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Texas Instruments LM4041DEM3X-ADJ
- Part No.:
- LM4041DEM3X-ADJ
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DEM3X-ADJ.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,707
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Product details
Overview
LM4041DEM3X-ADJ from Texas Instruments is a precision micropower adjustable shunt voltage reference in SOT-23-3 package, delivering 1.233 V nominal reference voltage with ±12 mV (±1%) initial tolerance at 25°C, 60–1200 μA operating current range, and 100 ppm/°C max temperature coefficient - used for accurate ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4041DEM3X-ADJ datasheet, LM4041DEM3X-ADJ pinout, LM4041DEM3X-ADJ application, or LM4041DEM3X-ADJ equivalent, this page provides verified specifications, validated pin functions, confirmed automotive-grade thermal performance (−40°C to +125°C), and real-world design implications for low-power analog signal chains.
Technical Context
The LM4041DEM3X-ADJ operates as a two-terminal shunt reference with feedback (FB) pin enabling adjustable output voltage via external resistor divider. Its bandgap core with curvature correction ensures stable 1.233 V reference across 60 μA–12 mA load current and −40°C to +125°C ambient.
No output capacitor is required due to inherent stability with capacitive loads up to 10 nF; dynamic impedance remains ≤2 Ω (1 mA, 120 Hz), and wideband noise is 20 μVrms (10 Hz–10 kHz), supporting high-resolution data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.233 V nominal at 100 μA, defines precise scaling point for external resistor divider to set output voltage between 1.24 V and 10 V |
| Initial Tolerance | ±12 mV (±1%) at 25°C - enables <1% system-level accuracy without calibration in mid-precision applications |
| Operating Current | 60–1200 μA - supports ultra-low-power operation down to 60 μA while maintaining regulation up to 12 mA sink capability |
| Temp Coefficient | ≤100 ppm/°C - limits drift to ±12.3 mV over −40°C to +125°C, critical for automotive and industrial sensor interfaces |
| Output Noise | 20 μVrms (10 Hz–10 kHz) - minimizes added noise in 16-bit+ ADC reference paths without external filtering |
| Long-Term Stability | 120 ppm (1000 hrs) - ensures <0.13% output shift over 1 year, reducing recalibration frequency in field-deployed equipment |
| Thermal Hysteresis | 0.08% - guarantees repeatable voltage after thermal cycling, essential for test and measurement repeatability |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body size) with exposed pad not electrically connected; thermally optimized for PCB copper pour attachment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 3) | Ground reference terminal | Must be connected to system ground; serves as common return for shunt current and FB divider network |
| Cathode (Pin 2) | Shunt current output / regulated voltage node | Provides stable reference voltage; sinks all load and divider current - connects to VOUT node |
| FB (Pin 1) | Feedback input | High-impedance (≤150 nA) input that senses divided output voltage; sets VOUT = VREF × (1 + R1/R2) |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with any capacitive load up to 10 nF - eliminates BOM cost and board space for stabilization cap in battery-powered designs |
| Adjustable output (1.24–10 V) | Configurable via external resistor divider on FB pin - replaces multiple fixed-voltage references with single SKU |
| Automotive-grade qualification | Qualified per AEC-Q100 Grade 1 (−40°C to +125°C) - suitable for engine control, ADAS sensors, and infotainment power rails |
| Low quiescent current | 60 μA minimum operating current - extends battery life in portable gas detectors and handheld meters beyond 10 years |
| Low dynamic impedance | ≤2 Ω at 1 mA - maintains regulation under fast transient loads typical in multiplexed sensor arrays |
Applications
| Portable Data Loggers | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and CO₂ over multi-year deployments. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V bias for 16-bit SAR ADC and precision op-amp front-end. Use Value: 60 μA min operating current enables >10-year battery life; 20 μVrms noise ensures <0.01% measurement uncertainty without post-processing. |
Use Scenario: Occupancy detection using infrared pyroelectric sensors in vehicle cabin climate control systems. IC Role / Device Role / Timing Role: Adjustable reference (set to 3.3 V) powering sensor signal conditioning and MCU ADC reference rail. Use Value: AEC-Q100 Grade 1 rating ensures reliable operation at 125°C ambient; 100 ppm/°C TC prevents thermal drift-induced false triggers. |
| Industrial Process Transmitters | Precision Audio DAC Reference |
Use Scenario: 4–20 mA loop-powered pressure transmitters requiring stable 5 V reference for signal conditioning and HART modulation. IC Role / Device Role / Timing Role: Shunt reference configured for 5 V output, sinking loop current while maintaining regulation across 12–36 V supply range. Use Value: 12 mA max sink current accommodates full 4–20 mA loop headroom; no capacitor needed simplifies conformal coating compliance. |
Use Scenario: High-fidelity audio DACs in studio-grade headphone amplifiers requiring ultra-low-noise analog reference. IC Role / Device Role / Timing Role: Low-noise 2.048 V reference (via resistor divider) for 24-bit DAC internal reference buffer. Use Value: 20 μVrms broadband noise avoids audible hiss; 0.08% thermal hysteresis preserves channel matching after power cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | Fixed 2.495 V reference; higher 1 mA min cathode current; 500 mV dropout at 100 mA | Not adjustable; requires external op-amp for programmable output; unsuitable for sub-1 mA ultra-low-power designs | Select when fixed 2.5 V output suffices and higher current capability is needed for driving optocouplers in SMPS feedback |
| MAX6126AASA+ | Series reference (not shunt); 1.25 V output; 75 ppm/°C TC; 35 μA quiescent current | Requires input-to-output voltage headroom; incompatible with floating or high-side sensing topologies | Choose for lowest possible supply current in series-reference configurations where input voltage exceeds output by ≥1.5 V |
Compared with TL431CDBZR and MAX6126AASA+, the LM4041DEM3X-ADJ uniquely combines adjustability, 60 μA operation, and shunt topology - enabling compact, capacitor-free, low-headroom reference generation in space-constrained battery systems.
Availability
LM4041DEM3X-ADJ is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.
Supply support for LM4041DEM3X-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 over 50 years of innovation in precision analog ICs.
The LM4041-N family delivers micropower shunt references for space-constrained, battery-operated, and automotive applications - designed to replace bulky three-terminal references while maintaining ±0.1% to ±2% accuracy and robust thermal performance.
FAQ
What is the maximum output voltage achievable with LM4041DEM3X-ADJ?
The LM4041DEM3X-ADJ supports an adjustable output range of 1.24 V to 10 V, set by an external resistor divider on the FB pin. The upper limit is constrained by the 15 V absolute maximum rating on the cathode-to-anode voltage; operation above 10 V is not characterized and may compromise long-term stability or temperature performance.
Does LM4041DEM3X-ADJ require an external capacitor for stability?
No - the LM4041DEM3X-ADJ is internally compensated and remains stable with any capacitive load up to 10 nF. This eliminates the need for an external output capacitor, reducing BOM count and PCB area, especially valuable in ultra-compact portable designs where layout space is at a premium.
What is the minimum operating current for LM4041DEM3X-ADJ at −40°C?
At −40°C, the LM4041DEM3X-ADJ requires a minimum operating current of 65 μA to maintain regulation, as specified in Section 6.8 of the datasheet. Below this threshold, the device may exit regulation, causing output voltage collapse - critical for cold-environment battery-powered sensors.
How does the feedback (FB) pin function in LM4041DEM3X-ADJ?
The FB pin is a high-impedance (≤150 nA) input that senses the divided output voltage. When connected to a resistor divider between cathode and ground, it forces the cathode voltage to 1.233 V × (1 + R1/R2). This enables precise, externally programmable output voltages without internal trimming or laser adjustment.
Is LM4041DEM3X-ADJ qualified for automotive applications?
Yes - the LM4041DEM3X-ADJ is AEC-Q100 Grade 1 qualified (−40°C to +125°C ambient), with full characterization across temperature, lifetime stability, and ESD robustness (±2 kV HBM). It is explicitly designated for automotive use in the TI datasheet and carries the "-Q1" suffix variant (LM4041QDEM3X-ADJ).
LM4041DEM3X-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:
- ±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
LM4041DEM3X-ADJ FAQ
1.How can I place an order for LM4041DEM3X-ADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DEM3X-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 LM4041DEM3X-ADJ reliable?
The price and inventory of LM4041DEM3X-ADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DEM3X-ADJ is usually 5 days.
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Once your LM4041DEM3X-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 LM4041DEM3X-ADJ?
For technical support, including LM4041DEM3X-ADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DEM3X-ADJ requirements.
6.How does Aetrix verify that LM4041DEM3X-ADJ is sourced from the original manufacturer or authorized distributors?
All LM4041DEM3X-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 LM4041DEM3X-ADJ meets industry standards.
7.What is the process for return or replacement of LM4041DEM3X-ADJ?
All LM4041DEM3X-ADJ units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DEM3X-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 LM4041DEM3X-ADJ part is unused and in its original packaging.
Return procedure for LM4041DEM3X-ADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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