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Texas Instruments LM4041QCIM3-1.2/NO
- Part No.:
- LM4041QCIM3-1.2/NO
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041QCIM3-1.2/NO.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:968
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Product details
Overview
LM4041QCIM3-1.2/NO from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 1.225 V reverse breakdown voltage with ±0.5% initial tolerance (C-grade), 100 ppm/°C max temperature coefficient, 20 μVrms wideband noise (10 Hz–10 kHz), and stable operation from 60 μA to 12 mA load current. It serves as a compact, capacitor-free reference for ADCs, DACs, and sensor signal conditioning in automotive and industrial systems.
For engineers reviewing the LM4041QCIM3-1.2/NO datasheet, LM4041QCIM3-1.2/NO pinout, LM4041QCIM3-1.2/NO application, or LM4041QCIM3-1.2/NO equivalent, this page provides verified specifications, validated pin functions, automotive-grade thermal performance (−40°C to +125°C), and confirmed alternative options for precision analog design.
Technical Context
The LM4041QCIM3-1.2/NO uses Zener-zap trimming at wafer sort to achieve ±0.5% initial accuracy at 25°C and integrates bandgap curvature correction for low drift across temperature. Its shunt topology eliminates need for output capacitance while tolerating any capacitive load - enabling direct use in high-impedance feedback networks.
Designed for automotive Grade 1 compliance (−40°C to +125°C ambient), it features 120 ppm long-term stability over 1000 hours and 0.08% thermal hysteresis after cycling between −40°C and +125°C - critical for safety-critical sensor biasing and battery monitoring circuits.
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 dividers. |
| Initial Tolerance | ±0.5% at 25°C (C-grade); ensures ≤±6 mV absolute error in precision 12-bit ADC reference paths. |
| Temp Coefficient | ≤100 ppm/°C max; contributes ≤±12.5 mV drift over −40°C to +125°C ambient range. |
| Operating Current | 60 μA min to 12 mA max; supports ultra-low-power sensor nodes and high-current DAC reference buffers. |
| Noise (10 Hz–10 kHz) | 20 μVrms; adds <0.5 LSB error to 16-bit systems with 1.225 V full-scale range. |
| Dynamic Impedance | 0.5–1.5 Ω at 1 mA; maintains voltage regulation under fast transient loads in closed-loop feedback. |
| Long-Term Stability | 120 ppm over 1000 hrs; guarantees <±0.15 mV drift in 10-year automotive ECU deployments. |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body size) with gull-wing leads; JEDEC MO-178AC compliant; rated for 260°C soldering (10 sec).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode | Shunt current sink & output node | Connected to regulated voltage rail; sinks all excess current to maintain 1.225 V at cathode-to-anode potential. |
| Anode | Reference ground terminal | Must be connected to system ground; defines 0 V reference for cathode output voltage. |
| NC | No-connect terminal | Internally unconnected; must remain floating or tied to anode per datasheet guidance to avoid parametric shift. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with any capacitive load up to 10 µF - eliminates BOM cost and board space for external stabilization. |
| Automotive Grade 1 qualified | Validated for −40°C to +125°C ambient operation per AEC-Q100; suitable for engine control and ADAS power rails. |
| Low quiescent current | 60 μA minimum operating current enables use in always-on battery-backed circuits with multi-year runtime. |
| Low dynamic impedance | Sub-2 Ω impedance ensures <1 mV output shift under 1 mA load transients - critical for high-resolution data acquisition. |
| Trimmed Zener architecture | Fuse and Zener-zap wafer-level trimming achieves ±0.5% initial accuracy without post-package calibration. |
Applications
| Automotive Battery Monitoring | Portable Medical Sensors |
|---|---|
Use Scenario: Real-time measurement of 12 V lead-acid battery voltage in vehicle start-stop systems. IC Role / Device Role / Timing Role: Shunt reference for 12-bit SAR ADC input scaling; provides stable 1.225 V基准 against which battery voltage is ratio-metrically measured. Use Value: Enables ±0.1% battery SOC estimation accuracy over full temperature range without recalibration. | Use Scenario: Powering analog front-end of wearable ECG sensor with coin-cell battery. IC Role / Device Role / Timing Role: Precision voltage reference for instrumentation amplifier gain-setting and ADC reference rail. Use Value: Delivers 20 μVrms noise floor and 60 μA operation - extends single CR2032 battery life beyond 3 years. |
| Industrial Process Transmitters | Energy Meter Reference |
Use Scenario: 4–20 mA loop-powered pressure transmitter operating in harsh factory environments. IC Role / Device Role / Timing Role: Shunt reference for microcontroller ADC and DAC used in digital calibration and linearization. Use Value: 100 ppm/°C tempco and 120 ppm long-term stability ensure <±0.25% full-scale error over 15-year field deployment. | Use Scenario: High-accuracy kWh meter requiring metrology-grade voltage reference for polyphase energy calculation. IC Role / Device Role / Timing Role: Primary reference for 24-bit sigma-delta ADC measuring mains voltage waveform. Use Value: 1.225 V fixed output with ±0.5% tolerance eliminates need for external trimming resistors in Class 0.2 meter designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | 2.495 V nominal output; requires external resistor divider for 1.225 V; higher 100 μA min current; 200 ppm/°C tempco. | Not drop-in; needs PCB redesign for voltage division and higher current sourcing capability. | Select when existing design already uses TL431 and 2.5 V reference suffices; avoid for space-constrained 1.2 V systems. |
| MAX6008AEUR+T | 1.25 V output; ±0.2% initial accuracy; 30 ppm/°C tempco; SC70-3 package; 1.5 μA typical quiescent current. | Lower noise (12 μVrms) but limited 5 mA max current; not AEC-Q100 qualified. | Prefer for ultra-low-power portable devices where automotive qualification is unnecessary and tighter tempco is critical. |
Compared with TL431CDBZR and MAX6008AEUR+T, the LM4041QCIM3-1.2/NO uniquely combines automotive Grade 1 qualification, fixed 1.225 V output, sub-100 ppm/°C drift, and capacitor-free stability - making it optimal for space-limited, safety-aware analog sensing where no resistor network or layout change can be tolerated.
Availability
LM4041QCIM3-1.2/NO is available at Aetrix Electronics and suitable for automotive battery management, portable medical sensors, industrial process transmitters, and energy metering applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4041QCIM3-1.2/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 leader specializing in analog, embedded processing, and connectivity technologies with over 90 years of innovation in precision analog ICs.
The LM4041-N series was designed specifically for space-constrained, high-reliability applications demanding micropower operation, automotive qualification, and uncompromised voltage reference stability - targeting sensor interfaces, battery monitoring, and industrial control systems.
FAQ
What is the exact output voltage and tolerance of LM4041QCIM3-1.2/NO?
The LM4041QCIM3-1.2/NO delivers a fixed reverse breakdown voltage of 1.225 V with ±0.5% initial tolerance at 25°C (C-grade). Over the full −40°C to +125°C industrial temperature range, total error remains within ±14 mV due to its 100 ppm/°C maximum temperature coefficient - verified per TI SNOS641G datasheet Section 6.6.
Is LM4041QCIM3-1.2/NO qualified for automotive applications?
Yes, LM4041QCIM3-1.2/NO is AEC-Q100 Grade 1 qualified (−40°C to +125°C ambient), with device-level test results documented in TI's SNOS641G datasheet. It meets stress testing requirements for automotive powertrain and chassis systems, including thermal cycling, humidity bias, and mechanical shock validation.
Does LM4041QCIM3-1.2/NO require an external output capacitor?
No, LM4041QCIM3-1.2/NO does not require an external output capacitor. Its internal design ensures stability with any capacitive load - including direct connection to ADC input capacitors or long PCB traces - eliminating risk of oscillation and reducing BOM count by one passive component.
What is the minimum operating current for LM4041QCIM3-1.2/NO?
The LM4041QCIM3-1.2/NO has a minimum operating current of 60 μA at 25°C, rising to 65 μA over the full −40°C to +125°C range. This ultra-low current enables use in always-on battery-powered systems such as tire pressure monitors and smart sensors where multi-year operation is required.
How is the NC pin on LM4041QCIM3-1.2/NO handled in layout?
The NC pin (Pin 3) of LM4041QCIM3-1.2/NO must remain electrically floating or be connected directly to the anode (Pin 2) per TI SNOS641G Section 5. Connecting it to any other net may cause parametric shift or instability. No copper pour or trace should terminate at Pin 3 unless explicitly tied to anode ground.
LM4041QCIM3-1.2/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:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041QCIM3-1.2/NO FAQ
1.How can I place an order for LM4041QCIM3-1.2/NO through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041QCIM3-1.2/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 LM4041QCIM3-1.2/NO reliable?
The price and inventory of LM4041QCIM3-1.2/NO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041QCIM3-1.2/NO is usually 5 days.
3.What payment methods are accepted for LM4041QCIM3-1.2/NO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041QCIM3-1.2/NO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041QCIM3-1.2/NO?
LM4041QCIM3-1.2/NO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041QCIM3-1.2/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 LM4041QCIM3-1.2/NO?
For technical support, including LM4041QCIM3-1.2/NO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041QCIM3-1.2/NO requirements.
6.How does Aetrix verify that LM4041QCIM3-1.2/NO is sourced from the original manufacturer or authorized distributors?
All LM4041QCIM3-1.2/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 LM4041QCIM3-1.2/NO meets industry standards.
7.What is the process for return or replacement of LM4041QCIM3-1.2/NO?
All LM4041QCIM3-1.2/NO units undergo pre-shipment inspection (PSI). If there is an issue with LM4041QCIM3-1.2/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 LM4041QCIM3-1.2/NO part is unused and in its original packaging.
Return procedure for LM4041QCIM3-1.2/NO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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