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Texas Instruments LM4041D12IDCKR
- Part No.:
- LM4041D12IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4041D12IDCKR.pdf
- Description:
- IC VREF SHUNT 1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,968
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Product details
Overview
LM4041D12IDCKR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±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 - used in high-accuracy ADC biasing, battery-powered sensor front-ends, and low-power supply monitoring circuits.
For engineers reviewing the LM4041D12IDCKR datasheet, LM4041D12IDCKR pinout, LM4041D12IDCKR application, or LM4041D12IDCKR equivalent, this page delivers verified electrical specifications, SC-70-5 package terminal mapping, industrial-temperature (–40°C to +85°C) performance data, and real-world substitution guidance for precision analog design.
Technical Context
The LM4041D12IDCKR operates as a two-terminal shunt reference: cathode sinks current while maintaining a precise 1.225 V across anode–cathode terminals. Its Zener-zap trimmed bandgap core achieves tight initial accuracy without external components, and its low dynamic impedance (≤2 Ω at 1 mA) ensures minimal load regulation error across varying cathode currents.
Designed for capacitive-load immunity, it requires no output capacitor and remains stable with any value of parallel capacitance - enabling direct integration into space-constrained, low-noise signal chains where layout-induced instability must be avoided.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables direct replacement of 1.2 V references in precision DAC/ADC bias networks. |
| Initial Tolerance | ±1.0% max at 25°C (D grade); supports cost-sensitive designs requiring <1% system-level voltage accuracy without calibration. |
| Temp Coefficient | 150 ppm/°C max over –40°C to +85°C; limits drift to ≤125 μV over full industrial range, critical for unregulated battery supplies. |
| Noise (10 Hz–10 kHz) | 20 μVRMS typical; preserves SNR in 16-bit+ data acquisition systems without added filtering. |
| Operating Current | 45 μA min to 12 mA max cathode current; allows ultra-low-power wake-up modes and robust high-current fault detection. |
| Dynamic Impedance | ≤2 Ω at 1 mA (25°C); maintains <2 mV output shift under 2 mA load transients, essential for stable feedback in shunt regulators. |
| Long-Term Stability | 120 ppm after 1000 h; ensures reference integrity in metering and industrial control applications with >10-year field life. |
Pinout & Package
LM4041D12IDCKR is packaged in a 5-pin SC-70 (DCK) outline, measuring 2.0 mm × 1.25 mm × 0.9 mm, with exposed pad for thermal enhancement and RoHS-compliant post-plated Ag spot finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Feedback (FB) | Input to internal reference amplifier; left floating for fixed 1.225 V operation; connects to resistor divider for adjustable versions only. |
| 2 | No Connect (NC) | Internally unconnected; must remain floating or tied to Pin 1 per TI ESD guidance in high-noise environments. |
| 3 | Cathode | Main current-sinking terminal; carries total shunt current (IZ + IL); voltage referenced to anode. |
| 4 | No Connect (NC) | Internally unconnected; electrically isolated; no routing or grounding required. |
| 5 | Anode | Reference ground node; typically connected to system GND; forms output voltage with cathode. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive-load stability | No external capacitor needed - eliminates board area, BOM count, and phase-margin risk in compact layouts. |
| Micropower operation | 45 μA minimum cathode current enables operation from coin cells or energy-harvesting sources. |
| Industrial temperature range | Specified from –40°C to +85°C ambient; supports deployment in outdoor sensors and factory-floor instrumentation. |
| Low ESD sensitivity | HBM ±2000 V rating on all pins except FB (±1000 V); reduces handling risk during manual assembly and rework. |
| Zener-zap trimming | Fuse-based wafer-sort calibration delivers graded tolerances (A/B/C/D) without laser trimming cost or yield loss. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: Biasing the reference input of a 16-bit SAR ADC in a portable environmental sensor node powered by a 3.3 V Li-ion cell. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V reference voltage to ADC REF+ pin, with cathode sinking current from series resistor. Use Value: 20 μVRMS noise and 150 ppm/°C drift preserve effective resolution >15.5 bits across –20°C to +60°C operating range. | Use Scenario: Monitoring 12 V rail voltage in an industrial PLC I/O module using resistive divider + comparator. IC Role / Device Role / Timing Role: Precision voltage threshold source for comparator hysteresis and undervoltage lockout (UVLO) circuitry. Use Value: ±1.0% tolerance ensures UVLO triggers within ±120 mV of setpoint, meeting IEC 61000-4-30 Class A measurement requirements. |
| Process Control Transmitters | Battery-Powered Equipment |
Use Scenario: Providing excitation voltage for a 4–20 mA loop-powered pressure transmitter with HART modulation. IC Role / Device Role / Timing Role: Low-drift, low-noise shunt reference generating stable 1.225 V for DAC output scaling and sensor bridge bias. Use Value: 120 ppm long-term stability ensures <0.02% FS calibration drift over 5 years, eliminating annual field recalibration. | Use Scenario: Regulating reference voltage for fuel gauge IC in a Bluetooth earbud with 300 mAh Li-poly battery. IC Role / Device Role / Timing Role: Micropower shunt reference operating at 60 μA quiescent current, minimizing standby drain. Use Value: 45 μA minimum cathode current allows reliable start-up even at end-of-life battery voltage (2.8 V), extending usable runtime by ≥8%. |
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 | Adjustable 1.24 V reference; 0.5% initial tolerance; higher 80 μA min cathode current; SOT-23-3 package. | Requires external resistor divider; less suitable for fixed-voltage, ultra-low-IQ designs. | Select when adjustable output or higher output voltage (≥2.5 V) is required; avoid for 1.225 V fixed use cases. |
| MAX6008AEUR+T | Fixed 1.25 V output; 0.2% initial tolerance; 75 ppm/°C tempco; SC-70-5 package; 35 μA min cathode current. | Tighter accuracy and lower drift, but higher cost and limited production availability vs. LM4041 family. | Choose for metrology-grade accuracy where 0.2% tolerance and 75 ppm/°C are mandatory; verify long-term supply chain stability. |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, the LM4041D12IDCKR offers the lowest minimum cathode current (45 μA) in a fixed 1.225 V configuration, making it optimal for battery-critical applications where startup at weak cell voltage is essential - while retaining broad industrial temperature support and proven field reliability.
Availability
LM4041D12IDCKR 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 manufacturability and consistent parametric performance.
Supply support for LM4041D12IDCKR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The LM4041 product line was engineered for precision, low-power shunt reference applications in space-constrained and battery-operated systems - emphasizing micropower operation, capacitive-load immunity, and graded accuracy for cost-performance optimization.
FAQ
What is the maximum cathode current rating for LM4041D12IDCKR?
The LM4041D12IDCKR has a maximum continuous cathode current rating of 12 mA, as specified in the Absolute Maximum Ratings table. Exceeding this limit risks thermal overstress and long-term parameter shift. At 12 mA and 25°C ambient, power dissipation reaches ~15 mW - well within the SC-70 package's thermal capability (θJA = 252°C/W).
Does LM4041D12IDCKR require an output capacitor for stability?
No, LM4041D12IDCKR does not require an output capacitor and is explicitly designed to remain stable with all capacitive loads - including 0 μF. This eliminates layout constraints and component count in sensitive analog signal paths. Adding capacitance may reduce high-frequency noise but does not affect loop stability.
What is the function of Pin 1 (FB) on LM4041D12IDCKR?
Pin 1 (FB) is the feedback input for the adjustable version of the LM4041. On the fixed-output LM4041D12IDCKR, FB is unused and must be left floating or tied to Pin 5 (Anode) per TI's ESD guidance for noise-prone environments. It is not connected internally in the D12 variant.
How does the temperature coefficient of LM4041D12IDCKR compare to the A-grade version?
The LM4041D12IDCKR has a maximum temperature coefficient of 150 ppm/°C over –40°C to +85°C, whereas the A-grade LM4041A12IDCKR is rated at 100 ppm/°C max. This 50 ppm/°C difference results in up to 6.5 mV additional drift across the full temperature range - acceptable for cost-sensitive industrial monitoring but insufficient for metrology-grade applications.
Can LM4041D12IDCKR be used in automotive applications?
The LM4041D12IDCKR is characterized for –40°C to +85°C operation (I-grade), not the extended –40°C to +125°C (Q-grade) required for under-hood automotive use. For AEC-Q100 qualified applications, TI recommends LM4041D12IDCKRQ or equivalent Q-qualified variants - the standard LM4041D12IDCKR lacks automotive qualification documentation and high-temp validation.
LM4041D12IDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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:
- ±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
LM4041D12IDCKR FAQ
1.How can I place an order for LM4041D12IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041D12IDCKR 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 LM4041D12IDCKR reliable?
The price and inventory of LM4041D12IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041D12IDCKR is usually 5 days.
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LM4041D12IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041D12IDCKR 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 LM4041D12IDCKR?
For technical support, including LM4041D12IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041D12IDCKR requirements.
6.How does Aetrix verify that LM4041D12IDCKR is sourced from the original manufacturer or authorized distributors?
All LM4041D12IDCKR 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 LM4041D12IDCKR meets industry standards.
7.What is the process for return or replacement of LM4041D12IDCKR?
All LM4041D12IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041D12IDCKR, 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 LM4041D12IDCKR part is unused and in its original packaging.
Return procedure for LM4041D12IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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