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Analog Devices Inc./Maxim Integrated LM4040DEM3-4.1-T
- Part No.:
- LM4040DEM3-4.1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DEM3-4.1-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:9,225
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Product details
Overview
LM4040DEM3-4.1-T from Maxim Integrated is a precision 4.096V two-terminal shunt voltage reference in SC70-3 package, featuring 1.0% initial accuracy, ±150ppm/°C temperature coefficient, and guaranteed operation from -40°C to +125°C. It delivers stable reverse breakdown voltage across 50µA–15mA shunt current with low 1.3Ω dynamic impedance and 64µVRMS wideband noise (10Hz–10kHz), ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4040DEM3-4.1-T datasheet, LM4040DEM3-4.1-T pinout, LM4040DEM3-4.1-T application, or LM4040DEM3-4.1-T equivalent, key selection criteria include its 4.096V nominal output, SC70-3 footprint compatibility, extended temperature range, and absence of required output capacitance-critical for space-constrained, battery-powered designs requiring long-term stability.
Technical Context
The LM4040DEM3-4.1-T uses bandgap-based shunt regulation to maintain a precise 4.096V reverse breakdown voltage without external capacitors. Its internal architecture ensures stability under capacitive loads up to 1µF and supports operation over full industrial temperature range (-40°C to +125°C) with guaranteed 1.0% initial tolerance.
It functions as a two-terminal device: cathode (Pin 1) and anode (Pin 2), with Pin 3 unconnected. The device draws only 50µA minimum operating current and sustains regulation up to 15mA shunt current while maintaining low dynamic impedance (≤1.3Ω at 1mA) and low output noise (64µVRMS).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; ±41mV max tolerance at +25°C (D-grade), enabling direct use with 12-bit ADCs requiring 1 LSB = 1mV |
| Initial Accuracy | ±1.0% (D-grade); ±41mV over temperature, suitable for applications where absolute voltage calibration is performed in-system |
| Tempco | ±150ppm/°C max; ±100mV drift over -40°C to +125°C, critical for thermal-stable sensor front-ends |
| Shunt Current Range | 50µA to 15mA; supports ultra-low-power sleep modes and high-current precision references in same design |
| Dynamic Impedance | ≤1.3Ω at 1mA; ensures <13mV output shift for 10mA load transients, vital for stable DAC reference rails |
| Wideband Noise | 64µVRMS (10Hz–10kHz); limits quantization error in 16-bit data acquisition systems |
| Operating Temp Range | -40°C to +125°C; qualified for automotive under-hood and industrial control environments |
Pinout & Package
LM4040DEM3-4.1-T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23 equivalents. Pin 3 is no-connect and must remain unconnected or tied to Pin 2 (anode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Cathode | Reverse-biased terminal; connects to regulated voltage node; sinks shunt current to maintain 4.096V |
| Pin 2 (–) | Anode | Reference ground return path; forms two-terminal configuration with Pin 1 |
| Pin 3 (N.C.) | No Connection | Must be left floating or shorted to Pin 2; no internal connection; omission prevents misrouting |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% PCB space vs. SOT23, enabling dense portable PCB layouts |
| No output capacitor required | Stable with any capacitive load up to 1µF, eliminating BOM cost and layout constraints for decoupling |
| Extended temperature qualification | Guaranteed performance from -40°C to +125°C, supporting automotive and industrial deployment without derating |
| Low quiescent current capability | Operates down to 50µA shunt current, enabling microamp-level system sleep modes with reference retention |
| High long-term stability | 120ppm drift after 1000 hours, reducing recalibration frequency in field-deployed test equipment |
Applications
| Portable Data Loggers | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure over weeks on coin-cell power. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for 12-bit SAR ADCs converting analog sensor outputs. Use Value: Enables 1mV resolution with ±41mV absolute accuracy and minimal current draw (50µA min), extending battery life beyond 6 months. | Use Scenario: 4–20mA loop-powered transmitters in factory automation with ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Supplies precision reference for current-output DAC and sensor excitation circuitry. Use Value: Maintains ±100mV output drift over full temperature range, ensuring <0.25% full-scale error in calibrated 4–20mA output. |
| Medical Point-of-Care Devices | Automotive Cabin Control Units |
Use Scenario: Handheld blood glucose meters requiring clinical-grade accuracy and FDA-compliant long-term stability. IC Role / Device Role / Timing Role: Reference source for analog front-end amplifiers and ADCs measuring electrochemical sensor currents. Use Value: 120ppm 1000-hour drift and ±1.0% initial tolerance meet IEC 60601-2-40 accuracy requirements for Class IIb devices. | Use Scenario: HVAC control modules inside vehicle dashboards exposed to ambient swings from -40°C to +105°C. IC Role / Device Role / Timing Role: Voltage reference for microcontroller ADCs monitoring cabin temperature, fan speed, and air quality sensors. Use Value: Qualified to -40°C to +125°C with ±150ppm/°C tempco ensures <±1.5% reference error across full automotive temperature profile. |
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 tempco; SOT23-3 | Requires external resistor divider; higher minimum cathode current (80µA); not pin-compatible | Select when adjustable reference or tighter tempco is needed, accepting added component count and layout changes |
| ADR3440ARJZ-R7 | Fixed 4.096V; 0.1% initial accuracy; 10ppm/°C tempco; SOT23-5 (with enable) | Three-terminal series reference; requires bypass capacitor; higher quiescent current (120µA) | Choose for ultra-high precision (<±0.5mV) where board space allows larger SOT23-5 and additional decoupling |
Compared with TLVH431ACDBVR and ADR3440ARJZ-R7, the LM4040DEM3-4.1-T offers the smallest footprint, lowest minimum operating current, and true two-terminal simplicity-making it optimal for space- and power-constrained shunt reference roles where ±41mV absolute accuracy suffices.
Availability
LM4040DEM3-4.1-T is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, medical diagnostics, and automotive cabin electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4040DEM3-4.1-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, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and medical applications.
The LM4040 product line delivers micropower, high-accuracy shunt voltage references optimized for space-constrained, battery-operated, and thermally harsh systems requiring stable reference voltages without external components.
FAQ
What is the exact output voltage tolerance of LM4040DEM3-4.1-T at room temperature?
The LM4040DEM3-4.1-T has a nominal output voltage of 4.096V with a maximum tolerance of ±41mV at +25°C (D-grade specification). This corresponds to ±1.0% initial accuracy, verified across 100% production testing per Maxim's datasheet Electrical Characteristics table for the 4.096V variant.
Does LM4040DEM3-4.1-T require an external output capacitor for stability?
No, the LM4040DEM3-4.1-T does not require an external output capacitor. Its internal design ensures stability with any capacitive load-including 0µF up to 1µF-as confirmed in the Applications Information section and Typical Operating Characteristics. This eliminates BOM cost and layout complexity.
What is the minimum shunt current needed for LM4040DEM3-4.1-T to regulate properly?
The LM4040DEM3-4.1-T requires a minimum shunt current of 50µA to maintain regulation across its full temperature range (-40°C to +125°C), as specified in the Electrical Characteristics table for the 4.096V D-grade variant. Below this, output voltage may deviate beyond guaranteed limits.
Can LM4040DEM3-4.1-T be used in automotive under-hood applications?
Yes, the LM4040DEM3-4.1-T is rated for -40°C to +125°C operation and is qualified for extended temperature industrial use. While not AEC-Q200 certified, its guaranteed performance across this range makes it suitable for non-safety-critical automotive cabin and under-hood applications where full automotive qualification is not mandated.
What is the purpose of Pin 3 on LM4040DEM3-4.1-T?
Pin 3 on the LM4040DEM3-4.1-T is labeled N.C. (No Connection) and must be left unconnected or tied to Pin 2 (anode). It has no internal connection and serves only as a mechanical pad; connecting it elsewhere risks incorrect operation or damage per the official pin configuration diagram.
LM4040DEM3-4.1-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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 64µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 78 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DEM3-4.1-T FAQ
1.How can I place an order for LM4040DEM3-4.1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEM3-4.1-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 LM4040DEM3-4.1-T reliable?
The price and inventory of LM4040DEM3-4.1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DEM3-4.1-T is usually 5 days.
3.What payment methods are accepted for LM4040DEM3-4.1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEM3-4.1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEM3-4.1-T?
LM4040DEM3-4.1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEM3-4.1-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 LM4040DEM3-4.1-T?
For technical support, including LM4040DEM3-4.1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEM3-4.1-T requirements.
6.How does Aetrix verify that LM4040DEM3-4.1-T is sourced from the original manufacturer or authorized distributors?
All LM4040DEM3-4.1-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 LM4040DEM3-4.1-T meets industry standards.
7.What is the process for return or replacement of LM4040DEM3-4.1-T?
All LM4040DEM3-4.1-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEM3-4.1-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 LM4040DEM3-4.1-T part is unused and in its original packaging.
Return procedure for LM4040DEM3-4.1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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