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Texas Instruments LM4041CEM3X-ADJ
- Part No.:
- LM4041CEM3X-ADJ
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CEM3X-ADJ.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,180
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Product details
Overview
LM4041CEM3X-ADJ from Texas Instruments is a precision adjustable shunt voltage reference in SOT-23 package, delivering 1.233 V nominal reference voltage with ±0.5% initial tolerance at 25°C, 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 supports output voltages from 1.24 V to 10 V in battery-powered instrumentation and automotive sensor signal conditioning.
For engineers reviewing the LM4041CEM3X-ADJ datasheet, LM4041CEM3X-ADJ pinout, LM4041CEM3X-ADJ application, or LM4041CEM3X-ADJ equivalent, key selection criteria include extended-temperature-grade shunt reference stability, feedback-pin current (≤100 nA), reverse dynamic impedance (≤0.3 Ω at 1 mA), no-output-capacitor operation, and compatibility with capacitive loads in space-constrained analog front-ends.
Technical Context
The LM4041CEM3X-ADJ uses a bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its three-terminal configuration (Anode, Cathode, FB) enables programmable output via external resistor divider while maintaining low dynamic impedance across 60 μA–12 mA operating current.
It achieves stable regulation without output capacitance due to inherent phase margin design and tolerates arbitrary capacitive loading-critical for ADC reference buffers and isolated power supply feedback loops where layout-induced parasitics are unavoidable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.233 V nominal at 100 μA, enabling precise 5 V or 3.3 V system references via resistor scaling |
| Initial Tolerance | ±6.2 mV (±0.5%) at 25°C - ensures <±0.75% total error over −40°C to +125°C when combined with 100 ppm/°C TC |
| Temp Coefficient | ≤100 ppm/°C max - limits drift to ±12.4 mV over full industrial range, critical for metering accuracy |
| Operating Current | 60 μA min / 12 mA max - supports ultra-low-power sensor nodes and high-current DAC references |
| Noise (10 Hz–10 kHz) | 20 μVRMS - avoids quantization noise floor degradation in 16-bit+ data acquisition systems |
| Dynamic Impedance | 0.3 Ω typical at 1 mA - maintains regulation stability under fast load transients in closed-loop supplies |
| Feedback Current | ≤100 nA - minimizes divider resistor error and power loss in high-impedance setpoint networks |
Pinout & Package
SOT-23 (DBZ) package: 1.30 mm × 2.92 mm body, 3-pin surface-mount, JEDEC MO-178AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 3) | Ground reference node | Internally connected to substrate; must be tied to system ground for proper bias and thermal stability |
| Cathode (Pin 2) | Shunt current sink & output node | Carries all load and reference current; connects to regulated output rail or feedback point of error amplifier |
| FB (Pin 1) | Reference input | High-impedance (≤100 nA) feedback terminal; sets output voltage via external resistive divider (VOUT = VREF × (1 + R1/R2)) |
Key Features
| Feature | Design Value |
|---|---|
| No-output-capacitor operation | Eliminates BOM cost and board area for stabilization caps; simplifies layout in compact PCBs |
| Capacitive load tolerance | Stable with any value of output capacitance - enables direct connection to ADC reference inputs or LDO bypass caps |
| Extended temperature grade | Rated for −40°C to +125°C ambient - qualified for engine control units and industrial motor drives |
| AEC-Q100 Grade 1 compliance | Validated for automotive applications per AEC-Q100 Rev H - supports functional safety requirements in ASIL-B systems |
| Low quiescent current | 60 μA minimum operating current - extends battery life in portable gas detectors and wireless sensors |
Applications
| Battery-Powered Instrumentation | Data-Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter measuring DC voltage with 0.1% accuracy over 0–50°C ambient. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V reference to 16-bit SAR ADC and op-amp buffer. Use Value: 100 ppm/°C TC and 20 μVRMS noise ensure measurement repeatability without calibration drift or added filtering. | Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Precision reference for 24-bit delta-sigma ADC and isolation amplifier feedback path. Use Value: Adjustable output (1.24–10 V) allows matching of ADC full-scale range; 60 μA min current enables low-power standby modes. |
| Automotive Sensor Signal Conditioning | Energy Metering |
Use Scenario: Exhaust gas temperature sensor interface in diesel aftertreatment control unit. IC Role / Device Role / Timing Role: Reference for ratiometric RTD-to-digital conversion circuit operating at 125°C junction temperature. Use Value: AEC-Q100 Grade 1 qualification and −40°C to +125°C operation guarantee reliability under hood thermal stress. | Use Scenario: Revenue-grade electricity meter requiring ±0.1% energy accuracy over 20-year lifetime. IC Role / Device Role / Timing Role: Stable reference for metrology ADC and anti-tampering voltage monitoring circuit. Use Value: 120 ppm long-term stability (1000 hrs) and 0.08% thermal hysteresis minimize calibration drift between field deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBVR | Fixed 2.495 V reference; higher 2.5 mA min cathode current; 500 mV reference tolerance (±2%); no adjustable version | Not suitable for sub-2.5 V or programmable references; requires external resistor network for adjustment | Select when cost sensitivity outweighs precision needs and fixed 2.5 V output suffices |
| MAX6008AEUR+T | Fixed 1.25 V output; SC70-3 package; 30 ppm/°C TC; 15 μVRMS noise; 50 μA min current | Lacks adjustability and automotive qualification; limited to industrial temp range (−40°C to +85°C) | Prefer for ultra-low-noise, fixed-voltage applications where AEC-Q100 is not required |
Compared with TL431CDBVR and MAX6008AEUR+T, the LM4041CEM3X-ADJ uniquely combines adjustable output (1.24–10 V), AEC-Q100 Grade 1 qualification, and 60 μA minimum current - making it the only option for automotive-grade programmable references in thermally demanding, space-constrained designs.
Availability
LM4041CEM3X-ADJ is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor interfaces, and energy metering applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4041CEM3X-ADJ 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 developed to deliver micro-power, high-accuracy shunt references for space-constrained, thermally aggressive applications including automotive ECUs, portable test equipment, and smart grid infrastructure.
FAQ
What is the maximum output voltage supported by the LM4041CEM3X-ADJ?
The LM4041CEM3X-ADJ supports an output voltage range of 1.24 V to 10 V, set by an external resistor divider connected to its FB pin. This range is validated across the full −40°C to +125°C operating temperature and 60 μA–12 mA cathode current range, with specified performance in the Electrical Characteristics tables for both industrial and extended temperature grades.
Does the LM4041CEM3X-ADJ require an external output capacitor for stability?
No, the LM4041CEM3X-ADJ does not require an external output capacitor. Its internal design provides inherent stability across all operating conditions and tolerates arbitrary capacitive loads - a key advantage over older shunt references like the TL431. This eliminates capacitor-related BOM cost, footprint, and potential instability risks in high-frequency or high-EMI environments.
What is the feedback pin (FB) input current specification for the LM4041CEM3X-ADJ?
The FB pin input current for the LM4041CEM3X-ADJ is ≤100 nA at 25°C and ≤120 nA over −40°C to +125°C. This ultra-low current minimizes error in resistor-divider networks and enables use of high-value resistors (e.g., 1 MΩ + 1 MΩ) without significant voltage drop or power loss - critical for battery-operated systems and high-impedance sensor interfaces.
Is the LM4041CEM3X-ADJ qualified for automotive applications?
Yes, the LM4041CEM3X-ADJ is AEC-Q100 Grade 1 qualified, rated for −40°C to +125°C ambient operation and validated per the AEC-Q100 standard for automotive electronics. It is explicitly listed in TI's LM4041-N-Q1 family documentation as meeting Grade 1 requirements, making it suitable for engine control, transmission, and ADAS subsystems.
How does the LM4041CEM3X-ADJ achieve low temperature coefficient?
The LM4041CEM3X-ADJ achieves ≤100 ppm/°C temperature coefficient through bandgap reference architecture with curvature-corrected temperature drift compensation. This design actively counteracts the parabolic error profile of silicon bandgaps, ensuring linearized output voltage vs. temperature behavior - verified in TI's Typical Characteristics curves and guaranteed across the extended temperature range.
LM4041CEM3X-ADJ 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:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.233V
- Voltage - Output (Max):
- 10 V
- 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-ADJ FAQ
1.How can I place an order for LM4041CEM3X-ADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CEM3X-ADJ 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-ADJ reliable?
The price and inventory of LM4041CEM3X-ADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CEM3X-ADJ is usually 5 days.
3.What payment methods are accepted for LM4041CEM3X-ADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CEM3X-ADJ transactions.
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4.How is shipping managed for LM4041CEM3X-ADJ?
LM4041CEM3X-ADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CEM3X-ADJ 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-ADJ?
For technical support, including LM4041CEM3X-ADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CEM3X-ADJ requirements.
6.How does Aetrix verify that LM4041CEM3X-ADJ is sourced from the original manufacturer or authorized distributors?
All LM4041CEM3X-ADJ 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-ADJ meets industry standards.
7.What is the process for return or replacement of LM4041CEM3X-ADJ?
All LM4041CEM3X-ADJ units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CEM3X-ADJ, 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-ADJ part is unused and in its original packaging.
Return procedure for LM4041CEM3X-ADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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