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Texas Instruments LM4041CIZ-ADJ/NOPB
- Part No.:
- LM4041CIZ-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4041CIZ-ADJ/NOPB.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,505
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Product details
Overview
LM4041CIZ-ADJ/NOPB from Texas Instruments is a precision adjustable shunt voltage reference in TO-92 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 enables accurate voltage regulation in low-power analog signal chains.
For engineers reviewing the LM4041CIZ-ADJ/NOPB datasheet, LM4041CIZ-ADJ/NOPB pinout, LM4041CIZ-ADJ/NOPB application, or LM4041CIZ-ADJ/NOPB equivalent, key selection criteria include its adjustable output (1.24 V to 10 V), no-output-capacitor requirement, capacitive-load stability, reverse breakdown architecture, and AEC-Q100 Grade 1 qualification for automotive-grade thermal reliability.
Technical Context
The LM4041CIZ-ADJ/NOPB uses a bandgap-based shunt topology with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming to achieve ±0.5% initial accuracy. Its feedback (FB) pin enables external resistor-divider programming of output voltage between 1.24 V and 10 V while maintaining low dynamic impedance (0.3 Ω typical at 1 mA).
It functions as a two-terminal shunt device: cathode sinks current to regulate voltage across an external load, anode connects to ground, and FB senses the divided output. The TO-92 package provides 170°C/W junction-to-ambient thermal resistance and supports operation up to 125°C ambient without derating under typical PCB conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Reference Voltage | 1.233 V at 100 μA, enabling precise 5 V system regulation via external resistors |
| Initial Tolerance | ±0.5% at 25°C (C grade), corresponding to ±6.2 mV error at 5 V output |
| Tempco | ≤100 ppm/°C over −40°C to +125°C, limiting drift to ±12.5 mV across full range at 5 V |
| Operating Current Range | 60 μA to 12 mA - supports ultra-low-power sensor biasing and high-current DAC references |
| Output Noise | 20 μVRMS (10 Hz–10 kHz), suitable for 16-bit ADCs requiring <1 LSB noise at 5 V full scale |
| Dynamic Impedance | 0.3 Ω typical at 1 mA, ensuring stable regulation under fast load transients |
| Feedback Current | 60–100 nA at 25°C, minimizing divider resistor power loss and voltage error |
Pinout & Package
LM4041CIZ-ADJ/NOPB uses a 3-pin TO-92 package (4.30 mm × 4.30 mm body) with bottom-view pinout: Pin 1 = FB (feedback input), Pin 2 = Cathode (shunt current sink/output node), Pin 3 = Anode (ground reference).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (FB) | Input to internal reference amplifier | Senses divided output voltage; must be connected to resistor divider node - draws only 60–100 nA |
| Pin 2 (Cathode) | Shunt current path and output node | Sinks all excess current to maintain regulated voltage; connects to load positive rail |
| Pin 3 (Anode) | Ground reference terminal | Must be tied directly to system ground; serves as return path for shunt current |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output range | 1.24 V to 10 V via external resistor divider - supports diverse supply rails without redesign |
| No output capacitor required | Stable with zero output capacitance - eliminates BOM cost and layout area for decoupling |
| Capacitive load tolerance | Remains stable driving ≥100 nF loads - simplifies interface to ADC sample capacitors or op-amp inputs |
| AEC-Q100 Grade 1 qualified | Rated for −40°C to +125°C ambient - validated for engine control, battery management, and ADAS modules |
| Low quiescent current | 60 μA minimum operating current - extends battery life in portable instrumentation and remote sensors |
Applications
| Battery-Powered Precision Sensors | Data-Acquisition Front-Ends |
|---|---|
Use Scenario: Low-power gas sensor module powered by coin cell, requiring stable 2.5 V reference for 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Shunt reference providing ratiometric excitation and conversion reference. Use Value: 20 μVRMS noise and 100 ppm/°C tempco ensure <0.01% total error over temperature and battery discharge. | Use Scenario: Industrial PLC analog input card measuring 4–20 mA loop signals with 24-bit SAR ADC. IC Role / Device Role / Timing Role: Adjustable shunt reference set to 4.096 V for full-scale ADC mapping. Use Value: ±0.5% initial tolerance and 60 μA min current enable high-accuracy measurement without calibration. |
| Automotive Battery Monitoring | Energy Metering Reference |
Use Scenario: EV battery pack monitor IC measuring cell voltages across 125°C ambient under hood. IC Role / Device Role / Timing Role: Grade 1 qualified shunt reference supplying precision scaling for isolated voltage sense amplifiers. Use Value: Extended −40°C to +125°C operation and AEC-Q100 validation eliminate derating concerns in harsh environments. | Use Scenario: DIN-rail energy meter with metrology-grade ADC requiring stable 2.048 V reference. IC Role / Device Role / Timing Role: Low-drift shunt reference replacing larger, more expensive buried-Zener solutions. Use Value: 120 ppm long-term stability (1000 hrs) and 0.08% thermal hysteresis meet IEC 62053-22 Class 0.2 accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CIPK | Fixed 2.495 V reference; higher 2 mA min cathode current; 22 Ω typical ZOUT | Not adjustable; requires external resistor network for non-2.5 V outputs | Select when fixed 2.5 V output suffices and higher current capability is needed |
| MAX6126AASA+ | Series topology; 3-pin SOT-23; 1.25 V fixed; 3 ppm/°C max tempco; 12 μVRMS noise | Higher accuracy and lower noise but requires input voltage ≥ reference + dropout (~150 mV) | Select for ultra-low-noise, low-drift applications where supply headroom permits series architecture |
Compared with TL431CIPK and MAX6126AASA+, the LM4041CIZ-ADJ/NOPB uniquely combines adjustability, TO-92 through-hole compatibility, sub-100 ppm/°C drift, and true zero-capacitance stability - making it optimal for space-constrained, thermally demanding, or multi-rail analog designs where flexibility and ruggedness are prioritized over ultra-fine resolution.
Availability
LM4041CIZ-ADJ/NOPB is available at Aetrix Electronics and suitable for battery-powered equipment, data-acquisition systems, and automotive electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041CIZ-ADJ/NOPB 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, embedded processing, and power management technologies with over 50 years of innovation in precision analog ICs.
The LM4041-N product line delivers micro-power shunt voltage references optimized for space-constrained, low-current, and automotive-grade applications - emphasizing accuracy, thermal stability, and ease of use without external compensation.
FAQ
What is the maximum output voltage supported by LM4041CIZ-ADJ/NOPB?
The LM4041CIZ-ADJ/NOPB supports an adjustable output voltage range from 1.24 V to 10 V, determined by the external resistor divider connected to the FB pin. This upper limit is specified in the Absolute Maximum Ratings table and applies across the full operating temperature range. Exceeding 10 V risks violating the 15 V maximum output voltage rating and may cause irreversible damage to the device.
Does LM4041CIZ-ADJ/NOPB require an output capacitor for stability?
No, the LM4041CIZ-ADJ/NOPB does not require an output capacitor for stability. Its internal design eliminates the need for external stabilization capacitance while remaining stable with any capacitive load - including large values used in ADC sampling networks or op-amp input stages. This simplifies layout and reduces BOM count compared to legacy shunt references.
What is the minimum operating current for LM4041CIZ-ADJ/NOPB at 125°C?
At 125°C ambient, the LM4041CIZ-ADJ/NOPB requires a minimum operating current of 65 μA to maintain regulation within specifications. This value is confirmed in Section 5.8 of the datasheet for C-grade devices under extended temperature conditions. Operating below this current may result in loss of reference accuracy or regulation failure.
How is the feedback current of LM4041CIZ-ADJ/NOPB specified, and why does it matter?
The LM4041CIZ-ADJ/NOPB has a feedback current of 60–100 nA at 25°C, rising to ≤120 nA over −40°C to +125°C. This ultra-low input bias current minimizes voltage error in the external resistor divider, allowing use of high-value resistors (e.g., 1 MΩ top/249 kΩ bottom for 5 V) without significant loading-induced inaccuracy - critical for battery-operated systems.
Is LM4041CIZ-ADJ/NOPB qualified for automotive applications?
Yes, LM4041CIZ-ADJ/NOPB is AEC-Q100 qualified as part of the LM4041-N-Q1 family and meets Grade 1 requirements (−40°C to +125°C ambient). It is explicitly listed in TI's automotive-qualified documentation and supports applications such as battery monitoring, engine control sensors, and ADAS power management where extended temperature reliability is mandatory.
LM4041CIZ-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4041CIZ-ADJ/NOPB FAQ
1.How can I place an order for LM4041CIZ-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CIZ-ADJ/NOPB 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 LM4041CIZ-ADJ/NOPB reliable?
The price and inventory of LM4041CIZ-ADJ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CIZ-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM4041CIZ-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CIZ-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CIZ-ADJ/NOPB?
LM4041CIZ-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CIZ-ADJ/NOPB 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 LM4041CIZ-ADJ/NOPB?
For technical support, including LM4041CIZ-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CIZ-ADJ/NOPB requirements.
6.How does Aetrix verify that LM4041CIZ-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4041CIZ-ADJ/NOPB 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 LM4041CIZ-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM4041CIZ-ADJ/NOPB?
All LM4041CIZ-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CIZ-ADJ/NOPB, 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 LM4041CIZ-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM4041CIZ-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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