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Texas Instruments LM4041CIM3X-1.2
- Part No.:
- LM4041CIM3X-1.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CIM3X-1.2.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,104
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Product details
Overview
LM4041CIM3X-1.2 from Texas Instruments is a precision 1.225 V shunt voltage reference in SOT-23-3 package, rated for extended temperature operation (−40°C to +125°C), with ±0.5% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise (10 Hz–10 kHz). It serves as a stable reference in ADC/DAC biasing, battery monitoring, and automotive sensor signal conditioning circuits.
For engineers reviewing the LM4041CIM3X-1.2 datasheet, LM4041CIM3X-1.2 pinout, LM4041CIM3X-1.2 application, or LM4041CIM3X-1.2 equivalent, key selection criteria include its guaranteed operation down to 60 μA cathode current, no-output-capacitor requirement, capacitive-load stability, reverse breakdown voltage accuracy over full industrial and extended temperature ranges, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4041CIM3X-1.2 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 low dynamic impedance (≤1.5 Ω at 1 mA) and high PSRR enable stable regulation under varying load and supply conditions.
Designed for space-constrained systems, it operates without an external stabilization capacitor and tolerates arbitrary capacitive loads - eliminating layout sensitivity and simplifying design across portable instrumentation, energy metering, and automotive control modules where thermal cycling and long-term drift must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.225 V nominal reverse breakdown voltage, fixed output - sets precise bias point for analog front-ends and feedback loops. |
| Initial Tolerance | ±6 mV (±0.5%) at 25°C - enables high-resolution measurement without post-calibration in production test. |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +125°C - ensures ≤±12.3 mV total drift across full operating range. |
| Operating Current | 60 μA to 12 mA - supports ultra-low-power sensor nodes and high-current precision DAC references. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz) - minimizes added uncertainty in 16-bit+ data acquisition systems. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA - maintains voltage stability against fast load transients in closed-loop regulators. |
| Long-Term Stability | 120 ppm after 1000 hours - predicts <0.012% output shift over typical product lifetime. |
Pinout & Package
SOT-23-3 package (DBZ), body size 1.30 mm × 2.92 mm, surface-mount, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / output node | Connected to regulated voltage rail; sinks current to maintain 1.225 V across external resistor network. |
| Anode (Pin 2) | Reference ground return | Typically tied to system ground; forms the reference potential for cathode voltage regulation. |
| NC (Pin 3) | No-connect terminal | Must float or connect to anode per TI recommendation for EMI immunity; not internally bonded in 1.2-V fixed version. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Eliminates BOM cost and board area for stability compensation - reduces design cycle time and failure modes. |
| Capacitive load tolerance | Stable with any value of output capacitance - enables direct connection to ADC input caps or noisy digital rails without oscillation. |
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C ambient operation in automotive ECUs and ADAS sensors - meets functional safety readiness requirements. |
| Low 60 μA minimum current | Enables use in always-on battery-backed circuits (e.g., RTC supervisors, tamper-detection monitors) with sub-1 μW quiescent power. |
| 20 μVRMS noise floor | Preserves ENOB in 16-bit SAR ADCs - avoids need for additional low-noise LDO filtering stages. |
Applications
| Battery Monitoring System | Automotive Sensor Signal Chain |
|---|---|
Use Scenario: Real-time cell voltage sampling in 12 V lead-acid or Li-ion battery packs for state-of-charge estimation. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for 12-bit ADC inputs measuring shunt-based current and voltage rails. Use Value: ±0.5% initial tolerance and ≤100 ppm/°C drift ensure <±5 mV absolute error over vehicle lifetime, meeting ISO 16750-4 cold-cranking and thermal shock requirements. |
Use Scenario: Conditioning output of pressure or temperature sensors in engine control units under under-hood thermal stress. IC Role / Device Role / Timing Role: Supplies excitation and reference voltage for ratiometric bridge amplifiers and sigma-delta ADCs. Use Value: AEC-Q100 Grade 1 rating and 125°C junction capability allow placement near hot components without derating; low noise prevents SNR degradation in high-gain sensor interfaces. |
| Portable Energy Metering | Industrial Process Controller |
Use Scenario: High-accuracy kWh measurement in Class 0.5 smart meters powered by supercapacitors during mains outage. IC Role / Device Role / Timing Role: Reference source for metrology-grade ADCs digitizing current transformer and voltage divider outputs. Use Value: 20 μVRMS noise and 120 ppm long-term stability meet IEC 62053-22 accuracy retention requirements over 10-year field deployment. |
Use Scenario: Analog I/O module in PLC backplanes requiring stable calibration across factory ambient swings (−25°C to +70°C). IC Role / Device Role / Timing Role: Precision voltage reference for DAC output buffers and analog input scaling networks. Use Value: Guaranteed 60 μA–12 mA operation allows seamless integration into both low-power standby and full-load active states without re-biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3X-ADJ | Adjustable output (1.24 V–10 V) via external resistor divider; same SOT-23-3 package and ±0.5% grade; higher 150 nA FB pin current. | Requires two external resistors; less suitable for fixed-voltage designs but enables multi-rail reference sharing. | Select when system needs programmable reference voltage or shared reference across multiple supply domains. |
| MAX6008AEUR+T | 1.25 V output, ±0.2% initial accuracy, 75 ppm/°C tempco, SC70-3 package; higher 1.5 μA min current; not AEC-Q100 qualified. | Lower drift and tighter tolerance but lacks automotive qualification and extended temperature support. | Select for non-automotive industrial applications prioritizing ultra-low drift over qualification or wide temperature coverage. |
Compared with LM4041CIM3X-1.2, LM4040CIM3X-ADJ trades fixed-voltage simplicity for flexibility and MAX6008AEUR+T offers better initial accuracy and tempco at the cost of automotive compliance and low-current operation - making LM4041CIM3X-1.2 optimal for cost-sensitive, thermally demanding automotive and industrial shunt reference roles.
Availability
LM4041CIM3X-1.2 is available at Aetrix Electronics and suitable for battery-powered equipment, automotive electronics, and precision data-acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041CIM3X-1.2 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, with deep expertise in precision analog, power management, and automotive electronics.
The LM4041-N series was developed to provide space-efficient, high-stability shunt references for automotive, industrial, and portable instrumentation applications where accuracy, thermal robustness, and layout simplicity are critical.
FAQ
What is the maximum operating temperature range for the LM4041CIM3X-1.2?
The LM4041CIM3X-1.2 is specified for operation from −40°C to +125°C ambient temperature and is AEC-Q100 Grade 1 qualified. This extended temperature range ensures reliable performance in under-hood automotive environments and industrial control cabinets without thermal derating. The device's 100 ppm/°C max temperature coefficient guarantees predictable behavior across this full span.
Does the LM4041CIM3X-1.2 require an external output capacitor for stability?
No, the LM4041CIM3X-1.2 does not require an external output capacitor. Its internal design provides inherent stability across all capacitive loads, including direct connection to ADC input capacitors or noisy digital supply rails. This eliminates risk of oscillation and reduces bill-of-materials cost and PCB area - a key advantage over older shunt references that mandate careful capacitor selection.
What is the minimum cathode current needed for the LM4041CIM3X-1.2 to regulate accurately?
The LM4041CIM3X-1.2 requires a minimum cathode current of 60 μA at 25°C to maintain regulation within specification. At temperature extremes (−40°C or +125°C), the minimum increases to 68 μA. This ultra-low operating current enables use in always-on, battery-backed subsystems such as real-time clocks or tamper detection circuits where power budgets are constrained to microwatts.
How does the LM4041CIM3X-1.2 compare to the LM4040 series in terms of noise performance?
The LM4041CIM3X-1.2 delivers 20 μVRMS wideband noise (10 Hz–10 kHz), matching the LM4040C grade. Both share identical noise characteristics due to common bandgap core design. However, the LM4041CIM3X-1.2 adds AEC-Q100 Grade 1 qualification and guaranteed capacitive-load stability - making it preferable for automotive and high-reliability industrial applications where noise alone is insufficient for selection.
Is the LM4041CIM3X-1.2 pin-compatible with other LM4041 variants in SOT-23-3?
Yes, the LM4041CIM3X-1.2 shares identical SOT-23-3 (DBZ) pinout with all fixed-output LM4041-N and LM4041-N-Q1 variants, including LM4041AIM3X-1.2 and LM4041BIM3X-1.2. Pin 1 is Cathode, Pin 2 is Anode, and Pin 3 is NC (to be floated or tied to Anode). This allows drop-in replacement across accuracy grades without PCB redesign.
LM4041CIM3X-1.2 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:
- Not For New Designs
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041CIM3X-1.2 FAQ
1.How can I place an order for LM4041CIM3X-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CIM3X-1.2 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 LM4041CIM3X-1.2 reliable?
The price and inventory of LM4041CIM3X-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CIM3X-1.2 is usually 5 days.
3.What payment methods are accepted for LM4041CIM3X-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CIM3X-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CIM3X-1.2?
LM4041CIM3X-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CIM3X-1.2 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 LM4041CIM3X-1.2?
For technical support, including LM4041CIM3X-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CIM3X-1.2 requirements.
6.How does Aetrix verify that LM4041CIM3X-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041CIM3X-1.2 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 LM4041CIM3X-1.2 meets industry standards.
7.What is the process for return or replacement of LM4041CIM3X-1.2?
All LM4041CIM3X-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CIM3X-1.2, 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 LM4041CIM3X-1.2 part is unused and in its original packaging.
Return procedure for LM4041CIM3X-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041CIM3X-1.2 Tags
-
TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
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