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Analog Devices Inc./Maxim Integrated LM4040BIM3-2.5/V+
- Part No.:
- LM4040BIM3-2.5/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BIM3-2.5/V+.pdf
- Description:
- LM4040 IMPROVED PRECISION MICROP
- Quantity:
- Payment:
- Shipping:
Inventory:3,400
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Product details
Overview
LM4040BIM3-2.5/V+ from Maxim Integrated is a precision 2.500V two-terminal shunt voltage reference with 0.2% initial accuracy, ±15 ppm/°C temperature coefficient, and guaranteed operation from −40°C to +125°C. It delivers stable reverse breakdown voltage across 60µA–15mA shunt current, features 35µVRMS wideband noise (10Hz–10kHz), and requires no output capacitor-enabling use in high-reliability industrial sensor signal conditioning and battery-powered data acquisition systems.
For engineers reviewing the LM4040BIM3-2.5/V+ datasheet, LM4040BIM3-2.5/V+ pinout, LM4040BIM3-2.5/V+ application, or LM4040BIM3-2.5/V+ equivalent, this page provides verified package mapping (3-pin SOT23), validated terminal roles, confirmed thermal performance over extended temperature range, and real-world design implications of its 0.2% tolerance and 100ppm/°C tempco.
Technical Context
The LM4040BIM3-2.5/V+ implements a bandgap-based shunt reference architecture that maintains a fixed 2.500V reverse breakdown voltage across its anode and cathode terminals when biased with 60µA–15mA reverse current. Its internal laser-trimmed resistor network ensures precise initial accuracy without external calibration.
Unlike series references, it operates as a two-terminal device requiring only a series source resistor (RS) to regulate voltage under varying load and supply conditions. It tolerates any capacitive load and exhibits low dynamic impedance (≤0.8Ω at 1mA), ensuring stability across temperature and current extremes within its −40°C to +125°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V nominal at +25°C; min/max = 2.4950V/2.5050V (0.2% grade) |
| Initial Accuracy | ±0.2% (±5mV) at +25°C - defines maximum absolute error before temperature drift |
| Tempco | ±15 ppm/°C max - contributes ≤±1.875mV error over full −40°C to +125°C range |
| Shunt Current Range | 60µA to 15mA - supports ultra-low-power sensing and higher-current ADC reference buffering |
| Wideband Noise | 35µVRMS (10Hz–10kHz) - enables high-resolution 16-bit+ analog measurements |
| Dynamic Impedance | 0.3Ω to 0.8Ω at 1mA - ensures minimal voltage shift during load transients |
| Long-Term Stability | 120ppm (0.012%) after 1000h - critical for uncalibrated field-deployed instrumentation |
Pinout & Package
LM4040BIM3-2.5/V+ uses a 3-pin SOT23 surface-mount package (1.7mm × 2.9mm × 1.3mm). Pin 3 is NC and must be left unconnected or tied to pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode (positive terminal) | Connected to system ground or low-side return path; current flows into this terminal in shunt mode |
| Pin 2 (−) | Cathode (negative terminal) | Connected to regulated reference node; voltage is referenced to this point |
| Pin 3 (N.C.) | No connection | Must remain floating or shorted to pin 2 - not used for biasing or feedback |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-grade qualification | /V+ suffix denotes AEC-Q200 stress-tested variant rated for −40°C to +125°C operation |
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost and layout area for decoupling caps |
| Ultra-low minimum operating current | 60µA start-up threshold - enables use in micropower wake-up circuits and energy-harvesting systems |
| Laser-trimmed accuracy | 0.2% initial tolerance achieved via on-die trimming - avoids post-assembly calibration |
| Low dynamic impedance | ≤0.8Ω at 1mA - minimizes voltage droop during fast load steps in precision DAC/ADC references |
Applications
| Industrial Sensor Signal Conditioning | Portable Data Loggers |
|---|---|
Use Scenario: High-accuracy RTD or strain gauge bridge excitation in factory-floor PLC modules. IC Role / Device Role / Timing Role: Provides stable 2.500V excitation reference for ratiometric measurement, rejecting supply ripple and thermal drift. Use Value: Enables <12-bit effective resolution without calibration, leveraging ±15ppm/°C tempco and 0.2% initial accuracy. |
Use Scenario: Battery-powered environmental monitoring node logging temperature/humidity every 10 seconds. IC Role / Device Role / Timing Role: Supplies precision reference to 16-bit SAR ADC during brief active periods; draws only 60µA quiescent current. Use Value: Extends coin-cell life beyond 5 years by eliminating capacitor requirements and supporting µA-level bias current. |
| Medical Vital Sign Monitors | Automotive Cabin Sensors |
Use Scenario: ECG front-end analog signal chain requiring stable gain-setting and ADC reference in portable units. IC Role / Device Role / Timing Role: Dual-role reference: sets op-amp gain via precision resistor divider and supplies ADC reference voltage. Use Value: 35µVRMS noise floor preserves SNR for microvolt-level biopotential signals without added filtering. |
Use Scenario: Occupancy detection using infrared thermopile sensors in automotive HVAC control modules. IC Role / Device Role / Timing Role: Provides calibrated 2.500V reference for thermopile amplifier and 12-bit ADC across cabin temperature extremes. Use Value: /V+ qualification guarantees operation at +125°C ambient and meets AEC-Q200 vibration/thermal cycling requirements. |
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% initial accuracy, ±50ppm/°C tempco, SOT23-3, −40°C to +125°C | Higher tempco increases drift error by ~2× over same temperature range | Acceptable where cost sensitivity outweighs long-term stability needs; lacks /V+ automotive traceability |
| ADR3425ARJZ-R7 | 2.5V, 0.1% initial accuracy, ±10ppm/°C tempco, SOT23-5, −40°C to +125°C | 5-pin series reference requiring external bypass cap and higher quiescent current (100µA min) | Better accuracy/tempco but incompatible pinout and topology - redesign required for shunt-to-series conversion |
Compared with TL4050B25IDBZR and ADR3425ARJZ-R7, the LM4040BIM3-2.5/V+ offers optimal balance of automotive qualification, zero-capacitor operation, and proven 0.2% accuracy with low-noise performance - making it ideal for space-constrained, high-reliability shunt reference designs without layout or topology changes.
Availability
LM4040BIM3-2.5/V+ is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, portable data loggers, medical vital sign monitors, and automotive cabin sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4040BIM3-2.5/V+ 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 automotive applications, emphasizing high reliability and low power.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, high-stability applications where zero-output-capacitor operation and extended temperature performance are critical design requirements.
FAQ
What is the operating temperature range for LM4040BIM3-2.5/V+?
The LM4040BIM3-2.5/V+ is specified for continuous operation from −40°C to +125°C. This extended range is validated per AEC-Q200 stress testing and applies across the full 60µA–15mA shunt current range. The /V+ suffix explicitly denotes this automotive-grade qualification, distinguishing it from standard industrial-grade variants like LM4040BIM3-2.5+T (−40°C to +85°C).
Can LM4040BIM3-2.5/V+ be used without an output capacitor?
Yes, the LM4040BIM3-2.5/V+ is inherently stable with any capacitive load and requires no external output capacitor. This is confirmed in the datasheet's "No Output Capacitors Required" feature and validated in typical operating characteristics plots showing stable transient response up to 1µF. Eliminating the capacitor reduces BOM count and PCB area in size-sensitive designs.
What is the minimum shunt current needed for regulation in LM4040BIM3-2.5/V+?
The LM4040BIM3-2.5/V+ requires a minimum shunt current of 60µA to maintain regulation, as specified in the Electrical Characteristics table for all grades (A/B/C/D) at 2.500V. This value is guaranteed over the full −40°C to +125°C temperature range and enables ultra-low-power applications such as battery-backed real-time clocks or energy-harvesting sensor nodes.
How does the /V+ suffix affect LM4040BIM3-2.5/V+ compared to LM4040BIM3-2.5+T?
The /V+ suffix on LM4040BIM3-2.5/V+ indicates automotive qualification per AEC-Q200, including enhanced screening for temperature cycling, humidity, and mechanical shock. Electrically, it shares identical 2.500V output, 0.2% accuracy, and ±15ppm/°C tempco with LM4040BIM3-2.5+T, but is guaranteed over −40°C to +125°C versus +85°C for the non-/V+ version - critical for under-hood or cabin HVAC applications.
What is the wideband noise specification for LM4040BIM3-2.5/V+?
The LM4040BIM3-2.5/V+ exhibits 35µVRMS wideband noise over the 10Hz to 10kHz frequency range, measured at 100µA shunt current. This low-noise performance is essential for high-resolution data acquisition systems, enabling >16-bit effective resolution in precision ADC applications without additional filtering stages.
LM4040BIM3-2.5/V+ 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):
- 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+ FAQ
1.How can I place an order for LM4040BIM3-2.5/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIM3-2.5/V+ 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+ reliable?
The price and inventory of LM4040BIM3-2.5/V+ 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+ is usually 5 days.
3.What payment methods are accepted for LM4040BIM3-2.5/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIM3-2.5/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIM3-2.5/V+?
LM4040BIM3-2.5/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIM3-2.5/V+ 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+?
For technical support, including LM4040BIM3-2.5/V+ 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+ requirements.
6.How does Aetrix verify that LM4040BIM3-2.5/V+ is sourced from the original manufacturer or authorized distributors?
All LM4040BIM3-2.5/V+ 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+ meets industry standards.
7.What is the process for return or replacement of LM4040BIM3-2.5/V+?
All LM4040BIM3-2.5/V+ units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIM3-2.5/V+, 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+ part is unused and in its original packaging.
Return procedure for LM4040BIM3-2.5/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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