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Texas Instruments LM4041CIM3X-ADJ
- Part No.:
- LM4041CIM3X-ADJ
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CIM3X-ADJ.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,677
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Product details
Overview
LM4041CIM3X-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 ±0.5% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and stable operation from 60 μA to 12 mA load current - used for accurate ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4041CIM3X-ADJ datasheet, LM4041CIM3X-ADJ pinout, LM4041CIM3X-ADJ application, or LM4041CIM3X-ADJ equivalent, key selection criteria include output adjustability (1.24–10 V), no-output-capacitor requirement, low 20 μVrms noise (10 Hz–10 kHz), thermal hysteresis of 0.08%, and extended temperature range support (−40°C to +125°C).
Technical Context
The LM4041CIM3X-ADJ uses a bandgap-based shunt architecture with curvature-corrected temperature drift compensation and Zener-zap trimming at wafer sort to achieve ±0.5% initial accuracy. Its feedback (FB) pin enables external resistor-divider configuration for programmable output voltage.
It operates without an output capacitor and remains stable under any capacitive load, eliminating layout sensitivity. The device maintains low dynamic impedance (≤2 Ω typical) across its full 60 μA–12 mA operating current range and exhibits minimal load regulation error (≤2.5 mV over 1 mA–12 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.233 V nominal at 100 μA, adjustable from 1.24 V to 10 V via external resistors |
| Initial Tolerance | ±0.5% at 25°C - ensures ≤6.2 mV absolute error at 5 V output |
| Temp Coefficient | Max 100 ppm/°C - contributes ≤±12.5 mV drift over −40°C to +125°C at 5 V |
| 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 - preserves signal integrity in 16-bit+ data acquisition systems |
| Long-Term Stability | 120 ppm over 1000 hrs - enables calibration retention in field-deployed equipment |
| Thermal Hysteresis | 0.08% - limits repeatability error after thermal cycling in automotive ECUs |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body size), surface-mount, JEDEC-compliant footprint with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 3) | Ground reference node | Internally connected to substrate; must be tied to system ground for proper shunt regulation |
| Cathode (Pin 2) | Shunt current sink & output node | Carries total load current plus reference current; connects to regulated output rail |
| FB (Pin 1) | Feedback input | High-impedance (≤150 nA) node that sets output voltage via external resistor divider (VOUT = VREF × (1 + R1/R2)) |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output voltage | 1.24 V to 10 V using two external resistors - eliminates need for multiple fixed-reference SKUs |
| No output capacitor required | Stable with any capacitive load - simplifies PCB layout and reduces BOM count in space-constrained designs |
| Low quiescent current | 60 μA minimum operating current - extends battery life in portable gas sensors and handheld meters |
| Extended temperature range | Rated for −40°C to +125°C ambient - qualified for under-hood automotive and industrial control applications |
| Low thermal hysteresis | 0.08% voltage shift after −40°C/+125°C cycling - ensures repeatable calibration in thermal-cycling environments |
Applications
| Portable Data Loggers | Automotive Battery Monitoring |
|---|---|
Use Scenario: Continuous voltage logging of Li-ion cell stacks in wireless environmental monitors. IC Role / Device Role / Timing Role: Shunt reference for 16-bit SAR ADC input scaling and precision voltage divider biasing. Use Value: 20 μVrms noise and 100 ppm/°C TC ensure <±1 LSB error over full temperature range and battery discharge cycle. | Use Scenario: Real-time monitoring of 12 V lead-acid and 48 V mild-hybrid battery voltages in engine control units. IC Role / Device Role / Timing Role: Adjustable shunt reference setting threshold comparators and ADC reference for battery state-of-charge calculation. Use Value: −40°C to +125°C rating and 0.08% thermal hysteresis enable reliable operation across engine bay thermal transients. |
| Industrial Process Transmitters | Precision Audio Level Detection |
Use Scenario: 4–20 mA loop-powered pressure and temperature transmitters with HART modulation. IC Role / Device Role / Timing Role: Stable 2.5 V reference for DAC-driven current loop control and sensor bridge excitation. Use Value: 60 μA min current allows operation below 3.3 V supply while maintaining ±0.5% accuracy - critical for low-voltage loop compliance. | Use Scenario: RMS-level detection and gain control in studio-grade microphone preamplifiers. IC Role / Device Role / Timing Role: Low-noise reference for envelope detector and analog multiplier circuits in audio signal path. Use Value: 20 μVrms broadband noise prevents audible hiss injection into sensitive analog audio stages. |
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 70 μA min current; 2% initial tolerance; no adjustable mode | Requires external op-amp for adjustable output; unsuitable for sub-2.4 V references | Select when cost-sensitive, fixed-voltage, high-current (>1 mA) applications dominate and adjustability is unnecessary |
| MAX6126AASA+ | Series topology; 1.25 V fixed output; 0.04% initial accuracy; 3 ppm/°C TC; requires input capacitor | Higher PSRR and lower noise (1.6 μVrms); not shunt-based - cannot sink current or operate as floating reference | Select when ultra-low drift and series-regulator robustness are prioritized over shunt flexibility and capacitor-free design |
Compared with TL431CDBZR and MAX6126AASA+, the LM4041CIM3X-ADJ uniquely combines true adjustability (1.24–10 V), capacitor-free stability, micropower operation (60 μA), and automotive-grade temperature range - making it optimal for compact, battery-aware, and thermally demanding shunt reference roles.
Availability
LM4041CIM3X-ADJ is available at Aetrix Electronics and suitable for portable instrumentation, automotive battery management, industrial process transmitters, and precision audio level detection requiring stable component supply across extended temperature ranges.
Supply support for LM4041CIM3X-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 leadership in precision reference design.
The LM4041-N family was engineered for space-constrained, micropower applications needing high initial accuracy and low temperature drift - targeting portable, automotive, and industrial systems where board area and power budget are critical constraints.
FAQ
What is the maximum output voltage achievable with LM4041CIM3X-ADJ?
The LM4041CIM3X-ADJ supports an adjustable output voltage range from 1.24 V to 10 V, set by an external resistor divider on the FB pin. This upper limit is defined by the absolute maximum rating of 15 V on the cathode pin, but operational reliability and specified performance are guaranteed only up to 10 V per the Electrical Characteristics table for the ADJ variant.
Does LM4041CIM3X-ADJ require an output capacitor for stability?
No, the LM4041CIM3X-ADJ does not require an output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to large bulk capacitors or long PCB traces - a key advantage over many competing shunt references and essential for minimizing component count in compact layouts.
What is the minimum operating current for LM4041CIM3X-ADJ at −40°C?
At −40°C, the LM4041CIM3X-ADJ requires a minimum operating current of 65 μA to maintain regulation and specified accuracy. This value is confirmed in Section 6.8 of the datasheet under "Minimum operating current" for the C-grade ADJ variant across the industrial temperature range (−40°C to +85°C).
How does the feedback pin (FB) of LM4041CIM3X-ADJ function in circuit design?
The FB pin of LM4041CIM3X-ADJ is a high-impedance input (≤150 nA) that senses the divided output voltage. It enables precise adjustment via two external resistors: VOUT = VREF × (1 + R1/R2), where R1 connects between cathode and FB, and R2 connects between FB and ground. This configuration decouples reference accuracy from resistor tolerance effects.
Is LM4041CIM3X-ADJ qualified for automotive applications?
Yes, the LM4041CIM3X-ADJ is part of the LM4041-N-Q1 family and is AEC-Q100 Grade 1 qualified (−40°C to +125°C ambient), with documented test results for device temperature grade, ESD robustness (±2 kV HBM), and reliability - making it suitable for non-safety-critical automotive subsystems such as body control modules and battery monitoring units.
LM4041CIM3X-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:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041CIM3X-ADJ FAQ
1.How can I place an order for LM4041CIM3X-ADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CIM3X-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 LM4041CIM3X-ADJ reliable?
The price and inventory of LM4041CIM3X-ADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CIM3X-ADJ is usually 5 days.
3.What payment methods are accepted for LM4041CIM3X-ADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CIM3X-ADJ transactions.
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4.How is shipping managed for LM4041CIM3X-ADJ?
LM4041CIM3X-ADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CIM3X-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 LM4041CIM3X-ADJ?
For technical support, including LM4041CIM3X-ADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CIM3X-ADJ requirements.
6.How does Aetrix verify that LM4041CIM3X-ADJ is sourced from the original manufacturer or authorized distributors?
All LM4041CIM3X-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 LM4041CIM3X-ADJ meets industry standards.
7.What is the process for return or replacement of LM4041CIM3X-ADJ?
All LM4041CIM3X-ADJ units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CIM3X-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 LM4041CIM3X-ADJ part is unused and in its original packaging.
Return procedure for LM4041CIM3X-ADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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