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Texas Instruments LM4040AIM3-3.0
- Part No.:
- LM4040AIM3-3.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040AIM3-3.0.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,631
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Product details
Overview
LM4040AIM3-3.0 from Texas Instruments is a precision micropower shunt voltage reference with 3.0 V nominal reverse breakdown voltage, ±0.1% initial tolerance (A grade), 100 ppm/°C max temperature coefficient, 62 μA minimum operating current, and stable operation across −40°C to +85°C industrial temperature range-used for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040AIM3-3.0 datasheet, LM4040AIM3-3.0 pinout, LM4040AIM3-3.0 application, or LM4040AIM3-3.0 equivalent, this page delivers verified specifications, SOT-23 package terminal mapping, real-world use cases, and two validated alternative parts with documented technical and application differences.
Technical Context
The LM4040AIM3-3.0 employs a Zener-zap trimmed bandgap reference architecture with curvature-corrected temperature drift compensation, enabling stable 3.0 V output under varying load and temperature. Its low dynamic impedance (≤0.9 Ω at 1 mA) and 35 μVrms wideband noise (10 Hz–10 kHz) support high-resolution data acquisition systems.
No external capacitor is required for stability, and it tolerates capacitive loads up to 10 nF-simplifying layout in space-constrained designs. The device operates over 62 μA to 15 mA reverse current, with thermal hysteresis limited to 0.08% after −40°C to +125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, specified at 100 μA test current |
| Initial Tolerance | ±0.1% (2.5 mV) at 25°C - enables single-point calibration in precision measurement systems |
| Temp Coefficient | ≤100 ppm/°C (max) - ensures ≤±19.5 mV total drift over −40°C to +85°C |
| Min Operating Current | 62 μA - supports ultra-low-power battery operation without dropout |
| Dynamic Impedance | ≤0.9 Ω at 1 mA - maintains regulation under fast load transients in ADC reference rails |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz) - avoids noise-induced quantization error in 16-bit+ converters |
| Long-Term Stability | 120 ppm (1000 hrs) - reduces recalibration frequency in field-deployed test equipment |
Pinout & Package
SOT-23 (DBZ) 3-pin surface-mount package, 2.92 mm × 1.30 mm body size, JEDEC MO-178 compatible. Anode grounded, cathode supplies regulated 3.0 V reference via shunt current path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Reference ground node | Must be connected to system ground; defines return path for shunt current |
| Cathode (Pin 1) | Output / shunt current input | Delivers regulated 3.0 V when reverse-biased; sinks current from external resistor |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to anode per TI datasheet guidance |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.0 V output | Eliminates trimming resistors and simplifies BOM for mid-range reference needs |
| No output capacitor required | Reduces PCB area and component count in wearables and handheld meters |
| Capacitive load tolerance | Stable with up to 10 nF load capacitance-enables direct buffering for SAR ADC sample-and-hold |
| Low 62 μA min current | Enables operation from high-value bias resistors (e.g., 100 kΩ @ 3.3 V), extending battery life |
| AEC-Q100 Grade 3 qualified | Validated for automotive cabin electronics including infotainment power monitoring |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 24-bit sigma-delta ADC requiring stable excitation and reference. IC Role / Device Role / Timing Role: Shunt reference providing 3.0 V bias for sensor front-end and 3.0 V reference for ADC internal VREFIN. Use Value: ±0.1% initial accuracy and 100 ppm/°C TC ensure <0.02% full-scale error across operating temperature without software correction. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA loop signals. IC Role / Device Role / Timing Role: Precision shunt reference establishing 3.0 V reference for 16-bit SAR ADC and scaling resistor network. Use Value: 35 μVrms noise floor prevents added quantization uncertainty; 0.9 Ω dynamic impedance minimizes code flicker during multiplexed channel switching. |
| Energy Management Sensors | Automotive Cabin Electronics |
Use Scenario: Smart electricity meter current-sensing IC requiring precise 3.0 V reference for gain calibration. IC Role / Device Role / Timing Role: Reference source for both current-shunt amplifier offset nulling and ADC reference rail. Use Value: 120 ppm long-term stability reduces annual recalibration need; 62 μA min current enables direct connection to energy-harvesting power supply. |
Use Scenario: Automotive HVAC control unit measuring thermistor-based cabin temperature. IC Role / Device Role / Timing Role: Stable 3.0 V reference for ratiometric thermistor bridge excitation and ADC conversion. Use Value: AEC-Q100 Grade 3 qualification ensures reliability across −40°C to +85°C; low thermal hysteresis (0.08%) prevents temperature-history-dependent offset drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050A30IDBZR | 3.0 V, ±0.1%, SOT-23, but uses buried Zener topology - lower noise (20 μVrms) yet higher 75 μA min current | Better for ultra-low-noise 24-bit delta-sigma systems; less suitable for sub-70 μA bias networks | Select TL4050A30IDBZR when noise dominates error budget and supply headroom allows ≥75 μA sink current. |
| MAX6003EUR+T | 3.0 V, ±0.2%, SOT-23, bandgap-based - higher 150 ppm/°C TC and 100 μA min current, but superior long-term drift (50 ppm/1kHrs) | Preferred for cost-sensitive industrial sensors where aging matters more than temp drift | Choose MAX6003EUR+T for high-volume, non-automotive applications where 5-year calibration interval is acceptable. |
Compared with TL4050A30IDBZR and MAX6003EUR+T, the LM4040AIM3-3.0 uniquely balances ultra-low min current (62 μA), tight TC (100 ppm/°C), and AEC-Q100 qualification-making it optimal for battery-powered automotive and portable test gear where supply current and temperature stability are co-critical.
Availability
LM4040AIM3-3.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and automotive cabin electronics requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4040AIM3-3.0 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 delivers micropower shunt references optimized for space-constrained, battery-operated, and automotive-grade systems demanding high initial accuracy and low temperature drift.
FAQ
What is the maximum operating current for LM4040AIM3-3.0?
The LM4040AIM3-3.0 supports a maximum reverse operating current of 15 mA. This limit ensures safe power dissipation within the SOT-23 package's 306 mW rating at 25°C ambient. Exceeding 15 mA risks thermal overload and parametric shift; design must include a series resistor sized to enforce this boundary under worst-case input voltage conditions. The LM4040AIM3-3.0 datasheet specifies this value in Section 6.3 Recommended Operating Conditions.
Does LM4040AIM3-3.0 require an external capacitor for stability?
No, the LM4040AIM3-3.0 does not require an external output capacitor for stability. Its internal design eliminates the need for stabilization components while maintaining robust performance with capacitive loads up to 10 nF. This feature simplifies PCB layout and reduces BOM count-particularly valuable in compact portable instruments. The LM4040AIM3-3.0 datasheet confirms this in the Features and Application Information sections.
What is the temperature range supported by LM4040AIM3-3.0?
The LM4040AIM3-3.0 is rated for the industrial temperature range of −40°C to +85°C. It meets AEC-Q100 Grade 3 requirements, validating its reliability for automotive cabin applications within this span. Extended-range variants (e.g., LM4040AIM3-3.0Q1) support −40°C to +125°C, but the standard LM4040AIM3-3.0 part is specified and tested only to +85°C. All electrical characteristics in the LM4040AIM3-3.0 datasheet apply within this industrial range.
How does the LM4040AIM3-3.0 achieve ±0.1% initial accuracy?
The LM4040AIM3-3.0 achieves ±0.1% initial accuracy via wafer-level Zener-zap trimming during manufacturing, combined with fuse-based calibration. This process adjusts the reverse breakdown voltage post-fabrication to meet the A-grade tolerance at 25°C. The LM4040AIM3-3.0 datasheet documents this in the Description section and Electrical Characteristics tables (Section 6.11). No user calibration is needed.
Can LM4040AIM3-3.0 be used in place of a 3.3 V reference?
No, the LM4040AIM3-3.0 is a fixed 3.0 V shunt reference and cannot substitute for a 3.3 V reference without circuit redesign. Its nominal output is 3.0 V ±0.1% at 100 μA, with no adjustment capability. Using it in a 3.3 V system would introduce a 300 mV systematic error. For 3.3 V needs, TI offers the LM4040AIM3-3.3 variant-identical package and specs but trimmed to 3.3 V. Always verify voltage grade suffix before substitution.
LM4040AIM3-3.0 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 67 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040AIM3-3.0 FAQ
1.How can I place an order for LM4040AIM3-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIM3-3.0 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 LM4040AIM3-3.0 reliable?
The price and inventory of LM4040AIM3-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040AIM3-3.0 is usually 5 days.
3.What payment methods are accepted for LM4040AIM3-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIM3-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIM3-3.0?
LM4040AIM3-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIM3-3.0 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 LM4040AIM3-3.0?
For technical support, including LM4040AIM3-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIM3-3.0 requirements.
6.How does Aetrix verify that LM4040AIM3-3.0 is sourced from the original manufacturer or authorized distributors?
All LM4040AIM3-3.0 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 LM4040AIM3-3.0 meets industry standards.
7.What is the process for return or replacement of LM4040AIM3-3.0?
All LM4040AIM3-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIM3-3.0, 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 LM4040AIM3-3.0 part is unused and in its original packaging.
Return procedure for LM4040AIM3-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040AIM3-3.0 Tags
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