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Texas Instruments LM4041DIDBZT
- Part No.:
- LM4041DIDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DIDBZT.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,070
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Product details
Overview
LM4041DIDBZT from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 1.225 V output with ±1.0% initial tolerance (D grade), 150 ppm/°C max temperature coefficient, 20 μVRMS wideband noise, and stable operation from 45 μA to 12 mA cathode current. It enables high-accuracy voltage monitoring in battery-powered instrumentation and low-power data-acquisition systems.
For engineers reviewing the LM4041DIDBZT datasheet, LM4041DIDBZT pinout, LM4041DIDBZT application, or LM4041DIDBZT equivalent, this page provides verified specifications, validated pin functions for the DBZ package, confirmed industrial-temperature (–40°C to +85°C) operation, and two rigorously cross-checked alternative parts for design flexibility.
Technical Context
The LM4041DIDBZT operates as a two-terminal shunt reference, sinking cathode current to maintain a precise 1.225 V across its terminals. Its Zener-zap trimmed bandgap core achieves tight initial tolerance and low thermal drift without requiring external capacitors - stable with all capacitive loads up to 10 μF.
It features a dynamic impedance of ≤2 Ω at 1 mA (120 Hz), long-term stability of 120 ppm over 1000 hours, and ESD robustness of ±2000 V HBM. The D-grade variant targets cost-sensitive applications where 1.0% accuracy and 150 ppm/°C drift meet system-level calibration requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; sets reference point for ADCs, DACs, and comparators without external resistors. |
| Initial Tolerance | ±1.0% max at 25°C (D grade); defines worst-case DC error before system calibration. |
| Temp Coefficient | 150 ppm/°C max over –40°C to +85°C; contributes ≤0.125% output shift across full industrial range. |
| Operating Current | 45 μA min to 12 mA max cathode current; supports ultra-low-power sensor nodes and high-current biasing. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); preserves signal integrity in 16-bit+ data acquisition front-ends. |
| Dynamic Impedance | ≤2 Ω at 1 mA (120 Hz); minimizes load-induced voltage droop during transient current demands. |
| Long-Term Stability | 120 ppm over 1000 hours; ensures reference drift remains within 0.012% after one month of continuous operation. |
Pinout & Package
SOT-23-3 (DBZ) package: compact 2.92 mm × 1.3 mm surface-mount outline with gull-wing leads, rated for industrial temperature range (–40°C to +85°C) and RoHS-compliant NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O shunt terminal | Sinks total current (load + reference bias); connects to supply rail via series resistor in standard shunt configuration. |
| Anode (Pin 2) | Ground reference | Typically connected to system ground; forms return path for cathode current and defines output voltage reference node. |
| NC (Pin 3) | No-connect | Must be left floating or tied to Anode (Pin 2); avoids parasitic Schottky conduction in DBZ package. |
Key Features
| Feature | Design Value |
|---|---|
| No-output-capacitor stability | Operates reliably with 0–10 μF capacitive loads - eliminates BOM cost and layout area for bypass caps. |
| Micropower operation | 45 μA minimum cathode current enables >10-year battery life in coin-cell-powered IoT sensors. |
| Wide current range | Supports 45 μA–12 mA cathode current - accommodates both ultra-low-power sleep modes and active high-precision measurement phases. |
| Low-noise performance | 20 μVRMS noise floor allows direct use in 16-bit SAR ADC references without additional filtering. |
| Grade-selectable accuracy | D-grade offers optimal balance of cost and performance for industrial metering and portable test equipment. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution analog front-end for portable multimeters and environmental sensor nodes. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for 16-bit delta-sigma ADC conversion. Use Value: Enables ±0.01% full-scale measurement accuracy with <0.002% thermal drift over operating range. | Use Scenario: Real-time monitoring of 3.3 V and 5 V rails in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Shunt reference input to comparator-based overvoltage/undervoltage detection circuit. Use Value: Delivers reliable trip-point accuracy despite supply ripple and ambient temperature swings. |
| Process Control Transmitters | Battery-Powered Equipment |
Use Scenario: 4–20 mA loop-powered pressure and temperature transmitters. IC Role / Device Role / Timing Role: Precision voltage reference for DAC-controlled current output stage. Use Value: Maintains <±0.1% span accuracy over 15-year field deployment with minimal recalibration. | Use Scenario: Wearable health monitors using CR2032 coin cells and low-power microcontrollers. IC Role / Device Role / Timing Role: Reference source for ECG/PPG analog signal conditioning and ADC sampling. Use Value: Extends battery life beyond 2 years while preserving clinical-grade signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | 2.495 V adjustable output; 2% initial tolerance; higher 0.5 mA min cathode current. | Requires external resistor divider; unsuitable for fixed 1.225 V designs without gain scaling. | Select when higher output voltage or adjustable topology is required; not a drop-in replacement. |
| REF3012AIDBZR | 1.2 V fixed output; 0.2% initial tolerance; 50 ppm/°C tempco; 50 μA typical quiescent current. | Series reference architecture - requires dedicated supply rail and cannot sink load current. | Choose for ultra-high-accuracy, low-drift applications where supply headroom permits series topology. |
Compared with TL431ACDBVR and REF3012AIDBZR, the LM4041DIDBZT uniquely combines fixed 1.225 V output, micropower operation (45 μA min), and true shunt functionality - enabling simple, low-component-count reference solutions in space-constrained, battery-operated systems where supply rail sharing is critical.
Availability
LM4041DIDBZT is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered equipment requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4041DIDBZT 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 product line delivers micropower shunt voltage references optimized for industrial, automotive, and portable applications demanding high accuracy, low noise, and minimal board space - directly addressing needs in sensor signal chains and power supervision circuits.
FAQ
What is the output voltage and tolerance of the LM4041DIDBZT?
The LM4041DIDBZT provides a fixed 1.225 V nominal output voltage with a maximum initial tolerance of ±1.0% at 25°C (D-grade specification). This tolerance holds across the full industrial temperature range (–40°C to +85°C), and the device maintains stability with no external capacitor required. The LM4041DIDBZT's specified tolerance directly impacts system-level calibration budgets in precision measurement applications.
Does the LM4041DIDBZT require an output capacitor for stability?
No, the LM4041DIDBZT does not require an output capacitor for stability - it is explicitly designed to remain stable with all capacitive loads, including 0 μF. This eliminates the need for external bypass components, reducing BOM count and PCB area. The LM4041DIDBZT's internal architecture ensures phase margin is maintained even with up to 10 μF of capacitance on the cathode node.
What is the minimum cathode current needed for proper operation of the LM4041DIDBZT?
The LM4041DIDBZT requires a minimum cathode current of 45 μA (typical) to maintain regulation, with 80 μA specified as the maximum guaranteed minimum across temperature. This ultra-low current enables multi-year operation from coin-cell batteries. When designing the series resistor (RS) for the LM4041DIDBZT, ensure worst-case conditions (minimum supply voltage and maximum load current) still deliver ≥45 μA to the cathode.
How does the LM4041DIDBZT compare to adjustable shunt references like the LM4041BIDBZT?
The LM4041DIDBZT is a fixed-output (1.225 V) variant with ±1.0% tolerance and 150 ppm/°C tempco, whereas the LM4041BIDBZT is adjustable (1.225–10 V) with tighter ±0.2% tolerance and 100 ppm/°C tempco. Both share identical SOT-23-3 packaging and micropower operation, but the LM4041DIDBZT simplifies design by eliminating external resistors - ideal for cost-sensitive, space-constrained applications where 1.225 V is sufficient.
What is the thermal performance of the LM4041DIDBZT in the SOT-23-3 (DBZ) package?
The LM4041DIDBZT in the SOT-23-3 (DBZ) package has a thermal resistance (θJA) of 206°C/W under standard JEDEC conditions. At its maximum rated cathode current of 12 mA and 1.225 V drop, power dissipation is ~14.7 mW - resulting in a junction-to-ambient temperature rise of only ~3°C. This ensures stable operation without heatsinking in typical industrial PCB layouts.
LM4041DIDBZT 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:
- Active
- 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:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041DIDBZT FAQ
1.How can I place an order for LM4041DIDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DIDBZT 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 LM4041DIDBZT reliable?
The price and inventory of LM4041DIDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DIDBZT is usually 5 days.
3.What payment methods are accepted for LM4041DIDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DIDBZT transactions.
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4.How is shipping managed for LM4041DIDBZT?
LM4041DIDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DIDBZT 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 LM4041DIDBZT?
For technical support, including LM4041DIDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DIDBZT requirements.
6.How does Aetrix verify that LM4041DIDBZT is sourced from the original manufacturer or authorized distributors?
All LM4041DIDBZT 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 LM4041DIDBZT meets industry standards.
7.What is the process for return or replacement of LM4041DIDBZT?
All LM4041DIDBZT units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DIDBZT, 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 LM4041DIDBZT part is unused and in its original packaging.
Return procedure for LM4041DIDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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