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Texas Instruments LM4040BIM3-2.0
- Part No.:
- LM4040BIM3-2.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BIM3-2.0.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,290
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Product details
Overview
LM4040BIM3-2.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 2.048 V reverse breakdown voltage with ±4.1 mV (±0.2%) initial tolerance at 25°C, 60 μA to 15 mA operating current range, and 100 ppm/°C max temperature coefficient-used for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040BIM3-2.0 datasheet, LM4040BIM3-2.0 pinout, LM4040BIM3-2.0 application, or LM4040BIM3-2.0 equivalent, this page delivers verified electrical specs, thermal behavior, industrial-grade (-40°C to +85°C) performance, and real-world substitution guidance without generic claims or unsupported functionality.
Technical Context
The LM4040BIM3-2.0 operates as a two-terminal shunt reference: cathode accepts input current while anode connects to ground, regulating output voltage across its terminals via Zener-zap trimmed bandgap architecture. It requires no external capacitor and remains stable with capacitive loads up to 10 nF.
Its design integrates curvature-corrected bandgap reference and low-dynamic-impedance Zener structure, enabling <35 μVRMS noise (10 Hz–10 kHz), 0.8 mV load regulation (60 μA–1 mA), and thermal hysteresis of only 0.08% over -40°C to +125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage-enables precise 12-bit ADC full-scale calibration at 2.048 V reference point. |
| Initial Tolerance | ±4.1 mV (±0.2%) at 25°C-guarantees ≤±21 mV total error over -40°C to +85°C industrial range. |
| Operating Current | 60 μA to 15 mA-supports ultra-low-power sensor nodes and high-current DAC reference buffering. |
| Temp Coefficient | ≤100 ppm/°C-limits drift to ±6.5 mV across 65°C ambient swing, critical for field-deployed measurement systems. |
| Dynamic Impedance | 0.8 Ω typical at 1 mA-ensures minimal output voltage shift under dynamic load transients in data acquisition circuits. |
| Wideband Noise | 35 μVRMS (10 Hz–10 kHz)-preserves signal integrity in high-resolution analog front-ends. |
| Long-Term Stability | 120 ppm after 1000 hours-reduces recalibration frequency in sealed industrial monitoring equipment. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, 1.45 mm height, surface-mount compatible with standard reflow profiles (peak 260°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage output node | Connects to supply rail; sinks all reference current and load current-voltage develops between this pin and Anode. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; defines 0 V reference point for output voltage measurement. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must be left floating or tied to Anode (Pin 2) per TI specification-no routing required. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables single-component reference implementation in space-constrained PCB layouts like handheld test gear. |
| Stable with capacitive loads | Supports direct connection to ADC input caps (≤10 nF) without oscillation-eliminates need for series isolation resistors. |
| Low quiescent current | 60 μA minimum operating current enables >10-year battery life in coin-cell-powered IoT sensors. |
| Industrial temperature range | -40°C to +85°C operation validated-suitable for deployment in factory-floor PLC I/O modules and outdoor environmental monitors. |
| AEC-Q100 qualified variants available | SOT-23 version supports automotive Grade 3 qualification-enables use in non-safety-critical vehicle subsystems (e.g., infotainment power rails). |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter using 16-bit SAR ADC with internal reference buffer. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V reference for ADC conversion accuracy. Use Value: ±0.2% initial tolerance and 100 ppm/°C TC ensure ≤0.1% full-scale error across operating temperature, meeting Class II meter specifications. |
Use Scenario: Modular DAQ card with multiple 24-bit sigma-delta ADC channels. IC Role / Device Role / Timing Role: Shared precision reference source for multi-channel simultaneous sampling. Use Value: Low 0.8 Ω dynamic impedance prevents crosstalk-induced reference droop during channel switching transients. |
| Process Control Sensors | Energy Management Units |
Use Scenario: 4–20 mA loop-powered pressure transmitter with onboard microcontroller. IC Role / Device Role / Timing Role: Excitation reference for bridge sensor Wheatstone network and ADC bias. Use Value: 60 μA min current allows operation down to 3.3 V supply while maintaining 2.048 V accuracy-critical for low-voltage loop compliance. |
Use Scenario: Smart electricity meter with metrology ASIC requiring calibrated voltage scaling. IC Role / Device Role / Timing Role: Primary reference for RMS voltage and current measurement subsystems. Use Value: 35 μVRMS noise floor ensures <0.05% measurement uncertainty in Class 0.5 metering applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050B20IDBZR | 2.048 V, ±0.2%, SOT-23-3, but uses buried Zener topology-lower long-term drift (50 ppm vs. 120 ppm) and higher 20 mA max current. | Better suited for metrology-grade equipment requiring <10-year calibration stability; less optimal for ultra-low-IQ designs due to 75 μA min current. | Select TL4050B20IDBZR when long-term drift dominates over quiescent current in lifetime cost modeling. |
| MAX6002BESA+ | 2.048 V, ±0.2%, SO-8 package, higher 1.2 Ω dynamic impedance and 65 μVRMS noise-requires external decoupling cap for stability. | Preferred where board area permits SO-8 and legacy footprint compatibility is required; not suitable for space-constrained SOT-23 layouts. | Choose MAX6002BESA+ only when redesigning existing SO-8-based systems and thermal derating margin exceeds 200 mW. |
Compared with TL4050B20IDBZR and MAX6002BESA+, the LM4040BIM3-2.0 offers the smallest footprint, lowest noise, and lowest minimum operating current-making it optimal for new compact, battery-sensitive designs where SOT-23 placement is fixed.
Availability
LM4040BIM3-2.0 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and process control sensors requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4040BIM3-2.0 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with over 50 years of precision reference design heritage.
The LM4040-N product line was engineered for space-constrained, micropower applications demanding high initial accuracy and low temperature drift-targeting portable test equipment, industrial sensors, and automotive subsystems.
FAQ
What is the maximum operating current for LM4040BIM3-2.0?
The LM4040BIM3-2.0 supports a maximum operating current of 15 mA. This limit is defined by absolute maximum ratings and thermal constraints of the SOT-23-3 package, where power dissipation must stay below 306 mW at 25°C ambient. Exceeding 15 mA risks junction temperature exceeding 125°C, potentially degrading long-term stability or causing permanent damage. The LM4040BIM3-2.0 maintains specified accuracy across its full 60 μA–15 mA range.
Does LM4040BIM3-2.0 require an external capacitor for stability?
No, the LM4040BIM3-2.0 does not require an external capacitor for stability. Its internal architecture eliminates the need for output capacitance, and it remains stable even with capacitive loads up to 10 nF-enabling direct connection to ADC input capacitors or filtering networks without risk of oscillation. This feature simplifies layout and reduces BOM count in designs using the LM4040BIM3-2.0 as a reference source.
What is the temperature coefficient specification for LM4040BIM3-2.0?
The LM4040BIM3-2.0 has a maximum average temperature coefficient of 100 ppm/°C over the industrial temperature range (-40°C to +85°C). This value is measured at IR = 100 μA and defines the worst-case voltage drift per degree Celsius relative to the 25°C reference point. At ±65°C deviation, this yields ≤±6.5 mV total drift-well within the ±21 mV total tolerance budget for Grade B devices across temperature.
Can LM4040BIM3-2.0 be used in automotive applications?
The LM4040BIM3-2.0 itself is not AEC-Q100 qualified; however, the pin-compatible LM4040BQAIM3-2.0 (Grade A, Q1 variant) is certified for automotive Grade 3 (-40°C to +125°C). For non-safety-critical automotive subsystems such as infotainment power supervision or cabin sensor biasing, the Q1 variant is recommended. The LM4040BIM3-2.0 may be used in prototype or non-automotive-qualified designs, but TI does not guarantee its performance under automotive stress testing protocols.
What is the meaning of 'B' grade in LM4040BIM3-2.0?
The 'B' in LM4040BIM3-2.0 denotes the initial reverse breakdown voltage tolerance grade: ±0.2% (±4.1 mV) at 25°C. This is distinct from 'A' grade (±0.1%), 'C' grade (±0.5%), and others. The 'B' grade balances cost and precision for applications where tighter tolerances are unnecessary-such as general-purpose sensor excitation or mid-tier data loggers-while still ensuring robust performance across temperature and load variations in the LM4040BIM3-2.0.
LM4040BIM3-2.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 35µVrms
- 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
LM4040BIM3-2.0 FAQ
1.How can I place an order for LM4040BIM3-2.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIM3-2.0 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 LM4040BIM3-2.0 reliable?
The price and inventory of LM4040BIM3-2.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BIM3-2.0 is usually 5 days.
3.What payment methods are accepted for LM4040BIM3-2.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIM3-2.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIM3-2.0?
LM4040BIM3-2.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIM3-2.0 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 LM4040BIM3-2.0?
For technical support, including LM4040BIM3-2.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIM3-2.0 requirements.
6.How does Aetrix verify that LM4040BIM3-2.0 is sourced from the original manufacturer or authorized distributors?
All LM4040BIM3-2.0 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 LM4040BIM3-2.0 meets industry standards.
7.What is the process for return or replacement of LM4040BIM3-2.0?
All LM4040BIM3-2.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIM3-2.0, 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 LM4040BIM3-2.0 part is unused and in its original packaging.
Return procedure for LM4040BIM3-2.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040BIM3-2.0 Tags
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