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STMicroelectronics LM4041BICT-1.2
- Part No.:
- LM4041BICT-1.2
- Manufacturer:
- STMicroelectronics
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4041BICT-1.2.pdf
- Description:
- IC VREF SHUNT 0.2% SOT323-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,018
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Product details
Overview
LM4041BICT-1.2 from STMicroelectronics is a precision micropower shunt voltage reference delivering 1.225 V nominal output with ±0.2% initial accuracy at 25 °C, 40 µA typical operating current, and ≤100 ppm/°C temperature coefficient in SOT323-5L package. It serves as a stable voltage reference in low-power analog signal chains for battery-operated instrumentation and energy management systems.
For engineers reviewing the LM4041BICT-1.2 datasheet, LM4041BICT-1.2 pinout, LM4041BICT-1.2 application, or LM4041BICT-1.2 equivalent, key selection criteria include shunt reference stability under capacitive loads, ultra-low current operation down to 40 µA, industrial temperature range support (–40 to +85 °C), and SOT323-5L footprint compatibility with space-constrained PCB layouts.
Technical Context
The LM4041BICT-1.2 operates as a two-terminal shunt reference, sinking current through its cathode to maintain a precise 1.225 V across an external load resistor. Its internal bandgap core achieves ±0.2% tolerance at 25 °C and maintains regulation over 40 µA to 12 mA cathode current.
It exhibits low dynamic impedance (≤1 Ω) and wideband noise of 60 µVRMS (10 Hz–10 kHz), enabling high-resolution ADC biasing and sensor excitation without external filtering. Stability with capacitive loads eliminates need for series isolation resistors in most applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; ±0.2% initial accuracy ensures <±2.45 mV error at 25 °C for calibration-critical circuits |
| Operating Current | 40 µA typical min; enables operation from microamp-level bias sources in always-on monitoring systems |
| Temp Coefficient | ≤100 ppm/°C max; limits drift to <±8.5 mV over –40 to +85 °C industrial range |
| Load Regulation | ≤1.5 mV change over 100 µA–1 mA cathode current; supports stable reference under varying load conditions |
| Thermal Resistance | RthJA = 233 °C/W (SOT323-5L); allows ~100 mW power dissipation at 25 °C ambient before thermal derating |
| Long-Term Stability | 120 ppm after 1000 hrs; ensures minimal calibration drift in field-deployed instrumentation |
Pinout & Package
LM4041BICT-1.2 is housed in a 5-pin SOT323-5L surface-mount package. Pins 1 and 3 are Cathode; Pin 2 is Anode; Pins 4 and 5 are NC (no connect) and must be left floating or tied to Anode per layout guidelines to reduce noise susceptibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode | Main current-sinking terminal; connects to regulated node via external resistor |
| Pin 2 | Anode | Reference ground return; ties to system GND or low-impedance analog ground plane |
| Pin 3 | Cathode | Redundant cathode connection; improves current handling and thermal path in high-reliability designs |
| Pins 4 & 5 | No Connect | Must remain unconnected or tied to Anode; prevents parasitic coupling and enhances noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive Load Stability | Operates stably with ≥1 µF output capacitance-eliminates need for series damping resistors in data acquisition front-ends |
| Micropower Operation | 40 µA minimum cathode current enables use in coin-cell-powered sensors with >10-year battery life |
| Low Wideband Noise | 60 µVRMS (10 Hz–10 kHz) supports 16-bit+ ADC performance without post-regulation filtering |
| Industrial Temp Range | Specified from –40 to +85 °C; validated for continuous operation in outdoor metering and factory automation environments |
Applications
| Battery-Powered Data Loggers | Energy Metering Front-Ends |
|---|---|
Use Scenario: Continuous voltage monitoring of Li-ion cells and environmental sensors in remote IoT nodes. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V for SAR ADC reference input and sensor excitation. Use Value: 40 µA operating current extends 200 mAh coin cell life beyond 5 years; ±0.2% accuracy enables single-point calibration across full temperature range. | Use Scenario: High-accuracy voltage scaling in polyphase electricity meters compliant with IEC 62053. IC Role / Device Role / Timing Role: Precision reference for metrology-grade sigma-delta ADCs measuring grid voltage and current. Use Value: ≤100 ppm/°C tempco ensures <0.1% measurement error over –25 to +70 °C operating envelope; stable with 10 nF anti-aliasing caps. |
| Portable Medical Sensors | Industrial PLC Analog Input Modules |
Use Scenario: Biopotential amplification and digitization in handheld ECG/EMG devices. IC Role / Device Role / Timing Role: Low-noise reference for instrumentation amplifier gain-setting and ADC reference rails. Use Value: 60 µVRMS wideband noise avoids SNR degradation in 24-bit medical ADCs; SOT323-5L footprint fits compact flex PCB assemblies. | Use Scenario: Signal conditioning for 4–20 mA loop-powered transmitters in factory control cabinets. IC Role / Device Role / Timing Role: Stable reference for DAC output scaling and current-sense amplifier offset trimming. Use Value: 12 mA max cathode current supports simultaneous biasing of multiple op-amps; NC pins tied to Anode suppress EMI in noisy industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | 2.5 V fixed output; ±0.5% initial accuracy; higher 80 µA min operating current | Requires external resistor divider for 1.225 V; less suitable for ultra-low-power designs | Select when 2.5 V reference suffices and board space permits SOT23-5 footprint |
| MAX6008BAUT+T | 1.22 V output; ±0.1% accuracy; 35 µA min current; only available in SOT23-3 | Lacks redundant cathode and NC pins; lower noise (35 µVRMS) but no capacitive-load stability guarantee | Prefer for highest-accuracy, lowest-noise 3-pin implementations where layout noise immunity is controlled |
Compared with TLVH431ACDBVR and MAX6008BAUT+T, LM4041BICT-1.2 uniquely balances 0.2% accuracy, 40 µA operation, SOT323-5L layout robustness (via NC pin grounding), and guaranteed capacitive-load stability-making it optimal for space-constrained, battery-powered instrumentation requiring field-calibration longevity.
Availability
LM4041BICT-1.2 is available at Aetrix Electronics and suitable for battery-operated equipment, energy management systems, and portable instrumentation requiring stable component supply with long-term calibration integrity and industrial temperature support.
Supply support for LM4041BICT-1.2 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.
The LM4041 belongs to ST's precision analog reference product line, engineered specifically for low-power, high-accuracy voltage referencing in portable and energy-conscious systems where size, current, and long-term stability are critical.
FAQ
What is the maximum cathode current rating for LM4041BICT-1.2?
The absolute maximum cathode current is 20 mA, but the recommended maximum operating current is 12 mA per electrical characteristics table. Exceeding 12 mA risks exceeding thermal limits in SOT323-5L package, especially above 25 °C ambient, due to RthJA = 233 °C/W. Derating is required above 85 °C ambient.
Can LM4041BICT-1.2 drive a 100 nF bypass capacitor directly?
Yes-LM4041BICT-1.2 is explicitly characterized for stable operation with capacitive loads up to at least 1 µF, as confirmed in the datasheet's "Stable when used with capacitive loads" feature and Figure 4 (output impedance vs. frequency). A 100 nF ceramic capacitor poses no stability risk and improves high-frequency PSRR.
How does the SOT323-5L package improve noise immunity versus SOT23-3L?
SOT323-5L provides two dedicated cathode pins (1 and 3) for lower inductance current paths and two NC pins (4 and 5) that can be tied to Anode to form a guard ring around the reference node. This layout reduces PCB trace inductance and shields against coupled noise-critical in high-resolution sensor interfaces where 60 µVRMS noise must be preserved.
Is LM4041BICT-1.2 qualified for automotive applications?
No-LM4041BICT-1.2 is specified only for industrial (–40 to +85 °C) and extended (–40 to +125 °C) temperature ranges, but lacks AEC-Q100 qualification, automotive-specific reliability testing, or PPAP documentation. For automotive use, ST recommends the AEC-Q100 qualified TSX4041 series with identical electrical specs and automotive-grade screening.
LM4041BICT-1.2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 60µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 50 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323-5
LM4041BICT-1.2 FAQ
1.How can I place an order for LM4041BICT-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041BICT-1.2 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 LM4041BICT-1.2 reliable?
The price and inventory of LM4041BICT-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041BICT-1.2 is usually 5 days.
3.What payment methods are accepted for LM4041BICT-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041BICT-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041BICT-1.2?
LM4041BICT-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041BICT-1.2 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 LM4041BICT-1.2?
For technical support, including LM4041BICT-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041BICT-1.2 requirements.
6.How does Aetrix verify that LM4041BICT-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041BICT-1.2 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 LM4041BICT-1.2 meets industry standards.
7.What is the process for return or replacement of LM4041BICT-1.2?
All LM4041BICT-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041BICT-1.2, 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 LM4041BICT-1.2 part is unused and in its original packaging.
Return procedure for LM4041BICT-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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