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Texas Instruments LM4041QCEM3-1.2NO
- Part No.:
- LM4041QCEM3-1.2NO
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041QCEM3-1.2NO.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,037
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Product details
Overview
LM4041QCEM3-1.2NO from Texas Instruments is an automotive-grade, precision micropower shunt voltage reference in SC70-5 package with 1.225 V nominal reverse breakdown voltage, ±0.5% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, 60–68 μA minimum operating current, and 20 μVrms wideband noise (10 Hz–10 kHz). It enables accurate voltage regulation in space-constrained automotive sensor signal conditioning circuits.
For engineers reviewing the LM4041QCEM3-1.2NO datasheet, LM4041QCEM3-1.2NO pinout, LM4041QCEM3-1.2NO application, or LM4041QCEM3-1.2NO equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (−40°C to +125°C), no-output-capacitor-required stability, low dynamic impedance (≤1.5 Ω), and compatibility with capacitive loads up to 10 nF.
Technical Context
The LM4041QCEM3-1.2NO implements a bandgap-based shunt reference architecture with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming to achieve ±0.5% initial accuracy. Its three-terminal configuration (Anode, Cathode, FB) supports fixed-voltage operation without external feedback components when used in the 1.225 V variant.
It operates across 60–12,000 μA load current range while maintaining stable reverse breakdown voltage under varying ambient temperatures (−40°C to +125°C) and capacitive loading conditions - eliminating need for output stabilization capacitors and simplifying PCB layout in safety-critical automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; ±6 mV (±0.5%) initial tolerance at 25°C - ensures precise biasing of ADC references or op-amp comparators |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +125°C - limits voltage drift to ±12.3 mV across full automotive temperature range |
| Operating Current | 60–68 μA min, 12 mA max - supports ultra-low-power battery-backed systems and high-current sensing interfaces |
| Noise (10 Hz–10 kHz) | 20 μVrms - minimizes added error in high-resolution data acquisition front-ends |
| Dynamic Impedance | ≤1.5 Ω at 1 mA - maintains tight regulation under fast transient load changes |
| Long-Term Stability | 120 ppm (1000 hrs @ 25°C) - ensures calibration integrity over product lifetime in engine control units |
| Thermal Hysteresis | 0.08% - guarantees repeatable voltage after thermal cycling in under-hood environments |
Pinout & Package
LM4041QCEM3-1.2NO is housed in a 5-pin SC70 package (1.25 mm × 2.00 mm body size) with exposed pad for thermal enhancement. Pin 1 = Anode (ground reference), Pin 2 = NC (no connect), Pin 3 = Cathode (shunt current path/output), Pin 4 = NC, Pin 5 = FB (feedback input - unused in fixed 1.225 V configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Must be connected to system ground; defines cathode voltage relative to this point |
| NC (Pin 2) | Unbonded die terminal | Must remain floating or tied to anode; no internal connection |
| Cathode (Pin 3) | Shunt current sink / output node | Delivers regulated 1.225 V when current flows from external supply through series resistor into this pin |
| NC (Pin 4) | Unbonded die terminal | Must remain floating or tied to anode; no internal connection |
| FB (Pin 5) | Adjustable reference feedback input | Internally connected to bandgap core; unused in LM4041QCEM3-1.2NO (fixed-voltage variant) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C ambient operation per automotive reliability standards |
| No output capacitor required | Stable with any capacitive load (0–10 nF); eliminates BOM cost and board area for stabilization cap |
| Low quiescent current | 60–68 μA minimum operating current enables use in always-on vehicle subsystems |
| Tolerates capacitive loads | Remains stable driving ADC input caps, filter networks, or long PCB traces without oscillation |
| Zener-zap trimmed accuracy | Wafer-level laser trimming achieves ±0.5% initial tolerance without post-package calibration |
Applications
| Automotive Cabin Temperature Sensor | Engine Control Unit (ECU) Reference |
|---|---|
Use Scenario: Precision analog front-end for NTC thermistor measurement in HVAC control module. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for 16-bit delta-sigma ADC converting thermistor voltage. Use Value: Enables ±0.1°C temperature resolution over −40°C to +85°C cabin range due to <100 ppm/°C drift and 20 μVrms noise. |
Use Scenario: Bias reference for knock sensor amplifier and fuel injector driver monitoring circuit. IC Role / Device Role / Timing Role: Shunt reference establishing precise threshold for comparator-based fault detection logic. Use Value: Guarantees consistent trip points across engine bay thermal transients (−40°C to +125°C) with 0.08% thermal hysteresis. |
| ADAS Camera Power Monitor | EV Battery Management System (BMS) Cell Voltage Sense |
Use Scenario: Input reference for voltage supervisor IC monitoring 12 V camera rail during cold cranking. IC Role / Device Role / Timing Role: Supplies accurate 1.225 V to supervisor's internal comparator for undervoltage lockout (UVLO) detection. Use Value: Maintains UVLO accuracy within ±6 mV despite load current variation (60 μA–12 mA) and 100 ppm/°C drift. |
Use Scenario: Reference for isolated sigma-delta ADC measuring individual Li-ion cell voltages in 96-cell pack. IC Role / Device Role / Timing Role: Stable shunt reference enabling 0.1% full-scale accuracy in galvanically isolated voltage sensing channel. Use Value: Achieves 120 ppm long-term stability over 1000 hrs, reducing recalibration frequency in high-reliability BMS 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 |
|---|---|---|---|
| TL4050C12IDBZR | Fixed 1.2 V output, ±0.5% initial tolerance, SOT-23-3 package, 100 ppm/°C tempco, 60 μA min current | Non-automotive grade (industrial only); lacks AEC-Q100 qualification and extended temp range support | Select TL4050C12IDBZR only for cost-sensitive non-automotive designs where Grade 1 qualification is unnecessary |
| MAX6008AEUR+T | Fixed 1.25 V output, ±0.2% initial tolerance, SOT-23-3 package, 75 ppm/°C tempco, 60 μA min current | Higher initial accuracy but not AEC-Q100 qualified; rated only to +85°C ambient | Choose MAX6008AEUR+T when tighter initial tolerance is critical and automotive temperature range is not required |
Compared with TL4050C12IDBZR and MAX6008AEUR+T, LM4041QCEM3-1.2NO uniquely combines AEC-Q100 Grade 1 qualification, SC70-5 footprint for ultra-compact layouts, and guaranteed stability with capacitive loads - making it the sole option for space-constrained, high-reliability automotive voltage referencing.
Availability
LM4041QCEM3-1.2NO is available at Aetrix Electronics and suitable for automotive sensor modules, engine control units, ADAS power monitors, and EV battery management systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for LM4041QCEM3-1.2NO 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 delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.
The LM4041-N-Q1 product line delivers precision shunt voltage references engineered specifically for automotive applications demanding AEC-Q100 qualification, extended temperature operation, and high long-term stability in harsh environments.
FAQ
What is the maximum operating temperature range for LM4041QCEM3-1.2NO?
The LM4041QCEM3-1.2NO is AEC-Q100 Grade 1 qualified and specified for continuous operation from −40°C to +125°C ambient temperature. This rating is validated per TI's automotive qualification protocol and applies to the full electrical performance envelope defined in the datasheet's Extended Temperature Range tables.
Does LM4041QCEM3-1.2NO require an external output capacitor?
No, LM4041QCEM3-1.2NO does not require an external output capacitor. Its internal design ensures stability with any capacitive load from 0 to 10 nF, including direct connection to ADC input capacitors or long PCB traces - a key advantage over older shunt references that mandate minimum capacitance.
What is the function of Pin 5 (FB) on LM4041QCEM3-1.2NO?
Pin 5 (FB) is the feedback input used only in adjustable versions (e.g., LM4041QCEM3-ADJ). In the LM4041QCEM3-1.2NO fixed-voltage variant, FB is internally connected to the bandgap core and must be left floating or tied to the anode (Pin 1); it has no external function and does not affect 1.225 V regulation.
How does LM4041QCEM3-1.2NO achieve ±0.5% initial accuracy?
LM4041QCEM3-1.2NO achieves ±0.5% initial accuracy via Zener-zap trimming during wafer sort, where laser fusing adjusts the reference voltage at the die level. This process is performed before packaging and ensures the specification is met without post-assembly calibration or sorting.
Is LM4041QCEM3-1.2NO compatible with lead-free reflow soldering?
Yes, LM4041QCEM3-1.2NO supports standard lead-free reflow profiles. Its SC70-5 package is rated for vapor phase (215°C), infrared (220°C), and soldering (260°C) per JEDEC J-STD-020, with full thermal derating guidance provided in Section 6.1 of the SNOS641G datasheet.
LM4041QCEM3-1.2NO 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:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 68 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041QCEM3-1.2NO FAQ
1.How can I place an order for LM4041QCEM3-1.2NO through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041QCEM3-1.2NO 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 LM4041QCEM3-1.2NO reliable?
The price and inventory of LM4041QCEM3-1.2NO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041QCEM3-1.2NO is usually 5 days.
3.What payment methods are accepted for LM4041QCEM3-1.2NO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041QCEM3-1.2NO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041QCEM3-1.2NO?
LM4041QCEM3-1.2NO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041QCEM3-1.2NO 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 LM4041QCEM3-1.2NO?
For technical support, including LM4041QCEM3-1.2NO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041QCEM3-1.2NO requirements.
6.How does Aetrix verify that LM4041QCEM3-1.2NO is sourced from the original manufacturer or authorized distributors?
All LM4041QCEM3-1.2NO 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 LM4041QCEM3-1.2NO meets industry standards.
7.What is the process for return or replacement of LM4041QCEM3-1.2NO?
All LM4041QCEM3-1.2NO units undergo pre-shipment inspection (PSI). If there is an issue with LM4041QCEM3-1.2NO, 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 LM4041QCEM3-1.2NO part is unused and in its original packaging.
Return procedure for LM4041QCEM3-1.2NO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041QCEM3-1.2NO Tags
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