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Analog Devices Inc./Maxim Integrated LM4040BIM3-2.5/V+T
- Part No.:
- LM4040BIM3-2.5/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BIM3-2.5/V+T.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
LM4040BIM3-2.5/V+T from Maxim Integrated is a precision 2.500V two-terminal shunt voltage reference in SOT23-3 package, featuring ±0.2% initial accuracy, 100ppm/°C max temperature coefficient, and guaranteed operation from −40°C to +125°C. It delivers stable reverse breakdown voltage across 60μA–15mA shunt current with low 0.8Ω dynamic impedance, enabling use in automotive sensor signal conditioning and high-reliability industrial power monitoring circuits.
For engineers reviewing the LM4040BIM3-2.5/V+T datasheet, LM4040BIM3-2.5/V+T pinout, LM4040BIM3-2.5/V+T application, or LM4040BIM3-2.5/V+T equivalent, key selection criteria include AEC-Q100 qualification, no-output-capacitor stability, ultra-low 35µVRMS noise (10Hz–10kHz), and compatibility with capacitive loads in space-constrained designs.
Technical Context
The LM4040BIM3-2.5/V+T implements a laser-trimmed bandgap reference core with internal pass transistor, operating as a two-terminal shunt device that maintains precise 2.500V output when reverse-biased between 60μA and 15mA. Its architecture eliminates need for external stabilization capacitors while tolerating any output capacitance.
Guaranteed over −40°C to +125°C, it achieves ±0.2% initial accuracy and ≤100ppm/°C tempco via on-chip trimming and thermal compensation. The /V suffix confirms AEC-Q100 qualification for automotive applications, with top-mark code FZWL and RoHS-compliant SOT23-3 packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.2% at +25°C - ensures accurate ADC/DAC reference without calibration in automotive ECUs. |
| Initial Accuracy | ±0.2% (B-grade) - enables single-point calibration elimination in battery management systems. |
| Tempco | ≤100ppm/°C - limits voltage drift to ±25mV over full −40°C to +125°C range. |
| Shunt Current Range | 60μA to 15mA - supports micropower sensor interfaces and high-current regulation in industrial PLCs. |
| Dynamic Impedance | 0.8Ω max at 1mA - maintains <1mV load regulation error under fast transient currents. |
| Wideband Noise | 35µVRMS (10Hz–10kHz) - preserves SNR in precision analog front-ends for automotive radar receivers. |
| Operating Temp Range | −40°C to +125°C - qualified for engine bay and transmission control module environments. |
Pinout & Package
Package: SOT23-3 (3-pin surface-mount), 2.92mm × 1.3mm footprint, RoHS-compliant, thermal resistance θJA = 336°C/W (four-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode (cathode-side terminal) | Connect to regulated output node; sinks shunt current to maintain 2.500V reference. |
| 2 (−) | Cathode (anode-side terminal) | Reference ground return path; must be tied to system ground for stable operation. |
| 3 (N.C.) | No connection | Must remain unconnected or shorted to pin 2; floating pin causes instability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Validated for automotive Grade 1 (−40°C to +125°C) per /V suffix - enables direct use in ADAS and powertrain modules. |
| No Output Capacitor Required | Stable with any capacitive load - eliminates BOM cost and layout area for decoupling caps in compact PCBs. |
| Low Micropower Operation | 60μA minimum shunt current - extends battery life in portable diagnostic tools and tire pressure sensors. |
| High Current Capability | 15mA max shunt current - supports driving multiple op-amp bias networks or ADC reference inputs simultaneously. |
| Robust Thermal Performance | 150°C max junction temperature - sustains reliability under sustained 125°C ambient + 75mW dissipation conditions. |
Applications
| Automotive Engine Control Unit | Industrial Process Transmitter |
|---|---|
|
Use Scenario: Providing stable 2.500V reference for oxygen sensor signal conditioning and ECU ADC conversion. IC Role / Device Role / Timing Role: Two-terminal shunt reference maintaining precise voltage despite wide supply fluctuations and engine bay temperature swings. Use Value: Enables ±0.2% measurement accuracy over −40°C to +125°C without recalibration, meeting ISO 26262 functional safety requirements. |
Use Scenario: Reference source for 4–20mA loop-powered pressure transmitters in oil & gas refineries. IC Role / Device Role / Timing Role: Micropower shunt reference sinking only 60μA quiescent current while delivering 2.500V to instrumentation amplifiers. Use Value: Reduces total loop power consumption below 3.5mA, preserving headroom for sensor excitation and signal processing. |
| Portable Medical Glucose Meter | Smart Energy Meter ADC Reference |
|
Use Scenario: Precision reference for electrochemical sensor interface in handheld glucose monitors. IC Role / Device Role / Timing Role: Low-noise (35µVRMS) shunt reference ensuring high SNR during low-current biosignal acquisition. Use Value: Maintains <0.5% glucose reading accuracy across battery discharge cycle and body-temperature variations. |
Use Scenario: Reference for polyphase energy metering ICs requiring stable 2.500V input over decades of field operation. IC Role / Device Role / Timing Role: Long-term stable shunt reference with 120ppm voltage drift after 1000h aging test. Use Value: Eliminates annual recalibration by guaranteeing <±0.3% total error over 15-year product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050B25IDBZR | 2.5V ±0.2%, 50ppm/°C tempco, SOT23-3, non-AEC-Q100 | Lacks automotive qualification; lower tempco but narrower −40°C to +125°C guarantee | Select for industrial or consumer apps where AEC-Q100 is not mandated and tighter tempco is critical. |
| ADR3425ARJZ-R7 | 2.5V ±0.1%, 10ppm/°C tempco, SOT23-5, series topology, requires external capacitor | Higher accuracy and lower noise but needs 1µF output cap and higher 100µA min current | Choose when ultra-low drift (<±0.025V over temp) justifies added BOM cost and layout complexity. |
Compared with TL4050B25IDBZR and ADR3425ARJZ-R7, the LM4040BIM3-2.5/V+T uniquely combines AEC-Q100 qualification, zero-output-capacitor operation, and SOT23-3 footprint-making it optimal for automotive and space-constrained industrial designs where reliability and simplicity are prioritized over sub-10ppm tempco.
Availability
LM4040BIM3-2.5/V+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial process transmitters, portable medical diagnostics, and smart energy metering systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4040BIM3-2.5/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 precision analog and mixed-signal semiconductors for demanding industrial, automotive, and communications applications, emphasizing high reliability and low-power performance.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, high-temperature environments where stability, accuracy, and qualification compliance are critical - especially in automotive and industrial sensing systems.
FAQ
What is the maximum shunt current rating for LM4040BIM3-2.5/V+T?
The LM4040BIM3-2.5/V+T supports a continuous shunt current range of 60μA to 15mA. Absolute maximum reverse current is 20mA - exceeding this risks permanent damage. For reliable operation in automotive applications, design with ≤15mA to maintain thermal margin within the SOT23-3 package's 238.1mW derated power limit at +125°C ambient.
Does LM4040BIM3-2.5/V+T require an external output capacitor?
No, the LM4040BIM3-2.5/V+T is inherently stable and does not require an external output capacitor. It remains stable with any capacitive load, including direct connection to ADC reference inputs or op-amp bias nodes. This eliminates BOM cost and PCB area typically needed for series references like the ADR3425ARJZ-R7.
What does the "/V" suffix in LM4040BIM3-2.5/V+T indicate?
The "/V" suffix certifies that the LM4040BIM3-2.5/V+T is AEC-Q100 qualified for automotive Grade 1 operation (−40°C to +125°C). This includes stress testing for temperature cycling, humidity, and mechanical shock - confirming suitability for under-hood and transmission control applications where standard industrial parts may fail prematurely.
How does LM4040BIM3-2.5/V+T achieve its 100ppm/°C temperature coefficient?
The LM4040BIM3-2.5/V+T achieves ≤100ppm/°C tempco through laser-trimmed resistive elements and proprietary bandgap core compensation. Measured over −40°C to +125°C, this limits total voltage drift to ±25mV - verified per AEC-Q100 test conditions and documented in the Electrical Characteristics table for the B-grade 2.500V variant.
Can LM4040BIM3-2.5/V+T be used in forward-bias mode?
Yes, the LM4040BIM3-2.5/V+T functions as a silicon diode in forward bias, supporting up to 10mA anode-to-cathode current. However, its primary design intent and guaranteed specifications apply only in reverse-bias (shunt) mode. Forward conduction is not characterized for precision or temperature behavior and should only be used for protection or clamping, not reference generation.
LM4040BIM3-2.5/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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040BIM3-2.5/V+T FAQ
1.How can I place an order for LM4040BIM3-2.5/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIM3-2.5/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 LM4040BIM3-2.5/V+T reliable?
The price and inventory of LM4040BIM3-2.5/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 LM4040BIM3-2.5/V+T is usually 5 days.
3.What payment methods are accepted for LM4040BIM3-2.5/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIM3-2.5/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIM3-2.5/V+T?
LM4040BIM3-2.5/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIM3-2.5/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 LM4040BIM3-2.5/V+T?
For technical support, including LM4040BIM3-2.5/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIM3-2.5/V+T requirements.
6.How does Aetrix verify that LM4040BIM3-2.5/V+T is sourced from the original manufacturer or authorized distributors?
All LM4040BIM3-2.5/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 LM4040BIM3-2.5/V+T meets industry standards.
7.What is the process for return or replacement of LM4040BIM3-2.5/V+T?
All LM4040BIM3-2.5/V+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIM3-2.5/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 LM4040BIM3-2.5/V+T part is unused and in its original packaging.
Return procedure for LM4040BIM3-2.5/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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