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Texas Instruments LM4041C12IDBZT
- Part No.:
- LM4041C12IDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041C12IDBZT.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:719
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Product details
Overview
LM4041C12IDBZT 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, 20 μVRMS wideband noise, and stable operation from 45 μA to 12 mA cathode current. It serves as a compact, low-drift voltage reference in high-accuracy analog signal chains and portable power monitoring circuits.
For engineers reviewing the LM4041C12IDBZT datasheet, LM4041C12IDBZT pinout, LM4041C12IDBZT application, or LM4041C12IDBZT equivalent, this page delivers verified electrical specifications, SOT-23-3 pin mapping, industrial-temperature (–40°C to +85°C) performance data, and real-world design context for precision voltage referencing in space-constrained systems.
Technical Context
The LM4041C12IDBZT 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 ±0.5% output tolerance at 25°C and maintains ≤100 ppm/°C drift over –40°C to +85°C, with dynamic impedance under 1.5 Ω at 1 mA.
No external capacitor is required for stability - it remains functional with all capacitive loads due to inherent low-output-impedance design and internal compensation. The device draws only 45 μA minimum cathode current, enabling use in battery-powered instrumentation where quiescent current directly impacts runtime.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables direct replacement of legacy 1.2 V references without resistor divider redesign. |
| Initial Tolerance | ±0.5% at 25°C (C grade); supports 12-bit ADC biasing and sensor excitation requiring <6.1 mV absolute error. |
| Temp Coefficient | ≤100 ppm/°C over –40°C to +85°C; contributes ≤0.85 mV drift across full industrial range, critical for metering accuracy. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); low enough to avoid degrading SNR in 16-bit SAR ADC reference paths. |
| Cathode Current Range | 45 μA (min) to 12 mA (max); allows flexible RS resistor selection for varying load currents and supply voltages. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA, 120 Hz; ensures minimal output voltage shift during transient load changes in feedback loops. |
| Long-Term Stability | 120 ppm after 1000 hours; supports calibration retention in field-deployed test equipment without periodic recalibration. |
Pinout & Package
LM4041C12IDBZT uses the 3-pin SOT-23 (DBZ) package - surface-mount, 2.92 mm × 1.3 mm footprint, 1.0 mm height - optimized for high-density PCB layouts in portable and industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Current sink / output node | Connected to regulated voltage node; sinks total current (load + reference bias); voltage referenced to Anode. |
| Anode (Pin 2) | Reference ground / return path | Typically tied to system ground; forms the 0 V reference point for output voltage; must be low-impedance. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to Anode (Pin 2) per TI EMI mitigation guidance; not usable as FB or ADJ. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Operates stably with any capacitive load (0–∞ F); eliminates BOM cost and layout area for output bypass caps. |
| Micropower operation | 45 μA typical minimum cathode current enables >10-year battery life in coin-cell–powered IoT sensors. |
| Industrial temperature range | Specified from –40°C to +85°C; qualified for deployment in outdoor energy meters and factory-floor PLC I/O modules. |
| Low thermal hysteresis | 120 ppm long-term drift after 1000 h; ensures repeatable voltage output across thermal cycling in automotive cabin modules. |
| ESD robustness | ±2000 V HBM rating; withstands handling in standard assembly lines without special ESD controls beyond Class 1A requirements. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution 16-bit SAR ADC front-end in portable multimeters and environmental sensor nodes. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for ADC VREF input, directly determining full-scale measurement accuracy. Use Value: ±0.5% tolerance and 100 ppm/°C drift limit total reference-induced error to <0.1% FS across operating temperature, meeting Class A metering standards. |
Use Scenario: Overvoltage/undervoltage detection in DC-DC converter feedback loops for telecom base station power supplies. IC Role / Device Role / Timing Role: Shunt-connected to monitor output rail; triggers protection circuitry when voltage deviates beyond ±1% threshold. Use Value: Micropower operation (45 μA min) avoids loading regulation loop; tight tolerance ensures trip-point repeatability within ±12 mV. |
| Process Control Transmitters | Battery-Powered Equipment |
Use Scenario: 4–20 mA loop-powered pressure transmitter with onboard analog signal conditioning. IC Role / Device Role / Timing Role: Supplies precise bias voltage for bridge sensor amplification and DAC output scaling. Use Value: 20 μVRMS noise prevents added uncertainty in sub-0.1%FS pressure readings; low drift maintains calibration over 2+ years in unattended installations. |
Use Scenario: Low-power medical patch monitor using CR2032 coin cell and ultra-low-quiescent LDOs. IC Role / Device Role / Timing Role: Reference for battery voltage gauging circuit and sensor biasing in sleep-mode operation. Use Value: 45 μA minimum cathode current aligns with microamp-level sleep budgets; SOT-23 footprint saves >1.5 mm² vs. SOIC alternatives. |
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 2.5 V reference (2.495–36 V via resistors); higher 100 μA min cathode current; ±1% tolerance; 50 ppm/°C typical drift. | Requires external resistors for 1.225 V; unsuitable for space-constrained layouts needing fixed output; better for programmable thresholds. | Select TL431ACDBZR only if adjustable output or higher voltage (>2.5 V) is required; LM4041C12IDBZT offers superior accuracy, lower IQ, and smaller size for fixed 1.225 V use. |
| MAX6126AASA+ | Fixed 1.225 V series reference; ±0.06% initial tolerance; 3 ppm/°C drift; 1.5 μVRMS noise; requires 100 μA supply current. | Three-terminal series topology demands dedicated supply pin; incompatible with shunt-based topologies; higher cost and larger SO-8 package. | Choose MAX6126AASA+ only when ultra-low drift (<5 ppm/°C) and sub-μV noise are mandatory; LM4041C12IDBZT provides optimal balance of accuracy, size, and simplicity for most industrial shunt applications. |
Compared with TL431ACDBZR and MAX6126AASA+, the LM4041C12IDBZT delivers the smallest footprint, lowest quiescent current, and best cost-performance ratio for fixed 1.225 V shunt referencing - especially where board space, battery life, and thermal stability are prioritized over ultra-high precision.
Availability
LM4041C12IDBZT is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and process-control transmitters requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for LM4041C12IDBZT 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 expertise in precision reference design and high-reliability manufacturing.
The LM4041 product line was engineered for high-accuracy, low-power shunt voltage referencing in space-constrained industrial, automotive, and portable applications - emphasizing micropower operation, wide current range, and zero-capacitor stability.
FAQ
What is the maximum cathode current rating for LM4041C12IDBZT?
The LM4041C12IDBZT 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. Designers must size the series resistor (RS) to ensure cathode current stays within 45 μA to 12 mA across all operating conditions - including worst-case supply voltage and minimum load current. The LM4041C12IDBZT datasheet provides detailed calculation guidance in Section 7.4.
Does LM4041C12IDBZT require an output capacitor for stability?
No, the LM4041C12IDBZT does not require an output capacitor for stability. Its internal architecture ensures unconditional stability with all capacitive loads - from 0 F to arbitrarily large values - eliminating the need for external bypass components. This simplifies BOM, reduces PCB area, and avoids capacitor-related aging or temperature drift effects. TI explicitly confirms this behavior in Section 7.1 of the LM4041C12IDBZT datasheet.
What is the operating temperature range of LM4041C12IDBZT?
The LM4041C12IDBZT is characterized for operation across –40°C to +85°C ambient temperature, matching the industrial temperature grade. All key specifications - including output voltage tolerance, temperature coefficient, and cathode current limits - are guaranteed across this full range. This makes the LM4041C12IDBZT suitable for deployment in harsh environments such as factory automation controllers, outdoor utility meters, and automotive under-hood modules where extended thermal coverage is essential.
How does the LM4041C12IDBZT differ from the adjustable LM4041 variants?
The LM4041C12IDBZT is a fixed-output variant delivering precisely 1.225 V, with no feedback (FB) pin - unlike adjustable versions (e.g., LM4041CIZ) that require external resistors and use a dedicated FB pin to set outputs from 1.225 V to 10 V. The LM4041C12IDBZT uses a 3-pin SOT-23 package with Cathode, Anode, and NC pins only; it cannot be reconfigured. Its tighter specification focus on fixed-voltage accuracy, lower noise, and simpler implementation makes it ideal for applications where 1.225 V is the system reference requirement.
Is LM4041C12IDBZT RoHS-compliant and lead-free?
Yes, the LM4041C12IDBZT is RoHS-compliant and lead-free. Per TI's Packaging Information addendum, the part carries "Yes" in the RoHS column and specifies "NIPDAU" (nickel-palladium-gold) or "SN" (tin) as the lead finish. It meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1, with peak reflow temperature rated at 260°C. Full compliance documentation, including material declarations and test reports, is available through TI's official product folder for LM4041C12IDBZT.
LM4041C12IDBZT 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:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041C12IDBZT FAQ
1.How can I place an order for LM4041C12IDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041C12IDBZT 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 LM4041C12IDBZT reliable?
The price and inventory of LM4041C12IDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041C12IDBZT is usually 5 days.
3.What payment methods are accepted for LM4041C12IDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041C12IDBZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041C12IDBZT?
LM4041C12IDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041C12IDBZT 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 LM4041C12IDBZT?
For technical support, including LM4041C12IDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041C12IDBZT requirements.
6.How does Aetrix verify that LM4041C12IDBZT is sourced from the original manufacturer or authorized distributors?
All LM4041C12IDBZT 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 LM4041C12IDBZT meets industry standards.
7.What is the process for return or replacement of LM4041C12IDBZT?
All LM4041C12IDBZT units undergo pre-shipment inspection (PSI). If there is an issue with LM4041C12IDBZT, 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 LM4041C12IDBZT part is unused and in its original packaging.
Return procedure for LM4041C12IDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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