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Texas Instruments LM4041QEIM3-1.2/NO
- Part No.:
- LM4041QEIM3-1.2/NO
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041QEIM3-1.2/NO.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,980
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Product details
Overview
LM4041QEIM3-1.2/NO from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 1.225 V reverse breakdown voltage with ±25 mV (±2.0%) initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and stable operation from 60 μA to 12 mA load current. It serves as a compact, capacitor-free reference for ADC biasing, sensor excitation, and battery-monitoring circuits in automotive-grade industrial systems.
For engineers reviewing the LM4041QEIM3-1.2/NO datasheet, LM4041QEIM3-1.2/NO pinout, LM4041QEIM3-1.2/NO application, or LM4041QEIM3-1.2/NO equivalent, key selection criteria include its AEC-Q100 Grade 3 qualification (–40°C to +85°C), no-output-capacitor requirement, low 20 μVrms noise (10 Hz–10 kHz), and compatibility with capacitive loads in space-constrained designs.
Technical Context
The LM4041QEIM3-1.2/NO implements a bandgap-based shunt architecture with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming to achieve ±2.0% initial accuracy. Its two-terminal configuration eliminates external feedback components, simplifying layout while maintaining stability across wide current and temperature ranges.
It operates exclusively in reverse-bias mode: cathode supplies regulated voltage output, anode connects to system ground, and no third terminal is used-distinguishing it from series references and confirming its role as a passive, self-biased voltage sink rather than an active regulator or buffer.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V reverse breakdown; enables direct replacement of 1.2 V references without resistor networks |
| Initial Tolerance | ±25 mV (±2.0%) at 25°C; corresponds to E-grade specification per TI SNOS641G datasheet |
| Temp Coefficient | Max ±100 ppm/°C over –40°C to +85°C; ensures ≤±8.5 mV total drift across full industrial range |
| Operating Current | 60 μA min to 12 mA max; supports ultra-low-power sensor nodes and high-current DAC references |
| Output Noise | 20 μVrms (10 Hz–10 kHz); suitable for 16-bit+ data acquisition without added filtering |
| Dynamic Impedance | 0.5–1.5 Ω at 1 mA; maintains regulation under fast transient load steps |
| Long-Term Stability | 120 ppm after 1000 hrs; predictable aging behavior for mission-critical calibration circuits |
Pinout & Package
LM4041QEIM3-1.2/NO uses the 3-pin SOT-23 (DBZ) package (1.30 mm × 2.92 mm), with anode grounded, cathode delivering regulated voltage, and no third functional pin-consistent with its two-terminal shunt topology.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Ground reference node | Must be connected directly to system ground; floating anode disables regulation |
| Cathode (Pin 1) | Shunt output terminal | Provides 1.225 V reference; sinks all load + bias current; connects to top of divider or ADC REF+ |
| NC (Pin 3) | No-connect | Internally unconnected; must remain floating or tied to anode per datasheet guidance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 3 qualified | Validated for automotive applications from –40°C to +85°C ambient, supporting infotainment and body control modules |
| No output capacitor required | Eliminates BOM cost and board area for stability; works with any capacitive load including ADC input capacitance |
| Tolerates capacitive loads | Stable into ≥1 μF; avoids oscillation when driving SAR ADC sample capacitors or op-amp inputs |
| Low 20 μVrms noise | Enables high-resolution measurements without post-regulation filtering in portable instrumentation |
| Micropower operation (60 μA min) | Extends battery life in wireless sensors and energy-harvesting nodes where supply current is constrained |
Applications
| Portable Battery Monitoring | Data Acquisition Front-End |
|---|---|
Use Scenario: Monitoring cell voltage in Li-ion battery packs for handheld medical devices. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V for ADC full-scale calibration and coulomb counting. Use Value: ±2.0% initial tolerance and <±8.5 mV temp drift ensure accurate state-of-charge estimation across operating temperature. | Use Scenario: Precision analog input stage for industrial PLC analog I/O modules. IC Role / Device Role / Timing Role: Reference source for 16-bit sigma-delta ADCs measuring 4–20 mA loop signals. Use Value: 20 μVrms noise and 0.5–1.5 Ω dynamic impedance preserve ENOB without external buffering or filtering. |
| Automotive Cabin Sensors | Process Control Transmitters |
Use Scenario: Supplying reference voltage to MEMS pressure and humidity sensors in HVAC control units. IC Role / Device Role / Timing Role: Low-drift, micropower shunt reference enabling always-on cabin air quality sensing. Use Value: AEC-Q100 Grade 3 qualification and 120 ppm long-term stability meet automotive reliability requirements. | Use Scenario: Calibrating 4–20 mA current-loop transmitters in chemical plant field instruments. IC Role / Device Role / Timing Role: Primary voltage reference for DAC-based current output stages. Use Value: Stable 1.225 V output with no external capacitor simplifies loop-powered transmitter PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4041CIM3-1.2 | ±0.5% initial tolerance (C-grade), same SOT-23 package and 1.225 V output | Higher accuracy needed for metrology-grade calibration; tighter temp drift spec | Select when ±12 mV initial error is unacceptable but Grade 3 automotive qualification is not required |
| TLVH431ACDBVR | Adjustable 1.24–18 V output via resistors; 0.5% initial tolerance; higher 80 μA min current | Requires external resistors; suited for programmable references or higher-voltage rails | Choose when design flexibility across multiple output voltages justifies added components and layout area |
Compared with LM4041CIM3-1.2, the LM4041QEIM3-1.2/NO trades initial accuracy for automotive qualification and broader temperature support; versus TLVH431ACDBVR, it offers lower quiescent current and simpler two-terminal implementation at the cost of fixed output voltage.
Availability
LM4041QEIM3-1.2/NO is available at Aetrix Electronics and suitable for automotive cabin sensors, portable battery monitoring, and industrial data acquisition systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4041QEIM3-1.2/NO 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive electronics.
The LM4041-N product line delivers micropower shunt voltage references optimized for space-constrained, low-current applications across automotive, industrial, and portable equipment-emphasizing ease of use, stability without external capacitors, and robust qualification.
FAQ
What is the exact output voltage and tolerance of LM4041QEIM3-1.2/NO?
The LM4041QEIM3-1.2/NO provides a fixed reverse breakdown voltage of 1.225 V with an initial tolerance of ±25 mV (±2.0%) at 25°C, as specified in the E-grade column of TI's SNOS641G datasheet Section 6.6. This tolerance expands to ±36 mV over the full –40°C to +85°C industrial temperature range due to its ±100 ppm/°C temperature coefficient.
Does LM4041QEIM3-1.2/NO require an external output capacitor for stability?
No, the LM4041QEIM3-1.2/NO does not require an external output capacitor. Its internal design ensures stability with any capacitive load-including ADC input capacitance and op-amp inputs-eliminating the need for external stabilization components and reducing BOM count and PCB area in compact designs.
Is LM4041QEIM3-1.2/NO qualified for automotive applications?
Yes, LM4041QEIM3-1.2/NO is AEC-Q100 Grade 3 qualified (–40°C to +85°C ambient), explicitly listed in TI's device information table and features section. This qualification covers stress testing, reliability validation, and temperature performance verification required for non-safety-critical automotive subsystems like cabin sensors and infotainment power rails.
What are the absolute maximum ratings for LM4041QEIM3-1.2/NO?
The absolute maximum ratings for LM4041QEIM3-1.2/NO include 20 mA reverse current, 10 mA forward current, 306 mW power dissipation (SOT-23 at 25°C), and –65°C to +150°C storage temperature. Exceeding these limits may cause permanent damage; recommended operating conditions specify 60 μA–12 mA reverse current and –40°C to +85°C ambient.
How does LM4041QEIM3-1.2/NO compare to adjustable shunt references like TLVH431?
The LM4041QEIM3-1.2/NO offers fixed 1.225 V output with lower minimum operating current (60 μA vs. 80 μA), no external resistors, and smaller SOT-23 footprint versus the adjustable TLVH431ACDBVR. However, TLVH431 supports 1.24–18 V outputs and tighter 0.5% initial tolerance-making LM4041QEIM3-1.2/NO ideal for space- and power-constrained fixed-voltage use cases.
LM4041QEIM3-1.2/NO 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:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 12 mA
- Tolerance:
- ±2%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 70 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041QEIM3-1.2/NO FAQ
1.How can I place an order for LM4041QEIM3-1.2/NO through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041QEIM3-1.2/NO 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 LM4041QEIM3-1.2/NO reliable?
The price and inventory of LM4041QEIM3-1.2/NO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041QEIM3-1.2/NO is usually 5 days.
3.What payment methods are accepted for LM4041QEIM3-1.2/NO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041QEIM3-1.2/NO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041QEIM3-1.2/NO?
LM4041QEIM3-1.2/NO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041QEIM3-1.2/NO 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 LM4041QEIM3-1.2/NO?
For technical support, including LM4041QEIM3-1.2/NO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041QEIM3-1.2/NO requirements.
6.How does Aetrix verify that LM4041QEIM3-1.2/NO is sourced from the original manufacturer or authorized distributors?
All LM4041QEIM3-1.2/NO 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 LM4041QEIM3-1.2/NO meets industry standards.
7.What is the process for return or replacement of LM4041QEIM3-1.2/NO?
All LM4041QEIM3-1.2/NO units undergo pre-shipment inspection (PSI). If there is an issue with LM4041QEIM3-1.2/NO, 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 LM4041QEIM3-1.2/NO part is unused and in its original packaging.
Return procedure for LM4041QEIM3-1.2/NO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041QEIM3-1.2/NO Tags
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