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Analog Devices Inc./Maxim Integrated LM4040BIM3-2.1+T
- Part No.:
- LM4040BIM3-2.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BIM3-2.1+T.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,395
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Product details
Overview
LM4040BIM3-2.1+T from Maxim Integrated is a precision 2.048V two-terminal shunt voltage reference in SC70-3 package, featuring 0.2% initial accuracy, ±100ppm/°C temperature coefficient, and 60μA–15mA operating current range. It delivers stable reverse-breakdown voltage for analog-to-digital converter (ADC) reference, portable battery-powered instrumentation, and industrial sensor signal conditioning circuits.
For engineers reviewing the LM4040BIM3-2.1+T datasheet, LM4040BIM3-2.1+T pinout, LM4040BIM3-2.1+T application, or LM4040BIM3-2.1+T equivalent, key selection criteria include guaranteed -40°C to +85°C operation, no external capacitor requirement, low 28μVRMS noise (10Hz–10kHz), and compatibility with capacitive loads in space-constrained designs.
Technical Context
The LM4040BIM3-2.1+T uses bandgap-based shunt architecture to maintain a precise 2.048V reverse breakdown voltage across its terminals when biased with 60μA to 15mA cathode-to-anode current. Its laser-trimmed resistors ensure factory-calibrated accuracy without post-installation trimming.
It operates as a two-terminal device with no ground reference required, enabling simple integration into high-side sensing, current-source biasing, and voltage-monitoring circuits. Thermal performance is specified over -40°C to +85°C with 120ppm long-term stability after 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V nominal; ±4.0mV (±0.2%) tolerance at +25°C ensures accurate ADC full-scale calibration. |
| Tempco | ±100ppm/°C max; guarantees ≤±8.2mV drift over -40°C to +85°C for stable reference in varying ambient conditions. |
| Operating Current | 60μA to 15mA; supports ultra-low-power sensor nodes and high-current precision regulators without external components. |
| Dynamic Impedance | 0.3Ω to 0.8Ω at 1mA; maintains <1mV output variation under load transients in feedback loops. |
| Output Noise | 28μVRMS (10Hz–10kHz); enables high-resolution 16-bit+ data acquisition without added filtering. |
| Long-Term Stability | 120ppm after 1000h; ensures minimal reference drift in field-deployed industrial control systems. |
Pinout & Package
LM4040BIM3-2.1+T is housed in a RoHS-compliant 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23 equivalents. Pin 3 is unconnected (N.C.) and must be left floating or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-bias terminal; connects to regulated voltage node requiring precise 2.048V reference. |
| 2 (–) | Anode | Reference ground return; forms shunt path with external current-limiting resistor. |
| 3 (N.C.) | No Connection | Must remain unconnected or shorted to pin 2; no internal function-ensures mechanical compatibility only. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint saves >50% board area vs. SOT23, critical for wearables and compact IoT sensors. |
| No output capacitor required | Stable under any capacitive load up to 10µF, eliminating BOM cost and layout constraints in battery-backed systems. |
| Wide shunt current range | 60μA minimum start-up current enables operation in micropower sleep modes; 15mA max supports active regulation in industrial PLCs. |
| Low wideband noise | 28μVRMS (10Hz–10kHz) directly improves effective number of bits (ENOB) in precision ADC applications. |
| Laser-trimmed accuracy | 0.2% initial tolerance eliminates need for system-level calibration in production test, reducing manufacturing time. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) front-end with 16-bit SAR ADC sampling analog electrochemical signals. IC Role / Device Role / Timing Role: Provides stable 2.048V reference for ADC full-scale range, ensuring sub-1mV measurement resolution. Use Value: 0.2% accuracy and 28μVRMS noise enable ±0.5% glucose concentration accuracy over full temperature range. | Use Scenario: Environmental monitoring node logging temperature/humidity every 10 seconds using coin-cell battery. IC Role / Device Role / Timing Role: Supplies reference voltage to low-power ADC during brief active periods; remains idle otherwise. Use Value: 60μA minimum operating current extends battery life beyond 2 years while maintaining 2.048V precision. |
| Industrial Process Transmitters | Automotive Cabin Sensors |
Use Scenario: 4–20mA loop-powered pressure transmitter operating in -40°C to +85°C ambient. IC Role / Device Role / Timing Role: Sets reference for DAC-driven current output stage; must survive extended thermal cycling. Use Value: ±100ppm/°C tempco and 120ppm long-term stability ensure <0.1% full-scale error over 10-year field deployment. | Use Scenario: Occupancy detection module using infrared thermopile sensor in automotive cabin HVAC system. IC Role / Device Role / Timing Role: Reference for thermopile amplifier and ADC; exposed to rapid temperature gradients during vehicle startup. Use Value: Guaranteed -40°C to +85°C operation and capacitive-load tolerance prevent reference collapse during cold cranking events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV431ACDBVR | 2.5V fixed output; 1% initial accuracy; higher 300ppm/°C tempco; requires 80μA min current. | Suitable for non-critical biasing where 2.5V matches system rail; not recommended for high-resolution ADC references. | Select TLV431ACDBVR only if 2.5V output and relaxed accuracy suffice and board space allows larger SOT23-5 footprint. |
| MAX6002EUR+T | 2.048V output; 0.1% accuracy; ±50ppm/°C tempco; SC70-3 package; 100μA min current. | Higher precision and lower drift ideal for metrology-grade instruments; tighter current requirement limits ultra-low-power use. | Choose MAX6002EUR+T when 0.1% accuracy and ±50ppm/°C are mandatory, accepting 40μA higher minimum current. |
Compared with LM4040BIM3-2.1+T, TLV431ACDBVR trades accuracy and stability for broader voltage options and lower cost, while MAX6002EUR+T improves precision and thermal drift at the expense of higher minimum operating current-making LM4040BIM3-2.1+T the optimal balance for cost-sensitive, space-constrained industrial and portable applications demanding 0.2% accuracy.
Availability
LM4040BIM3-2.1+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, industrial process transmitters, and automotive cabin sensors requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4040BIM3-2.1+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, automotive, and communications markets, emphasizing reliability, miniaturization, and low-power operation.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-stability applications where traditional three-terminal references add complexity and board area.
FAQ
What is the exact output voltage tolerance of LM4040BIM3-2.1+T at room temperature?
The LM4040BIM3-2.1+T has a nominal output voltage of 2.048V with ±4.0mV (±0.2%) tolerance at +25°C, as confirmed in the Electrical Characteristics table for the B-grade variant. This corresponds to a guaranteed range of 2.044V to 2.052V under standard test conditions, enabling precise calibration of 12-bit to 16-bit analog-to-digital converters without post-fabrication trimming.
Does LM4040BIM3-2.1+T require an external capacitor for stability?
No, the LM4040BIM3-2.1+T does not require an external output capacitor and remains stable with any capacitive load-including bypass caps up to 10µF-due to its inherent shunt architecture and low dynamic impedance. This eliminates design risk and BOM cost in portable and automotive applications where layout space and component count are constrained.
What is the minimum operating current needed for LM4040BIM3-2.1+T to regulate properly?
The LM4040BIM3-2.1+T requires a minimum shunt current of 60μA to maintain regulation across its full temperature range (-40°C to +85°C). Below this threshold, output voltage may deviate beyond specification; the datasheet confirms IRMIN = 65μA typical and 60μA maximum at TMIN, making it suitable for ultra-low-power wake-up circuits and energy-harvesting systems.
Can LM4040BIM3-2.1+T be used in automotive under-hood applications?
The LM4040BIM3-2.1+T is rated for -40°C to +85°C operation and is not AEC-Q100 qualified; therefore, it is not recommended for under-hood automotive applications. For such environments, select the /V suffix variants (e.g., LM4040BEM3-2.1/V+T), which are explicitly AEC-Q100 qualified and rated to +125°C junction temperature.
How does the temperature coefficient of LM4040BIM3-2.1+T affect system accuracy over its operating range?
The LM4040BIM3-2.1+T has a maximum temperature coefficient of ±100ppm/°C. Over its -40°C to +85°C range (ΔT = 125°C), this contributes up to ±12.5mV (±0.61%) additional error beyond initial tolerance. Combined with ±4.0mV initial error, total worst-case deviation is ±16.5mV-well within requirements for 12-bit systems but requiring compensation in 16-bit precision applications.
LM4040BIM3-2.1+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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 28µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040BIM3-2.1+T FAQ
1.How can I place an order for LM4040BIM3-2.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIM3-2.1+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 LM4040BIM3-2.1+T reliable?
The price and inventory of LM4040BIM3-2.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BIM3-2.1+T is usually 5 days.
3.What payment methods are accepted for LM4040BIM3-2.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIM3-2.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIM3-2.1+T?
LM4040BIM3-2.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIM3-2.1+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 LM4040BIM3-2.1+T?
For technical support, including LM4040BIM3-2.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIM3-2.1+T requirements.
6.How does Aetrix verify that LM4040BIM3-2.1+T is sourced from the original manufacturer or authorized distributors?
All LM4040BIM3-2.1+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 LM4040BIM3-2.1+T meets industry standards.
7.What is the process for return or replacement of LM4040BIM3-2.1+T?
All LM4040BIM3-2.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIM3-2.1+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 LM4040BIM3-2.1+T part is unused and in its original packaging.
Return procedure for LM4040BIM3-2.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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