without an output capacitor?
Yes, the LM4040AEM3-3.0-T is explicitly designed to be stable without any output capacitor and tolerates arbitrary capacitive loads. This eliminates capacitor-related failures, simplifies layout, and reduces BOM count-particularly valuable in high-reliability or miniaturized designs where ceramic capacitor aging or microphonics are concerns.
What is the minimum operating current for LM4040AEM3-3.0-T?
The LM4040AEM3-3.0-T requires a minimum shunt current of 60μA to maintain regulation. Below this threshold, output voltage deviates from specification. The datasheet specifies IRMIN = 67μA typical at +25°C for the A-grade 3.0V variant, with guaranteed operation down to 60μA across the full temperature range.
How does the N.C. pin (Pin 3) affect LM4040AEM3-3.0-T functionality?
Pin 3 of the LM4040AEM3-3.0-T is a no-connect terminal with no internal bond. It must either remain unconnected or be tied directly to Pin 2 (anode). Leaving it floating or connecting it to other potentials may cause unpredictable behavior or damage. This configuration is mandatory per the official pin description and top-marking documentation.
Is LM4040AEM3-3.0-T compatible with lead-free reflow soldering processes?
Yes, the LM4040AEM3-3.0-T is RoHS-compliant and qualified for lead-free reflow soldering at +260°C peak temperature (per JEDEC J-STD-020). Its SC70-3 package meets standard moisture sensitivity level (MSL) requirements, and the device withstands soldering thermal profiles without parameter shift or reliability degradation.
LM4040AEM3-3.0-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- ±0.1%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040AEM3-3.0-T FAQ
1.How can I place an order for LM4040AEM3-3.0-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AEM3-3.0-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-T reliable?
The price and inventory of LM4040AEM3-3.0-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-T is usually 5 days.
3.What payment methods are accepted for LM4040AEM3-3.0-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AEM3-3.0-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AEM3-3.0-T?
LM4040AEM3-3.0-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AEM3-3.0-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-T?
For technical support, including LM4040AEM3-3.0-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-T requirements.
6.How does Aetrix verify that LM4040AEM3-3.0-T is sourced from the original manufacturer or authorized distributors?
All LM4040AEM3-3.0-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-T meets industry standards.
7.What is the process for return or replacement of LM4040AEM3-3.0-T?
All LM4040AEM3-3.0-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AEM3-3.0-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-T part is unused and in its original packaging.
Return procedure for LM4040AEM3-3.0-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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