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Analog Devices Inc./Maxim Integrated LM4040CIM3-4.1+T
- Part No.:
- LM4040CIM3-4.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3-4.1+T.pdf
- Description:
- IC VREF SHUNT 4.096V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,670
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Product details
Overview
LM4040CIM3-4.1+T from Maxim Integrated is a precision 4.096V two-terminal shunt voltage reference in SC70-3 package, with ±0.5% initial accuracy, 100ppm/°C max temperature coefficient, and 60μA–15mA operating current range. It delivers stable reverse-breakdown voltage for ADC/DAC biasing, sensor excitation, and portable power monitoring circuits.
For engineers reviewing the LM4040CIM3-4.1+T datasheet, LM4040CIM3-4.1+T pinout, LM4040CIM3-4.1+T application, or LM4040CIM3-4.1+T equivalent, key selection criteria include guaranteed operation from –40°C to +85°C, no external capacitor requirement, low 64µVRMS wideband noise (10Hz–10kHz), and compatibility with capacitive loads up to 1µF.
Technical Context
The LM4040CIM3-4.1+T uses bandgap-based shunt regulation to maintain a precise 4.096V reverse breakdown voltage across its anode and cathode terminals. Its internal laser-trimmed resistor network ensures ±0.5% initial tolerance at +25°C, while the 100ppm/°C tempco guarantees stability over industrial temperature ranges.
It operates as a two-terminal device requiring only a series current-limiting resistor, sinks up to 15mA shunt current, and exhibits low dynamic impedance (≤1.0Ω at 1mA) - enabling accurate voltage referencing even under varying load and supply conditions without output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; ±20mV (±0.5%) initial tolerance at +25°C - enables direct interface with 12-bit ADCs requiring 4.096V full-scale reference. |
| Tempco | Max ±100ppm/°C - ensures ≤±0.42mV drift over –40°C to +85°C, critical for precision analog front-ends. |
| Operating Current | 60μA to 15mA - supports micropower battery operation down to 60μA while maintaining regulation up to 15mA load. |
| Dynamic Impedance | ≤1.0Ω at 1mA, 120Hz - minimizes output voltage variation under transient load changes. |
| Wideband Noise | 64µVRMS (10Hz–10kHz) - low enough for high-resolution data acquisition systems without additional filtering. |
| Temperature Range | –40°C to +85°C - qualified for industrial and extended commercial environments. |
| Package | SC70-3 (1.8mm × 1.8mm) - ultra-small footprint saves PCB space in portable and dense-layout designs. |
Pinout & Package
SC70-3 surface-mount package (1.8mm × 1.8mm), RoHS-compliant, tape-and-reel delivery. Pin 3 is no-connect and must be left unconnected or tied to pin 2 (cathode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode | Positive terminal of shunt reference; connects to current-limiting resistor and load ground return path. |
| 2 (–) | Cathode | Negative terminal; develops regulated 4.096V relative to anode; serves as reference output node. |
| 3 (N.C.) | No Connection | Internally unconnected; must remain floating or tied to pin 2 to avoid parasitic leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 50% smaller than SOT23 equivalents - reduces board area in space-constrained portable electronics. |
| No output capacitor required | Stable with any capacitive load up to 1µF - eliminates BOM cost and layout complexity of external stabilization caps. |
| Low micropower start-up | Minimum operating current of 73μA - enables use in always-on sensor nodes powered by coin cells. |
| Guaranteed industrial temp range | Specified from –40°C to +85°C - supports reliable operation in automotive cabin and industrial control enclosures. |
| Low wideband noise | 64µVRMS (10Hz–10kHz) - preserves signal integrity in 12-bit+ measurement systems without added filtering. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure over weeks on a single CR2032 cell. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for 12-bit SAR ADCs and op-amp signal conditioning stages. Use Value: Enables 12-bit full-scale resolution (1mV LSB) with <±0.5LSB total error across temperature, extending battery life via 60μA minimum operating current. | Use Scenario: 4–20mA loop-powered pressure transmitter operating in factory-floor cabinets at 85°C ambient. IC Role / Device Role / Timing Role: Supplies precision excitation voltage to bridge sensors and reference for DAC-controlled current output stage. Use Value: Maintains ±0.5% accuracy over –40°C to +85°C without derating, eliminating calibration drift in field-deployed units. |
| Medical Wearables | Automotive Body Control Modules |
Use Scenario: ECG patch measuring microvolt-level biopotentials with ultra-low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Reference source for low-noise instrumentation amplifiers and ADCs sampling at 1kSPS. Use Value: 64µVRMS noise floor ensures clean signal acquisition; SC70-3 size fits sub-20mm² wearable PCBs. | Use Scenario: In-cabin lighting controller regulating LED brightness using PWM-driven current sources. IC Role / Device Role / Timing Role: Stable voltage reference for current-sense amplifier feedback and microcontroller ADC monitoring. Use Value: Guaranteed operation to +85°C prevents reference drift during summer cabin heat soak, ensuring consistent LED dimming behavior. |
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; 100ppm/°C tempco; SOT23-3 package. | Requires two external resistors to set 4.096V; higher minimum cathode current (80μA); not pin-compatible. | Select when adjustable reference or higher voltage capability is needed; verify resistor tolerance impact on final accuracy. |
| MAX6008AEUR+T | Fixed 4.096V; 0.2% initial accuracy; 50ppm/°C tempco; SOT23-3 package; higher quiescent current (100μA min). | Superior accuracy and tempco but larger minimum current; same pinout but different electrical behavior under light loads. | Choose for tighter system-level accuracy budgets where 0.2% and 50ppm/°C justify higher power consumption. |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, the LM4040CIM3-4.1+T offers optimal balance of fixed 4.096V convenience, ultra-low 60μA start-up, SC70-3 size, and industrial temperature support - making it ideal for compact, battery-sensitive designs where pin count and board area are constrained.
Availability
LM4040CIM3-4.1+T is available at Aetrix Electronics and suitable for portable data loggers, industrial sensor transmitters, medical wearables, and automotive body control modules requiring stable component supply and long-term design continuity.
Supply support for LM4040CIM3-4.1+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 and mixed-signal ICs for industrial, medical, and communications applications, emphasizing performance, integration, and reliability.
The LM4040 product line delivers micropower, high-accuracy shunt voltage references optimized for space-constrained, battery-operated, and industrial systems demanding stable voltage references without external components.
FAQ
What is the exact output voltage tolerance of the LM4040CIM3-4.1+T at +25°C?
The LM4040CIM3-4.1+T has a nominal output voltage of 4.096V with ±0.5% initial accuracy at +25°C, corresponding to ±20.5mV tolerance (4.0755V to 4.1165V). This is confirmed in the Electrical Characteristics table for the C-grade 4.096V variant under TA = +25°C conditions.
Does the LM4040CIM3-4.1+T require an external capacitor for stability?
No, the LM4040CIM3-4.1+T does not require an external output capacitor and remains stable with any capacitive load up to at least 1µF. This is explicitly stated in the General Description and Applications Information sections, eliminating the need for additional BOM components or layout area.
What is the minimum operating current for the LM4040CIM3-4.1+T, and how does it vary with temperature?
The LM4040CIM3-4.1+T requires a minimum shunt current of 73μA at +25°C (per Electrical Characteristics-4.096V table). This value increases slightly at temperature extremes but remains within 60–73μA across –40°C to +85°C, ensuring reliable start-up in micropower applications.
Can the LM4040CIM3-4.1+T be used in automotive applications requiring AEC-Q100 qualification?
The LM4040CIM3-4.1+T is not AEC-Q100 qualified. Only specific /V suffix variants (e.g., LM4040CIM3-4.1/V+T) are automotive-qualified. For automotive cabin or body control use, select the /V version - the standard LM4040CIM3-4.1+T is rated for industrial temperature range only.
What is the function of Pin 3 on the LM4040CIM3-4.1+T SC70-3 package?
Pin 3 of the LM4040CIM3-4.1+T is labeled N.C. (No Connection) and must be left unconnected or tied to Pin 2 (cathode). It is internally unconnected; connecting it elsewhere may introduce leakage or instability, as specified in the Pin Description and Pin Configuration diagrams.
LM4040CIM3-4.1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040CIM3-4.1+T FAQ
1.How can I place an order for LM4040CIM3-4.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3-4.1+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 LM4040CIM3-4.1+T reliable?
The price and inventory of LM4040CIM3-4.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM3-4.1+T is usually 5 days.
3.What payment methods are accepted for LM4040CIM3-4.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3-4.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3-4.1+T?
LM4040CIM3-4.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3-4.1+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 LM4040CIM3-4.1+T?
For technical support, including LM4040CIM3-4.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3-4.1+T requirements.
6.How does Aetrix verify that LM4040CIM3-4.1+T is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3-4.1+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 LM4040CIM3-4.1+T meets industry standards.
7.What is the process for return or replacement of LM4040CIM3-4.1+T?
All LM4040CIM3-4.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3-4.1+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 LM4040CIM3-4.1+T part is unused and in its original packaging.
Return procedure for LM4040CIM3-4.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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