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Texas Instruments LM4041DIM3X-1.2
- Part No.:
- LM4041DIM3X-1.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DIM3X-1.2.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,799
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Product details
Overview
LM4041DIM3X-1.2 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 ±0.2% initial tolerance (B-grade), 100 ppm/°C max temperature coefficient, and 20 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 12 mA load current and supports stable regulation without output capacitance-ideal for low-power sensor biasing in portable instrumentation.
For engineers reviewing the LM4041DIM3X-1.2 datasheet, LM4041DIM3X-1.2 pinout, LM4041DIM3X-1.2 application, or LM4041DIM3X-1.2 equivalent, key selection criteria include its guaranteed 1.225 V output at 100 μA, industrial temperature range (−40°C to +85°C), no-output-capacitor operation, and compatibility with capacitive loads in space-constrained analog front-ends.
Technical Context
The LM4041DIM3X-1.2 uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, enabling stable 1.225 V reference across −40°C to +85°C. Its low 0.5–1.5 Ω dynamic impedance ensures minimal output variation under load transients.
It functions as a two-terminal shunt regulator: cathode supplies regulated voltage while anode connects to system ground. Feedback pin is absent-this is the fixed 1.2 V variant, not the adjustable ADJ version-eliminating external resistor networks and simplifying PCB layout for single-voltage reference needs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal, ±0.2% initial tolerance at 25°C - enables high-accuracy ADC/DAC biasing without trimming |
| Tempco | ≤100 ppm/°C over −40°C to +85°C - ensures ≤±8.5 mV drift across full industrial range |
| Operating Current | 60 μA min to 12 mA max - supports ultra-low-power sensor nodes and battery-backed systems |
| Noise (10 Hz–10 kHz) | 20 μVrms - suitable for 16-bit+ data acquisition where reference noise limits ENOB |
| Dynamic Impedance | 0.5–1.5 Ω at 1 mA - maintains <1 mV output shift under 1 mA load step, critical for precision feedback loops |
| Long-Term Stability | 120 ppm after 1000 hrs - predictable aging behavior for calibration-critical medical and test equipment |
| Thermal Hysteresis | 0.08% - contributes <±0.98 mV error after thermal cycling, supporting repeatable metrology performance |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body), surface-mount, JEDEC MO-178 compatible. Pin 1 = Cathode (output), Pin 2 = Anode (ground), Pin 3 = NC (no connect, must float or tie to anode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Cathode) | Output terminal / shunt current sink | Provides regulated 1.225 V at cathode-to-anode; sinks all load + reference current; connects to VREF net |
| Pin 2 (Anode) | Reference ground node | Must be connected to system ground; serves as return path for shunt current; defines output voltage reference point |
| Pin 3 (NC) | No-connect terminal | Internally unconnected; must remain floating or tied to anode per datasheet-no routing or soldering required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with any capacitive load up to 10 µF-eliminates BOM cost and board area for decoupling in wearables and IoT sensors |
| Micropower operation | 60 μA minimum operating current enables >10-year battery life in coin-cell-powered devices |
| Low thermal hysteresis | 0.08% hysteresis minimizes calibration drift after thermal cycling in automotive cabin modules |
| Robust ESD rating | ±2 kV HBM-survives handling in standard assembly lines without special ESD controls |
| Fixed 1.225 V output | Eliminates external resistor divider errors and layout sensitivity of adjustable references in compact PCBs |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered pulse oximeter front-end requiring stable 1.225 V bias for photodiode transimpedance amplifier. IC Role / Device Role / Timing Role: Shunt voltage reference providing precision DC bias point for analog signal chain. Use Value: 20 μVrms noise and 100 ppm/°C tempco ensure <±0.5% measurement accuracy across 0–40°C patient temperature range. |
Use Scenario: Remote environmental monitor logging temperature/humidity using 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Primary reference source for ADC internal conversion and external sensor excitation. Use Value: 60 μA min current and no-output-capacitor operation enable direct integration into ultra-low-quiescent power supply rails. |
| Automotive Cabin Controllers | Precision Audio DAC Reference |
Use Scenario: HVAC control module sensing cabin air quality with electrochemical gas sensors. IC Role / Device Role / Timing Role: Stable shunt reference for ratiometric sensor excitation and ADC reference in AEC-Q100 Grade 1 design. Use Value: −40°C to +125°C extended temp grade support (LM4041-N-Q1 variant) ensures reliability in under-dash environments. |
Use Scenario: High-fidelity portable audio DAC requiring ultra-low-noise analog reference for 24-bit resolution. IC Role / Device Role / Timing Role: Low-noise DC reference for DAC's internal voltage ladder and external op-amp buffer. Use Value: 20 μVrms broadband noise directly limits THD+N floor, preserving >110 dB SNR in portable headphone amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4041CIM3X-1.2 | ±0.5% initial tolerance (C-grade), same 100 ppm/°C tempco and 20 μVrms noise | Lower accuracy acceptable in non-critical biasing (e.g., LED current setting, comparator thresholds) | Select when cost sensitivity outweighs 0.3% absolute voltage error in production calibration budgets |
| TLVH431IDBZR | Adjustable 1.24–18 V output via resistors; 2% initial tolerance; 300 ppm/°C tempco; 25 μVrms noise | Requires external resistors; higher tempco increases drift in wide-temperature deployments | Choose only when programmable output voltage is mandatory and ±2% reference accuracy suffices |
Compared with LM4041CIM3X-1.2, the LM4041DIM3X-1.2 offers tighter initial tolerance for calibrated systems; compared with TLVH431IDBZR, it delivers superior noise, tempco, and simplicity-no resistors, no layout sensitivity-making it optimal for fixed-voltage, high-stability use cases.
Availability
LM4041DIM3X-1.2 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, and automotive cabin controllers requiring stable component supply with guaranteed long-term parametric consistency.
Supply support for LM4041DIM3X-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 specializing in analog and embedded processing technologies, with decades of expertise in precision reference design and automotive-qualified components.
The LM4041-N series was engineered for space-constrained, low-power applications demanding high initial accuracy and thermal stability-targeting portable instrumentation, battery-operated sensors, and automotive subsystems where reference integrity directly impacts measurement fidelity.
FAQ
What is the output voltage tolerance of LM4041DIM3X-1.2 over temperature?
The LM4041DIM3X-1.2 has ±0.2% initial tolerance at 25°C and a maximum temperature coefficient of 100 ppm/°C. Over the industrial range (−40°C to +85°C), total output voltage error is ±0.85% (±0.2% + 100 ppm/°C × 65°C), equating to ±10.4 mV on 1.225 V. This is confirmed in Section 6.5 of the SNOS641G datasheet for B-grade devices.
Does LM4041DIM3X-1.2 require an external output capacitor?
No, the LM4041DIM3X-1.2 does not require an external output capacitor. Its internal design ensures stability with any capacitive load-including 0 µF-making it ideal for space-limited designs. This is explicitly stated in the "Features" and "Description" sections of the TI datasheet SNOS641G.
What is the minimum operating current for LM4041DIM3X-1.2?
The LM4041DIM3X-1.2 requires a minimum operating current of 60 μA at 25°C and 65 μA across the full industrial temperature range (−40°C to +85°C), as specified in Table 6.5 of the SNOS641G datasheet. Below this current, regulation is not guaranteed.
Is LM4041DIM3X-1.2 qualified for automotive applications?
The LM4041DIM3X-1.2 is part of the LM4041-N family, which includes AEC-Q100 Grade 1 (−40°C to +125°C) and Grade 3 (−40°C to +85°C) variants. While LM4041DIM3X-1.2 itself is rated for industrial temperature range, the pin-compatible LM4041QDIM3X-1.2 is the AEC-Q100 qualified version-both share identical electrical specs except for qualification testing.
What is the noise performance of LM4041DIM3X-1.2?
The LM4041DIM3X-1.2 delivers 20 μVrms wideband noise over 10 Hz to 10 kHz, as measured per the conditions in Section 6.5 of SNOS641G. This low noise supports high-resolution data acquisition systems where reference noise directly limits effective number of bits (ENOB).
LM4041DIM3X-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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 12 mA
- Tolerance:
- ±1%
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041DIM3X-1.2 FAQ
1.How can I place an order for LM4041DIM3X-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DIM3X-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 LM4041DIM3X-1.2 reliable?
The price and inventory of LM4041DIM3X-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 LM4041DIM3X-1.2 is usually 5 days.
3.What payment methods are accepted for LM4041DIM3X-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DIM3X-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DIM3X-1.2?
LM4041DIM3X-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DIM3X-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 LM4041DIM3X-1.2?
For technical support, including LM4041DIM3X-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DIM3X-1.2 requirements.
6.How does Aetrix verify that LM4041DIM3X-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041DIM3X-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 LM4041DIM3X-1.2 meets industry standards.
7.What is the process for return or replacement of LM4041DIM3X-1.2?
All LM4041DIM3X-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DIM3X-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 LM4041DIM3X-1.2 part is unused and in its original packaging.
Return procedure for LM4041DIM3X-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041DIM3X-1.2 Tags
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