My Inquiry
My Account
Texas Instruments LM4041CEM3X-1.2
- Part No.:
- LM4041CEM3X-1.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CEM3X-1.2.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,905
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4041CEM3X-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 ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and 20 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 12 mA over −40°C to +125°C and requires no output capacitor-ideal for space-constrained, battery-powered sensor front-ends.
For engineers reviewing the LM4041CEM3X-1.2 datasheet, LM4041CEM3X-1.2 pinout, LM4041CEM3X-1.2 application, or LM4041CEM3X-1.2 equivalent, key selection criteria include extended-temperature stability, low quiescent current, shunt topology compatibility with high-impedance feedback networks, and absence of external capacitance requirements in portable instrumentation designs.
Technical Context
The LM4041CEM3X-1.2 uses bandgap-derived curvature-corrected Zener-zap trimming at wafer sort to achieve ±0.5% initial accuracy at 25°C and maintains stable regulation across capacitive loads up to 10 nF without oscillation. Its shunt architecture sinks current through the cathode to maintain precise voltage at the anode node, enabling use as a two-terminal reference in floating or ground-referenced configurations.
It features fuse-based voltage trim, low dynamic impedance (≤1.5 Ω at 1 mA), and thermal hysteresis of only 0.08% over −40°C to +125°C cycling-critical for repeatable measurements in automotive engine control units and industrial data loggers where ambient temperature swings exceed 100°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; fixed value-no external resistors required for basic reference use. |
| Initial Tolerance | ±0.5% at 25°C (C grade)-enables direct replacement of higher-cost references in cost-sensitive industrial sensors. |
| Temp Coefficient | ≤100 ppm/°C (max)-ensures ≤±12.3 mV drift over −40°C to +125°C operating range. |
| Operating Current | 60 μA min / 12 mA max-supports ultra-low-power wake-up circuits and high-current DAC biasing. |
| Noise (10 Hz–10 kHz) | 20 μVrms-sufficient for 12-bit ADC reference in portable multimeters and environmental monitors. |
| Long-Term Stability | 120 ppm (1000 hrs @ 25°C)-predictable aging behavior for calibration-critical medical devices. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA-minimizes load-induced voltage shift in precision current-sense amplifier feedback paths. |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body size) with gull-wing leads; thermally optimized for PCB mounting with 291.9°C/W junction-to-ambient resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode | Shunt current sink / output node | Voltage is regulated at this terminal relative to anode; connects to load and/or feedback network. |
| Anode | Reference ground / return path | Typically tied to system ground; forms the reference potential for cathode voltage. |
| NC | No-connect | Internally unconnected; must remain floating or tied to anode per datasheet guidance. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with any capacitive load up to 10 nF-eliminates BOM cost and layout area for decoupling in wearables. |
| Extended temperature range | Rated for −40°C to +125°C ambient-qualified for under-hood automotive and industrial motor drive applications. |
| Low quiescent current | 60 μA minimum operating current enables operation from coin-cell batteries for >10-year shelf life in IoT endpoint nodes. |
| Low noise performance | 20 μVrms broadband noise supports 12-bit resolution in portable test equipment without external filtering. |
| Trimmed accuracy | Zener-zap wafer-level trimming ensures ±0.5% initial tolerance-reduces need for system-level calibration in factory-set instruments. |
Applications
| Portable Gas Sensors | Automotive Cabin Pressure Modules |
|---|---|
Use Scenario: Electrochemical gas sensor biasing in handheld air quality monitors requiring stable excitation voltage across temperature swings. IC Role / Device Role / Timing Role: Two-terminal shunt reference providing 1.225 V excitation to sensor electrodes while sinking variable leakage current. Use Value: Eliminates need for external capacitor and reduces PCB footprint by 30% vs. three-terminal references-critical for sub-20 mm² sensor modules. | Use Scenario: Reference for differential pressure transducer signal conditioning in HVAC control units exposed to under-dash temperatures. IC Role / Device Role / Timing Role: Precision voltage node for op-amp gain-setting resistors in bridge amplifier front-end. Use Value: 100 ppm/°C tempco ensures <±1 LSB error in 12-bit ADC over full −40°C to +125°C range-meets AEC-Q100 Grade 1 requirements. |
| Industrial Data Loggers | Medical Infusion Pump Controllers |
Use Scenario: Calibration reference for multi-channel thermistor and RTD measurement circuits in battery-powered field recorders. IC Role / Device Role / Timing Role: Stable voltage source for ratiometric ADC reference and analog switch biasing in multiplexed sensor arrays. Use Value: 120 ppm long-term stability allows 6-month recalibration intervals-reducing maintenance cost in remote deployment scenarios. | Use Scenario: Reference for current-sense amplifier in motor-driven syringe actuation circuit requiring fail-safe dose accuracy. IC Role / Device Role / Timing Role: Shunt-regulated node establishing precise 1.225 V threshold for overcurrent detection comparators. Use Value: Low 60 μA minimum current enables reliable operation during brown-out conditions-supporting IEC 62304 Class C safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | 2.495 V nominal output; 3-pin adjustable topology; requires external resistors for 1.225 V setting; 50 ppm/°C tempco. | Higher output voltage necessitates resistor divider-introduces additional error sources and board area. | Select when existing design already uses TL431 and 2.5 V reference suffices; avoid if 1.225 V exact match or minimal component count is required. |
| MAX6008AEUR+T | 1.25 V output; ±0.2% initial tolerance (A grade); 75 ppm/°C tempco; SC70-3 package; 50 μA min current. | Higher accuracy and lower tempco-but rated only for −40°C to +85°C industrial range, not extended temperature. | Prefer for lab-grade instrumentation where tighter specs justify cost premium and ambient stays below 85°C. |
Compared with TL431ACDBVR and MAX6008AEUR+T, the LM4041CEM3X-1.2 uniquely combines exact 1.225 V output, extended −40°C to +125°C operation, and zero external components-making it optimal for automotive and industrial edge nodes where voltage match, temperature robustness, and layout simplicity are jointly critical.
Availability
LM4041CEM3X-1.2 is available at Aetrix Electronics and suitable for portable gas sensors, automotive cabin pressure modules, industrial data loggers, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041CEM3X-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 over 90 years of innovation in precision analog ICs.
The LM4041-N series was designed specifically for space-constrained, micropower applications demanding high accuracy and stability-targeting portable instrumentation, automotive subsystems, and industrial process monitoring where traditional references add cost and complexity.
FAQ
What is the maximum operating current for LM4041CEM3X-1.2?
The LM4041CEM3X-1.2 supports a maximum operating current of 12 mA. This upper limit ensures safe power dissipation within the SOT-23 package's 306 mW rating at 25°C ambient. Exceeding 12 mA risks thermal overload and parametric shift-designs should verify worst-case power (P = VR × IR) against derated limits at elevated temperatures. The LM4041CEM3X-1.2 datasheet specifies this as an absolute maximum rating, not a recommended operating condition.
Does LM4041CEM3X-1.2 require an external capacitor for stability?
No, the LM4041CEM3X-1.2 does not require an external output capacitor. Its internal design ensures stability with any capacitive load up to 10 nF, including parasitic PCB traces and sensor input capacitance. This eliminates BOM cost and layout area typically needed for three-terminal references. The LM4041CEM3X-1.2 achieves this via advanced bandgap compensation and low dynamic impedance (≤1.5 Ω), validated across temperature and current ranges in TI's SNOS641G datasheet.
What is the temperature range qualification for LM4041CEM3X-1.2?
The LM4041CEM3X-1.2 is qualified for extended temperature operation from −40°C to +125°C ambient, meeting AEC-Q100 Grade 1 requirements. This rating is confirmed in the "Device Information" table and electrical characteristics sections (6.7) of the SNOS641G datasheet, which explicitly lists LM4041CEM3 and LM4041QCEM3 under extended temperature specifications. The part is manufactured and tested to sustain full parametric performance-including ±0.5% initial tolerance and ≤100 ppm/°C tempco-across this full range.
How does the LM4041CEM3X-1.2 differ from the LM4041AIM3X-1.2?
The LM4041CEM3X-1.2 and LM4041AIM3X-1.2 share identical SOT-23-3 packaging and 1.225 V nominal output but differ in initial accuracy and temperature grading: LM4041AIM3X-1.2 offers ±0.1% tolerance (A grade) and is rated for −40°C to +85°C industrial range, while LM4041CEM3X-1.2 provides ±0.5% tolerance (C grade) with −40°C to +125°C extended range. The LM4041CEM3X-1.2 trades tight initial accuracy for broader thermal capability-making it preferable for under-hood automotive or industrial environments where temperature extremes dominate tolerance budget.
What is the long-term stability specification for LM4041CEM3X-1.2?
The LM4041CEM3X-1.2 exhibits 120 ppm maximum long-term stability after 1000 hours of operation at 25°C ±0.1°C with 100 μA reverse current. This parameter-defined as non-cumulative voltage drift-is measured per JEDEC JESD22-A117 and documented in Section 6.5–6.7 of the SNOS641G datasheet. It reflects predictable aging behavior suitable for applications requiring infrequent recalibration, such as field-deployed environmental sensors or medical diagnostic tools with multi-year service intervals.
LM4041CEM3X-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:
- ±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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041CEM3X-1.2 FAQ
1.How can I place an order for LM4041CEM3X-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CEM3X-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 LM4041CEM3X-1.2 reliable?
The price and inventory of LM4041CEM3X-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 LM4041CEM3X-1.2 is usually 5 days.
3.What payment methods are accepted for LM4041CEM3X-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CEM3X-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CEM3X-1.2?
LM4041CEM3X-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CEM3X-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 LM4041CEM3X-1.2?
For technical support, including LM4041CEM3X-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CEM3X-1.2 requirements.
6.How does Aetrix verify that LM4041CEM3X-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041CEM3X-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 LM4041CEM3X-1.2 meets industry standards.
7.What is the process for return or replacement of LM4041CEM3X-1.2?
All LM4041CEM3X-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CEM3X-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 LM4041CEM3X-1.2 part is unused and in its original packaging.
Return procedure for LM4041CEM3X-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041CEM3X-1.2 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
