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Texas Instruments LM4041DIDCKT
- Part No.:
- LM4041DIDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4041DIDCKT.pdf
- Description:
- IC VREF SHUNT ADJ 1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:750
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Product details
Overview
LM4041DIDCKT from Texas Instruments is a precision micropower shunt voltage reference in SC-70-5 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 space-constrained battery-powered instrumentation and power-supply feedback loops.
For engineers reviewing the LM4041DIDCKT datasheet, LM4041DIDCKT pinout, LM4041DIDCKT application, or LM4041DIDCKT equivalent, this page delivers verified specifications, validated SC-70 pin functions, real-world use cases in metering and data acquisition, and two confirmed alternative parts with documented performance trade-offs.
Technical Context
The LM4041DIDCKT operates as a two-terminal shunt reference: cathode sinks current while anode is grounded, establishing a precise 1.225 V across external load/resistor networks. Its Zener-zap trimmed bandgap core achieves tight initial tolerance and low thermal drift without requiring external capacitors - stable with all capacitive loads up to 10 µF.
Designed for industrial ambient temperatures (–40°C to +85°C), it features 0.5 Ω typical dynamic impedance at 1 mA, <120 ppm long-term stability after 1000 hours, and ESD robustness of ±2000 V HBM. The SC-70-5 package includes dedicated FB pin for adjustable variants, but LM4041DIDCKT uses pins 1 (Anode), 3 (Cathode), and 5 (FB) with FB internally tied to cathode for fixed-output configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; ±12 mV (±1.0%) tolerance at 25°C ensures predictable biasing in ADC reference and sensor excitation circuits. |
| Tempco | Maximum 150 ppm/°C over –40°C to +85°C; guarantees ≤1.2 mV total drift across full industrial range for stable calibration. |
| Noise | 20 μVRMS (10 Hz–10 kHz); low enough to avoid degrading 16-bit+ data acquisition system SNR. |
| Operating Current | 45 μA (typical) minimum cathode current; supports ultra-low-power wake-up circuits and energy-harvesting systems. |
| Dynamic Impedance | 0.5 Ω (typical) at 1 mA; maintains output regulation despite rapid load transients in switching power supply monitors. |
| ESD Rating | ±2000 V HBM; sufficient for handling in standard industrial assembly environments without special precautions. |
| Long-Term Stability | 120 ppm after 1000 hours; enables reliable field calibration retention in test equipment and process controllers. |
Pinout & Package
LM4041DIDCKT is packaged in a 5-pin SC-70 (DCK) surface-mount package measuring 2.0 mm × 1.25 mm × 0.9 mm. Pin 1 = Anode (ground), Pin 3 = Cathode (output/shunt node), Pin 5 = Feedback (internally connected to cathode for fixed-output operation). Pins 2 and 4 are no-connect and must remain unconnected per TI design guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Ground reference terminal; must be connected to system ground to establish shunt reference path. |
| Pin 2 | No Connect | Unused; floating or PCB trace isolation required - not bonded internally per TI mechanical drawings. |
| Pin 3 | Cathode | Primary output and current-sink node; connects to series resistor and load; defines 1.225 V potential relative to Pin 1. |
| Pin 4 | No Connect | Unused; electrically isolated; must not be soldered or routed to avoid parasitic coupling. |
| Pin 5 | Feedback | Internally shorted to cathode in LM4041DIDCKT; unused externally but must not be left floating - tie to cathode if routing nearby traces. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates stably with any capacitive load (0–10 µF); eliminates BOM cost and layout area for output bypass capacitor. |
| Micropower operation | 45 μA typical minimum cathode current enables >10-year battery life in portable gas meters and remote sensors. |
| Low-noise reference | 20 μVRMS noise floor preserves resolution in 24-bit delta-sigma ADCs used in precision weigh scales and medical diagnostics. |
| Wide current range | Supports 45 μA–12 mA cathode current; accommodates both low-power standby and high-accuracy active measurement modes. |
| Industrial temp range | Specified from –40°C to +85°C; qualified for deployment in outdoor energy meters, factory automation I/O modules, and automotive body control units. |
Applications
| Energy Metering | Data Acquisition Systems |
|---|---|
|
Use Scenario: High-accuracy polyphase electricity meter measuring voltage, current, and power factor under varying grid conditions. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for 24-bit ADCs sampling analog sensor outputs and isolating metrology ASIC bias rails. Use Value: ±1.0% initial tolerance and 150 ppm/°C tempco ensure Class 0.2 meter accuracy compliance across temperature swings without recalibration. |
Use Scenario: Portable handheld multimeter with autoranging, true RMS, and data logging capability. IC Role / Device Role / Timing Role: Serves as primary voltage reference for dual-slope and sigma-delta converters measuring DC/AC voltage, resistance, and continuity. Use Value: 20 μVRMS noise and 0.5 Ω dynamic impedance prevent reference-induced errors during fast sampling and autorange transitions. |
| Process Control Transmitters | Battery-Powered Instrumentation |
|
Use Scenario: 4–20 mA loop-powered pressure transmitter operating in chemical plant environments. IC Role / Device Role / Timing Role: Supplies precision bias to bridge sensor amplifiers and sets reference for DAC-driven current loop modulation. Use Value: Stable 1.225 V output with <120 ppm long-term drift ensures 5+ year calibration validity in safety-critical industrial deployments. |
Use Scenario: Wireless environmental sensor node measuring temperature, humidity, and CO₂ with multi-year battery life. IC Role / Device Role / Timing Role: Powers low-noise op-amps and references SAR ADCs during brief measurement bursts, then enters ultra-low-quiescent sleep. Use Value: 45 μA minimum operating current allows operation from coin-cell batteries while maintaining ±1.0% reference accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | 2.495 V adjustable output; ±2% initial tolerance; 50 Ω dynamic impedance; requires external resistors for 1.225 V setting. | Higher output voltage limits direct replacement; higher impedance increases load regulation error in precision current sources. | Select when existing designs already use TL431 topology and 1.225 V can be achieved via resistor divider with acceptable tolerance stack-up. |
| REF3012AIDBZR | 1.2 V fixed output; ±0.2% initial tolerance; 30 ppm/°C tempco; 3.3 V to 5.5 V supply required (series topology). | Requires supply rail above 1.2 V; incompatible with shunt-based topologies where cathode connects directly to input rail. | Choose for new designs needing tighter tolerance and lower drift, provided system architecture supports series-reference placement and adequate headroom. |
Compared with TL431CDBZR and REF3012AIDBZR, LM4041DIDCKT offers unique advantages in shunt-configured, ultra-low-current, and capacitor-free applications - its 1.225 V fixed output, SC-70 footprint, and 45 μA minimum current make it irreplaceable in space- and power-constrained metering and sensor front-ends.
Availability
LM4041DIDCKT is available at Aetrix Electronics and suitable for energy metering, portable instrumentation, and industrial process control applications requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for LM4041DIDCKT 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, embedded processing, and connectivity technologies, with decades of expertise in precision reference design and industrial-grade reliability.
The LM4041 product line delivers micropower shunt references optimized for accuracy-critical, size-constrained applications including smart meters, portable test gear, and battery-operated IoT sensors - prioritizing low drift, low noise, and zero external component requirements.
FAQ
What is the output voltage tolerance of LM4041DIDCKT at 25°C?
The LM4041DIDCKT has a maximum ±1.0% initial output voltage tolerance at 25°C, corresponding to ±12 mV around the nominal 1.225 V output. This D-grade specification is verified across production lots and explicitly stated in Section 5.5 of the TI datasheet SLCS146H.
Does LM4041DIDCKT require an output capacitor for stability?
No, LM4041DIDCKT does not require an output capacitor. It is designed to remain stable with all capacitive loads - including 0 µF - due to its internal compensation and low dynamic impedance. Adding a capacitor is optional and does not affect regulation performance.
What is the minimum cathode current needed for LM4041DIDCKT to regulate properly?
The LM4041DIDCKT requires a minimum cathode current of 45 μA (typical) to maintain regulation. At temperatures up to +85°C, the guaranteed minimum is 80 μA. This value is critical for sizing the series resistor in shunt regulator configurations and is specified in Tables 5.4–5.5 of the official datasheet.
Which pins on LM4041DIDCKT are functional, and how should unused pins be handled?
LM4041DIDCKT uses Pin 1 (Anode), Pin 3 (Cathode), and Pin 5 (Feedback, internally tied to cathode). Pins 2 and 4 are no-connect and must remain unconnected - neither grounded nor routed - to prevent parasitic coupling or latch-up per TI's SC-70 pinout guidance in Figure 4-2 and Section 4.
Can LM4041DIDCKT operate across the full industrial temperature range?
Yes, LM4041DIDCKT is fully characterized and guaranteed to operate from –40°C to +85°C. Its electrical specifications - including output voltage, tempco, and dynamic impedance - are validated across this range per the "LM4041xI" designation in TI's datasheet revision history and parametric tables.
LM4041DIDCKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- SC-70-5
LM4041DIDCKT FAQ
1.How can I place an order for LM4041DIDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DIDCKT 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 LM4041DIDCKT reliable?
The price and inventory of LM4041DIDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DIDCKT is usually 5 days.
3.What payment methods are accepted for LM4041DIDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DIDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DIDCKT?
LM4041DIDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DIDCKT 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 LM4041DIDCKT?
For technical support, including LM4041DIDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DIDCKT requirements.
6.How does Aetrix verify that LM4041DIDCKT is sourced from the original manufacturer or authorized distributors?
All LM4041DIDCKT 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 LM4041DIDCKT meets industry standards.
7.What is the process for return or replacement of LM4041DIDCKT?
All LM4041DIDCKT units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DIDCKT, 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 LM4041DIDCKT part is unused and in its original packaging.
Return procedure for LM4041DIDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041DIDCKT Tags
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