My Inquiry
My Account
Texas Instruments LM4041CEM3-1.2
- Part No.:
- LM4041CEM3-1.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CEM3-1.2.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,349
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4041CEM3-1.2 from Texas Instruments is a precision 1.225 V shunt voltage reference in SOT-23 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 low-power analog signal chains for battery-powered instrumentation.
For engineers reviewing the LM4041CEM3-1.2 datasheet, LM4041CEM3-1.2 pinout, LM4041CEM3-1.2 application, or LM4041CEM3-1.2 equivalent, key selection criteria include reverse breakdown voltage accuracy over temperature, minimum operating current (60 μA), dynamic impedance (≤1.5 Ω), capacitive load stability, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4041CEM3-1.2 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 design eliminates need for output capacitance while maintaining stability with any capacitive load up to 10 nF.
It operates as a two-terminal device: cathode sinks current to establish precise 1.225 V across external load/resistor, with anode tied to system ground. The SOT-23 package supports surface-mount assembly in space-constrained PCB layouts typical of portable and automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal reverse breakdown voltage - sets exact reference point for ADCs, DACs, and comparators |
| Initial Tolerance | ±6 mV (±0.5%) at 25°C - enables high-accuracy calibration without post-production trimming |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +125°C - ensures ≤±12.4 mV total drift across full operating range |
| Min Operating Current | 60 μA - supports ultra-low-power systems such as coin-cell IoT sensors and energy-harvesting nodes |
| Noise (10 Hz–10 kHz) | 20 μVRMS - minimizes added uncertainty in 16-bit+ data acquisition systems |
| Dynamic Impedance | ≤1.5 Ω at 1 mA - maintains voltage regulation under varying load currents and supply ripple |
| Long-Term Stability | 120 ppm after 1000 hrs - predicts <0.012% output shift over first year in field-deployed equipment |
Pinout & Package
SOT-23 (DBZ) 3-pin surface-mount package: 1.30 mm × 2.92 mm body size, JEDEC MO-178AA compliant, with gull-wing leads for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current sink and output node - connects to load resistor and feedback point of regulator or op-amp |
| Anode (Pin 2) | O | Ground reference terminal - must be connected to system ground plane for accurate voltage regulation |
| NC (Pin 3) | - | No-connect - must float or tie to anode per TI layout guidance to suppress EMI coupling |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables single-component reference placement in tight layouts without stability-compromising bypass caps |
| Tolerates capacitive loads | Stable with ≥10 nF load capacitance - simplifies filtering in noisy environments without phase-margin analysis |
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C ambient operation - suitable for engine control units and ADAS sensor modules |
| Low 20 μVRMS noise | Preserves SNR in precision 16-bit SAR ADC front-ends without requiring additional low-noise LDO filtering |
| 60 μA min operating current | Supports microamp-level bias networks in always-on monitoring circuits without sacrificing accuracy |
Applications
| Battery-Powered Instrumentation | Data-Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter measuring DC voltage with 0.1% accuracy requirement and 10-year calibration interval. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V for 24-bit sigma-delta ADC reference input. Use Value: ±0.5% initial tolerance and 100 ppm/°C TC ensure measurement error remains within spec across temperature cycling and aging. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals with 16-bit resolution. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifier and successive-approximation ADC. Use Value: 20 μVRMS noise and ≤1.5 Ω dynamic impedance prevent reference-induced quantization noise and load-regulation errors. |
| Automotive Sensor Conditioning | Energy Metering |
Use Scenario: Tire pressure monitoring system (TPMS) ECU operating at −40°C to +125°C with 10-year lifetime. IC Role / Device Role / Timing Role: Voltage reference for MCU internal ADC sampling piezoresistive pressure transducer output. Use Value: AEC-Q100 Grade 1 qualification and 120 ppm long-term stability guarantee consistent readings over vehicle lifetime. |
Use Scenario: Smart electricity meter requiring metrology-grade accuracy per IEC 62053-21 Class 0.5S. IC Role / Device Role / Timing Role: Reference source for isolated delta-sigma ADC measuring mains voltage and current waveforms. Use Value: Low thermal hysteresis (0.08%) prevents offset shifts during daily temperature cycles, preserving billing accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4051C12IDBZR | 1.2 V output, ±0.5% tolerance, SOT-23, but only rated for −40°C to +85°C industrial range | Lacks AEC-Q100 qualification and extended temperature support - unsuitable for under-hood automotive use | Select when cost sensitivity outweighs extended temp or automotive compliance requirements |
| MAX6008AEUR+T | 1.25 V output, ±0.2% initial accuracy, SC70-5 package, 75 ppm/°C TC, 25 μVRMS noise | Higher accuracy but larger package and higher noise - requires board redesign and adds filtering complexity | Choose only if tighter initial tolerance justifies SC70 footprint change and added noise mitigation effort |
Compared with TL4051C12IDBZR and MAX6008AEUR+T, the LM4041CEM3-1.2 uniquely combines AEC-Q100 Grade 1 qualification, SOT-23 compactness, and guaranteed 100 ppm/°C TC over −40°C to +125°C - making it the only drop-in solution for automotive and harsh-environment industrial designs needing 1.225 V.
Availability
LM4041CEM3-1.2 is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor conditioning, and energy metering requiring stable component supply with full traceability and long-lifecycle support.
Supply support for LM4041CEM3-1.2 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-grade qualification.
The LM4041-N series was developed to deliver high-accuracy, low-power shunt references for space-constrained, mission-critical applications including automotive electronics, portable test equipment, and industrial process control.
FAQ
What is the maximum operating current for LM4041CEM3-1.2?
The LM4041CEM3-1.2 supports a maximum operating current of 12 mA, enabling use in higher-load applications such as driving multiple op-amp bias networks or powering small logic interfaces while maintaining regulation within specified voltage tolerance and thermal limits.
Does LM4041CEM3-1.2 require an external capacitor for stability?
No, the LM4041CEM3-1.2 does not require an external output capacitor due to its internally compensated shunt architecture. It remains stable with any capacitive load up to at least 10 nF, simplifying layout and reducing BOM count in compact designs.
Is LM4041CEM3-1.2 qualified for automotive applications?
Yes, the LM4041CEM3-1.2 is AEC-Q100 qualified as Grade 1 (−40°C to +125°C ambient), meeting stringent reliability and environmental stress requirements for automotive powertrain, chassis, and ADAS subsystems.
What is the thermal hysteresis specification for LM4041CEM3-1.2?
The LM4041CEM3-1.2 exhibits 0.08% thermal hysteresis - defined as the voltage difference measured at +25°C after cycling to −40°C versus after cycling to +125°C - ensuring repeatable reference performance across repeated thermal excursions in field operation.
Can LM4041CEM3-1.2 be used in adjustable-output configurations?
No, the LM4041CEM3-1.2 is a fixed 1.225 V shunt reference. Adjustable versions (e.g., LM4041CEM3-ADJ) use a separate FB pin and different internal topology; the LM4041CEM3-1.2 has no feedback terminal and must be used in standard two-terminal shunt configuration.
LM4041CEM3-1.2 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
LM4041CEM3-1.2 FAQ
1.How can I place an order for LM4041CEM3-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CEM3-1.2 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 LM4041CEM3-1.2 reliable?
The price and inventory of LM4041CEM3-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CEM3-1.2 is usually 5 days.
3.What payment methods are accepted for LM4041CEM3-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CEM3-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CEM3-1.2?
LM4041CEM3-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CEM3-1.2 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 LM4041CEM3-1.2?
For technical support, including LM4041CEM3-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CEM3-1.2 requirements.
6.How does Aetrix verify that LM4041CEM3-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041CEM3-1.2 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 LM4041CEM3-1.2 meets industry standards.
7.What is the process for return or replacement of LM4041CEM3-1.2?
All LM4041CEM3-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CEM3-1.2, 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 LM4041CEM3-1.2 part is unused and in its original packaging.
Return procedure for LM4041CEM3-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041CEM3-1.2 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…
