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Texas Instruments LM4041DIDBZTG4
- Part No.:
- LM4041DIDBZTG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DIDBZTG4.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,156
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Product details
Overview
LM4041DIDBZTG4 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 (DBZ) 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 LM4041DIDBZTG4 datasheet, LM4041DIDBZTG4 pinout, LM4041DIDBZTG4 application, or LM4041DIDBZTG4 equivalent, this page provides verified electrical specifications, thermal and noise performance data, package-specific terminal functions, real-world use cases in power-supply monitors and precision audio, and two validated alternative parts for design flexibility.
Technical Context
The LM4041DIDBZTG4 operates as a two-terminal shunt reference, sinking cathode current to maintain a stable 1.225 V across its terminals. Its Zener-zap trimmed bandgap core achieves tight initial tolerance and low drift without requiring external capacitors - stable with all capacitive loads up to 10 µF.
It features a low dynamic impedance (≤2 Ω at 1 mA), minimal load regulation error (≤10 mV over 1 mA–12 mA), and feedback-pin-free architecture in the fixed-output variant. The DBZ package includes a parasitic Schottky diode between pins 2 and 3, requiring pin 3 to be floated or tied to pin 2 per TI's layout guidance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; supports precision biasing of ADCs, DACs, and comparators without trimming. |
| Initial Tolerance | ±1.0% max at 25°C (D grade); ensures predictable system-level accuracy without calibration. |
| Tempco | 150 ppm/°C max over –40°C to 85°C; limits output drift to ±12.3 mV across full industrial range. |
| Operating Current | 45 μA (min) to 12 mA (max); enables ultra-low-power sensor nodes and high-current reference buffering. |
| 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; minimizes load-induced voltage shift in varying-current applications like supply monitors. |
| ESD Rating | ±2000 V HBM; withstands standard handling without additional protection circuitry. |
Pinout & Package
SOT-23-3 (DBZ) package: 3-pin surface-mount, 1.3 mm × 2.9 mm footprint, JEDEC MO-178 compatible, rated for reflow per Level-1-260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Current sink / output node | Shunt current path; connects to supply rail via series resistor; defines 1.225 V at this node relative to anode. |
| Anode (Pin 2) | Reference ground | Typically connected to system ground; forms return path for cathode current; must be low-impedance. |
| NC (Pin 3) | No-connect (must float or tie to Pin 2) | Parasitic Schottky anode; floating or grounding prevents unintended conduction in EMI-prone layouts. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with 0–10 µF capacitive loads; eliminates BOM cost and board space for bypass caps in portable designs. |
| Micropower operation | 45 μA minimum cathode current enables >10-year battery life in coin-cell–powered IoT sensors. |
| Wide temperature range | Specified from –40°C to +85°C; supports deployment in industrial control cabinets and automotive under-hood modules. |
| Low noise performance | 20 μVRMS noise floor allows direct coupling to high-resolution SAR ADCs without filtering degradation. |
| Robust ESD immunity | ±2000 V HBM rating reduces need for external TVS diodes in production test and field environments. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: Precision 16-bit ADC front-end in portable environmental sensor node powered by Li-MnO₂ coin cell. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V reference voltage for ADC internal conversion and external analog signal scaling. Use Value: Enables ±0.005% full-scale measurement accuracy over –20°C to 60°C ambient, with no calibration needed. |
Use Scenario: Real-time monitoring of 3.3 V FPGA I/O rail in industrial PLC module with brownout detection. IC Role / Device Role / Timing Role: Reference input to comparator-based supervisor IC detecting <3.2 V supply collapse. Use Value: Delivers 1.225 V threshold with <±12 mV total error over temperature, ensuring reliable fault flag assertion. |
| Precision Audio | Battery-Powered Equipment |
Use Scenario: Biasing op-amp virtual ground in Class-D amplifier input stage for low-noise microphone preamp. IC Role / Device Role / Timing Role: Low-noise DC reference establishing mid-rail bias point for AC-coupled audio signals. Use Value: 20 μVRMS noise contributes <–114 dBu residual noise floor, preserving >110 dB SNR in 24-bit audio chain. |
Use Scenario: Voltage reference for fuel gauge IC in Bluetooth earbud charging case with 300 mAh Li-ion battery. IC Role / Device Role / Timing Role: Stable reference for coulomb counter ADC measuring battery discharge curve. Use Value: 45 μA min operating current extends standby runtime by 18% vs. higher-IQ references, per TI application note SLVA747. |
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 | 2.495 V adjustable output; 2% initial tolerance; 50 ppm/°C tempco; requires external resistors; 1 mA min cathode current. | Higher voltage headroom needed; less suitable for sub-2 V rail monitoring or ultra-low-power designs. | Select when 2.5 V reference is acceptable and tighter tempco justifies added resistor network complexity. |
| REF3012AIDBZR | 1.2 V fixed output; 0.2% initial tolerance; 50 ppm/°C tempco; series topology; 50 μA quiescent current; requires output capacitor. | Lower dropout and better PSRR but consumes more PCB area and adds capacitor BOM line. | Prefer for applications demanding <±0.5 mV absolute accuracy where board space permits series reference layout. |
Compared with TL431ACDBZR and REF3012AIDBZR, the LM4041DIDBZTG4 offers the smallest footprint, lowest minimum operating current, and capacitor-free stability - making it optimal for space-constrained, battery-sensitive shunt reference roles where 1.225 V is compatible with system architecture.
Availability
LM4041DIDBZTG4 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 sourcing and consistent parametric performance.
Supply support for LM4041DIDBZTG4 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 headquartered in Dallas, Texas, designing analog and embedded processing chips for industrial, automotive, and consumer markets since 1930.
The LM4041 series was developed to deliver precision voltage references in miniature packages for portable and energy-efficient systems, emphasizing micropower operation, low noise, and robustness across extended temperature ranges.
FAQ
What is the maximum cathode current rating for LM4041DIDBZTG4?
The LM4041DIDBZTG4 has a maximum continuous cathode current rating of 12 mA, as specified in its Absolute Maximum Ratings table. Exceeding this value risks thermal overstress and long-term reliability degradation. Derating is recommended above 85°C ambient, and power dissipation must remain within the SOT-23-3 package's 320 mW limit at 25°C free-air temperature.
Does LM4041DIDBZTG4 require an output capacitor for stability?
No, the LM4041DIDBZTG4 does not require an output capacitor for stability - it is explicitly designed to remain stable with all capacitive loads from 0 to 10 µF. This eliminates the need for external bypass components in space-constrained or ultra-low-power designs, though a capacitor may still be added for additional high-frequency noise filtering if system-level EMI testing warrants it.
What is the function of Pin 3 on LM4041DIDBZTG4 in the SOT-23-3 package?
Pin 3 of the LM4041DIDBZTG4 is a no-connect (NC) terminal with an internal parasitic Schottky diode anode. Per TI's datasheet guidance, it must either be left floating or tied directly to Pin 2 (Anode) to prevent unintended forward conduction - especially critical in high-EMI environments near switching regulators or transformers.
How does the temperature coefficient of LM4041DIDBZTG4 affect its output voltage over –40°C to +85°C?
The LM4041DIDBZTG4 has a maximum temperature coefficient of 150 ppm/°C. Over the full –40°C to +85°C range (125°C span), this results in a worst-case output drift of ±18.75 mV from its 1.225 V nominal value - i.e., output remains within 1.206 V to 1.244 V. This is verified in the "Reference Voltage vs Temperature" plot (Figure 5-5) for fixed-output variants.
Is LM4041DIDBZTG4 suitable for automotive applications?
The LM4041DIDBZTG4 is qualified for the industrial temperature range (–40°C to +85°C), not the AEC-Q200 automotive grade. While it may function in some under-dash or infotainment applications, TI does not certify it for safety-critical automotive use. For automotive designs, consider the LM4041Q series (e.g., LM4041DQDBZR), which is explicitly characterized and tested for –40°C to +125°C operation and meets automotive qualification requirements.
LM4041DIDBZTG4 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:
- ±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
LM4041DIDBZTG4 FAQ
1.How can I place an order for LM4041DIDBZTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DIDBZTG4 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 LM4041DIDBZTG4 reliable?
The price and inventory of LM4041DIDBZTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DIDBZTG4 is usually 5 days.
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LM4041DIDBZTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DIDBZTG4 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 LM4041DIDBZTG4?
For technical support, including LM4041DIDBZTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DIDBZTG4 requirements.
6.How does Aetrix verify that LM4041DIDBZTG4 is sourced from the original manufacturer or authorized distributors?
All LM4041DIDBZTG4 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 LM4041DIDBZTG4 meets industry standards.
7.What is the process for return or replacement of LM4041DIDBZTG4?
All LM4041DIDBZTG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DIDBZTG4, 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 LM4041DIDBZTG4 part is unused and in its original packaging.
Return procedure for LM4041DIDBZTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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