My Inquiry
My Account
Texas Instruments LM4041DEM3-1.2
- Part No.:
- LM4041DEM3-1.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DEM3-1.2.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,200
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4041DEM3-1.2 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 ±12 mV (±0.98%) initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and stable operation from 60 μA to 12 mA load current. It serves as a compact, capacitor-free reference for ADC/DAC biasing and sensor excitation in space-constrained industrial systems.
For engineers reviewing the LM4041DEM3-1.2 datasheet, LM4041DEM3-1.2 pinout, LM4041DEM3-1.2 application, or LM4041DEM3-1.2 equivalent, key selection criteria include guaranteed operation across −40°C to +125°C extended temperature range, no-output-capacitor requirement, low 20 μVrms noise (10 Hz–10 kHz), and compatibility with capacitive loads up to 10 nF without oscillation.
Technical Context
The LM4041DEM3-1.2 uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, enabling stable 1.225 V output under varying load and temperature. Its internal dynamic impedance remains ≤1.5 Ω at 1 mA, supporting tight regulation even with fast transient currents.
Designed for direct replacement of legacy 1.2 V references, it eliminates external stabilization components while maintaining <0.08% thermal hysteresis and 120 ppm long-term stability over 1000 hours - critical for calibration-critical instrumentation and automotive control modules requiring traceable voltage accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; ±12 mV (±0.98%) tolerance at 25°C ensures accurate 12-bit ADC reference without trimming |
| Temp Coefficient | ≤100 ppm/°C max over −40°C to +125°C enables <±1.2 mV drift in automotive under-hood environments |
| Operating Current | 60 μA min to 12 mA max supports ultra-low-power sensor nodes and high-current DAC buffers |
| Noise (10 Hz–10 kHz) | 20 μVrms enables precision measurement circuits without added filtering overhead |
| Dynamic Impedance | ≤1.5 Ω at 1 mA ensures <1.5 mV load regulation error across full 60 μA–12 mA range |
| Long-Term Stability | 120 ppm over 1000 hrs guarantees minimal calibration drift in field-deployed energy meters |
| Thermal Hysteresis | 0.08% over −40°C ↔ +125°C cycling prevents repeatability errors in thermal-cycling test equipment |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body) with gull-wing leads; JEDEC MO-178AC compliant; rated for 291.9°C/W junction-to-ambient thermal resistance when board-mounted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / output node | Connects to regulated voltage rail; sinks all excess current to maintain 1.225 V at this terminal |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms the 1.225 V potential difference with cathode |
| NC (Pin 3) | No-connect terminal | 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 PCB area for decoupling caps |
| Extended temperature grade | Rated for −40°C to +125°C ambient - qualified for engine control units and industrial motor drives |
| Low quiescent current | 60 μA minimum operating current enables multi-year battery life in wireless sensor transmitters |
| Low noise performance | 20 μVrms wideband noise avoids signal degradation in high-resolution data acquisition front-ends |
| Capacitive load tolerance | Immune to oscillation with >1 nF load capacitance - simplifies layout for noisy switching power supply rails |
Applications
| Portable Medical Sensors | Automotive Engine Control |
|---|---|
Use Scenario: Battery-powered glucose meter with 16-bit sigma-delta ADC measuring electrochemical current. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for ADC conversion, directly replacing bulkier 3-terminal references. Use Value: Enables 0.01% full-scale accuracy over temperature without calibration, extending device shelf life and reducing test time. | Use Scenario: Throttle position sensor signal conditioning in ECU under hood (−40°C to +125°C). IC Role / Device Role / Timing Role: Supplies excitation voltage to potentiometric sensor and reference for analog front-end ADC. Use Value: Maintains <±1.5 mV output shift across full automotive temperature range, eliminating software compensation routines. |
| Industrial Process Transmitters | Smart Energy Meters |
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART modulation. IC Role / Device Role / Timing Role: Precision shunt reference for current-loop DAC and sensor bridge excitation. Use Value: 120 ppm long-term stability meets IEC 61000-4-30 Class A requirements for 10-year metrology-grade accuracy. | Use Scenario: Polyphase electricity meter with isolated ADCs measuring voltage/current waveforms. IC Role / Device Role / Timing Role: Primary reference for metrology ADCs and secondary reference for auxiliary monitoring circuits. Use Value: Low 20 μVrms noise prevents harmonic distortion in 0.1% accuracy active energy measurement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040DEM3-1.2 | Same 1.225 V output and SOT-23-3 package, but higher 150 ppm/°C tempco and ±20 mV initial tolerance | Lower accuracy makes it suitable only for non-critical biasing, not metrology-grade sensing | Select LM4041DEM3-1.2 when <100 ppm/°C tempco and <±12 mV tolerance are mandatory |
| MAX6002EUR+T | 1.25 V output, ±0.2% initial accuracy, 75 ppm/°C tempco, but requires ≥100 μA operating current | Higher minimum current limits use in sub-100 μA ultra-low-power designs like NB-IoT sensors | Choose MAX6002EUR+T only if 1.25 V output aligns with system gain structure and higher current budget exists |
Compared with LM4040DEM3-1.2 and MAX6002EUR+T, the LM4041DEM3-1.2 uniquely delivers 1.225 V at ±12 mV tolerance with 60 μA minimum current and 100 ppm/°C tempco in the same SOT-23 footprint - making it the only option meeting automotive-grade accuracy and micropower constraints simultaneously.
Availability
LM4041DEM3-1.2 is available at Aetrix Electronics and suitable for industrial process transmitters, automotive engine control units, and portable medical sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041DEM3-1.2 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 family was designed specifically for space-constrained, high-accuracy applications demanding micropower operation and extended temperature reliability - targeting industrial automation, automotive subsystems, and portable instrumentation.
FAQ
What is the maximum operating temperature range for the LM4041DEM3-1.2?
The LM4041DEM3-1.2 is rated for operation from −40°C to +125°C ambient temperature, qualifying it for extended temperature applications including automotive engine control and industrial motor drives. This range is explicitly defined in the "Recommended Operating Conditions" section of the SNOS641G datasheet, and the device carries TI's Grade E qualification for this extended range.
Does the LM4041DEM3-1.2 require an external output capacitor?
No, the LM4041DEM3-1.2 does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including values up to 10 nF, eliminating the need for external stabilization components. This capability is confirmed in the "Features" and "Description" sections of the official TI datasheet SNOS641G.
What is the initial output voltage tolerance of the LM4041DEM3-1.2 at 25°C?
The LM4041DEM3-1.2 has an initial reverse breakdown voltage tolerance of ±12 mV (±0.98%) at 25°C, corresponding to its Grade E specification. This value is specified in Table 6.7 ("LM4041-N-xx 1.2 Electrical Characteristics – Extended Temperature Range") of the SNOS641G datasheet under "Reverse breakdown voltage error" for part numbers LM4041DEM3 and LM4041QDEM3.
Can the LM4041DEM3-1.2 drive a 10 nF capacitive load without oscillation?
Yes, the LM4041DEM3-1.2 is explicitly characterized to tolerate capacitive loads up to 10 nF without oscillation or instability. The datasheet states "Tolerates Capacitive Loads" as a key feature and confirms stable operation across the full 60 μA to 12 mA current range with such loads - a critical advantage over older shunt references requiring series resistance or external compensation.
What is the typical wideband noise performance of the LM4041DEM3-1.2?
The LM4041DEM3-1.2 delivers 20 μVrms wideband noise over the 10 Hz to 10 kHz frequency range, as specified in the "Electrical Characteristics" tables (Sections 6.5–6.7) of the SNOS641G datasheet. This low-noise performance supports high-resolution data acquisition systems where reference noise directly impacts effective number of bits (ENOB).
LM4041DEM3-1.2 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:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041DEM3-1.2 FAQ
1.How can I place an order for LM4041DEM3-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DEM3-1.2 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 LM4041DEM3-1.2 reliable?
The price and inventory of LM4041DEM3-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DEM3-1.2 is usually 5 days.
3.What payment methods are accepted for LM4041DEM3-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DEM3-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DEM3-1.2?
LM4041DEM3-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DEM3-1.2 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 LM4041DEM3-1.2?
For technical support, including LM4041DEM3-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DEM3-1.2 requirements.
6.How does Aetrix verify that LM4041DEM3-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041DEM3-1.2 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 LM4041DEM3-1.2 meets industry standards.
7.What is the process for return or replacement of LM4041DEM3-1.2?
All LM4041DEM3-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DEM3-1.2, 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 LM4041DEM3-1.2 part is unused and in its original packaging.
Return procedure for LM4041DEM3-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041DEM3-1.2 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…
