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Analog Devices Inc./Maxim Integrated LM4040DIM3-2.5+T
- Part No.:
- LM4040DIM3-2.5+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DIM3-2.5+T.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:14,685
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Product details
Overview
LM4040DIM3-2.5+T from Maxim Integrated is a precision 2.500V fixed-output, two-terminal shunt voltage reference in SC70-3 package, featuring ±1.0% initial accuracy, ±150ppm/°C temperature coefficient, 60μA–15mA operating current range, and guaranteed operation from –40°C to +85°C. It delivers stable reverse-breakdown voltage for analog-to-digital converter (ADC) reference circuits in portable instrumentation.
For engineers reviewing the LM4040DIM3-2.5+T datasheet, LM4040DIM3-2.5+T pinout, LM4040DIM3-2.5+T application, or LM4040DIM3-2.5+T equivalent, key selection criteria include shunt current capability, temperature coefficient over industrial temperature range, no-output-capacitor stability, and SC70 footprint compatibility with space-constrained PCB layouts.
Technical Context
The LM4040DIM3-2.5+T uses bandgap-based shunt regulation to maintain a precise 2.500V reverse breakdown voltage across its terminals when biased with 60μA to 15mA cathode-to-anode current. Its internal laser-trimmed resistor network ensures initial accuracy within ±1.0% at +25°C.
It exhibits low dynamic impedance (≤1.1Ω at 1mA), wideband output noise of 35µVRMS (10Hz–10kHz), and stable performance under capacitive loads without external compensation-enabling direct integration into high-precision sensor signal chains and data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V nominal; min/max = 2.475V / 2.525V at +25°C (±1.0% grade) |
| Initial Accuracy | ±1.0% at +25°C - defines maximum absolute error before temperature drift or aging |
| Temp. Coefficient | ±150ppm/°C max - contributes ≤±12.0mV error over –40°C to +85°C span |
| Operating Current | 60μA to 15mA - supports ultra-low-power sensing and high-current reference buffering |
| Dynamic Impedance | ≤1.1Ω at 1mA - ensures <1mV output shift under 1mA load transients |
| Output Noise | 35µVRMS (10Hz–10kHz) - critical for 16-bit+ ADC reference stability |
| Long-Term Stability | 120ppm after 1000h - quantifies voltage drift due to semiconductor aging |
Pinout & Package
LM4040DIM3-2.5+T is housed in a RoHS-compliant, lead(Pb)-free 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23 equivalents. Thermal resistance θJA = 340.4°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Positive terminal (cathode) | Reverse-biased connection point; sinks shunt current to maintain 2.500V reference |
| 2 (–) | Negative terminal (anode) | Reference ground node; forms voltage drop with Pin 1 to define VREF |
| 3 (N.C.) | No connection | Must remain unconnected or tied to Pin 2; no internal function or electrical path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint enables placement in dense portable PCBs (e.g., handheld meters) |
| No output capacitor required | Internally compensated for stability with any capacitive load - eliminates BOM cost and layout risk |
| Wide shunt current range | 60μA–15mA operation allows use from micropower battery monitoring to active reference buffering |
| Guaranteed –40°C to +85°C operation | Validated performance across full industrial temperature range without derating |
| Low 35µVRMS noise | Enables high-resolution ADC reference without external filtering or post-regulation |
Applications
| Portable Instrumentation | Industrial Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC requiring stable reference under varying battery voltage. IC Role / Device Role / Timing Role: Two-terminal shunt reference providing 2.500V precision voltage for ADC conversion reference. Use Value: ±1.0% initial accuracy and ±150ppm/°C TC ensure <±0.5 LSB error over temperature without calibration. |
Use Scenario: Modular PLC analog input module measuring 4–20mA sensor signals. IC Role / Device Role / Timing Role: Primary voltage reference for isolated sigma-delta ADC front-end. Use Value: 60μA minimum operating current enables low-quiescent design; SC70 size fits tight channel spacing. |
| Automotive Body Control | Battery-Powered IoT Sensors |
Use Scenario: In-cabin temperature/humidity sensor node with microcontroller ADC. IC Role / Device Role / Timing Role: Shunt reference supplying stable 2.500V to MCU's internal ADC reference input. Use Value: No-output-capacitor stability simplifies layout in EMI-sensitive automotive environments. |
Use Scenario: Wireless environmental sensor node powered by coin-cell battery. IC Role / Device Role / Timing Role: Micropower voltage reference for low-drift sensor excitation and ADC reference. Use Value: 60μA start-up current extends battery life beyond 5 years in sleep-active cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C25IDBZR | 2.5V ±0.5%, ±50ppm/°C, SOT23-3, 75μA–15mA | Higher accuracy and lower TC, but larger SOT23 footprint and higher minimum current | Select when tighter TC and accuracy justify larger board area and higher quiescent current |
| MAX6008AEUR+T | 2.5V ±0.2%, ±75ppm/°C, SOT23-3, 100μA–10mA | Superior initial accuracy and TC, but narrower current range and higher min current | Prefer for high-precision sensor interfaces where 0.2% tolerance is mandatory and 100μA start-up is acceptable |
Compared with LM4040DIM3-2.5+T, TL4050C25IDBZR offers better TC and accuracy at the cost of larger footprint and higher minimum current, while MAX6008AEUR+T provides tighter tolerance but sacrifices low-current operation - making LM4040DIM3-2.5+T optimal for cost-sensitive, space-constrained, micropower designs.
Availability
LM4040DIM3-2.5+T is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and battery-powered IoT sensors requiring stable component supply with consistent SC70-3 packaging and RoHS compliance.
Supply support for LM4040DIM3-2.5+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, automotive, and communications applications, with emphasis on high-reliability, low-power, and small-footprint solutions.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement systems - targeting applications where stability, low noise, and minimal external components are essential.
FAQ
What is the guaranteed operating temperature range for LM4040DIM3-2.5+T?
The LM4040DIM3-2.5+T is specified and guaranteed over –40°C to +85°C. This industrial-grade temperature range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet. The device maintains its ±1.0% initial accuracy and ±150ppm/°C temperature coefficient across this full range without derating.
Does LM4040DIM3-2.5+T require an external output capacitor for stability?
No, LM4040DIM3-2.5+T does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback networks. This eliminates BOM cost, layout complexity, and potential resonance issues associated with external capacitance.
What is the minimum shunt current needed for LM4040DIM3-2.5+T to regulate properly?
The LM4040DIM3-2.5+T requires a minimum shunt current of 60μA to maintain regulation. This value is explicitly stated in the Electrical Characteristics table for the D-grade (1.0% accuracy) variant and verified across the –40°C to +85°C temperature range. Below 60μA, output voltage deviates outside specification.
Can LM4040DIM3-2.5+T be used in automotive applications?
The LM4040DIM3-2.5+T is rated for –40°C to +85°C and is not AEC-Q100 qualified. For automotive applications requiring qualification, select variants with "/V" suffix (e.g., LM4040DIM3-2.5/V+T), which are explicitly listed as AEC-Q100 qualified in the Ordering Information table. LM4040DIM3-2.5+T remains suitable for non-safety-critical body electronics where qualification is not mandated.
What is the purpose of Pin 3 (N.C.) on LM4040DIM3-2.5+T?
Pin 3 on LM4040DIM3-2.5+T is designated N.C. (No Connection) and must either remain unconnected or be tied directly to Pin 2 (anode). It has no internal function or electrical path. Connecting Pin 3 to Pin 2 is electrically safe and may improve mechanical robustness during reflow, but leaving it floating is also fully compliant per the Pin Configuration diagram and datasheet instructions.
LM4040DIM3-2.5+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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 70 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DIM3-2.5+T FAQ
1.How can I place an order for LM4040DIM3-2.5+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIM3-2.5+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 LM4040DIM3-2.5+T reliable?
The price and inventory of LM4040DIM3-2.5+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DIM3-2.5+T is usually 5 days.
3.What payment methods are accepted for LM4040DIM3-2.5+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIM3-2.5+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIM3-2.5+T?
LM4040DIM3-2.5+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIM3-2.5+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 LM4040DIM3-2.5+T?
For technical support, including LM4040DIM3-2.5+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIM3-2.5+T requirements.
6.How does Aetrix verify that LM4040DIM3-2.5+T is sourced from the original manufacturer or authorized distributors?
All LM4040DIM3-2.5+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 LM4040DIM3-2.5+T meets industry standards.
7.What is the process for return or replacement of LM4040DIM3-2.5+T?
All LM4040DIM3-2.5+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIM3-2.5+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 LM4040DIM3-2.5+T part is unused and in its original packaging.
Return procedure for LM4040DIM3-2.5+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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