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Texas Instruments LM4041A12IDBZT
- Part No.:
- LM4041A12IDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041A12IDBZT.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:908
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Product details
Overview
LM4041A12IDBZT from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±0.1% initial tolerance (A 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 low-drift, low-noise voltage reference in high-accuracy analog signal chains and portable power monitoring circuits.
For engineers reviewing the LM4041A12IDBZT datasheet, LM4041A12IDBZT pinout, LM4041A12IDBZT application, or LM4041A12IDBZT equivalent, this page delivers verified specifications, SOT-23-3 pin mapping, industrial-temperature (–40°C to 85°C) performance data, and validated alternative parts for precision voltage reference selection.
Technical Context
The LM4041A12IDBZT implements a Zener-based shunt reference architecture trimmed via fuse and Zener-zap during wafer sort to achieve ±0.1% output tolerance at 25°C. Its internal structure includes a low-dynamic-impedance (0.5 Ω typical at 1 mA) core and integrated ESD protection rated to ±2 kV HBM.
It operates as a two-terminal device-cathode and anode-with no feedback pin required (fixed-output variant). Stability is guaranteed across all capacitive loads without external compensation, and long-term drift is limited to 120 ppm over 1000 hours at 25°C.
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 | ±0.1% max at 25°C (A grade); ensures minimal calibration burden in factory-trimmed systems. |
| Temp Coefficient | 100 ppm/°C max over –40°C to 85°C; maintains ≤1.23 mV total drift across full industrial range. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); supports high-resolution ADCs and low-noise instrumentation amplifiers. |
| Cathode Current Range | 45 μA to 12 mA; allows use in ultra-low-power sensor nodes and higher-current biasing applications. |
| Dynamic Impedance | 0.5 Ω typical at 1 mA; minimizes output voltage shift under dynamic load transients. |
| Long-Term Drift | 120 ppm over 1000 h at 25°C; supports 10+ year system reliability in metering and industrial control. |
Pinout & Package
SOT-23-3 (DBZ) package: 3-pin surface-mount, 1.3 mm × 2.9 mm footprint, JEDEC MO-178 compatible, 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 at this node relative to anode. |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground or lowest potential point; defines output voltage reference point. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to anode per TI recommendation for EMI immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Operates stably with any capacitive load; eliminates BOM cost and layout area for bypass caps. |
| Micropower operation | 45 μA minimum cathode current enables battery life extension in >5-year IoT sensor designs. |
| Industrial temperature range | Specified from –40°C to +85°C; qualified for deployment in outdoor metering and factory automation. |
| Low ESD sensitivity | ±2 kV HBM rating; survives standard handling without special ESD controls beyond Class 1A protocols. |
| Trimmed Zener core | Fuse/Zener-zap wafer-level trimming achieves ±0.1% tolerance without post-package adjustment. |
Applications
| Energy Metering | Portable Data Acquisition |
|---|---|
|
Use Scenario: High-accuracy polyphase electricity meter measuring active/reactive energy with 0.2S class compliance. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for 24-bit delta-sigma ADCs sampling current/voltage sensors. Use Value: ±0.1% tolerance and 100 ppm/°C TC ensure <0.05% total error contribution across temperature and lifetime. |
Use Scenario: Handheld multimeter with autoranging, true RMS, and 5½-digit resolution. IC Role / Device Role / Timing Role: Supplies reference voltage to dual-slope integrator and auto-zero amplifier stages. Use Value: 20 μVRMS noise prevents quantization uncertainty in sub-microvolt measurements. |
| Industrial Power-Supply Monitor | Battery-Powered Environmental Sensor Node |
|
Use Scenario: PLC I/O module monitoring 24 V DC field bus voltage with fault detection and reporting. IC Role / Device Role / Timing Role: Shunt reference in resistive divider network feeding comparator and microcontroller ADC. Use Value: Stable 45 μA–12 mA operating range accommodates varying divider currents while maintaining <1 mV regulation error. |
Use Scenario: LoRaWAN soil moisture/temperature node powered by CR2032 coin cell, operating 5+ years. IC Role / Device Role / Timing Role: Reference for low-power SAR ADC sampling analog sensor outputs. Use Value: Micropower 45 μA min current enables continuous monitoring mode without compromising battery longevity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040A12IDBZR | Same 1.225 V output and A-grade tolerance, but uses different trim methodology; 120 ppm/°C max TC vs. 100 ppm/°C for LM4041A12IDBZT. | Lacks guaranteed stability with all capacitive loads; requires ≥1 nF output capacitor for some configurations. | Select when lower-cost sourcing is prioritized and output capacitance can be added; verify layout stability per LM4040 datasheet. |
| REF3012AIDBZR | 1.2 V output, ±0.2% initial tolerance, 50 ppm/°C max TC, 3.3 V to 5.5 V supply-dependent operation (not shunt). | Series topology requires dedicated supply rail; incompatible with shunt-based divider topologies. | Choose only for new designs where supply headroom permits series reference use and tighter TC outweighs topology constraints. |
Compared with LM4040A12IDBZR and REF3012AIDBZR, the LM4041A12IDBZT uniquely combines A-grade tolerance, 100 ppm/°C TC, zero-capacitor stability, and true shunt operation-making it optimal for space-constrained, low-power, and legacy-compatible voltage reference implementations.
Availability
LM4041A12IDBZT is available at Aetrix Electronics and suitable for energy metering, portable data acquisition, and industrial power-supply monitor applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for LM4041A12IDBZT 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 and manufacturing.
The LM4041 product line delivers micropower, high-accuracy shunt voltage references optimized for industrial, metering, and portable instrumentation applications where size, stability, and low quiescent current are critical.
FAQ
What is the operating temperature range for LM4041A12IDBZT?
The LM4041A12IDBZT is characterized for operation from –40°C to +85°C (industrial temperature grade). All electrical specifications-including ±0.1% initial tolerance, 100 ppm/°C max temperature coefficient, and 45 μA minimum cathode current-are guaranteed across this full range. This makes LM4041A12IDBZT suitable for deployment in outdoor metering, factory automation, and automotive cabin electronics environments.
Does LM4041A12IDBZT require an output capacitor?
No, LM4041A12IDBZT does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads-from 0 pF up to large bulk capacitance-eliminating the need for external bypass components. This simplifies PCB layout, reduces BOM count, and improves reliability in space-constrained applications such as handheld test equipment and sensor modules.
What is the pin configuration of LM4041A12IDBZT?
LM4041A12IDBZT uses the SOT-23-3 (DBZ) package with Pin 1 = Cathode, Pin 2 = Anode, and Pin 3 = NC (no-connect). Pin 3 must either float or be tied to Pin 2 (Anode) per TI's EMI mitigation guidance. This fixed-output variant has no feedback pin-unlike adjustable versions-and functions as a true two-terminal shunt device.
How does LM4041A12IDBZT compare to LM4040A12IDBZR?
LM4041A12IDBZT offers tighter temperature coefficient (100 ppm/°C max vs. 120 ppm/°C), guaranteed stability with all capacitive loads (no capacitor required), and identical ±0.1% initial tolerance. While both are 1.225 V shunt references in SOT-23-3, LM4041A12IDBZT's architecture provides superior noise performance (20 μVRMS) and broader cathode current range (45 μA–12 mA), making it preferable for high-precision, low-power applications.
Is LM4041A12IDBZT suitable for battery-powered applications?
Yes, LM4041A12IDBZT is explicitly designed for battery-powered applications. Its 45 μA minimum cathode current enables multi-year operation on coin cells or primary batteries, and its micropower profile supports always-on sensing in environmental monitors, wearables, and remote telemetry nodes. Combined with low 20 μVRMS noise and ±0.1% accuracy, it delivers precision without sacrificing runtime.
LM4041A12IDBZT 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:
- ±0.1%
- 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
LM4041A12IDBZT FAQ
1.How can I place an order for LM4041A12IDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041A12IDBZT 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 LM4041A12IDBZT reliable?
The price and inventory of LM4041A12IDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041A12IDBZT is usually 5 days.
3.What payment methods are accepted for LM4041A12IDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041A12IDBZT transactions.
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4.How is shipping managed for LM4041A12IDBZT?
LM4041A12IDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041A12IDBZT 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 LM4041A12IDBZT?
For technical support, including LM4041A12IDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041A12IDBZT requirements.
6.How does Aetrix verify that LM4041A12IDBZT is sourced from the original manufacturer or authorized distributors?
All LM4041A12IDBZT 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 LM4041A12IDBZT meets industry standards.
7.What is the process for return or replacement of LM4041A12IDBZT?
All LM4041A12IDBZT units undergo pre-shipment inspection (PSI). If there is an issue with LM4041A12IDBZT, 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 LM4041A12IDBZT part is unused and in its original packaging.
Return procedure for LM4041A12IDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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