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Texas Instruments LM4041DIDBZRG4
- Part No.:
- LM4041DIDBZRG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DIDBZRG4.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LM4041DIDBZRG4 from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±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 - used in high-accuracy power-supply monitoring and data-acquisition front-ends.
For engineers reviewing the LM4041DIDBZRG4 datasheet, LM4041DIDBZRG4 pinout, LM4041DIDBZRG4 application, or LM4041DIDBZRG4 equivalent, key selection criteria include guaranteed low-current operation down to 45 μA, no-output-capacitor stability, industrial temperature range (–40°C to +85°C), and SOT-23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The LM4041DIDBZRG4 implements a Zener-based shunt reference architecture trimmed via Zener-zap during wafer sort to achieve its D-grade tolerance. It operates as a two-terminal device (anode grounded, cathode supplying regulated voltage) with no internal feedback loop - regulation relies on external series resistor and load current balance.
Its dynamic impedance remains below 2 Ω across 1 mA cathode current and 120 Hz test frequency, and it maintains stable output under all capacitive loads without requiring an output capacitor - a direct result of low output impedance and inherent phase margin design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables direct replacement of legacy 1.2 V references with tighter accuracy. |
| Initial Tolerance | ±1.0% max at 25°C (D grade); supports cost-sensitive applications where 0.5% or better is not required. |
| Temp Coefficient | 150 ppm/°C max over –40°C to +85°C; ensures ≤1.2 mV drift across full industrial range. |
| Noise (10 Hz–10 kHz) | 20 μVRMS typical; suitable for 16-bit ADC biasing and precision sensor excitation without added filtering. |
| Min Cathode Current | 45 μA typical; allows operation in ultra-low-power systems such as battery-backed monitors and energy-harvesting nodes. |
| Max Cathode Current | 12 mA absolute maximum; defines upper limit for series resistor sizing in shunt regulator configurations. |
| Operating Temp Range | –40°C to +85°C (I-grade); qualified for industrial control, metering, and automotive body electronics. |
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, rated for reflow per Level-1-260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink & output node | Connected to supply rail via series resistor; delivers regulated 1.225 V to load when biased above min current. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; forms return path for cathode current and sets output voltage reference point. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to anode per TI EMI guidance - not usable as feedback or enable. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates stably with any capacitive load (0–∞), eliminating need for output bypass capacitor and reducing BOM count. |
| Low quiescent current | 45 μA typical minimum cathode current enables use in always-on circuits powered by coin cells or energy harvesters. |
| High ESD robustness | ±2000 V HBM rating protects against handling damage during assembly and field service in industrial environments. |
| Wide current operating range | Functional from 45 μA to 12 mA cathode current - accommodates both microamp-sensor biasing and milliamp-load regulation. |
| Long-term stability | 120 ppm drift after 1000 hours at 25°C ensures calibration integrity in test equipment and metrology applications. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution ADC reference in portable multimeters and PLC analog input modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225 V reference for SAR ADC conversion. Use Value: 20 μVRMS noise and 150 ppm/°C drift preserve ENOB in 16-bit measurements across temperature. | Use Scenario: Overvoltage/undervoltage detection in telecom DC-DC converter supervision circuits. IC Role / Device Role / Timing Role: Precision threshold generator for comparator inputs monitoring 3.3 V or 5 V rails. Use Value: ±1.0% tolerance ensures reliable trip-point accuracy without trimming, reducing factory calibration steps. |
| Instrumentation and Test Equipment | Battery-Powered Equipment |
Use Scenario: Calibration reference in handheld oscilloscope vertical amplifiers and signal source outputs. IC Role / Device Role / Timing Role: Low-drift DC bias source for op-amp offset nulling and gain-setting networks. Use Value: 120 ppm long-term stability minimizes recalibration frequency in field-deployed test gear. | Use Scenario: Reference for fuel gauging ICs and battery protection circuits in medical wearables and IoT sensors. IC Role / Device Role / Timing Role: Micropower shunt reference enabling continuous voltage monitoring during sleep modes. Use Value: 45 μA min operating current extends battery life in devices running from CR2032 or Li-SOCl₂ cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBZR | Adjustable 2.495 V reference; higher 100 μA min cathode current; 50 ppm/°C tempco (A grade) | Requires external resistor divider; unsuitable for direct 1.225 V replacement; better for >2.5 V rails | Select when adjustable output or tighter tempco is needed, and board layout allows 3-pin configuration. |
| REF3012AIDBZR | 1.2 V series reference; 30 ppm/°C max tempco; 50 μA supply current; requires output capacitor | Three-terminal series topology; higher quiescent current; needs decoupling cap; not shunt-compatible | Choose for ultra-low-drift requirements where PCB area permits series reference layout and capacitor placement. |
Compared with TL431ACDBZR and REF3012AIDBZR, the LM4041DIDBZRG4 offers direct 1.225 V fixed output, lowest minimum operating current (45 μA), and zero-output-capacitor operation - making it optimal for space- and power-constrained shunt-regulator designs where pin count and bill-of-materials simplicity are critical.
Availability
LM4041DIDBZRG4 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 availability and traceable sourcing.
Supply support for LM4041DIDBZRG4 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LM4041 product line delivers precision shunt voltage references optimized for micropower operation, capacitor-free stability, and broad temperature performance - targeting instrumentation, energy metering, and portable measurement systems.
FAQ
What is the output voltage and tolerance of the LM4041DIDBZRG4?
The LM4041DIDBZRG4 provides a fixed 1.225 V nominal output voltage with a maximum initial tolerance of ±1.0% at 25°C (D grade). This tolerance holds across the full industrial temperature range of –40°C to +85°C, and the device is specified with a maximum temperature coefficient of 150 ppm/°C. The LM4041DIDBZRG4 does not support adjustable output - only the "ADJ" variants offer that functionality.
Does the LM4041DIDBZRG4 require an output capacitor for stability?
No, the LM4041DIDBZRG4 is designed to remain stable with all capacitive loads and does not require an output capacitor between cathode and anode. This eliminates a common BOM item and simplifies layout in space-constrained applications. TI explicitly confirms capacitor-free operation in the datasheet, and the device's low dynamic impedance (<2 Ω) ensures robust phase margin across load conditions.
What is the minimum cathode current needed for proper regulation of the LM4041DIDBZRG4?
The LM4041DIDBZRG4 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 requirement enables use in micropower applications such as battery-backed supervisors and energy-harvesting systems. Below this current, output voltage may deviate beyond specification limits.
Which package type and pin configuration does the LM4041DIDBZRG4 use?
The LM4041DIDBZRG4 uses the SOT-23-3 (DBZ) package with standard pinout: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC (no connect). Pin 3 must either float or be tied to Pin 2 (anode) per TI's EMI mitigation guidance. The DBZ package measures 2.92 mm × 1.3 mm and is RoHS-compliant with NIPDAU lead finish and Level-1 moisture sensitivity rating.
How does the LM4041DIDBZRG4 differ from the LM4041BIDBZRG4 or LM4041AIDBZRG4?
The LM4041DIDBZRG4 differs from LM4041BIDBZRG4 and LM4041AIDBZRG4 solely in initial voltage tolerance and temperature coefficient: D grade = ±1.0% / 150 ppm/°C, B grade = ±0.2% / 100 ppm/°C, A grade = ±0.1% / 100 ppm/°C. All share identical pinout, package, noise (20 μVRMS), min current (45 μA), and functional behavior - only accuracy grade varies. The "D" suffix denotes the lowest-cost, widest-tolerance variant in the family.
LM4041DIDBZRG4 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:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041DIDBZRG4 FAQ
1.How can I place an order for LM4041DIDBZRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DIDBZRG4 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 LM4041DIDBZRG4 reliable?
The price and inventory of LM4041DIDBZRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DIDBZRG4 is usually 5 days.
3.What payment methods are accepted for LM4041DIDBZRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DIDBZRG4 transactions.
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4.How is shipping managed for LM4041DIDBZRG4?
LM4041DIDBZRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DIDBZRG4 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 LM4041DIDBZRG4?
For technical support, including LM4041DIDBZRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DIDBZRG4 requirements.
6.How does Aetrix verify that LM4041DIDBZRG4 is sourced from the original manufacturer or authorized distributors?
All LM4041DIDBZRG4 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 LM4041DIDBZRG4 meets industry standards.
7.What is the process for return or replacement of LM4041DIDBZRG4?
All LM4041DIDBZRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DIDBZRG4, 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 LM4041DIDBZRG4 part is unused and in its original packaging.
Return procedure for LM4041DIDBZRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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