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Texas Instruments LM4041CQDBZTG4
- Part No.:
- LM4041CQDBZTG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CQDBZTG4.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,912
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Product details
Overview
LM4041CQDBZTG4 from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise. It operates from 45 μA to 12 mA cathode current and is qualified for automotive extended temperature range (–40°C to 125°C), making it suitable for high-accuracy analog sensing in battery-powered instrumentation.
For engineers reviewing the LM4041CQDBZTG4 datasheet, LM4041CQDBZTG4 pinout, LM4041CQDBZTG4 application, or LM4041CQDBZTG4 equivalent, key selection criteria include its guaranteed C-grade accuracy over automotive temperature range, SC-70-compatible SOT-23-3 package, no-output-capacitor stability, and low dynamic impedance (≤1.5 Ω at 1 mA).
Technical Context
The LM4041CQDBZTG4 implements a Zener-based shunt reference architecture with fuse/Zener-zap trimming during wafer sort to achieve ±0.5% output tolerance. Its internal bandgap-derived reference core delivers stable 1.225 V output across cathode currents from 45 μA to 12 mA and ambient temperatures from –40°C to 125°C.
It features low dynamic impedance (0.5–1.5 Ω), wideband noise of 20 μVRMS (10 Hz–10 kHz), and inherent stability with all capacitive loads - eliminating need for external bypass capacitors. The device uses a two-terminal configuration (cathode/anode) and requires no feedback pin in fixed-voltage mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables precise biasing of ADCs, DACs, and comparators without external resistors. |
| Initial Tolerance | ±0.5% max at 25°C (C grade); ensures system-level calibration accuracy without post-manufacture trimming. |
| Temp Coefficient | 100 ppm/°C max over –40°C to 125°C; maintains <±1.25 mV drift across full automotive operating range. |
| Noise (10 Hz–10 kHz) | 20 μVRMS; supports high-resolution data acquisition systems requiring sub-LSB noise performance. |
| Cathode Current Range | 45 μA (typ) to 12 mA; allows operation in ultra-low-power sensor nodes and robust power-supply monitoring circuits. |
| Dynamic Impedance | 0.5 Ω (typ) at 1 mA; minimizes load-induced output variation in dynamically varying current applications. |
| Operating Temp | –40°C to 125°C (Q grade); qualified for under-hood automotive, industrial control, and energy metering environments. |
Pinout & Package
SOT-23-3 (DBZ) package: compact 2.92 mm × 1.3 mm surface-mount outline with gull-wing leads, JEDEC MO-178 compliant, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / output node | Connects to supply rail via series resistor; regulates voltage by sinking excess current to anode. |
| Anode (Pin 2) | Reference ground / return path | Typically tied to system ground; forms the reference potential for cathode voltage regulation. |
| NC (Pin 3) | No-connect terminal | Must be left floating or connected to anode per TI ESD guidance; not internally bonded in DBZ fixed-voltage variant. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Stable with any capacitive load up to 10 µF; eliminates BOM cost and layout area for bypass capacitor. |
| Automotive temperature qualification | Specified and tested over –40°C to 125°C ambient; meets AEC-Q100 stress test requirements for reliability. |
| Micropower operation | 45 µA typical minimum cathode current; enables >10-year battery life in always-on sensor monitors. |
| Low dynamic impedance | 0.5 Ω typical at 1 mA; reduces output voltage shift under transient load changes in precision analog front-ends. |
| ESD robustness | ±2000 V HBM rating; withstands handling and board assembly without special ESD precautions beyond standard practices. |
Applications
| Energy Metering | Automotive Cabin Sensors |
|---|---|
Use Scenario: High-accuracy AC voltage and current sampling in Class 0.2 smart meters. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for 24-bit delta-sigma ADCs measuring grid parameters. Use Value: ±0.5% tolerance and 100 ppm/°C drift ensure metering accuracy remains within metrology certification limits across temperature. | Use Scenario: Cabin temperature, humidity, and CO₂ sensing in HVAC control modules. IC Role / Device Role / Timing Role: Supplies reference voltage to low-power analog signal conditioning circuits feeding microcontroller ADCs. Use Value: 45 µA min operating current enables direct connection to low-quiescent LDO outputs, minimizing system standby power. |
| Portable Test Equipment | Industrial Process Transmitters |
Use Scenario: Handheld multimeters and portable oscilloscope front-ends requiring calibrated DC voltage references. IC Role / Device Role / Timing Role: Serves as primary voltage reference for autoranging analog-to-digital conversion stages. Use Value: 20 μVRMS noise floor supports true 5½-digit resolution without additional filtering or averaging. | Use Scenario: 4–20 mA loop-powered transmitters for pressure, flow, and level measurement in hazardous areas. IC Role / Device Role / Timing Role: Generates stable reference for current-loop DACs and sensor excitation circuits. Use Value: Stable operation down to 45 µA cathode current allows full functionality even at lowest loop current (4 mA), ensuring diagnostic capability. |
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 | 2.495 V adjustable output; higher 100 µA min cathode current; 50 ppm/°C tempco (B grade); SOT-23-3 package. | Requires external resistor divider for 1.225 V; unsuitable where fixed output and micropower are mandatory. | Select when higher output voltage or tighter tempco is needed; avoid if 1.225 V fixed output or sub-100 µA operation is required. |
| MAX6126AASA+ | 1.25 V output; ±0.1% initial accuracy; 3 ppm/°C tempco; SO-8 package; 120 µA quiescent current. | Higher accuracy and lower drift but larger footprint and 2.7× higher operating current; not automotive-qualified. | Choose for lab-grade instrumentation where ultimate stability outweighs size and power constraints; not recommended for automotive or battery-critical designs. |
Compared with TL431CDBZR and MAX6126AASA+, the LM4041CQDBZTG4 uniquely combines fixed 1.225 V output, automotive temperature range, micropower operation (45 µA), and SOT-23-3 packaging - enabling space-constrained, battery-aware, and automotive-qualified precision reference designs without design compromises.
Availability
LM4041CQDBZTG4 is available at Aetrix Electronics and suitable for energy metering, automotive cabin sensors, and portable test equipment requiring stable component supply across long production lifecycles and demanding environmental conditions.
Supply support for LM4041CQDBZTG4 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 company delivering analog and embedded processing solutions, with leadership in precision analog ICs and automotive-qualified components.
The LM4041 product line delivers micropower shunt voltage references optimized for high-accuracy, low-power, and thermally robust applications including automotive systems, portable instrumentation, and industrial process control.
FAQ
What is the output voltage and tolerance of the LM4041CQDBZTG4?
The LM4041CQDBZTG4 provides a fixed 1.225 V nominal output voltage with a maximum initial tolerance of ±0.5% at 25°C (C grade). This tolerance is guaranteed over the full operating temperature range of –40°C to 125°C, and the device maintains tight regulation across cathode currents from 45 μA to 12 mA. The LM4041CQDBZTG4 achieves this using factory-trimmed Zener breakdown voltage during wafer sort.
Does the LM4041CQDBZTG4 require an external output capacitor?
No, the LM4041CQDBZTG4 does not require an external output capacitor for stability. It is explicitly designed to remain stable with all capacitive loads, including 0 μF, and TI confirms operation without any bypass capacitor across cathode and anode. Adding capacitance is optional and will not degrade performance - the LM4041CQDBZTG4 remains stable up to at least 10 μF per datasheet characterization.
What is the operating temperature range of the LM4041CQDBZTG4?
The LM4041CQDBZTG4 is qualified for the extended automotive temperature range of –40°C to 125°C (Q grade). This rating applies across all electrical specifications including output voltage tolerance, temperature coefficient, and dynamic impedance. The device undergoes full characterization and screening per TI's automotive qualification standards, making it suitable for under-hood and cabin applications where thermal robustness is critical.
What package type and pin configuration does the LM4041CQDBZTG4 use?
The LM4041CQDBZTG4 uses the SOT-23-3 (DBZ) package: a 3-pin, gull-wing surface-mount outline measuring 2.92 mm × 1.3 mm. Pin 1 is Cathode, Pin 2 is Anode, and Pin 3 is NC (no-connect), which must be left floating or tied to Anode per TI's ESD guidance. This matches the mechanical and thermal specs in TI's DBZ package drawing SLMS224.
How does the LM4041CQDBZTG4 compare to the LM4041A or B grades?
The LM4041CQDBZTG4 offers ±0.5% initial tolerance and 100 ppm/°C max temperature coefficient, positioning it between the tighter A grade (±0.1%, 100 ppm/°C) and looser B grade (±0.2%, 100 ppm/°C). All three share identical package, pinout, noise (20 μVRMS), and current range (45 μA–12 mA). The C grade delivers optimal cost-performance balance for automotive and industrial applications where ±0.5% accuracy suffices without premium pricing.
LM4041CQDBZTG4 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:
- Discontinued at Digi-Key
- 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:
- 80 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041CQDBZTG4 FAQ
1.How can I place an order for LM4041CQDBZTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CQDBZTG4 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 LM4041CQDBZTG4 reliable?
The price and inventory of LM4041CQDBZTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CQDBZTG4 is usually 5 days.
3.What payment methods are accepted for LM4041CQDBZTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CQDBZTG4 transactions.
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4.How is shipping managed for LM4041CQDBZTG4?
LM4041CQDBZTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CQDBZTG4 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 LM4041CQDBZTG4?
For technical support, including LM4041CQDBZTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CQDBZTG4 requirements.
6.How does Aetrix verify that LM4041CQDBZTG4 is sourced from the original manufacturer or authorized distributors?
All LM4041CQDBZTG4 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 LM4041CQDBZTG4 meets industry standards.
7.What is the process for return or replacement of LM4041CQDBZTG4?
All LM4041CQDBZTG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CQDBZTG4, 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 LM4041CQDBZTG4 part is unused and in its original packaging.
Return procedure for LM4041CQDBZTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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